CN106791491A - A kind of devices and methods therefor of video matrix switching - Google Patents
A kind of devices and methods therefor of video matrix switching Download PDFInfo
- Publication number
- CN106791491A CN106791491A CN201710039580.9A CN201710039580A CN106791491A CN 106791491 A CN106791491 A CN 106791491A CN 201710039580 A CN201710039580 A CN 201710039580A CN 106791491 A CN106791491 A CN 106791491A
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- video
- chip
- output
- processing module
- switching
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- H—ELECTRICITY
- 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
Abstract
The present invention relates to a kind of devices and methods therefor of video matrix switching, the device includes microcontroller, video input module, video prime processing module, Inverse problem chip, video post processing module, control interface and Video Output Modules；Control interface is connected with microcontroller；Microcontroller, the switching signal for receiving control interface output, freezeout signal controls the Inverse problem chip to carry out video switching to Video Output Modules image freezing；Video prime processing module is connected with video input module；Inverse problem chip, for and receive microcontroller input control signal carry out video switching, be connected with video prime processing module and microcontroller respectively；Video post processing module is connected with Inverse problem chip；Video Output Modules are connected with microcontroller and video post processing module respectively.The present invention is realized in the case of video source is nonsynchronous, without splashette and without interim card during switching, improves the experience sense of user.
Description
Technical field
The present invention relates to the technical field of video matrix, more specifically refer to a kind of video matrix switching device and its
Method.
Background technology
Video matrix refers to the method switched by array by m roads vision signal arbitrarily output to n roads monitoring device
Electronic installation, the generally input of matrix is m more than output>n.There are some video matrixs with Audio conversion function,
Video and audio signal can be synchronized switching, this matrix is also referred to as video/audio matrix.Current video matrix is just in fact
There are analog matrix and the major class of character matrix two for existing method.Video matrix is generally used for all kinds of monitoring occasions, such as video conference,
Safety monitoring, long-distance education and scientific and technological court etc..
Current video matrix due to access video source be difficult to accomplish synchronization, therefore, can be made unavoidably when video switches
The problems such as into output splashette, time delay interim card.
Therefore, it is necessary to design a kind of device of video matrix switching, the nonsynchronous situation of video source in input is realized
Under, also can improve the experience sense of user in switching without splashette and without interim card.
The content of the invention
Defect it is an object of the invention to overcome prior art, there is provided a kind of device of video matrix switching and its side
Method.
To achieve the above object, the present invention uses following technical scheme：A kind of device of video matrix switching, including micro-control
Device processed, video input module, video prime processing module, Inverse problem chip, video post processing module, control interface and
Video Output Modules；
The control interface, for output switching signal, is connected with the microcontroller；
The microcontroller, the switching signal for receiving the control interface output, freezeout signal is defeated to video
Go out module image freezing, and control the Inverse problem chip to carry out video switching；
The video input module, for obtaining video source；
The video prime processing module, for carrying out prime treatment to video source, obtains converting video, with the video
Input module is connected；
The Inverse problem chip, for carrying out Inverse problem to the converting video, obtains branch's video, and receive institute
The control signal for stating microcontroller input carries out video switching, respectively with the video prime processing module and the microcontroller
Device is connected；
The video post processing module, for carrying out rear class treatment to branch's video, obtains designated, with institute
State the connection of Inverse problem chip；
The Video Output Modules, the reception switching signal for receiving the microcontroller input carries out image freezing,
And after the switching matrix chip switches to designated, defrosting picture, play video, respectively with the microcontroller and
The video post processing module connection.
Its further technical scheme is：The video input module includes input interface and interface chip, the input
Interface is connected with the interface chip；The interface chip is connected with the video post processing module.
Its further technical scheme is：The Video Output Modules include that output interface and pio chip are connected, described
Pio chip is the video frequency output chip of integrated SRAM, and the pio chip is connected with the output interface, the pio chip
It is connected with the video post processing module.
Its further technical scheme is：The video prime processing module is video frequency processing chip.
Its further technical scheme is：The video post processing module is video frequency processing chip.
Present invention also offers a kind of method of video matrix switching, methods described includes
Microcontroller receives the switching signal of the control interface output；
Microprocessor control Video Output Modules freeze to current output picture；
Microprocessor control Inverse problem chip will be exported after picture switches to designated, control Video Output Modules pair
Current output picture is thawed, and plays the designated.
Its further technical scheme is：Before the step of microcontroller receives the switching signal of control interface output, also wrap
Include：
Video input module obtains video source；
Video prime processing module is processed the video source, obtains converting video；
Inverse problem chip carries out Inverse problem to the converting video, obtains branch's video；
Video post processing module carries out subsequent treatment to branch's video, obtains designated.
Its further technical scheme is：In the step of video input module obtains video source, the video source lattice of acquisition
Formula includes at least one of SDI, HDMI, DVI, VGA, YPbPr and CVBS.
Its further technical scheme is：The video prime processing module is processed the video source, is obtained and is turned
The step of changing video, including step in detail below：
OSD superpositions are carried out to the video source, overlay video is obtained；
The overlay video is changed, HDMI video signal is obtained, is regarded as conversion using the HDMI video signal
Frequently.
Its further technical scheme is：Video post processing module carries out subsequent treatment to branch's video, and acquisition refers to
The step of determining video, specifically carries out conversion process to branch's video, BT1120 vision signals is obtained, with BT1120 vision signals
As output video.
Compared with the prior art, the invention has the advantages that：A kind of device of video matrix switching of the invention, passes through
Freeze current output picture, Inverse problem chip internal carries out video switching, thaw output picture after finishing, output picture is defeated
The video for going out is the video after switching, freezes, switches and thawing time is shorter, and human eye is difficult to discover, therefore can realize
In the case of the video source of input is nonsynchronous, also the experience sense of user can be improved in switching without splashette and without interim card.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
A kind of structural representation of the device of video matrix switching that Fig. 1 is provided for the specific embodiment of the invention；
A kind of information exchange schematic diagram of the device of video matrix switching that Fig. 2 is provided for the specific embodiment of the invention；
A kind of flow chart of the method for video matrix switching that Fig. 3 is provided for the specific embodiment of the invention；
The particular flow sheet that Fig. 4 is processed video source for video prime processing module that the specific embodiment of the invention is provided.
Specific embodiment
In order to more fully understand technology contents of the invention, technical scheme is entered with reference to specific embodiment
One step introduction and explanation, but it is not limited to this.
Specific embodiment as shown in figures 1-4, a kind of device of video matrix switching that the present embodiment is provided, Ke Yiyun
During treatment video, realize in the case of the video source of input is nonsynchronous, also can in switching without splashette and
Without interim card, the experience sense of user is improved.
A kind of device of video matrix switching, including microcontroller 6, video input module, video prime processing module 2,
Inverse problem chip 3, video post processing module 4, control interface 7 and Video Output Modules；
Control interface 7, for output switching signal, is connected with microcontroller 6；
Microcontroller 6, the switching signal for receiving the output of control interface 7, freezeout signal to Video Output Modules
Frozen interface, and control the Inverse problem chip 3 to carry out video switching；
Video input module, for obtaining video source；
Video prime processing module 2, for carrying out prime treatment to video source, obtains converting video, with video input mould
Block is connected；
Inverse problem chip 3, for carrying out Inverse problem to converting video, obtains branch's video, and receive the micro-control
The control signal of the input of device processed 6 carries out video switching, is connected with video prime processing module 2 and the microcontroller 6 respectively；
Video post processing module 4, for carrying out rear class treatment to branch's video, obtains output video, with the matrix
Switching chip 3 is connected；
The Video Output Modules, the reception switching signal for receiving the input of microcontroller 6 carries out image freezing, and
After switching matrix chip switches to designated, defrosting picture, play video, respectively with microcontroller 6 and video rear class at
Reason module 4 is connected.
Inverse problem chip 3 and Video Output Modules are controlled by setting microcontroller 6, are needing to be regarded
When frequency switches, interface control module first controls Video Output Modules to the input video switching signal of microcontroller 6, microcontroller 6
Freeze current output picture, and video switching is carried out inside Inverse problem chip 3, the output picture for thawing current after finishing
Face, then export the picture that picture has been the stabilization after switching, and the output vision signal after defrosting is also stabilization, due to freezing,
Switching and the time thawed are very short, and human eye has the effect of the persistence of vision, therefore, human eye is difficult to discover video when switching
Switching gap, so as to ensure that the effect of not splashette and non-interim card during output video switching.
The device of above-mentioned a kind of video matrix switching, by freezing current output picture, inside Inverse problem chip 3
Carry out video switching, after finishing thaw output picture, output picture output video be switching after video, freeze, switch with
And thawing time is shorter, human eye is difficult to discover, therefore can realize in the case of the video source of input is nonsynchronous, can also cut
Without splashette and without interim card when changing, the experience sense of user is improved.
Further, video input module include input interface 8 and interface chip 1, the input interface 8 with it is described
Interface chip 1 is connected；The interface chip 1 is connected with the video post processing module 4.
Above-mentioned interface chip 1 can be ADV7604 chips or other chips of video input interface 8.
According to the input interface 8 and the difference of interface chip 1 selected, the form of the input signal of support have SDI,
A variety of video source signals such as HDMI, DVI, VGA, YPbPr, CVBS.
In addition, Video Output Modules include output interface 9 and pio chip 5, pio chip 5 is the video of integrated SRAM
Pio chip 5, pio chip 5 is connected with output interface 9, and pio chip 5 is connected with video post processing module 4.
In addition, pio chip 5 use be internally integrated SRAM, with caching function, can by be input into come in regard
The video frequency output chip 5 that frequency signal is freezed.Output interface 9 can as needed select different video interfaces, Neng Gouzhi
Hold the output of the vision signals such as conventional HDMI, DVI, VGA, YPbPr, CVBS.
In the present embodiment, video prime processing module 2 is video frequency processing chip, and video post processing module 4 is video
Process chip.
Specifically, video prime processing module 2 is specially Video Quality Metric process chip；Video post processing module 4 be regarding
Frequency conversion process chip.
As shown in figure 3, being a kind of method of video matrix switching that the present embodiment is provided, the method includes：
S1, video input module obtain video source；
S2,2 pairs of video sources of video prime processing module are processed, and obtain converting video；
S3,3 pairs of converting videos of Inverse problem chip carry out Inverse problem, obtain branch's video；
S4, the branch's video of video post processing module 4 pairs carry out subsequent treatment, obtain designated；
S5, microcontroller 6 receive the switching signal of the output of the control interface 7；
S6, the control Video Output Modules of microcontroller 6 freeze to current output picture；
After output picture is switched to designated by S7, the control Inverse problem of microcontroller 6 chip 3, video frequency output is controlled
Module is thawed to current output picture, plays the designated.
Above-mentioned S1 steps, video input module obtains video source step, specifically, the equipment for loading video source passes through
It is connected with input interface 8, video source is reprinted into interface chip 1, the equipment can be USB or other memories.
By after interface chip 1, acquisition be BT1120 vision signal.
Also, above-mentioned S1 steps, the video source format of acquisition includes SDI, HDMI, DVI, VGA, YPbPr and CVBS
At least one of
Above-mentioned S2 steps, 2 pairs of video sources of video prime processing module are processed, and obtain the step of converting video
Suddenly, including in detail below step：
S21, OSD superpositions are carried out to the video source, obtain overlay video；
S22, the overlay video is changed, obtain HDMI video signal, using the HDMI video signal as turning
Change video.
Inverse problem is carried out by after the treatment of prime, can just supply Inverse problem chip 3.
S3 steps, 3 pairs of converting videos of Inverse problem chip carry out Inverse problem, obtain branch's video, here specifically
It is to be switched on multiple-channel output passage the HDMI video signal matrix for being input into the multichannel come in using Inverse problem chip 3, obtains
The branch's video in each output channel is taken, and is transmitted to video post processing module 4 and is processed.
S4 steps, the branch's video of video post processing module 4 pairs carries out subsequent treatment, obtains the step of designated
Suddenly, conversion process is specifically carried out to branch's video, BT1120 vision signals are obtained, is regarded as output using BT820 vision signals
Frequently.
Above-mentioned S5 steps, microcontroller 6 receive the control interface 7 output switching signal the step of, control interface 7
By RS232 or RS485 signals or the signal of communication of other forms, notify that microcontroller 6 needs to carry out the switching of video.
S6 steps, the step of microcontroller 6 controls Video Output Modules to freeze current output picture, microcontroller
After 6 receive switching signal, Video Output Modules are controlled to be frozen the picture of corresponding output port by exporting I2C signals
Knot.
S7 steps, after output picture is switched to designated by the control Inverse problem of microcontroller 6 chip 3, control video
Output module thaws to current output picture, the step of play the output video, after image freezing is finished, and microcontroller
The switching of designated is carried out inside the output I2C signal control Inverse problems of device 6 chip 3, after switching is finished, by video frequency output mould
Designated after block output switching, microcontroller 6 controls Video Output Modules to thaw current output picture, plays institute
State designated.
In addition, the form of the designated of above-mentioned S7 steps broadcasting is at least one in HDMI, DVI, VGA, YPbPr, CVBS
Kind
A kind of method of above-mentioned video matrix switching, Video Output Modules are controlled to current output by microcontroller 6
Picture freezes, then carries out the switching of designated by Inverse problem chip 3, and switching is thawed current output picture after finishing, from
And current output picture is smoothly switched to the video playback picture specified, because the time freezed, switch and thaw is shorter,
Human eye is difficult to discover, it is thereby achieved that in the case of the video source of input is nonsynchronous, also can in switching without splashette and
Without interim card, the experience sense of user is improved.
It is above-mentioned that technology contents of the invention are only further illustrated with embodiment, it is easier to understand in order to reader, but not
Represent embodiments of the present invention and be only limitted to this, any technology done according to the present invention extends or recreates, by of the invention
Protection.Protection scope of the present invention is defined by claims.
Claims (10)
1. a kind of device of video matrix switching, it is characterised in that at microcontroller, video input module, video prime
Reason module, Inverse problem chip, video post processing module, control interface and Video Output Modules；
The control interface, for output switching signal, is connected with the microcontroller；
The microcontroller, the switching signal for receiving the control interface output, freezeout signal to video frequency output mould
Block image freezing, and control the Inverse problem chip to carry out video switching；
The video input module, for obtaining video source；
The video prime processing module, for carrying out prime treatment to video source, obtains converting video, with the video input
Module is connected；
The Inverse problem chip, for carrying out Inverse problem to the converting video, obtains branch's video, and receive described micro-
The control signal of controller input carries out video switching, connects with the video prime processing module and the microcontroller respectively
Connect；
The video post processing module, for carrying out rear class treatment to branch's video, obtains designated, with the square
Battle array switching chip connection；
The Video Output Modules, the reception switching signal for receiving microcontroller input carries out image freezing, and
After the switching matrix chip switches to designated, defrosting picture plays video, respectively with the microcontroller and described
Video post processing module is connected.
2. a kind of device of video matrix switching according to claim 1, it is characterised in that the video input module bag
Input interface and interface chip are included, the input interface is connected with the interface chip；The interface chip and the video
Post processing module is connected.
3. a kind of device of video matrix switching according to claim 2, it is characterised in that the Video Output Modules bag
Output interface and pio chip are included, the pio chip is the video frequency output chip of integrated SRAM, the pio chip and institute
Output interface connection is stated, the pio chip is connected with the video post processing module.
4. the device of a kind of video matrix switching according to claim 3, it is characterised in that the video prime processes mould
Block is video frequency processing chip.
5. the device of a kind of video matrix switching according to claim 3, it is characterised in that the video rear class processes mould
Block is video frequency processing chip.
6. a kind of method of video matrix switching, it is characterised in that methods described includes
Microcontroller receives the switching signal of the control interface output；
Microprocessor control Video Output Modules freeze to current output picture；
Microprocessor control Inverse problem chip will be exported after picture switches to designated, and control Video Output Modules are to current
Output picture is thawed, and plays the designated.
7. the method for a kind of video matrix switching according to claim 6, it is characterised in that microcontroller receives control circle
Before the step of switching signal of face output, also include：
Video input module obtains video source；
Video prime processing module is processed the video source, obtains converting video；
Inverse problem chip carries out Inverse problem to the converting video, obtains branch's video；
Video post processing module carries out subsequent treatment to branch's video, obtains designated.
8. the method for a kind of video matrix switching according to claim 7, it is characterised in that the video input module is obtained
In the step of taking video source, the video source format of acquisition is included at least one in SDI, HDMI, DVI, VGA, YPbPr and CVBS
Kind.
9. the method for a kind of video matrix switching according to claim 7, it is characterised in that to video prime treatment
Module is processed the video source, the step of obtain converting video, including step in detail below：
OSD superpositions are carried out to the video source, overlay video is obtained；
The overlay video is changed, HDMI video signal is obtained, using the HDMI video signal as converting video.
10. a kind of method of video matrix switching according to claim 7, it is characterised in that video post processing module
The step of subsequent treatment, acquisition designated are carried out to branch's video, specifically carries out conversion process to branch's video, obtains
Take BT1120 vision signals, using BT1120 vision signals as output video.
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| CN201710039580.9A CN106791491A (en) | 2017-01-19 | 2017-01-19 | A kind of devices and methods therefor of video matrix switching |
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| CN201710039580.9A CN106791491A (en) | 2017-01-19 | 2017-01-19 | A kind of devices and methods therefor of video matrix switching |
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| CN112637523A (en) * | 2020-12-08 | 2021-04-09 | 北京淳中科技股份有限公司 | Switching card, display control equipment and video signal switching system |
| CN113132783A (en) * | 2021-04-21 | 2021-07-16 | 湛辉来 | Multi-machine shared multi-screen display control system and method |
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