System, method and computer program product for security control of 4K video and audio streams

文档序号:1342032 发布日期:2020-07-17 浏览:21次 中文

阅读说明:本技术 4k视音频流的安全控制系统、方法及计算机程序产品 (System, method and computer program product for security control of 4K video and audio streams ) 是由 宋蔚 商同 陈策明 刘晶晶 张娟 王汗青 陶铮 丁研 刘庆雨 杨頔 谷旭源 许 于 2019-01-09 设计创作,主要内容包括:本发明实施例中提供了一种4K视音频流的安全控制系统、方法及计算机程序产品,实现了对4K视音频流播放安全性的控制。本发明实施例中的4K视音频流的安全控制系统,包括:系统调度中心,用于配置4K视音频流的属性信息;交换机设备,用于根据所述4K视音频流的属性信息,按照指定的分发策略调度4K视音频流至指定终端设备;终端设备,用于接收所述4K视音频流以及确定所述4K视音频流携带的属性信息是否符合预设授权属性参数。(The embodiment of the invention provides a safety control system, a safety control method and a computer program product of a 4K video-audio stream, which realize the control on the playing safety of the 4K video-audio stream. The safety control system of the 4K video and audio stream in the embodiment of the invention comprises: the system scheduling center is used for configuring the attribute information of the 4K video and audio stream; the switch equipment is used for scheduling the 4K video and audio streams to the appointed terminal equipment according to the attribute information of the 4K video and audio streams and the appointed distribution strategy; and the terminal equipment is used for receiving the 4K video and audio stream and determining whether the attribute information carried by the 4K video and audio stream meets the preset authorization attribute parameters.)

1. A security control system for 4K video and audio streams, comprising:

the system scheduling center is used for configuring the attribute information of the 4K video and audio stream;

the switch equipment is used for scheduling the 4K video and audio streams to the appointed terminal equipment according to the attribute information of the 4K video and audio streams and the appointed distribution strategy;

and the terminal equipment is used for receiving the 4K video and audio stream and determining whether the attribute information carried by the 4K video and audio stream meets the preset authorization attribute parameters.

2. The system of claim 1, wherein the system dispatch center is specifically configured to: configuring signal attribute, transceiving attribute and 4K stream attribute of the 4K video and audio stream; and the number of the first and second groups,

configuring a distribution strategy of the 4K video and audio stream;

and configuring preset authorization attribute parameters of the terminal equipment.

3. The system of claim 2, wherein the switch device is specifically configured to:

reading 4K stream attributes of the 4K video and audio streams;

determining the appointed terminal equipment corresponding to the 4K video and audio stream according to the 4K stream attribute; the appointed terminal equipment comprises border gateway equipment, backbone switch equipment, terminal equipment and non-attribution equipment;

and sending the 4K video and audio stream to the specified terminal equipment.

4. A security control method for 4K video and audio streams is characterized by comprising the following steps:

acquiring attribute information of a 4K video and audio stream to be transmitted;

according to the attribute information of the 4K video-audio stream to be transmitted, scheduling the 4K video-audio stream to a specified terminal device according to a specified distribution strategy;

and after receiving the 4K video and audio stream, the appointed terminal equipment determines whether the attribute information carried by the 4K video and audio stream conforms to a preset authorization attribute parameter.

5. The method according to claim 4, wherein before the obtaining of the attribute information of the 4K video-audio stream, the method further comprises:

configuring attribute information for each 4K video and audio stream; the attribute information includes a signal attribute, a transceiving attribute, and a 4K stream attribute.

6. The method according to claim 5, wherein the scheduling 4K video and audio streams to a specific terminal device according to a specific distribution policy according to the attribute information of the 4K video and audio streams to be transmitted comprises:

reading the signal attribute in the attribute information of the 4K video and audio stream;

and when the 4K signal attribute accords with one data in the specified signal list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy.

7. The method according to claim 5, wherein the scheduling 4K video and audio streams to a specific terminal device according to a specific distribution policy according to the attribute information of the 4K video and audio streams to be transmitted comprises:

reading the 4K stream attribute in the attribute information of the 4K video and audio stream;

and when the 4K stream attribute accords with a group of data in the specified stream attribute list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy.

8. The method of claim 7, wherein scheduling the 4K video and audio streams to a specific terminal device according to a specific distribution policy comprises:

determining parameters of appointed terminal equipment according to the 4K stream attributes;

and scheduling the 4K video and audio stream to the appointed terminal equipment according to the appointed equipment parameter.

9. The method according to claim 4, wherein the determining whether the attribute information carried by the 4K video/audio stream conforms to a preset authorized attribute parameter includes:

reading 4K stream attributes of the 4K video and audio streams;

and determining whether the 4K stream attribute accords with any data in preset authorization attribute parameters.

10. A computer program product directly loadable into the internal memory of a computer and containing software code, which when loaded and executed by the computer is able to carry out the method according to any of claims 4 to 9.

Technical Field

The present application relates to the field of video playing, and in particular, to a system, a method, and a computer program product for controlling security of 4K video/audio streams.

Background

Disclosure of Invention

The embodiment of the application provides a safety control system, a method and a computer program product of a 4K video-audio stream, which realize the control of the playing safety of the 4K video-audio stream.

In a first aspect, an embodiment of the present invention provides a system for controlling security of a 4K video/audio stream, including:

the system scheduling center is used for configuring the attribute information of the 4K video and audio stream;

the switch equipment is used for scheduling the 4K video and audio streams to the appointed terminal equipment according to the attribute information of the 4K video and audio streams and the appointed distribution strategy;

and the terminal equipment is used for receiving the 4K video and audio stream and determining whether the attribute information carried by the 4K video and audio stream meets the preset authorization attribute parameters.

The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the system scheduling center is specifically configured to: configuring signal attribute, transceiving attribute and 4K stream attribute of the 4K video and audio stream; and the number of the first and second groups,

configuring a distribution strategy of the 4K video and audio stream;

and configuring preset authorization attribute parameters of the terminal equipment.

The above-described aspect and any possible implementation further provide an implementation, where the switch device is specifically configured to:

reading 4K stream attributes of the 4K video and audio streams;

determining the appointed terminal equipment corresponding to the 4K video and audio stream according to the 4K stream attribute; the appointed terminal equipment comprises border gateway equipment, backbone switch equipment, terminal equipment and non-attribution equipment;

and sending the 4K video and audio stream to the specified terminal equipment.

In a second aspect, an embodiment of the present invention further provides a method for controlling security of a 4K video/audio stream, including:

acquiring attribute information of a 4K video and audio stream to be transmitted;

according to the attribute information of the 4K video-audio stream to be transmitted, scheduling the 4K video-audio stream to a specified terminal device according to a specified distribution strategy;

and after receiving the 4K video and audio stream, the appointed terminal equipment determines whether the attribute information carried by the 4K video and audio stream conforms to a preset authorization attribute parameter.

The above-described aspect and any possible implementation manner further provide an implementation manner, before obtaining the attribute information of the 4K video-audio stream, the method further includes:

configuring attribute information for each 4K video and audio stream; the attribute information includes a signal attribute, a transceiving attribute, and a 4K stream attribute.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the scheduling, according to the attribute information of the to-be-transmitted 4K video-audio stream, the 4K video-audio stream to a specific terminal device according to a specific distribution policy includes:

reading the signal attribute in the attribute information of the 4K video and audio stream;

and when the 4K signal attribute accords with one data in the specified signal list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the scheduling, according to the attribute information of the to-be-transmitted 4K video-audio stream, the 4K video-audio stream to a specific terminal device according to a specific distribution policy includes:

reading the 4K stream attribute in the attribute information of the 4K video and audio stream;

and when the 4K stream attribute accords with a group of data in the specified stream attribute list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where scheduling 4K video and audio streams to a specific terminal device according to a specific distribution policy includes:

determining parameters of appointed terminal equipment according to the 4K stream attributes;

and scheduling the 4K video and audio stream to the appointed terminal equipment according to the appointed equipment parameter.

The foregoing aspect and any possible implementation manner further provide an implementation manner, where the determining whether the attribute information carried in the 4K video and audio stream conforms to a preset authorized attribute parameter includes:

reading 4K stream attributes of the 4K video and audio streams;

and determining whether the 4K stream attribute accords with any data in preset authorization attribute parameters.

In a third aspect, an embodiment of the present invention further provides a computer program product, which is directly loadable into an internal memory of a computer and contains software codes, and which, when loaded and executed by the computer, is capable of implementing the method according to any of the second aspects.

In the system, the method and the computer program product for controlling the security of the 4K video and audio streams provided by the embodiment of the invention, the system scheduling center configures the attribute information for each 4K video and audio stream, then the switch device schedules the 4K video and audio streams to the specified terminal device according to the configured attribute information of the 4K video and audio streams and the specified distribution strategy, so that after the specified terminal device receives the 4K video and audio streams, whether the attribute information carried by the 4K video and audio streams meets the preset authorized attribute parameters is further determined, from the whole process, the 4K video and audio streams which do not meet the configured attribute information cannot enter the system for scheduling, the security of a first level is ensured, the 4K video and audio streams which enter the terminal device can be played only by further verification, and the playing security is further ensured, the problem of lack of the solution to the security problem of 4K ultra high definition IP audio and video stream among the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a security control system for 4K video/audio streams according to an embodiment of the present invention;

fig. 2 is a flowchart of a security control method for 4K video/audio streams according to an embodiment of the present invention;

fig. 3 is another flowchart of a security control method for 4K video/audio streams according to an embodiment of the present invention;

fig. 4 is another flowchart of a security control method for 4K video/audio streams according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The 4K ultra high definition video has the characteristic of high definition, the requirement on the frame precision control of hardware is very high, and the network devices of different manufacturers, such as switch devices, terminal devices and the like, have different used attribute information contents, so that when a television station plays the 4K ultra high definition video, the television station needs to be controlled respectively according to the characteristics of the network devices of different manufacturers.

At present, the 4K ultra-high definition uncompressed audio/video signal is packaged according to the standard and consists of 4 signals, which are respectively as follows: 1-channel video signal, 2-channel audio signal (channels 1-16, functional channel control), 1-channel data signal (signal metadata and control data). In the transmission process, the requirement on transmission quality is high, for example, the code rate of one 4K4K video and audio stream is 12Gbps/s high bandwidth, no compression is performed, no packet loss transmission is performed, the delay requirement is no blocking, the faults of each link are within 20ms, and no frame loss occurs during IP signal switching.

Besides, the 4K ultra high definition video/audio stream is important to guarantee the transmission quality, and the security of the 4K ultra high definition video/audio stream is also important. For example, an IP signal in terminal, an IP signal transmission terminal, a receiving site and a transmitting site, and a signal source must authorize a licensor for a broadcasting part to access and broadcast. However, in the prior art, no relevant development is made on the IP signal safety.

Accordingly, embodiments of the present invention provide a security control system for 4K video/audio streams, which aims to improve the security of IP signals. Specifically, fig. 1 is a schematic structural diagram of a security control system for a 4K video/audio stream according to an embodiment of the present invention, and as shown in fig. 1, the security control system for a 4K video/audio stream according to an embodiment of the present invention may specifically include: the system comprises a system dispatching center 1, a switch device 2 and a terminal device 3.

The system scheduling center 1 is used for configuring attribute information of the 4K video and audio streams; the switch equipment 2 is used for scheduling the 4K video and audio streams to the appointed terminal equipment according to the attribute information of the 4K video and audio streams and the appointed distribution strategy; and the terminal device 3 is used for receiving the 4K video and audio stream and determining whether the attribute information carried by the 4K video and audio stream meets the preset authorization attribute parameters.

Specifically, the system scheduling center 1 is specifically configured to: configuring signal attribute, transceiving attribute and 4K stream attribute of the 4K video and audio stream; configuring a distribution strategy of the 4K video and audio stream; and configuring preset authorization attribute parameters of the terminal equipment. The signal attribute comprises a signal ID, an audio signal channel 1, an audio signal channel 2, a data channel and other channels; the signal ID comprises a 4K 1.2G video signal ID (IP/IP section), a 4K 1.5G video signal ID (IP/IP section), and a non-4K signal ID; audio signal channel 1 comprises 4K audio signal channels 1-8ID (IP/IP segment); the audio signal channel 2 includes 4K audio signal channels 9-16ID (IP/IP segment); the data channel includes 4K auxiliary data ID (IP/IP segment); other channels include 4K audio signals other IDs (IP/IP segments), etc.

The transmission/reception attribute includes a reception ID and a transmission ID.

The 4K stream attributes include a 4K stream name ID, a 4K stream alias ID, an associated 4K signal stream name ID, an associated 4K signal attribute parameter, an associated physical device attribute parameter, an associated transceiving attribute parameter, and a stream state attribute parameter.

Configuring a distribution strategy of the 4K video and audio stream, which may specifically include: physical device attribute parameters; device name, device type, physical port number, border gateway device ID, backbone switch device ID, terminal device ID, no-home device ID, etc.

By configuring attribute information for each 4K video and audio stream in a system scheduling center and performing different scheduling according to the attribute information configured for the 4K video and audio streams, the 4K video and audio streams can be scheduled to specified physical equipment when entering a system, and the scheduled running equipment is mainly switch equipment, specifically, the switch equipment is used for: reading 4K stream attributes of the 4K video and audio streams; determining the appointed terminal equipment corresponding to the 4K video and audio stream according to the 4K stream attribute; the appointed terminal equipment comprises border gateway equipment, backbone switch equipment, non-attribution equipment and terminal equipment; and sending the 4K video and audio stream to the specified terminal equipment. It can be understood that, in the embodiment of the present invention, the specified terminal device corresponding to the 4K video/audio stream is determined to be one of a border gateway device, a backbone switch device, a non-home device, and a terminal device according to the 4K stream attribute. It should be noted that, in the embodiment of the present invention, the hardware device often cannot execute a general control instruction due to product differences produced by different manufacturers, in which case, third-party signal terminal control software is required to control the device, that is, control the non-attributive device.

It can be understood that only the 4K video/audio stream that conforms to the attribute information of the configured 4K video/audio stream can enter the system, and the video/audio stream that does not conform to the configuration information cannot enter the switch device. Next, the switch device will schedule the 4K video and audio streams to the designated terminals according to the designated distribution policy.

And, in order to save system resources, the system can identify and control the 4K video and audio streams in the activated state. Whether the video stream is in the activated state or not can be determined by attribute information of the 4K video and audio streams, and particularly can be determined by a stream state attribute in the 4K stream attributes.

After receiving the 4K video/audio stream, the terminal device needs to determine whether the attribute information carried by the 4K video/audio stream meets the preset authorization attribute parameter. It can be understood that the preset authorization attribute parameter is also configured in the system scheduling center, and the preset authorization attribute parameter may include a designated IP signal, that is, an IP signal that can be sent and received, an IP signal that is prohibited from being sent and received, and the like.

The safety control system of the 4K video and audio stream provided by the embodiment of the invention configures attribute information for each 4K video and audio stream through the system scheduling center, then the switch device dispatches the 4K video and audio stream to the appointed terminal device according to the configured attribute information of the 4K video and audio stream and the appointed distribution strategy, after the appointed terminal equipment receives the 4K video-audio stream, whether the attribute information carried by the 4K video-audio stream accords with the preset authorized attribute parameter or not is further determined, and the 4K video-audio stream which does not accord with the configured attribute information can not enter the system to be scheduled in the whole process, so that the safety of a first level is guaranteed, the 4K video-audio stream which enters the terminal equipment can be played only by further verification, the playing safety is further guaranteed, and the problem that a solution for the safety problem of the 4K ultra-high definition IP video-audio stream is lacked in the prior art is solved.

Further, in combination with the foregoing security control system for 4K video and audio streams, an embodiment of the present invention further provides a security control method for 4K video and audio streams, specifically, fig. 2 is a flowchart of the security control method for 4K video and audio streams provided in the embodiment of the present invention, and as shown in fig. 2, the security control method for 4K video and audio streams provided in the embodiment of the present invention may specifically include the following steps:

101. and acquiring attribute information of the 4K video and audio stream to be transmitted.

It should be noted that each to-be-transmitted 4K video/audio stream in the embodiment of the present invention carries some attribute information, for example, IP information, a video/audio name, a video/audio size, and the like. When a 4K video/audio stream to be transmitted enters a system, in order to determine whether the 4K video/audio stream to be transmitted is safe, the attribute information needs to be authenticated first.

102. And scheduling the 4K video and audio streams to the appointed terminal equipment according to the appointed distribution strategy according to the attribute information of the 4K video and audio streams to be transmitted.

According to the system content, when the attribute information carried by the 4K video-audio stream to be transmitted does not conform to the attribute information of the pre-configured 4K video-audio stream, the 4K video-audio stream to be transmitted cannot enter the system. And only the 4K video and audio stream which meets the attribute information of the pre-configured 4K video and audio stream can be dispatched to the appointed terminal equipment according to the appointed distribution strategy. In the scheduling process, the 4K video and audio streams may be scheduled to devices such as a border gateway device, a backbone switch device, a terminal device, or a non-home device according to a preset distribution policy.

In a specific implementation process, the signal attribute in the attribute information of the 4K video/audio stream may be specifically read; and when the 4K signal attribute accords with one data in the specified signal list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy.

In another specific implementation process, it may also be specifically configured to read a 4K stream attribute in the attribute information of the 4K video/audio stream; and when the 4K stream attribute accords with a group of data in the specified stream attribute list, scheduling the 4K video and audio stream to the specified terminal equipment according to the specified distribution strategy. The scheduling of the 4K video and audio streams to the specified terminal device according to the specified distribution policy may specifically include: determining parameters of the appointed terminal equipment according to the 4K stream attributes; and scheduling the 4K video and audio stream to the appointed terminal equipment according to the appointed equipment parameter.

103. And after the appointed terminal equipment receives the 4K video and audio stream, determining whether the attribute information carried by the 4K video and audio stream conforms to the preset authorization attribute parameter.

In another specific implementation process, it may specifically be to read a 4K stream attribute of a 4K video/audio stream; it is determined whether the 4K stream attribute conforms to any one of the preset authorization attribute parameters.

It can be understood that the system scheduling center in the system configures attribute information for each node device, and aims to control 4K video and audio streams layer by layer to achieve ordered and safe scheduling.

Since most of the attribute information of the secure 4K video/audio stream is configured in advance when the system runs, in the embodiment of the present invention, a method for controlling security of the 4K video/audio stream is further provided, specifically, fig. 3 is another flowchart of the method for controlling security of the 4K video/audio stream provided by the embodiment of the present invention, as shown in fig. 3, before step 101, the following steps may also be included:

100. attribute information is configured for each 4K video-audio stream.

In the embodiment of the present invention, the attribute information includes a signal attribute, a transceiving attribute, and a 4K stream attribute. Specific configurations can be found in the foregoing description.

Fig. 4 is another flowchart of a security control method for 4K video and audio streams according to an embodiment of the present invention, as shown in fig. 4, which is a specific process provided in the embodiment of the present invention for configuring attribute information for each 4K video and audio stream, it should be noted that fig. 4 is only an exemplary illustration, and is not a unique configuration sequence in this application.

In order to better explain the method flow in the embodiment of the present invention, the following description is made with reference to a specific usage scenario:

1. configuring attribute information of 4K video and audio stream

4K stream name ID: 12G-channel 1-4K signal

Signal properties: video signal channel 239.1.0.1, audio signal channels 1-239.2.0.1, audio signal channels 2-239.3.0.2, data channel 239.4.0.1

The receiving and sending properties are as follows: receiving an ID: 12G-channel 1-receive, Attribute: receiving

Physical device attribute parameters: the device name: 12G-channels 1-4K signal-transmission source, terminal device ID: 10.0.0.1/32, device type: 1 is effective

4K stream attributes: 4K stream name ID: 4K-channel 1, associated 4K signal attribute parameters: 12G-channel 1-4k signals, associated transceiving attribute parameters: 12G-channel 1-receive, associated physical device attribute parameters: 12G-channels 1-4k signal-transmission source, stream state attribute parameters: 1-start to

Application position: border gateway

2. Reading attribute information of 4K video and audio stream

Reading a stream state attribute parameter in attribute information as 1, setting an application position as a border gateway, starting a distribution strategy, packaging a 4K video and audio stream according to a format of the border gateway, sending the 4K video and audio stream to an interface corresponding to the border gateway, judging whether a terminal equipment ID is 10.0.0.1 or not after the border gateway receives data, and if so, enabling data of a video signal channel 239.1.0.1, audio signal channels 1-239.2.0.1, audio signal channels 2-239.3.0.2 and a data channel 239.4.0.1 to enter.

The safety control method of the 4K video and audio stream provided by the embodiment of the invention obtains the attribute information of the 4K video and audio stream to be transmitted, then, according to the attribute information of the 4K video-audio stream, the 4K video-audio stream is dispatched to an appointed terminal device according to an appointed distribution strategy, after the appointed terminal device receives the 4K video-audio stream, whether the attribute information carried by the 4K video-audio stream meets preset authorized attribute parameters is determined, from the whole process, the 4K video-audio stream which does not meet the configuration attribute information cannot enter a system for dispatching, the security of a first level is guaranteed, the 4K video-audio stream which enters the terminal device can be played only by further verification, the playing security is further guaranteed, and the problem that a solution for the security problem of the 4K ultra-high definition IP video-audio stream is lacked in the prior art is solved.

In order to implement the method flows in the foregoing, embodiments of the present application further provide a computer program product, which can be directly loaded into an internal memory of a computer and contains software codes, and the computer program can be loaded into and executed by the computer to implement any of the methods in the foregoing.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those 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 alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

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