CN101150727A - Multi-channel video signal transmission and TV wall display method, system and processing device - Google Patents
Multi-channel video signal transmission and TV wall display method, system and processing device Download PDFInfo
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- CN101150727A CN101150727A CNA2007101240623A CN200710124062A CN101150727A CN 101150727 A CN101150727 A CN 101150727A CN A2007101240623 A CNA2007101240623 A CN A2007101240623A CN 200710124062 A CN200710124062 A CN 200710124062A CN 101150727 A CN101150727 A CN 101150727A
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Abstract
The invention provides a method for transmitting multiplex video signals and displaying video-wall, a system and a processing device, wherein, the method comprises: multiplexing multiplex video signals into simplex digital video signals; transmitting simplex digital video signals through a high bandwidth digital interface; displaying simplex digital video signals which are demultiplexed on the video-wall. The method can acquire signals collected by a multiplex video device, multiplex multiplex video signals into simplex digital video signals, transmit multiplex video signals effectively through the high bandwidth digital interface which utilizes single wire or wireless transmission modes. Comparing with prior art which transmits multiplex analog video signals through a plurality of coaxial cables, the method can reduce cost effectively, solves problems of signal distortion and bad flexibility and expansibility.
Description
Technical field
The present invention relates to video technique, particularly a kind of multi-channel video signal transmission and the method, system and the treatment facility that show.
Background technology
Continuous development along with video technique, the a plurality of videos of real-time shooting have appearred, technology with its person that offers the video reception simultaneously, the said video wall technology of people (TV Wall) that Here it is, wherein video wall comprises simulated television wall (Analog TV Wall) and Digital Television wall (Digital TV Wall) again, and multipart video-meeting and monitoring field become the main application scenarios of this technology.
In the video transmission and Display Technique of present stage, for each road signal, handle accordingly by SD (or the low clear) video image that will obtain, utilize a pair of coaxial cable to be transferred to the video display processing device then for demonstration.As shown in Figure 1, obtain the information of a plurality of scenes, and when utilizing a plurality of display devices 100 to show, coaxial cable 110 is carried out transmission of video signals with regard to needs are many when we utilize a plurality of video capture devices 120.Adopt said method to have following defective:
(1) cost height: when setting up the many video wall of way, every display device all needs one to two coaxial line at least, and when video processing equipment was distant apart from display device, construction cost was high and complicated.
(2) distorted signals: owing to what transmit in the coaxial line is common analog signal, so when transmission range was distant, distorted signals was more serious.
(3) flexibility and autgmentability are poor: for the scale of video wall, the otherness of customer demand is bigger, adopts existing technology to be unfavorable for the design and the manufacturing of video processing equipment.
Summary of the invention
The invention provides method, the system of transmission of a kind of multi-channel video signal and video wall demonstration and obtain and display processing device, so that can solve the transmission cost height, distorted signals and the system flexibility that exist in the prior art and the problem of autgmentability difference.
The method that the embodiment of the invention provides a kind of multi-channel video signal transmission and video wall to show, this method comprises: multi-channel video signal is multiplexed with the single channel digital video signal; The single channel digital video signal is transmitted; The single channel digital video signal is carried out showing at video wall behind the demultiplexing.
The system that the embodiment of the invention provides a kind of multi-channel video signal transmission and video wall to show, comprise that video obtains treatment facility and video display processing device, video obtains and comprises the multiplexing module of vision signal in the treatment facility, wherein, the multiplexing module of vision signal is used for that video is obtained the multi-channel video signal that treatment facility gets access to and carries out multiplexing process, makes it to become the single channel digital video signal; Comprise the vision signal demultiplexing module in the video display processing device, wherein to be used for single channel digital video signal demultiplexing be the multipath digital video signal to the vision signal demultiplexing module.
The embodiment of the invention provides a kind of video to obtain treatment facility, it is characterized in that, this video obtains treatment facility and comprises: the multiplexing module of vision signal, and be used for that video is obtained the multi-channel video signal that treatment facility gets access to and carry out multiplexing process, make it to become the single channel digital video signal; The high bandwidth digital interface is used to transmit the single channel digital video signal.
The embodiment of the invention provides a kind of video display processing device, it is characterized in that, this video obtains treatment facility and comprises: the vision signal demultiplexing module, and be used for that the single channel digital video signal that gets access to is carried out demultiplexing and handle, make it to become the multipath digital video signal; The high bandwidth digital interface is used to receive the single channel digital video signal of transmission.
Adopt the present invention can make multi-channel video system for transmitting cost lower, and transmission and display effect are better.
Description of drawings
Fig. 1 is the structural representation that transmission of the prior art and display packing adopt;
The system construction drawing that multi-channel video signal wire transmission that Fig. 2 provides for the embodiment of the invention and video wall show;
The system construction drawing that multi-channel video signal wireless transmission that Fig. 3 provides for the embodiment of the invention and video wall show;
The system construction drawing that the multi-channel video signal wire/wireless transmits and video wall shows that Fig. 4 provides for the embodiment of the invention;
First kind of video that Fig. 5 provides for the embodiment of the invention obtains the structure chart of treatment facility;
Second kind of video that Fig. 6 provides for the embodiment of the invention obtains the structure chart of treatment facility;
The third video that Fig. 7 provides for the embodiment of the invention obtains the structure chart of treatment facility;
The structure chart of first kind of video display processing device that Fig. 8 provides for the embodiment of the invention;
The structure chart of second kind of video display processing device that Fig. 9 provides for the embodiment of the invention;
The structure chart of the third video display processing device that Figure 10 provides for the embodiment of the invention;
The multi-channel video transmission that Figure 11 provides for the embodiment of the invention and the flow chart of video wall display packing.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The method that the embodiment of the invention provides mainly comprises: multi-channel video signal is multiplexed with the single channel digital video signal; The single channel digital video signal is transmitted; The single channel digital video signal is carried out demultiplexing for demonstration.
Before multi-channel video signal is multiplexed with the single channel digital video signal, need carry out image processing to the multi-channel video signal that gets access to, comprising: processing such as luminance contrast adjusting, noise suppressed, white balance and coding; After multi-channel video signal is multiplexed with the single channel digital video signal, need carry out difference processing to signal, after the processing, can carry out the transmission of wired mode by the high bandwidth digital interface, perhaps utilize signal transmitting module, the single channel digital video signal is sent by wireless transmission method; Utilize signal receiving module to receive the vision signal of transmitting by wireless mode, behind demultiplexing, can directly utilize the Digital Television wall to show, perhaps be converted into analog signal and on the simulated television wall, show by D/A.
Wherein, in the present embodiment, multiplexing and implementation demultiplexing includes but not limited to following several:
One: time division multiplexing and demultiplexing, when adopting time division multiplexing mode, the time of single channel transmission of video signals passage is divided into the some time sheet, and these timeslices are distributed to each road vision signal, each road vision signal is monopolized the video signal transmission passage in the timeslice of oneself.Obtain in the multiplexing module of vision signal of treatment facility inside at video, each road vision signal is multiplexed on the single channel digital signal transmission passage, realize that according to reality needs may the needs synchronous signal transmission, in video display processing device inside, difference according to timeslice, multi-channel video signal is taken out, and be assigned to a plurality of low speed channel transfer.For example: when using SDI (Serial Digital Interface, serial digital interface) signal to transmit the high-definition digital video signal,, can transmit the SD vision signal more than 5 tunnel according to the frequency response of transmission line.
Its two: by channel multiplexing and demultiplexing, when high-definition video signal adopts a plurality of passages to carry out parallel transmission, as DVI (Digital Visual Interface, digital visual interface)/HDMI (High-Definition Multimedia Interface, HDMI (High Definition Multimedia Interface)) adopts four pairs of differential lines synchronous transmission, can adopt the simplest mode, directly use a passage of HD video passage to transmit the SD digital video signal of low speed, in video display processing device inside, the clear vision signal of these road signs is being carried out passing after the conversion of signals.When using single channel DVI/HDMI, can transmit the clear vision signal of four road signs; When using binary channels DVI/HDMI, can transmit the clear vision signal of 7 road signs.
Its three: above-mentioned 1 and 2 method is combined, when high-definition video signal adopts a plurality of channel parallels to transmit, elder generation's using method 1 uses time-multiplexed mode to be superimposed upon on the passage multichannel SD vision signal, re-use method 2 passage of the multichannel SD SD vision signal after the time division multiplexing by high-definition video signal transmitted, high-definition video signal has the multichannel SD vision signal after how many road time division multiplexinges what parallel transmission passages just can transmit.Make in this way, the SD vision signal way of transmitting can be promoted greatly.
Understand for convenience, at first multi-channel video wire transmission and the video wall display system that the embodiment of the invention is provided describes, and first embodiment is:
The system construction drawing that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, this system mainly comprises: video capture device 200, video obtain treatment facility 210, wire transmission medium 220, video display processing device 230 and video display apparatus 240:
Video obtains treatment facility 210, is used for the multi-channel video signal that gets access to is carried out image processing, and multi-channel video signal is multiplexed with the single channel digital video signal; Antijamming capability when transmitting in order to improve signal carries out difference processing to the single channel vision signal, makes it to be converted into differential digital signal; The differential signal that obtains is transmitted by the high bandwidth digital interface;
Video display processing device 230, be used for holding the single channel differential digital vision signal that obtains to carry out demultiplexing to obtaining, make it to revert to multi-channel video signal, directly on numerical display device, show, perhaps it is converted into analog video signal, shows at corresponding analog display device by D/A converter;
Wherein, video obtains the structure of treatment facility 210 can be as shown in Figure 5, and this video obtains treatment facility 210 and can comprise: image processing module 211, the multiplexing module 212 of vision signal, difference processing module 213, high bandwidth digital interface 214.
The multiplexing module 212 of vision signal is used for multi-channel video signal is multiplexed with the single channel digital video signal;
High bandwidth digital interface 214 is used for adopting transmission single channel differential digital vision signal.
Wherein, the structure of video display processing device 230 can be as shown in Figure 8, and this video display processing device 230 can comprise: high bandwidth digital interface 231, vision signal demultiplexing module 232 and D/A modular converter 232.
High bandwidth digital interface 231 is used for adopting transmission single channel differential digital vision signal.
Vision signal demultiplexing module 232 is used for holding the single channel differential digital vision signal that obtains to carry out demultiplexing to obtaining, and makes it to revert to the multipath digital video signal;
D/A modular converter 233 is used for the multipath digital video signal behind the demultiplexing is converted into analog video signal.
Secondly, multi-channel video wireless transmission/display system that another embodiment of the present invention is provided describes.Second embodiment is:
The system construction drawing that Fig. 3 provides for the embodiment of the invention, as shown in Figure 3, this system mainly comprises: video capture device 300, video obtain treatment facility 310, wireless transmission medium 320, video display processing device 330 and video display apparatus 340, wherein video capture device 300, video display apparatus 340 on function and implementation with last embodiment in video capture device 200, video display apparatus 240 identical, do not repeat them here.
Video obtains treatment facility 310, is used for the multi-channel video signal that gets access to is carried out image processing, and multi-channel video signal is multiplexed with the single channel digital video signal; Antijamming capability when transmitting in order to improve signal carries out difference processing to the single channel vision signal, makes it to be converted into differential digital signal; The differential signal that obtains is converted to the signal that is fit to the wireless channel transmission, and sends;
Video display processing device 330, be used for holding the single channel differential digital vision signal that obtains to carry out demultiplexing to obtaining, make it to revert to the multipath digital video signal, perhaps directly on numerical display device, show, perhaps it is converted into analog video signal, shows at corresponding analog display device by D/A converter;
Wherein, video obtains the structure of treatment facility 310 can be as shown in Figure 6, this video obtains treatment facility 310 and can comprise: image processing module 311, the multiplexing module 312 of vision signal, difference processing module 313, high bandwidth digital interface 214 and signal transmitting module 315, wherein image processing module 311, multiplexing module 312 of vision signal and difference processing module 313 on function and implementation all with first embodiment in video obtain image processing module 211 in the treatment facility 210, the multiplexing module 212 of vision signal, difference processing module 213, high bandwidth digital interface 214 is identical, does not repeat them here.
The multiplexing module 312 of vision signal is used for multi-channel video signal is multiplexed with the single channel digital video signal;
High bandwidth digital interface 314 is used for adopting transmission single channel differential digital vision signal.
The structure of video display processing device 330 can be as shown in Figure 9, this video display processing device 330 can comprise: signal receiving module 331, high bandwidth digital interface 332, vision signal demultiplexing module 333 and D/A modular converter 334, wherein high bandwidth digital interface 332, vision signal demultiplexing module 333 and D/A modular converter 334 are identical with high bandwidth digital interface 231, vision signal demultiplexing module 232 and D/A modular converter 233 in the video display processing device 230 among the last embodiment on function and implementation, do not repeat them here.
Secondly, transmission of multi-channel video wire/wireless and video wall display system that further embodiment of this invention is provided describe, and the 3rd embodiment is:
The system construction drawing that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, this system mainly comprises: video capture device 400, video obtains treatment facility 410, wireless transmission medium 420, wire transmission medium 430, video display processing device 440 and video display apparatus 450, wherein video capture device 400, video display apparatus 450 on function and implementation all with first embodiment in video capture device 200, video display apparatus 240 is identical, wire transmission medium 430 is identical with wire transmission medium 220 among first embodiment on function and implementation, wireless transmission medium 420 on function and implementation with second embodiment in wireless transmission medium 320 identical, do not repeat them here.
Video obtains treatment facility 410, is used for the multi-channel video signal that gets access to is carried out image processing, and multi-channel video signal is multiplexed with the single channel digital video signal; Antijamming capability when transmitting in order to improve signal carries out difference processing to the single channel vision signal, makes it to be converted into differential digital signal; The differential signal that obtains is converted to the signal that is fit to the wireless channel transmission, and sends;
Wireless transmission medium 420 is used to transmit single channel differential digital vision signal, can adopt CDMA1X, satellite communication, WiFi, bluetooth modes such as (Bluetooth) to transmit.
Wire transmission medium 430 is used to transmit single channel differential digital vision signal, can use difference cable or optical fiber, and wherein the difference cable can be realized with DVI cable or HDMI cable.
Video display processing device 440, be used for holding the single channel differential digital vision signal that obtains to carry out demultiplexing to obtaining, make it to revert to the multipath digital video signal, perhaps directly on numerical display device, show, perhaps it is converted into analog video signal, shows at corresponding analog display device by D/A converter;
Wherein, video obtains the structure of treatment facility 410 can be as shown in Figure 7, and this video obtains treatment facility 410 and can comprise: image processing module 411, the multiplexing module 412 of vision signal, difference processing module 413, high bandwidth digital interface 414 and signal transmitting module 415.
The multiplexing module 412 of vision signal is used for multi-channel video signal is multiplexed with the single channel digital video signal;
High bandwidth digital interface 314 is used to transmit single channel differential digital vision signal;
Signal transmitting module 415, the differential signal that is used for obtaining are converted to the signal that is fit to the wireless channel transmission, and send.
Wherein, the structure of video display processing device 440 can be as shown in figure 10, and this video display processing device 440 can comprise: signal receiving module 441, high bandwidth digital interface 442, vision signal demultiplexing module 443 and D/A modular converter 444.
Signal receiving module 441 is used to receive the single channel digital video signal that wireless channel transmits, and makes it to return to signal transmitting module 414 and handles signal form before;
High bandwidth digital interface 442 is used to transmit the single channel differential digital vision signal behind the demultiplexing;
Vision signal demultiplexing module 443 is used for the single channel differential digital vision signal that acquires by wired or wireless mode is carried out demultiplexing, makes it to revert to the multipath digital video signal;
D/A modular converter 444 is used for the multipath digital video signal behind the demultiplexing is converted into analog video signal.
Be example with particular flow sheet shown in Figure 11 below, the method that the embodiment of the invention provides is carried out concrete description.As shown in Figure 5, this method can may further comprise the steps:
Step 510: multi-channel video signal is multiplexed with the single channel digital video signal;
This step is to utilize the processing through graphics processing unit of video image that video capture device obtains, obtain having the video image of certain video quality, and utilize the multiplexing module of vision signal to carry out multiplexing to multi-channel video signal, make it to be converted into the single channel digital video signal, and by the signal after multiplexing is carried out difference processing, make it to be converted into the stronger signal of antijamming capability in transmission course, for wire transmission, need to adopt the digital interface of high bandwidth that the signal that will transmit is changed, for wireless transmission, by carrying out source encoding and chnnel coding, make it to be converted into the signal form that is adapted at transmitting in the wireless channel;
Step 520: the single channel digital video signal is transmitted;
In this step, the single channel digital video signal transmitted to utilize wired or wireless transmission means, for wired transmission means, the differential signal that utilizes the difference cable transmission to obtain through difference processing, can also adopt optical fiber to transmit, before transmission, need to adopt optical-electrical converter, be light signal with the electrical signal conversion of carrying video information; For wireless transmission means, can adopt CDMA1X, satellite communication, WiFi, bluetooth modes such as (Bluetooth) to transmit.
Step 530: the single channel digital video signal is carried out demultiplexing for demonstration.
In this step, carry out demultiplexing, make it to be converted into the multipath digital video signal,, can directly utilize the multipath digital video display device to show for the signal that obtains by the digital video multiplexed signals that will receive; Also the multipath digital video signal that obtains can be utilized D/ Λ modular converter to be converted to analog video signal, can pass through general coaxial cable like this, send into the multi-channel analog video display apparatus and demonstrate.Wherein, this multi-channel analog video display apparatus can be simulated television wall or Digital Television wall.
By above description as can be seen, in embodiments of the present invention, carry out image processing by the multi-channel video signal that video capture device is obtained, digital video signal after obtaining handling, carrying out this multipath digital video signal multiplexing, be translated into the single channel digital video signal, it is carried out difference processing be converted into single channel differential digital vision signal, and be transferred to by single channel wire message way or wireless channel and carry out demultiplexing in the video display processing device and handle, recover the multipath digital video signal thus, utilize video display apparatus to show then.Adopt this programme can avoid the problem of cost height, distorted signals and flexibility autgmentability difference in the multiplexing of the prior art.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (16)
1. the method for multi-channel video signal transmission and video wall demonstration is characterized in that this method comprises:
Multi-channel video signal is multiplexed with the single channel digital video signal;
The single channel digital video signal is transmitted;
The single channel digital video signal is carried out showing at video wall behind the demultiplexing.
2. method according to claim 1 is characterized in that, it is wired or wireless transmission means that the single channel digital video signal is carried out transmission manner.
3. method according to claim 2 is characterized in that, the transmission medium that described wire transmission mode adopted is coaxial cable, difference cable or optical fiber, and wherein the difference cable can adopt DVI or HDMI cable.
4. method according to claim 2 is characterized in that the wireless transmission method that is adopted comprises: CDMA1X, satellite communication, WiFi or bluetooth (Bluetooth).
5. method according to claim 1 is characterized in that, the multi-channel video signal after the demultiplexing is sent into the Digital Television wall display equipment show.
6. method according to claim 1, it is characterized in that, the single channel digital signal is being carried out also comprising after the demultiplexing: the vision signal after the demultiplexing is carried out the D/A conversion, make it to become analog video signal, analog video signal is sent into the simulated television wall display equipment show.
7. the system of multi-channel video signal transmission and video wall demonstration, comprise that video obtains treatment facility and video display processing device, it is characterized in that, video obtains and comprises the multiplexing module of vision signal in the treatment facility, wherein, the multiplexing module of vision signal is used for that video is obtained the multi-channel video signal that treatment facility gets access to and carries out multiplexing process, makes it to become the single channel digital video signal; Comprise the vision signal demultiplexing module in the video display processing device, wherein to be used for single channel digital video signal demultiplexing be the multipath digital video signal to the vision signal demultiplexing module.
8. system according to claim 7, it is characterized in that, video obtains treatment facility and comprises image processing module and difference processing module, wherein image processing module is used for the multi-channel video signal that gets access to is carried out corresponding image processing, and the difference processing module is used for the single channel digital video signal after multiplexing is carried out difference processing; The video display processing device comprises demultiplexing module, and wherein to be used for to single channel digital signal demultiplexing be multi-channel video signal to demultiplexing module.
9. system according to claim 7 is characterized in that, described video obtains treatment facility and also comprises the high bandwidth digital interface, is used to transmit the single channel digital video signal.
10. system according to claim 7 is characterized in that, described video obtains treatment facility and also comprises signal transmitting module, is used for the single channel digital video signal is carried out wireless transmission; Described video display processing device also comprises signal receiving module, is used for receiving the single channel digital video signal that wireless channel transmits.
11. system according to claim 7 is characterized in that, the video display processing device comprises the Digital Television wall display equipment, is used for the multipath digital video signal behind the demultiplexing is shown.
12. system according to claim 7, it is characterized in that, the video display processing device also comprises D/A modular converter and simulated television wall display equipment, wherein the D/A modular converter is used for multi-channel video signal is converted to analog video signal, and the simulated television wall display equipment is used for the analog video signal after the conversion is shown.
13. a video obtains treatment facility, it is characterized in that, this video obtains treatment facility and comprises:
The multiplexing module of vision signal is used for that video is obtained the multi-channel video signal that treatment facility gets access to and carries out multiplexing process, makes it to become the single channel digital video signal;
The high bandwidth digital interface is used to transmit the single channel digital video signal.
14. video according to claim 13 obtains treatment facility, it is characterized in that, wherein the high bandwidth digital interface comprises DVI digital interface and HDMI digital interface.
15. a video display processing device is characterized in that, this video obtains treatment facility and comprises:
The vision signal demultiplexing module is used for that the single channel digital video signal that gets access to is carried out demultiplexing and handles, and makes it to become the multipath digital video signal;
The high bandwidth digital interface is used to receive the single channel digital video signal of transmission.
16. video according to claim 15 obtains treatment facility, it is characterized in that, the high bandwidth digital interface comprises DVI digital interface and HDMI digital interface.
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| CNA2007101240623A CN101150727A (en) | 2007-10-19 | 2007-10-19 | Multi-channel video signal transmission and TV wall display method, system and processing device |
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| CN108737746B (en) * | 2018-05-04 | 2020-09-04 | 威创集团股份有限公司 | Signal processing method, signal processing device, computer equipment and storage medium |
| CN111355930A (en) * | 2020-03-16 | 2020-06-30 | 浙江大华技术股份有限公司 | Analog video processing method, system and device |
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| CN114189658A (en) * | 2021-12-09 | 2022-03-15 | 中国船舶科学研究中心 | Video acquisition, transmission and reproduction system for deep-sea manned submersible |
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