阅读说明：本技术 信号处理方法及系统 (Signal processing method and system ) 是由 赵捷珍 吴向兵 潘鸿天 于 2020-04-07 设计创作，主要内容包括：本发明实施例公开了一种信号处理方法及系统。所述方法包括：采用第一发送链路,向显示设备发送第一路视频信号；采用第二发送链路,向所述显示设备发送第二路视频信号,以使所述显示设备采用所述第一路视频信号或者所述第二路视频信号进行显示；其中,所述第一路视频信号和所述第二路视频信号通过至少一个解码器对获取的同源视频码流进行解码得到。采用本申请方案可保证在一条链路出现故障导致传输中断的情况下,可切换到另一条链路并迅速使用该条链路传输的视频信号,避免由于一条链路的数据传输中断导致显示设备上的上墙画面出现中断,同时能保证切换前的上墙画面与切换后的上墙画面保持一致,实现前后画面的无缝切换。(The embodiment of the invention discloses a signal processing method and a signal processing system. The method comprises the following steps: sending a first path of video signal to display equipment by adopting a first sending link; sending a second path of video signals to the display equipment by using a second sending link, so that the display equipment displays by using the first path of video signals or the second path of video signals; and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder. By adopting the scheme, the video signal transmitted by the link can be switched to the other link and rapidly used under the condition that the transmission is interrupted due to the fault of the link, the interruption of the wall painting on the display equipment caused by the interruption of the data transmission of the link is avoided, the wall painting before switching and the wall painting after switching can be kept consistent, and the seamless switching of the front and the rear pictures is realized.)

1. A signal processing method, comprising:

sending a first path of video signal to display equipment by adopting a first sending link;

sending a second path of video signals to the display equipment by using a second sending link, so that the display equipment displays by using the first path of video signals or the second path of video signals;

and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder.

2. The method of claim 1, wherein transmitting the first video signal to the display device using the first transmission link comprises:

transmitting, by a primary decoder, a first video signal to a primary transmission card;

and sending a second path of video signals to the display equipment by adopting a second sending link, wherein the second sending link comprises:

transmitting a second video signal to a master transmission card through a slave decoder so that the master transmission card transmits a first video signal or a second video signal to a master reception card configured in the display device;

the first video signal is obtained by decoding the acquired homologous video code stream through a main decoder and is sent out from the main decoder; the second video signal is obtained by decoding the acquired homologous video code stream from the slave decoder, and is sent out from the slave decoder.

3. The method of claim 1, wherein transmitting the first video signal to the display device using the first transmission link comprises:

transmitting a third video signal to a main receiving card configured in the display device through a main transmitting card;

and sending a second path of video signals to the display equipment by adopting a second sending link, wherein the second sending link comprises:

transmitting a fourth video signal to a slave receiving card configured in the display device by a slave transmitting card;

the third video signal is obtained by decoding the acquired homologous video code stream through a main decoder or a slave decoder and is sent out from the main sending card; and the fourth video signal is obtained by decoding the acquired homologous video code stream through a master decoder or a slave decoder and is sent out from the slave sending card.

4. The method according to claim 1, wherein the first video signal is transmitted synchronously with the second video signal.

5. The method according to claim 2 or 3, wherein the homologous video streams are video streams transmitted from the same source device obtained from a preset multicast group.

6. A method according to claim 2 or 3, characterized in that the method further comprises:

and synchronously decoding the homologous video code streams acquired by the main decoder and the slave decoder.

7. A method according to claim 2 or 3, characterized in that the method further comprises:

determining whether a code stream check value is packaged in the homologous video code stream or not from a decoder;

under the condition of determining the check value of the encapsulated code stream, determining whether the encapsulated code check value is a preset value or not from a decoder so as to check the legality of the acquired homologous video code stream;

and if the source video code stream is determined to be legal, decoding the acquired source video code stream through the slave decoder.

8. A signal processing system, comprising: a first processing device, a second processing device and a display device; wherein the content of the first and second substances,

the first processing device is configured to send a first video signal to the display device by using a first sending link;

the second processing device is configured to send a second channel of video signals to the display device by using a second sending link;

the display device is configured to display by using the first path of video signal or the second path of video signal;

and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder.

9. The system of claim 8, further comprising a master transmitter card and a slave transmitter card, the first processing device being a master decoder and the second processing device being a slave decoder;

the main decoder is configured to decode the obtained homologous video code stream to obtain the first video signal; and, in the event of obtaining a first video signal, sending said first video signal to a main transmission card;

the slave decoder is configured to decode the obtained homologous video code stream to obtain the second video signal; and, in the event of obtaining a second video signal, sending said second video signal to a main transmission card;

the main transmitting card is configured to transmit the first video signal or the second video signal to a main receiving card configured in the display device.

10. The system of claim 8, further comprising at least one decoding device, the first processing device being a master transmitter card and the second processing device being a slave transmitter card;

the at least one decoding device is configured to decode the obtained homologous video code stream and send the decoded video signals to the main sending card and the auxiliary sending card; wherein the at least one decoding device comprises a master decoder, or a master decoder and a slave decoder;

the main transmitting card is configured to select one path of video signal from the decoded video signals as a third video signal; and sending a third video signal to a main receiving card configured in the display device;

the slave sending card is specifically configured to select one video signal from the decoded video signals as a fourth video signal; and transmitting a fourth video signal to a slave receiving card configured in the display apparatus.

Technical Field

The embodiment of the invention relates to the technical field of signal processing, in particular to a signal processing method and system.

Background

At present, in a general monitoring system, a monitoring picture is on the wall, which is a commonly used scene. In a scene of monitoring a picture on the wall, a video signal is transmitted from a remote signal source to a large screen of a television wall, a long and complex transmission environment may be needed, and after long-distance transmission in the complex environment, a problem of transmission interruption of the video signal occurs in part of the signal, so that the picture on the large screen of the television wall is interrupted, at this time, the whole transmission process can only be reconfigured, and great inconvenience is brought to a monitoring service in the period.

Disclosure of Invention

The embodiment of the invention provides a signal processing method and a signal processing system, which are used for realizing seamless switching of monitoring pictures on a large screen of a television wall.

In a first aspect, an embodiment of the present invention provides a signal processing method, including:

sending a first path of video signal to display equipment by adopting a first sending link;

sending a second path of video signals to the display equipment by using a second sending link, so that the display equipment displays by using the first path of video signals or the second path of video signals;

and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder.

In a second aspect, an embodiment of the present invention further provides a signal processing system, including: a first processing device, a second processing device and a display device; wherein the content of the first and second substances,

the first processing device is configured to send a first video signal to the display device by using a first sending link;

the second processing device is configured to send a second channel of video signals to the display device by using a second sending link;

the display device is configured to display by using the first path of video signal or the second path of video signal;

and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder.

The embodiment of the invention provides a signal processing method, when a video signal sent by signal source equipment is displayed on the wall, a first path of video signal and a second path of video signal can be respectively sent to display equipment needing to be displayed on the wall through a first sending link and a second sending link, so that under the condition that one link breaks down to cause transmission interruption, the other link can be switched and the video signal transmitted by the link can be rapidly used, and the interruption of a top wall picture on the display equipment caused by the data transmission interruption of the one link is avoided; in addition, the first path of video signal and the second path of video signal come from the same source video code stream, and the first path of video signal and the second path of video signal sent to the display equipment can be ensured to be consistent, so that the on-wall picture before switching and the on-wall picture after switching can be ensured to be consistent, and seamless switching of the front picture and the back picture is realized.

The above summary of the present invention is merely an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description in order to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a flow chart of a signal processing method provided in an embodiment of the present invention;

fig. 2 is a conceptual diagram of a monitoring screen on a wall according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a multilink transmission video signal provided in an embodiment of the present invention;

fig. 4 is a flow chart of another signal processing method provided in an embodiment of the present invention;

FIG. 5 is a schematic diagram of another multilink transmission video signal provided in an embodiment of the present invention

Fig. 6 is a timing diagram of multicast transmission of a video stream according to an embodiment of the present invention;

fig. 7 is a timing diagram of multicast transmission of another video stream provided in the embodiment of the present invention;

fig. 8 is a flowchart of still another signal processing method provided in the embodiment of the present invention;

fig. 9 is a schematic diagram of a video signal for multilink transmission according to still another embodiment of the present invention;

fig. 10 is a block diagram of a signal processing system provided in an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.

Fig. 1 is a flowchart of a signal processing method provided in an embodiment of the present invention. The embodiment of the invention can be suitable for the condition of carrying out backup processing on the video signal, in particular to the condition of carrying out backup on the video signal sent by the signal source in an on-wall display scene. As shown in fig. 1, the signal processing method provided in the embodiment of the present invention may include the following steps S110 to S120:

s110, sending a first path of video signal to display equipment by adopting a first sending link; and the first path of video signal is obtained by decoding the acquired homologous video code stream through a decoder.

S120, sending the second path of video signals to the display equipment by adopting a second sending link so that the display equipment displays by adopting the first path of video signals or the second path of video signals; and the second path of video signal is obtained by decoding the acquired homologous video code stream through a decoder.

In this embodiment, fig. 2 is a conceptual diagram of monitoring a picture on the wall according to an embodiment of the present invention, taking a scene of monitoring the picture on the wall as an example, a monitoring signal source device that needs to be displayed on the wall may send a video stream to a decoder through a network, and the decoder decodes the video stream to obtain a video signal, and then performs on-wall display through an HDMI video signal. However, if the monitoring signal source device is interrupted when transmitting signals by using one link, the picture of the large screen of the television wall is interrupted. For this purpose, the number of transmission links of the video signal may be set on the basis of the upper wall display shown in fig. 2.

In this embodiment, fig. 3 is a schematic diagram of a multilink transmission video signal provided in an embodiment of the present invention. Referring to fig. 3, a first transmission link and a second transmission link may be set in front of the display device, and then the first path of video signal and the second path of video signal are simultaneously transmitted to the display device through the first transmission link and the second transmission link. By adopting the sending mode, the video signal can be quickly switched to the other link and transmitted by using the other link under the condition that the signal transmission of one link is interrupted, so that the problem of picture interruption of the display equipment is basically avoided.

In this embodiment, referring to fig. 3, the video code stream sent by the signal source device may be obtained by at least one decoder, and the homologous video code stream may refer to the video code stream sent by the same signal source device, where the signal source device may be a monitoring signal source device. The first path of video signal and the second path of video signal are both obtained by decoding the obtained homologous video code stream, i.e. the first path of video signal and the second path of video signal are ensured to have the same video code stream source. Optionally, the homologous video code stream is a video code stream sent by the same signal source device and acquired from a preset multicast group, and the signal source device can send the video code stream to the preset multicast group for subsequent decoders to acquire the video code stream sent by the same signal source device from the preset multicast group. By adopting the mode, when the display equipment switches the video signals transmitted by using the first transmission link and the second transmission link, the front-back difference does not occur on the on-wall display picture of the display equipment.

In this embodiment, referring to fig. 3, on the basis of the first transmission link and the second transmission link, the first channel of video signal may be transmitted to the display device through the first transmission link, and the second channel of video signal may be synchronously transmitted to the display device through the second transmission link, so that the first channel of video signal and the second channel of video signal are synchronously transmitted to the display device, respectively. By adopting the synchronous transmission mode, the display equipment can directly adopt the video signal transmitted by the other transmission link after the signal transmission interruption problem occurs in one link, and the phenomenon that the picture is interrupted briefly because the video signal needs to be waited after the link is switched is avoided.

In this embodiment, the display device may be an L ED video wall, and although the first video signal and the second video signal may be sent to the display device at the same time, the display device actually uses only one video signal, that is, the display device displays by using one of the first video signal and the second video signal.

The embodiment of the invention provides a signal processing method, which is characterized in that a first path of video signal and a second path of video signal are respectively sent to display equipment needing on-wall display through a first sending link and a second sending link, so that the video signal transmitted by one link can be switched to the other link and quickly used under the condition that the transmission of one link is interrupted due to the fault, and the interruption of an on-wall picture on the display equipment caused by the interruption of the data transmission of one link is avoided; in addition, the first path of video signal and the second path of video signal sent to the display equipment can be ensured to be consistent, so that the wall-mounted picture before switching and the wall-mounted picture after switching can be ensured to be consistent, and seamless switching of the front picture and the rear picture is realized.

Fig. 4 is a flow chart of another signal processing method provided in the embodiment of the present invention, which is further optimized based on the above embodiment, and the embodiment of the present invention may be combined with various alternatives in one or more of the above embodiments. As shown in fig. 4, the signal processing method provided in the embodiment of the present invention may include the following steps S410 to S440:

s410, receiving the homologous video code stream sent by the signal source equipment through the main decoder, decoding the obtained homologous video code stream through the main decoder, and taking the decoded video signal as a first video signal.

In this embodiment, fig. 5 is a schematic diagram of another multilink transmission video signal provided in the embodiment of the present invention. Referring to fig. 5, the signal source device may send the video code stream to a preset multicast group, so that each subsequent decoder may obtain the video code stream sent by the same signal source device from the preset multicast group. The first transmission link may include a main decoder, the main decoder may join the preset multicast group, and a video stream transmitted by a signal source device included in the preset multicast group may be acquired by the main decoder, and is recorded as a homologous video stream.

In an alternative example, fig. 6 is a timing diagram for multicast transmission of a video bitstream according to an embodiment of the present invention. Referring to fig. 6, the main decoder may register with the management platform, and after the registration, the management platform may negotiate with the main decoder about a receiving address of the video stream to obtain a multicast address and a port. The management platform can send the multicast address and the port to the signal source equipment, so that the signal source equipment can join a multicast group according to the negotiated multicast address and port and send the video code stream to the multicast group. In addition, the main decoder can join the multicast group according to the negotiated multicast address and port, and acquire the video code stream sent by the signal source device from the multicast group, so that the stream can be multicast to the main decoder through the multicast group.

And S420, receiving the homologous video code stream sent by the signal source equipment from the decoder, decoding the obtained homologous video code stream by the slave decoder, and taking the decoded video signal as a second video signal.

In this embodiment, referring to fig. 5, a slave decoder may be included on the second transmission link, and the slave decoder may also join the preset multicast group, and may obtain, through the slave decoder, the homologous video stream transmitted by the signal source device included in the preset multicast group. Referring to fig. 6, optionally, the master decoder may send the negotiated multicast address and port to the slave decoder, and on this basis, the slave decoder may join the multicast group according to the received multicast address and port as the master decoder, and obtain the video code stream sent by the signal source device from the multicast group, so that the video code streams received by the master decoder and the slave decoder are homologous video code streams, which is convenient for no difference between previous and subsequent pictures when pictures on the display device are switched, and thereby implementing real seamless switching.

In this embodiment, referring to fig. 5, after the master decoder and the slave decoder respectively receive the homologous video code streams sent by the signal source device from the preset multicast group, the master decoder and the slave decoder synchronously decode the homologous video code streams obtained by the master decoder and the slave decoder, so as to ensure that the decoding operation is synchronously completed and the video signals decoded by the slave decoders are synchronously sent to the display device.

In this embodiment, optionally, after receiving the homologous video code stream sent by the signal source device through the slave decoder, the slave decoder may perform validity check on the obtained homologous video code stream to verify whether the homologous video code stream needs to backup the video code stream that is synchronously transmitted; and if the video code stream is determined to be legal, continuing to perform decoding operation on the acquired homologous video code stream through the slave decoder. Optionally, the validity check of the homologous video code stream includes: whether the decoder receives the homologous video code stream and whether the homologous video code stream received from the decoder is a video code stream which needs to be backed up for synchronous transmission (for example, whether a code stream check value is packaged in the received homologous video code stream or whether the packaged code stream check value is correct).

In an alternative example, fig. 7 is a timing diagram for multicast transmission of another video stream provided in the embodiment of the present invention. Referring to fig. 7, in a case where the management platform and the master decoder negotiate to complete a multicast address and a port, a code stream check value may be generated and the code stream check value generated by itself may be distributed to the management platform and the slave decoder. Under the condition that the management platform and the signal source equipment negotiate to complete the multicast address and the port, the code stream check value received from the main decoder can be sent to the signal source equipment, so that the signal source equipment can package the code stream check value in a video code stream and send the video code stream. On the basis, the slave decoder can carry out validity check on the code stream check value packaged in the acquired homologous video code stream; if the code stream check value is packaged in the received homologous video code stream and the value of the code stream check value is correct, determining that the homologous video code stream is legal; otherwise, it is illegal.

And S430, transmitting the first video signal to a main transmitting card through a main decoder.

And S440, sending the second video signal to the main sending card through the slave decoder, so that the main sending card sends the first video signal or the second video signal to a main receiving card configured in the display device, and further the display device displays by adopting the first video signal or the second video signal.

In this embodiment, the first video signal may belong to a first channel of video signal, and the first video signal may be directly output from the main decoder and sent to the main transmitting card; and, the second video signal may belong to a second path of video signal, and the second video signal may be directly output from the slave decoder and transmitted to the master transmission card. Referring to fig. 5, the master decoder may transmit the resulting first video signal to the master transmission card, while the slave decoder may also transmit the resulting second video signal to the master transmission card. Optionally, the master transmitting card is provided with a plurality of homologous signal input ports, and the master transmitting card can simultaneously receive the first video signal sent by the master decoder and the second video signal sent by the slave decoder based on the plurality of homologous signal input ports. Under the condition that the main transmitting card receives the first video signal and the second video signal at the same time, the main transmitting card can transmit one path of video signal in the first video signal and the second video signal to the main receiving card configured in the display equipment according to the configuration information. Therefore, the first path of video signal and the second path of video signal can be synchronously sent to the display equipment by synchronously sending the first video signal and the second video signal.

In an alternative example, in a case where the priority of the master decoder is configured to be higher than that of the slave decoder in advance, if the master transmission card receives the first video signal and the second video signal at the same time, the master transmission card transmits the first video signal from the master decoder to the master reception card and does not transmit the second video signal from the slave decoder to the master reception card; when the main transmitting card does not receive the first video signal from the main decoder, the main transmitting card transmits the second video signal from the auxiliary decoder to the main receiving card.

In this embodiment, the display device may be an L ED television wall, and when the main receiving card configured in the display device receives the first video signal or the second video signal, the driving module configured in the display device may configure the first video signal or the second video signal received by the main receiving card to be displayed on the L ED television wall.

It should be noted that the signal processing method of the present application can be executed by a master decoder, a slave decoder or a signal source device.

The embodiment of the invention provides a signal processing method, when a video signal sent by signal source equipment is displayed on the wall, a first video signal and a second video signal can be respectively sent to a main sending card through a main decoder and a slave decoder, so that the first video signal or the second video signal can be sent to a main receiving card of display equipment through the main sending card, under the condition that the transmission interruption is caused by the failure of the decoder on one link, the other link can be switched and the video signal sent by the decoder on the other link is used for displaying on the wall, and the problem that the data transmission interruption is caused by the failure of the decoder on one link, and the upper wall picture on the display equipment is interrupted is avoided; in addition, the first video signal and the second video signal come from the same source video code stream, so that the first video signal and the second video signal sent to the display equipment can be ensured to be consistent, the wall-mounted picture before switching can be ensured to be consistent with the wall-mounted picture after switching, and seamless switching of the front picture and the rear picture can be realized.

Fig. 8 is a flow chart of still another signal processing method provided in the embodiment of the present invention, and the embodiment of the present invention is further optimized on the basis of the above embodiment, and the embodiment of the present invention may be combined with each alternative in one or more of the above embodiments. As shown in fig. 8, the signal processing method provided in the embodiment of the present invention may include the following steps S810 to S840:

and S810, decoding the acquired homologous video code stream through a main decoder, and sending the decoded video signal to a main sending card and a slave sending card.

And S820, decoding the acquired homologous video code stream through the slave decoder, and sending the decoded video signal to the main sending card and the slave sending card.

In this embodiment, fig. 9 is a schematic diagram of still another multilink transmission video signal provided in this embodiment of the present invention. The main decoder can receive the homologous video code stream sent by the signal source equipment from the preset multicast group, and the slave decoder can also receive the homologous video code stream sent by the signal source equipment from the preset multicast group. The main decoder and the slave decoder can synchronously decode the obtained homologous video code streams.

In this embodiment, the even ports of the decoder can be used as the backup of the corresponding odd ports, i.e. the output signals of the odd ports and the corresponding even ports of the decoder are identical. Referring to fig. 9, the master decoder may synchronously transmit the decoded video code streams to the master transmitting card and the slave transmitting card, respectively, and the slave decoder may synchronously transmit the decoded video code streams to the master transmitting card and the slave transmitting card, respectively. The main decoder and the slave decoders are adopted to send the video signals, so that the decoded video signals can be sent by the decoder on the other link under the condition that the decoders on any link fail, and the phenomenon that the decoded video signals cannot be continuously transmitted under the condition that the decoders fail, so that the pictures displayed on the wall are interrupted is avoided.

S830, selecting one video signal from the received decoded video signals as a third video signal through the main transmitting card; and transmitting the third video signal to a main receiving card configured in the display device through the main transmitting card.

In this embodiment, the third video signal is obtained by decoding the obtained homologous video code stream through the master decoder or the slave decoder, and is sent from the master transmitting card. Referring to fig. 9, for the master transmitting card, the master transmitting card may simultaneously receive the decoded video stream from the master decoder and the decoded video stream from the slave decoder based on the integrated multiple homologous input ports. Under the condition that the main sending card receives two paths of homologous video signals at the same time, the main sending card can select one path of decoded video signals from the two paths of homologous video signals as third video signals according to configuration information. At this time, the third video signal may belong to the first video signal, and the third video signal may be directly output from the main transmitting card and transmitted to the main receiving card.

S840, selecting one video signal from the received decoded video signals as a fourth video signal through the slave sending card; and transmitting the fourth video signal to a slave receiving card configured in the display device through the slave transmitting card so as to enable the display device to display by adopting the third video signal or the fourth video signal.

In this embodiment, the fourth video signal is obtained by decoding the acquired homologous video code stream through the master decoder or the slave decoder, and is sent from the slave sending card. Referring to fig. 9, for the slave transmitting card, the slave transmitting card may also simultaneously receive the decoded video stream from the master decoder and the decoded video stream from the slave decoder based on the integrated multiple homologous input ports. Under the condition that the two paths of homologous video signals are simultaneously received from the sending card, the sending card can select one path of decoded video signal from the two paths of homologous video signals as a fourth video signal according to the configuration information. At this time, the fourth video signal may belong to the second path of video signals, and the fourth video signal may be directly output from the slave transmitting card and transmitted to the slave receiving card.

In this embodiment, referring to fig. 9, a display device is integrated with a master receiving card and a slave receiving card, when the display device is started, the master receiving card and the slave receiving card can be designated to be managed by the same driving module, the driving module is responsible for monitoring the video signal receiving conditions of the master receiving card and the slave receiving card and determining the operating states of the master receiving card and the slave receiving card, if the driving module senses that the master receiving card and the slave receiving card simultaneously receive video signals, the driving module configures a third video signal received by the master receiving card to drive an L ED television wall, if the driving module senses that the operating state of the master receiving card is abnormal or that the received video signals are abnormal, the driving module configures a fourth video signal received by the slave receiving card to drive a L ED television wall.

The embodiment of the invention provides a signal processing method, which transmits a third video signal to a main receiving card configured in a display device through a main transmitting card, and transmits a fourth video signal to a slave receiving card configured in the display device through the slave transmitting card, so that the switching to another link and the use of the video signal transmitted by a decoder on the other link can be ensured under the condition that the decoder on one link fails to cause transmission interruption, thereby performing on-wall display, and avoiding the problem that the data transmission is interrupted due to the failure of the decoder on one link and the interruption of an on-wall picture on the display device.

Fig. 10 is a block diagram of a signal processing system provided in an embodiment of the present invention. The embodiment of the invention can be suitable for the condition of carrying out backup processing on the video signal, in particular to the condition of carrying out backup on the video signal sent by the signal source equipment in an on-wall display scene. The signal processing system of the present embodiment may adopt the signal processing method provided in the foregoing embodiments. As shown in fig. 10, the signal processing system provided in the embodiment of the present invention includes: a first processing device 1010, a second processing device 1020, and a display device 1030. Wherein the content of the first and second substances,

the first processing device 1010 is configured to transmit a first video signal to the display device 120 by using a first transmission link;

the second processing device 1020 is configured to transmit the second channel of video signals to the display device 130 using a second transmission link;

the display device 1030 is configured to display by using the first path of video signal or the second path of video signal;

and the first path of video signal and the second path of video signal are obtained by decoding the acquired homologous video code stream through at least one decoder.

On the basis of the above embodiment, optionally, referring to fig. 5 and fig. 10, the first processing device 1010 is a master decoder, the second processing device 1020 is a slave decoder, and the signal processing system of the present embodiment further includes a master transmitting card and a slave transmitting card. Wherein the content of the first and second substances,

the main decoder is configured to decode the obtained homologous video code stream to obtain a first video signal; and, in the case of obtaining the first video signal, sending the first video signal to the main transmitting card;

the slave decoder is configured to decode the obtained homologous video code stream to obtain a second video signal; and, in the case of obtaining the second video signal, sending the second video signal to the main transmitting card;

the main transmitting card is configured to transmit the first video signal or the second video signal to the main receiving card configured in the display device 1030.

On the basis of the above embodiment, optionally, referring to fig. 9 and fig. 10, the first processing device 1010 is a master transmission card, the second processing device 1020 is a slave transmission card, and the signal processing system of this embodiment further includes at least one decoding device. Wherein the content of the first and second substances,

the at least one decoding device is configured to decode the obtained homologous video code stream and send the decoded video signals to the main sending card and the auxiliary sending card; wherein the at least one decoding device comprises a master decoder, or a master decoder and a slave decoder;

the main transmitting card is configured to select one path of video signal from the decoded video signals as a third video signal; and, send the third video signal to the main receiving card disposed in the display device 1030;

the slave sending card is specifically configured to select one video signal from the decoded video signals as a fourth video signal; and transmits the fourth video signal to the slave reception card configured in the display device 1030.

On the basis of the above embodiment, optionally, the first path of video signal and the second path of video signal are sent synchronously.

On the basis of the foregoing embodiment, optionally, the homologous video code stream is a video code stream sent by the same signal source device and acquired from a preset multicast group.

On the basis of the foregoing embodiment, optionally, the signal processing system of the present embodiment includes a master decoder and a slave decoder; the master decoder and the slave decoder are configured to synchronously decode the respective acquired homologous video code streams.

On the basis of the above embodiment, optionally, the signal processing system of the present embodiment includes a slave decoder;

the slave decoder is configured to determine whether a code stream check value is packaged in the homologous video code stream, and determine whether the packaged code check value is a preset value under the condition of determining the packaged code stream check value so as to check the legality of the obtained homologous video code stream; and if the obtained homologous video code stream is determined to be legal, decoding the obtained homologous video code stream.

The signal processing system provided in the embodiment of the present invention may be applied to the signal processing method provided in any embodiment of the present invention, and has corresponding functions and advantages of the signal processing system, and specific reference may be made to the signal processing method provided in any embodiment of the present invention without detailed technical details described in the embodiment above.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including AN object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.