阅读说明：本技术 一种模拟信号的传输方法和装置 (Method and device for transmitting analog signals ) 是由 彭宇龙 韩杰 王艳辉 刘蒙 于 2018-06-28 设计创作，主要内容包括：本发明实施例提供了一种模拟信号的传输方法和装置,该方法包括：接收一路或多路模拟视频信号,以及,一路或多路模拟音频信号；将所述一路或多路模拟视频信号转换为一路或多路数字视频信号,以及,将所述一路或多路模拟音频信号转换为一路或多路数字音频信号；将每一路所述数字视频信号打包为视频数据包,以及,将每一路所述数字音频信号打包为音频数据包；将所述视频数据包与所述音频数据包发送至串行接口；通过所述串行接口将所述视频数据包与所述音频数据包串行发送至视联网终端。通过视联网终端接入视联网,在视联网中实现长距离传输,无需部署多个中继器,大大降低了成本,同时,实现了模拟视频信号、模拟音频信号的统一管理。(The embodiment of the invention provides a method and a device for transmitting an analog signal, wherein the method comprises the following steps: receiving one or more paths of analog video signals and one or more paths of analog audio signals; converting the one or more paths of analog video signals into one or more paths of digital video signals, and converting the one or more paths of analog audio signals into one or more paths of digital audio signals; packaging each path of digital video signals into a video data packet, and packaging each path of digital audio signals into an audio data packet; sending the video data packet and the audio data packet to a serial interface; and serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface. The video network terminal is accessed into the video network, long-distance transmission is realized in the video network, a plurality of repeaters are not required to be deployed, the cost is greatly reduced, and meanwhile, unified management of analog video signals and analog audio signals is realized.)

1. A method for transmitting an analog signal, comprising:

receiving one or more paths of analog video signals and one or more paths of analog audio signals;

converting the one or more paths of analog video signals into one or more paths of digital video signals, and converting the one or more paths of analog audio signals into one or more paths of digital audio signals;

packaging each path of digital video signals into a video data packet, and packaging each path of digital audio signals into an audio data packet;

sending the video data packet and the audio data packet to a serial interface;

and serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface.

2. The method of claim 1, wherein said packing each of said digital video signals into video data packets comprises:

inquiring video acquisition equipment for acquiring analog video signals corresponding to the digital video signals;

and writing the equipment identification of the video acquisition equipment into a video data packet.

3. The method of claim 1, wherein sending the video data packets and the audio data packets to a serial interface comprises:

calculating the distribution proportion of the video data packets and the audio data packets;

and sending the video data packet and the audio data packet to a serial interface according to the distribution proportion.

4. The method of claim 3, wherein the calculating the allocation ratio of the video data packets to the audio data packets comprises:

inquiring packet sizes of the video data packet and the audio data packet;

and setting the distribution proportion according to the size proportion between the packet sizes.

5. The method of claim 1, wherein sending the video data packets and the audio data packets to a serial interface comprises:

and if the packed video data packet or the packed audio data packet is detected, sending the packed video data packet or the packed audio data packet to a serial interface.

6. The method according to any one of claims 1-5, wherein the serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface comprises:

the video data packet and the audio data packet are serially sent to a protocol converter through the serial interface so as to carry out protocol conversion of video networking on the video data packet and the audio data packet;

and sending the video data packet and the audio data packet after protocol conversion to a video networking terminal through the protocol converter.

7. An apparatus for transmitting an analog signal, comprising:

the analog signal receiving module is used for receiving one or more paths of analog video signals and one or more paths of analog audio signals;

the analog signal conversion module is used for converting the one-way or multi-way analog video signals into one-way or multi-way digital video signals and converting the one-way or multi-way analog audio signals into one-way or multi-way digital audio signals;

the digital signal packaging module is used for packaging each path of digital video signal into a video data packet and packaging each path of digital audio signal into an audio data packet;

the serial interface sending module is used for sending the video data packet and the audio data packet to a serial interface;

and the video networking terminal sending module is used for serially sending the video data packet and the audio data packet to a video networking terminal through the serial interface.

8. The apparatus of claim 7, wherein the digital signal packing module comprises:

the video acquisition equipment query submodule is used for querying video acquisition equipment for acquiring the analog video signals corresponding to the digital video signals;

and the device identifier writing submodule is used for writing the device identifier of the video acquisition device into the video data packet.

9. The apparatus of claim 7, wherein the serial interface transmitting module comprises:

the distribution ratio calculation submodule is used for calculating the distribution ratio of the video data packet and the audio data packet;

and the distribution proportion sending submodule is used for sending the video data packet and the audio data packet to a serial interface according to the distribution proportion.

10. The apparatus of claim 9, wherein the distribution ratio calculation sub-module comprises:

a packet size inquiry unit configured to inquire packet sizes of the video data packet and the audio data packet;

a distribution ratio setting unit for setting a distribution ratio in accordance with a size ratio between the packet sizes.

Technical Field

The invention relates to the technical field of video networking, in particular to a transmission method and device of an analog signal.

Background

In a scene such as monitoring, analog signals are collected, that is, analog video signals and analog audio signals are collected, and the analog signals need to be transmitted to other places for other processing.

If the transmission path is long, a repeater is used at present, and the transmission quality of the analog signal is improved.

However, long-distance transmission requires a plurality of repeaters, which is costly and cumbersome to manage.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a method and apparatus for transmitting an analog signal that overcome or at least partially solve the above problems.

According to an aspect of the present invention, there is provided a method for transmitting an analog signal, including:

receiving one or more paths of analog video signals and one or more paths of analog audio signals;

converting the one or more paths of analog video signals into one or more paths of digital video signals, and converting the one or more paths of analog audio signals into one or more paths of digital audio signals;

packaging each path of digital video signals into a video data packet, and packaging each path of digital audio signals into an audio data packet;

sending the video data packet and the audio data packet to a serial interface;

and serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface.

Optionally, the packetizing each of the digital video signals into a video data packet includes:

inquiring video acquisition equipment for acquiring analog video signals corresponding to the digital video signals;

and writing the equipment identification of the video acquisition equipment into a video data packet.

Optionally, the sending the video data packet and the audio data packet to a serial interface includes:

calculating the distribution proportion of the video data packets and the audio data packets;

and sending the video data packet and the audio data packet to a serial interface according to the distribution proportion.

Optionally, the calculating the allocation ratio of the video data packets to the audio data packets includes:

inquiring packet sizes of the video data packet and the audio data packet;

and setting the distribution proportion according to the size proportion between the packet sizes.

Optionally, the sending the video data packet and the audio data packet to a serial interface includes:

and if the packed video data packet or the packed audio data packet is detected, sending the packed video data packet or the packed audio data packet to a serial interface.

Optionally, the serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface includes:

the video data packet and the audio data packet are serially sent to a protocol converter through the serial interface so as to carry out protocol conversion of video networking on the video data packet and the audio data packet;

and sending the video data packet and the audio data packet after protocol conversion to a video networking terminal through the protocol converter.

According to another aspect of the present invention, there is provided an apparatus for transmitting an analog signal, including:

the analog signal receiving module is used for receiving one or more paths of analog video signals and one or more paths of analog audio signals;

the analog signal conversion module is used for converting the one-way or multi-way analog video signals into one-way or multi-way digital video signals and converting the one-way or multi-way analog audio signals into one-way or multi-way digital audio signals;

the digital signal packaging module is used for packaging each path of digital video signal into a video data packet and packaging each path of digital audio signal into an audio data packet;

the serial interface sending module is used for sending the video data packet and the audio data packet to a serial interface;

and the video networking terminal sending module is used for serially sending the video data packet and the audio data packet to a video networking terminal through the serial interface.

Optionally, the digital signal packing module includes:

the video acquisition equipment query submodule is used for querying video acquisition equipment for acquiring the analog video signals corresponding to the digital video signals;

and the device identifier writing submodule is used for writing the device identifier of the video acquisition device into the video data packet.

Optionally, the serial interface sending module includes:

the distribution ratio calculation submodule is used for calculating the distribution ratio of the video data packet and the audio data packet;

and the distribution proportion sending submodule is used for sending the video data packet and the audio data packet to a serial interface according to the distribution proportion.

Optionally, the distribution ratio calculation sub-module includes:

a packet size inquiry unit configured to inquire packet sizes of the video data packet and the audio data packet;

a distribution ratio setting unit for setting a distribution ratio in accordance with a size ratio between the packet sizes.

Optionally, the serial interface sending module includes:

and the completion sending submodule is used for sending the packed video data packet or the packed audio data packet to a serial interface if the packed video data packet or the packed audio data packet is detected.

Optionally, the video network terminal sending module includes:

the serial sending submodule is used for serially sending the video data packet and the audio data packet to a protocol converter through the serial interface so as to carry out protocol conversion of video networking on the video data packet and the audio data packet;

and the protocol converter sending submodule is used for sending the video data packet and the audio data packet after the protocol conversion to a video networking terminal through the protocol converter.

The embodiment of the invention has the following advantages:

in the embodiment of the invention, one or more paths of analog video signals are received, one or more paths of analog audio signals are converted into one or more paths of digital video signals, one or more paths of analog audio signals are converted into one or more paths of digital audio signals, each path of digital video signal is packaged into a video data packet, each path of digital audio signal is packaged into an audio data packet, the video data packet and the audio data packet are sent to a serial interface, the video data packet and the audio data packet are serially sent to a video networking terminal through the serial interface, and the video networking terminal is accessed into a video networking so as to realize long-distance transmission in the video networking without arranging a plurality of repeaters, thereby greatly reducing the cost and realizing the unified management of the analog video signals and the analog audio signals.

Drawings

FIG. 1 is a networking diagram of a video network, according to one embodiment of the invention;

FIG. 2 is a diagram illustrating a hardware architecture of a node server according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch according to an embodiment of the present invention;

fig. 4 is a schematic hardware structure diagram of an ethernet protocol conversion gateway according to an embodiment of the present invention;

FIG. 5 is a flow chart illustrating steps of a method for transmitting an analog signal according to an embodiment of the present invention;

fig. 6 is a block diagram of an analog signal transmission apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like on a system platform on a network platform, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

network Technology (Network Technology)

Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network circuit Switching (circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.

Switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time exchange platform, can realize the real-time transmission of the whole-network large-scale high-definition video which cannot be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on the video networking and unified video platform is different from the traditional server, the streaming media transmission of the video networking and unified video platform is established on the basis of connection orientation, the data processing capacity of the video networking and unified video platform is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of video networking and unified video platform streaming media processing is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

The super-high speed storage technology of the unified video platform adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is directly sent to the user terminal instantly, and the general waiting time of the user is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

Network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

The unified video platform integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video platform to obtain various multimedia video services in various forms. The unified video platform adopts a menu type configuration table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes infinite new service innovation.

Networking of the video network is as follows:

the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

The access network part can form a unified video platform (the part in the dotted circle), and a plurality of unified video platforms can form a video network; each unified video platform may be interconnected via metropolitan area and wide area video networking.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: servers, switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node servers, access switches (including ethernet gateways), terminals (including various set-top boxes, code boards, memories, etc.).

The specific hardware structure of each access network device is as follows:

a node server:

as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink protocol packet address table, an uplink protocol packet address table, and a data packet address table), and configuring the disk array module 204.

The access switch:

as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the data packet coming from the CPU module 204 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:

if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 208 is configured by the CPU module 204, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MACSA of the ethernet coordination gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

A terminal:

the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

DA

SA

Reserved

Payload

CRC

wherein:

the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various protocol packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

the reserved byte consists of 2 bytes;

the payload part has different lengths according to different types of datagrams, and is 64 bytes if the datagram is various types of protocol packets, and is 32+1024 or 1056 bytes if the datagram is a unicast packet, of course, the length is not limited to the above 2 types;

the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

DA

SA

Reserved

label (R)

Payload

CRC

Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Referring to fig. 5, a flowchart illustrating steps of a method for transmitting an analog signal according to an embodiment of the present invention may specifically include the following steps:

step 501, receiving one or more analog video signals and one or more analog audio signals.

In a surveillance or the like scenario, one or more video capture devices (e.g., cameras), one or more microphones are deployed at the venue.

Each camera collects one path of analog video signals, and each sound pick-up collects one path of analog audio signals.

For different models of video capture apparatuses, different types of analog video signals may be captured, for example, VGA (video graphics array), CVBS (composite video broadcast signal), CVS (composite video signal), and the like.

For different models of sound pickup, different types of analog audio signals, for example, MIC (microphone), Line _ in/out (Line in/out), and the like, can be collected.

Step 502, converting the one or more analog video signals into one or more digital video signals, and converting the one or more analog audio signals into one or more digital audio signals.

If an analog video signal is received, a video encoder may be invoked to convert the analog video signal to a corresponding digital video signal.

For example, calling TVP7002 converts a VGA signal into a YUV (Y denotes a luminance signal, C, V denotes a chrominance signal) signal, calling GM7150 converts a CVBS signal into a bt.656 signal, calling MS1858 converts a CVS signal into an HDMI (high definition Multimedia Interface) signal, and so on.

If an analog audio signal is received, an audio encoder may be invoked to convert the analog audio signal to a corresponding digital audio signal.

For example, the MIC signal, Line _ in/out signal, is converted into an I2S (Inter-IC Sound, integrated circuit built-in audio bus) signal.

Step 503, packaging each path of the digital video signal into a video data packet, and packaging each path of the digital audio signal into an audio data packet.

In a specific implementation, the digital video signals and the digital audio signals may be converged into one processing component, and each path of the digital video signals may be packed into a video data packet according to a fixed length or the like, and each path of the digital audio signals may be packed into an audio data packet according to a fixed length or the like.

It should be noted that, in the same place, video capture devices and microphones of the same type are mostly deployed, and therefore, the types of analog audio signals and analog audio signals are mostly the same, so that the types of digital video signals and digital audio signals are mostly the same, but the types of video capture devices and microphones deployed in different places may be different, so that the types of analog audio signals and analog audio signals are different, so that the types of digital video signals and digital audio signals are also different, and in order to receive digital video signals and digital audio signals of different types, IP cores (Intellectual Property cores) corresponding to different types of digital video signals and digital audio signals are burned in the processing component.

For example, the processor may be an FPGA (Field-Programmable Gate Array), which burns an IP core of a digital video signal such as a YUV signal, a bt.656 signal, an HDMI signal, and the like so as to receive the digital video signal such as the YUV signal, the bt.656 signal, the HDMI signal, and the like, and burns an IP core of a digital audio signal such as an I2S signal so as to receive the digital audio signal such as the I2S signal.

In one embodiment of the present invention, step 503 may include the following sub-steps:

and a substep S11 of querying a video capture device for capturing an analog video signal corresponding to the digital video signal.

And a substep S12 of writing the device identification of the video capture device into a video data packet.

In the embodiment of the present invention, in order to distinguish different digital video signals when the other end of the transmission receives a video data packet, a video capture device that captures an analog video signal corresponding to a digital video signal may be distinguished, and a device identifier (such as a device ID) of the video capture device is written in the video data packet obtained by packaging the digital video signal.

It should be noted that, besides the device identifier, other configuration information, such as encoding parameters, etc., may be written in the video data packet, and the embodiment of the present invention is not limited thereto.

Step 504, sending the video data packet and the audio data packet to a serial interface.

For the packetized video and audio packets, the processing component may send them to a serial interface, such as a SerDes (serializer/deserializer).

In one embodiment of the invention, step 504 may include the following sub-steps:

and a substep S21 of calculating the distribution ratio of the video data packet to the audio data packet.

And a substep S22, sending the video data packet and the audio data packet to a serial interface according to the distribution ratio.

In the embodiment of the invention, the packed video data packet and audio data packet can be written into the corresponding task queue, the distribution ratio of the video data packet and the audio data packet is calculated according to a set mode, the video data packet and the audio data packet are extracted from the task queue according to the distribution ratio, and the video data packet and the audio data packet are sent to the serial interface.

In one example, the packet sizes of the video data packets and the audio data packets are queried, and the allocation ratio is set according to the size ratio between the packet sizes.

For example, the packet size of the 720P video data packet is about 0.25M, and the packet size of the 1080P video data packet is about 1M, and the allocation ratio of the 720P video data packet to the 1080P video data packet is 4: 1.

In another example, the video data packets and the audio data packets are distributed in the same proportion, i.e., the video data packets and the audio data packets are transmitted in turn.

Of course, the manner of calculating the distribution ratio is only an example, and when the embodiment of the present invention is implemented, other manners of calculating the distribution ratio may be set according to actual situations, and the embodiment of the present invention is not limited to this. In addition, besides the above way of calculating the distribution ratio, a person skilled in the art may also adopt other ways of calculating the distribution ratio according to actual needs, and the embodiment of the present invention is not limited to this.

In another embodiment of the present invention, if a packed video data packet or audio data packet is detected, the packed video data packet or audio data packet is sent to the serial interface.

In the embodiment of the invention, the task queue can be polled, and if a packaged video data packet or audio data packet is detected, the video data packet or the audio data packet is immediately sent to the serial interface.

And 505, serially transmitting the video data packet and the audio data packet to a video networking terminal through the serial interface.

In specific implementation, the video data packet and the audio data packet can be sent to the video networking terminal in a serial mode through the serial interface, and the video networking terminal can remotely transmit the video data packet and the audio data packet in the video networking.

In one case, the video network terminal transmits the video data packet and the audio data packet to the video network server, and the video network server transmits the video data packet and the audio data packet to another video network terminal for playing according to a downlink communication link configured for the other video network terminal.

In another case, the video network terminal transmits the video data packet and the audio data packet to the video network server, and the video network server sends the video data packet and the audio data packet to the monitoring management platform to realize monitoring management.

In another case, the video network terminal transmits the video data packet and the audio data packet to the video network server, the video network server transmits the video data packet and the audio data packet to the protocol conversion server, and the video network server transmits the video data packet and the audio data packet to the recording and broadcasting server located in the IP network after the video network is converted into the IP network, so that the on-demand service is realized.

In one embodiment of the present invention, step 505 may comprise the sub-steps of:

and a substep S31, serially transmitting the video data packet and the audio data packet to a protocol converter through the serial interface, so as to perform protocol conversion of video networking on the video data packet and the audio data packet.

And a substep S32, sending the video data packet and the audio data packet after the protocol conversion to the video networking terminal through the protocol converter.

In the embodiment of the present invention, in order to enable the video data packet and the audio data packet to be transmitted in the video network, the pass through interface first serially transmits the video data packet and the audio data packet to the Protocol converter, and the Protocol converter performs Protocol conversion from an IP (Internet Protocol, a Protocol for interconnection between networks) network to the video network on the video data packet and the audio data packet.

And then, the protocol conversion is carried out to send the video data packet and the audio data packet after the protocol conversion to the video networking terminal, and the video networking terminal transmits the video data packet and the audio data packet in the video networking.

Further, for video data packets, they may be encapsulated for transmission in the video network by the 2000 specification of the following video networking protocol:

for audio packets, they may be encapsulated for transmission in the video network by the 2001 specification of the video networking protocol as follows:

in the transmission process of the video network, the video network is a network with a centralized control function and comprises a master control server and a lower-level network device, wherein the lower-level network device comprises a terminal, one of the core concepts of the video network is that a table is configured for a downlink communication link of a current service by informing a switching device by the master control server, and then a data packet is transmitted based on the configured table.

Namely, the communication method in the video network includes:

and the master control server configures the downlink communication link of the current service.

And transmitting the data packet of the current service sent by the source terminal to a target terminal (such as another video network terminal) according to the downlink communication link.

In the embodiment of the present invention, configuring the downlink communication link of the current service includes: and informing the switching equipment related to the downlink communication link of the current service to allocate the table.

Further, transmitting according to the downlink communication link includes: the configured table is consulted, and the switching equipment transmits the received data packet through the corresponding port.

In particular implementations, the services include unicast communication services and multicast communication services. Namely, whether multicast communication or unicast communication, the core concept of the table matching-table can be adopted to realize communication in the video network.

As mentioned above, the video network includes an access network portion, in which the master server is a node server and the lower-level network devices include an access switch and a terminal.

For the unicast communication service in the access network, the step of configuring the downlink communication link of the current service by the master server may include the following steps:

and a substep S41, the main control server obtains the downlink communication link information of the current service according to the service request protocol packet initiated by the source terminal, wherein the downlink communication link information includes the downlink communication port information of the main control server and the access switch participating in the current service.

In the substep S42, the main control server sets a downlink port to which a packet of the current service is directed in a packet address table inside the main control server according to the downlink communication port information of the control server; and sending a port configuration command to the corresponding access switch according to the downlink communication port information of the access switch.

In sub-step S43, the access switch sets the downstream port to which the packet of the current service is directed in its internal packet address table according to the port configuration command.

For the multicast communication service in the access network, the step of the master server obtaining the downlink communication link information of the current service may include the following sub-steps:

in sub-step S51, the main control server obtains a service request protocol packet initiated by the target terminal and applying for the multicast communication service, where the service request protocol packet includes service type information, service content information, and an access network address of the target terminal.

Wherein, the service content information includes a service number.

And a substep S52, the main control server extracts the access network address of the source terminal in a preset content-address mapping table according to the service number.

In the substep of S53, the main control server obtains the multicast address corresponding to the source terminal and distributes the multicast address to the target terminal; and acquiring the communication link information of the current multicast service according to the service type information and the access network addresses of the source terminal and the target terminal.

In the embodiment of the invention, one or more paths of analog video signals are received, one or more paths of analog audio signals are converted into one or more paths of digital video signals, one or more paths of analog audio signals are converted into one or more paths of digital audio signals, each path of digital video signal is packaged into a video data packet, each path of digital audio signal is packaged into an audio data packet, the video data packet and the audio data packet are sent to a serial interface, the video data packet and the audio data packet are serially sent to a video networking terminal through the serial interface, and the video networking terminal is accessed into a video networking so as to realize long-distance transmission in the video networking without arranging a plurality of repeaters, thereby greatly reducing the cost and realizing the unified management of the analog video signals and the analog audio signals.

It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.

Referring to fig. 6, a block diagram of a structure of an analog signal transmission apparatus according to an embodiment of the present invention is shown, which may specifically include the following modules:

the analog signal receiving module 601 is configured to receive one or more analog video signals and one or more analog audio signals;

an analog signal conversion module 602, configured to convert the one or more paths of analog video signals into one or more paths of digital video signals, and convert the one or more paths of analog audio signals into one or more paths of digital audio signals;

a digital signal packing module 603, configured to pack each channel of digital video signal into a video data packet, and pack each channel of digital audio signal into an audio data packet;

a serial interface sending module 604, configured to send the video data packet and the audio data packet to a serial interface;

a video networking terminal sending module 605, configured to send the video data packet and the audio data packet to a video networking terminal in series through the serial interface.

In one embodiment of the present invention, the digital signal packing module 603 includes:

the video acquisition equipment query submodule is used for querying video acquisition equipment for acquiring the analog video signals corresponding to the digital video signals;

and the device identifier writing submodule is used for writing the device identifier of the video acquisition device into the video data packet.

In an embodiment of the present invention, the serial interface transmitting module 604 includes:

the distribution ratio calculation submodule is used for calculating the distribution ratio of the video data packet and the audio data packet;

and the distribution proportion sending submodule is used for sending the video data packet and the audio data packet to a serial interface according to the distribution proportion.

In one example of the embodiment of the present invention, the distribution ratio calculation sub-module includes:

a packet size inquiry unit configured to inquire packet sizes of the video data packet and the audio data packet;

a distribution ratio setting unit for setting a distribution ratio in accordance with a size ratio between the packet sizes.

In an embodiment of the present invention, the serial interface transmitting module 604 includes:

and the completion sending submodule is used for sending the packed video data packet or the packed audio data packet to a serial interface if the packed video data packet or the packed audio data packet is detected.

In an embodiment of the present invention, the video network terminal sending module 605 includes:

the serial sending submodule is used for serially sending the video data packet and the audio data packet to a protocol converter through the serial interface so as to carry out protocol conversion of video networking on the video data packet and the audio data packet;

and the protocol converter sending submodule is used for sending the video data packet and the audio data packet after the protocol conversion to a video networking terminal through the protocol converter.

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

In the embodiment of the invention, one or more paths of analog video signals are received, one or more paths of analog audio signals are converted into one or more paths of digital video signals, one or more paths of analog audio signals are converted into one or more paths of digital audio signals, each path of digital video signal is packaged into a video data packet, each path of digital audio signal is packaged into an audio data packet, the video data packet and the audio data packet are sent to a serial interface, the video data packet and the audio data packet are serially sent to a video networking terminal through the serial interface, and the video networking terminal is accessed into a video networking so as to realize long-distance transmission in the video networking without arranging a plurality of repeaters, thereby greatly reducing the cost and realizing the unified management of the analog video signals and the analog audio signals.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The above detailed description is provided for the method and apparatus for transmitting analog signals, and the principle and implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.