CN111741234A - Video channel allocation and coupling sharing system - Google Patents
Video channel allocation and coupling sharing system Download PDFInfo
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- CN111741234A CN111741234A CN202010606392.1A CN202010606392A CN111741234A CN 111741234 A CN111741234 A CN 111741234A CN 202010606392 A CN202010606392 A CN 202010606392A CN 111741234 A CN111741234 A CN 111741234A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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Abstract
The invention belongs to the technical field of videos, and particularly relates to a video channel allocation and coupling sharing system. The transmission capability of a single channel cannot meet the transmission requirement of video services, the multichannel video transmission method is widely applied, but the frequent switching of videos among a plurality of channels is high in cost and is easy to cause problems of screen flashing, time delay, blocking and the like. Therefore, the video channel allocation and coupling sharing system provided by the invention comprises: the system comprises a video source module, a selection matrix, a selection control module and a receiving module, wherein the video source module, the selection matrix, the selection control module and the receiving module are used for carrying out channel distribution and data interconnection in an optimized mode so as to realize multi-channel video coupling sharing. The scheme can break an information island, and channel allocation and data interconnection are carried out in a combination and selection mode, so that multi-channel video coupling sharing is realized.
Description
Technical Field
The invention belongs to the technical field of videos, and particularly relates to a video channel allocation and coupling sharing system.
Background
With the development of intelligent terminals and intelligent applications, the requirements for video information transmission and resource allocation are increasingly urgent, and the method becomes a research hotspot in recent years. The transmission capability of a single channel cannot meet the transmission requirement of video services, the multichannel video transmission method is widely applied, but the frequent switching of videos among a plurality of channels is high in cost and is easy to cause problems of screen flashing, time delay, blocking and the like. How to realize multi-channel video information distribution and coupling sharing has become a difficult point troubling users.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to break an information island and realize multi-channel video coupling and sharing.
(II) technical scheme
To solve the above technical problem, the present invention provides a video channel allocation and coupling sharing system, which comprises: the device comprises a video source module, a selection matrix, a selection control module and a receiving module;
the number of the video source modules is N, and the video source modules are divided into a video source module 1 and a video source module 2 … … video source module N; the N is more than or equal to 2;
n selection matrixes are provided and are divided into a selection matrix 1 and a selection matrix 2 … … to select a matrix N; the N is more than or equal to 2;
the number of the receiving modules is N, and the receiving modules are divided into a receiving module 1 and a receiving module 2 … …; the N is more than or equal to 2;
the N video source modules are in one-to-one butt joint with the N selection matrixes, namely, the video source module 1 is connected with the selection matrix 1, and the video source module 2 is connected with the selection matrix 2 … …;
the N receiving modules are in one-to-one butt joint with the N selection matrixes, namely, a receiving module 1 is connected with a selection matrix 1, and a receiving module 2 is connected with a selection matrix 2 … …;
in the N selection matrixes, two transmission channels are arranged between adjacent selection matrixes and comprise: a forward transmission channel for transmitting the video signal from the previous selection matrix to the next selection matrix between the adjacent selection matrices; and a reverse transmission channel between adjacent selection matrices for transmitting the video signal from a subsequent selection matrix to a previous selection matrix; therefore, N-1 forward transmission channels and N-1 reverse transmission channels are arranged among the N selection matrixes;
the N video source modules are used for correspondingly inputting video signals into the N selection matrixes respectively;
the selection control module is used for sending gating instructions according to transmission requirements and controlling the N selection matrixes to transmit the received video signals to one or more receiving modules.
The gating instruction is used for gating a plurality of forward transmission channels and/or reverse transmission channels in the N-1 forward transmission channels and the N-1 reverse transmission channels, so that after a certain selection matrix receives the video signals of the video source module corresponding to the certain selection matrix, the video signals are transmitted to another selection matrix according to the gating instruction, and the received video signals are transmitted to the corresponding receiving module by the other selection matrix.
The gating instruction is further used for not gating any forward transmission channel and any reverse transmission channel in the N-1 forward transmission channels and the N-1 reverse transmission channels, so that after a certain selection matrix receives the video signals of the video source module corresponding to the selection matrix, the received video signals are directly transmitted to the corresponding receiving module.
The N selection matrixes are used for transmitting the received video signals from the video source module, the forward transmission channel or the reverse transmission channel to the corresponding receiving module.
The number of the video source modules is 2, and the video source modules are divided into a video source module 1 and a video source module 2;
the number of the selection matrixes is 2, and the selection matrixes are divided into a selection matrix 1 and a selection matrix 2;
the number of the receiving modules is 2, and the receiving modules are divided into a receiving module 1 and a receiving module 2;
the video source module 1 is used as the input of a selection matrix 1;
the video source module 2 is used as the input of a selection matrix 2;
the input end of the selection matrix 1 is a video source module 1, the output end of the selection matrix 1 is in two paths, one path of output end is a forward transmission channel B and is connected with the selection matrix 2, the forward transmission channel B is used as one path of input of the selection matrix 2, and the other path of output end is connected with the receiving module 1;
the input end of the selection matrix 2 is a video module 2, the output end of the selection matrix 2 is two paths, one path of output end is a reverse transmission channel A and is connected with the selection matrix 1, the reverse transmission channel A is used as one path of input of the selection matrix 1, and the other path of output end is connected with the receiving module 2;
the selection control module is used for outputting gating instructions to control the opening and closing of the forward transmission channel B and the reverse transmission channel A.
Wherein, when the receiving module 1 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is directly transmitted to the receiving module 1.
Wherein, when the receiving module 1 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B to be closed, but the reverse transmission channel A is opened;
therefore, after receiving the video signal of the video source module 2, the selection matrix 2 transmits the video signal to the selection matrix 1 through the reverse transmission channel a, and then the selection matrix 1 transmits the video signal to the receiving module 1.
Wherein, when the receiving module 2 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 2 receives the video signal of the video source module 2, the video signal is directly transmitted to the receiving module 2.
Wherein, when the receiving module 2 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B to be opened, but the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is transmitted to the selection matrix 2 through the forward transmission channel B, and then the video signal is transmitted to the receiving module 2 through the selection matrix 2.
Wherein, the video source module 1 outputs video signals including: cameralink video signals, HSDI video signals, SDI video signals, PAL video signals;
the video source module 2 outputs video signals including: cameralink video signal, HSDI video signal, SDI video signal, PAL video signal.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention controls the N selection matrixes to transmit the received video signals to one or more receiving modules by gating a plurality of forward transmission channels and/or reverse transmission channels or not gating any forward transmission channel and reverse transmission channel through N video source modules, N selection matrixes, N selection control modules and N receiving modules.
Drawings
Fig. 1 is a schematic diagram of the technical scheme of the invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
To solve the problems in the prior art, the present invention provides a video channel allocation and coupling sharing system, as shown in fig. 1, the system includes: the device comprises a video source module, a selection matrix, a selection control module and a receiving module;
the number of the video source modules is N, and the video source modules are divided into a video source module 1 and a video source module 2 … … video source module N; the N is more than or equal to 2;
n selection matrixes are provided and are divided into a selection matrix 1 and a selection matrix 2 … … to select a matrix N; the N is more than or equal to 2;
the number of the receiving modules is N, and the receiving modules are divided into a receiving module 1 and a receiving module 2 … …; the N is more than or equal to 2;
the N video source modules are in one-to-one butt joint with the N selection matrixes, namely, the video source module 1 is connected with the selection matrix 1, and the video source module 2 is connected with the selection matrix 2 … …;
the N receiving modules are in one-to-one butt joint with the N selection matrixes, namely, a receiving module 1 is connected with a selection matrix 1, and a receiving module 2 is connected with a selection matrix 2 … …;
in the N selection matrixes, two transmission channels are arranged between adjacent selection matrixes and comprise: a forward transmission channel for transmitting the video signal from the previous selection matrix to the next selection matrix between the adjacent selection matrices; and a reverse transmission channel between adjacent selection matrices for transmitting the video signal from a subsequent selection matrix to a previous selection matrix; therefore, N-1 forward transmission channels and N-1 reverse transmission channels are arranged among the N selection matrixes;
the N video source modules are used for correspondingly inputting video signals into the N selection matrixes respectively;
the selection control module is used for sending gating instructions according to transmission requirements and controlling the N selection matrixes to transmit the received video signals to one or more receiving modules.
The gating instruction is used for gating a plurality of forward transmission channels and/or reverse transmission channels in the N-1 forward transmission channels and the N-1 reverse transmission channels, so that after a certain selection matrix receives the video signals of the video source module corresponding to the certain selection matrix, the video signals are transmitted to another selection matrix according to the gating instruction, and the received video signals are transmitted to the corresponding receiving module by the other selection matrix.
The gating instruction is further used for not gating any forward transmission channel and any reverse transmission channel in the N-1 forward transmission channels and the N-1 reverse transmission channels, so that after a certain selection matrix receives the video signals of the video source module corresponding to the selection matrix, the received video signals are directly transmitted to the corresponding receiving module.
The N selection matrixes are used for transmitting the received video signals from the video source module, the forward transmission channel or the reverse transmission channel to the corresponding receiving module.
The number of the video source modules is 2, and the video source modules are divided into a video source module 1 and a video source module 2;
the number of the selection matrixes is 2, and the selection matrixes are divided into a selection matrix 1 and a selection matrix 2;
the number of the receiving modules is 2, and the receiving modules are divided into a receiving module 1 and a receiving module 2;
the video source module 1 is used as the input of a selection matrix 1;
the video source module 2 is used as the input of a selection matrix 2;
the input end of the selection matrix 1 is a video source module 1, the output end of the selection matrix 1 is in two paths, one path of output end is a forward transmission channel B and is connected with the selection matrix 2, the forward transmission channel B is used as one path of input of the selection matrix 2, and the other path of output end is connected with the receiving module 1;
the input end of the selection matrix 2 is a video module 2, the output end of the selection matrix 2 is two paths, one path of output end is a reverse transmission channel A and is connected with the selection matrix 1, the reverse transmission channel A is used as one path of input of the selection matrix 1, and the other path of output end is connected with the receiving module 2;
the selection control module is used for outputting gating instructions to control the opening and closing of the forward transmission channel B and the reverse transmission channel A.
Wherein, when the receiving module 1 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is directly transmitted to the receiving module 1.
Wherein, when the receiving module 1 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B to be closed, but the reverse transmission channel A is opened;
therefore, after receiving the video signal of the video source module 2, the selection matrix 2 transmits the video signal to the selection matrix 1 through the reverse transmission channel a, and then the selection matrix 1 transmits the video signal to the receiving module 1.
Meanwhile, the selection matrix 2 also transmits the received video signal of the video source module 2 to the receiving module 2.
Wherein, when the receiving module 2 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 2 receives the video signal of the video source module 2, the video signal is directly transmitted to the receiving module 2.
Wherein, when the receiving module 2 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B to be opened, but the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is transmitted to the selection matrix 2 through the forward transmission channel B, and then the video signal is transmitted to the receiving module 2 through the selection matrix 2.
Meanwhile, the selection matrix 1 also transmits the received video signal of the video source module 1 to the receiving module 1.
Wherein, the video source module 1 outputs video signals including: cameralink video signals, HSDI video signals, SDI video signals, PAL video signals;
the video source module 2 outputs video signals including: cameralink video signal, HSDI video signal, SDI video signal, PAL video signal.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A video channel allocation and coupling sharing system, the system comprising: the device comprises a video source module, a selection matrix, a selection control module and a receiving module;
the number of the video source modules is N, and the video source modules are divided into a video source module 1 and a video source module 2 … … video source module N; the N is more than or equal to 2;
n selection matrixes are provided and are divided into a selection matrix 1 and a selection matrix 2 … … to select a matrix N; the N is more than or equal to 2;
the number of the receiving modules is N, and the receiving modules are divided into a receiving module 1 and a receiving module 2 … …; the N is more than or equal to 2;
the N video source modules are in one-to-one butt joint with the N selection matrixes, namely, the video source module 1 is connected with the selection matrix 1, and the video source module 2 is connected with the selection matrix 2 … …;
the N receiving modules are in one-to-one butt joint with the N selection matrixes, namely, a receiving module 1 is connected with a selection matrix 1, and a receiving module 2 is connected with a selection matrix 2 … …;
in the N selection matrixes, two transmission channels are arranged between adjacent selection matrixes and comprise: a forward transmission channel for transmitting the video signal from the previous selection matrix to the next selection matrix between the adjacent selection matrices; and a reverse transmission channel between adjacent selection matrices for transmitting the video signal from a subsequent selection matrix to a previous selection matrix; therefore, N-1 forward transmission channels and N-1 reverse transmission channels are arranged among the N selection matrixes;
the N video source modules are used for correspondingly inputting video signals into the N selection matrixes respectively;
the selection control module is used for sending gating instructions according to transmission requirements and controlling the N selection matrixes to transmit the received video signals to one or more receiving modules.
2. The video channel assignment and coupling sharing system according to claim 1, wherein the gating command is used to gate a plurality of forward transmission channels and/or reverse transmission channels of the N-1 forward transmission channels and the N-1 reverse transmission channels, such that a certain selection matrix is used to transmit the video signal to another selection matrix according to the gating command after receiving the video signal of its corresponding video source module, and the another selection matrix transmits the received video signal to the corresponding receiving module.
3. The video channel assignment and coupling sharing system of claim 2, wherein the gating command is further configured to not gate any of the N-1 forward transmission channels and any of the N-1 reverse transmission channels, such that a selection matrix directly transmits the received video signal to the corresponding receiving module after receiving the video signal of its corresponding video source module.
4. The video channel assignment and coupling sharing system of claim 1, wherein each of the N selection matrices is configured to transmit a video signal received from a video source module, a forward transmission channel or a reverse transmission channel to its corresponding receiving module.
5. The video channel assignment and coupling sharing system of claim 4, wherein there are 2 video source modules, which are divided into video source module 1 and video source module 2;
the number of the selection matrixes is 2, and the selection matrixes are divided into a selection matrix 1 and a selection matrix 2;
the number of the receiving modules is 2, and the receiving modules are divided into a receiving module 1 and a receiving module 2;
the video source module 1 is used as the input of a selection matrix 1;
the video source module 2 is used as the input of a selection matrix 2;
the input end of the selection matrix 1 is a video source module 1, the output end of the selection matrix 1 is in two paths, one path of output end is a forward transmission channel B and is connected with the selection matrix 2, the forward transmission channel B is used as one path of input of the selection matrix 2, and the other path of output end is connected with the receiving module 1;
the input end of the selection matrix 2 is a video module 2, the output end of the selection matrix 2 is two paths, one path of output end is a reverse transmission channel A and is connected with the selection matrix 1, the reverse transmission channel A is used as one path of input of the selection matrix 1, and the other path of output end is connected with the receiving module 2;
the selection control module is used for outputting gating instructions to control the opening and closing of the forward transmission channel B and the reverse transmission channel A.
6. The video channel assignment and coupling sharing system of claim 5, wherein when the receiving module 1 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is directly transmitted to the receiving module 1.
7. The video channel assignment and coupling sharing system of claim 5, wherein when the receiving module 1 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B to be closed, but the reverse transmission channel A is opened;
therefore, after receiving the video signal of the video source module 2, the selection matrix 2 transmits the video signal to the selection matrix 1 through the reverse transmission channel a, and then the selection matrix 1 transmits the video signal to the receiving module 1.
8. The video channel assignment and coupling sharing system of claim 5, wherein when the receiving module 2 needs to receive the video signal of the video source module 2,
the gating instruction controls the forward transmission channel B and the reverse transmission channel A to be closed;
therefore, after the selection matrix 2 receives the video signal of the video source module 2, the video signal is directly transmitted to the receiving module 2.
9. The video channel assignment and coupling sharing system of claim 5, wherein when the receiving module 2 needs to receive the video signal of the video source module 1,
the gating instruction controls the forward transmission channel B to be opened, but the reverse transmission channel A to be closed;
therefore, after the selection matrix 1 receives the video signal of the video source module 1, the video signal is transmitted to the selection matrix 2 through the forward transmission channel B, and then the video signal is transmitted to the receiving module 2 through the selection matrix 2.
10. The video channel assignment and coupling sharing system of claim 5, wherein the video source module 1 outputs a video signal comprising: cameralink video signals, HSDI video signals, SDI video signals, PAL video signals;
the video source module 2 outputs video signals including: cameralink video signal, HSDI video signal, SDI video signal, PAL video signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116016819A (en) * | 2022-12-08 | 2023-04-25 | 天津津航计算技术研究所 | Comprehensive avionics system video source distribution method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080171458A1 (en) * | 2007-01-17 | 2008-07-17 | Pelco, Inc. | Apparatus for facilitating video connections to surveillance devices |
| US20140211095A1 (en) * | 2013-01-28 | 2014-07-31 | Adder Technology Limited | Digital video and data transmission |
| CN104240672A (en) * | 2014-09-12 | 2014-12-24 | 京东方科技集团股份有限公司 | Video processing device and method |
| CN108234942A (en) * | 2017-12-14 | 2018-06-29 | 中国北方车辆研究所 | A kind of high-bandwidth video switching device |
| CN210781064U (en) * | 2019-12-16 | 2020-06-16 | 北京小鸟科技股份有限公司 | Large-scale video display control matrix equipment based on channel multiplexing technology |
-
2020
- 2020-06-29 CN CN202010606392.1A patent/CN111741234B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080171458A1 (en) * | 2007-01-17 | 2008-07-17 | Pelco, Inc. | Apparatus for facilitating video connections to surveillance devices |
| US20140211095A1 (en) * | 2013-01-28 | 2014-07-31 | Adder Technology Limited | Digital video and data transmission |
| CN104240672A (en) * | 2014-09-12 | 2014-12-24 | 京东方科技集团股份有限公司 | Video processing device and method |
| CN108234942A (en) * | 2017-12-14 | 2018-06-29 | 中国北方车辆研究所 | A kind of high-bandwidth video switching device |
| CN210781064U (en) * | 2019-12-16 | 2020-06-16 | 北京小鸟科技股份有限公司 | Large-scale video display control matrix equipment based on channel multiplexing technology |
Non-Patent Citations (1)
| Title |
|---|
| 刘同玉 等: "基于 MAX4456芯片的VGA 矩阵切换系统的设计", 《网络、通信与多媒体》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116016819A (en) * | 2022-12-08 | 2023-04-25 | 天津津航计算技术研究所 | Comprehensive avionics system video source distribution method |
| CN116016819B (en) * | 2022-12-08 | 2024-11-05 | 天津津航计算技术研究所 | Comprehensive avionics system video source distribution method |
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