CN109640004B - Low-bandwidth computer video transmission method and system - Google Patents
Low-bandwidth computer video transmission method and system Download PDFInfo
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- CN109640004B CN109640004B CN201910070907.8A CN201910070907A CN109640004B CN 109640004 B CN109640004 B CN 109640004B CN 201910070907 A CN201910070907 A CN 201910070907A CN 109640004 B CN109640004 B CN 109640004B
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- 238000000034 method Methods 0.000 title claims abstract description 21
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- 230000003190 augmentative effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 6
- 238000004590 computer program Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video stream to a specific local network, e.g. a Bluetooth® network
- H04N21/43632—Adapting the video stream to a specific local network, e.g. a Bluetooth® network involving a wired protocol, e.g. IEEE 1394
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The application provides a low-bandwidth computer video transmission method and a low-bandwidth computer video transmission system, wherein the method comprises the following steps: dividing the video signal of each computer into two paths of completely same signals, wherein one path of the completely same signals is directly displayed on a computer display screen, and the other path of the completely same signals is output as a split-screen signal; through the video switching matrix, the input m paths of computer video signals are switched into the output n paths of computer video signals; displaying the output n paths of computer video signals on a local display; and/or, encoding one or more paths of the output n paths of computer video signals, transmitting the encoded signals to a far-end for decoding, and displaying the decoded signals on a far-end display. The technical scheme can effectively reduce the time delay of the multi-channel video signals during local display, eliminate compression loss and reduce the network resource occupancy rate of remote transmission.
Description
Technical Field
The present application relates to the field of information transmission, and in particular, to a method and system for transmitting a low-bandwidth computer video.
Background
At present, video information of a computer is mainly transmitted by adopting interfaces such as VGA (video graphics array), DVI (digital visual interface) and the like, and a VGA or DVI cable is adopted for connection between a host computer and a display, so that the transmission distance is short, and when the switching times are more, the transmission distance is usually within 10 meters; the simultaneous transmission mode is usually a point-to-point mode, and information is difficult to be used by different users at the same time. When computer video information needs to be transmitted to a remote end for use while the current use of a user is not influenced, the following two transmission modes are generally adopted: 1. a shunt circuit and a driving circuit are added to VGA and DVI interfaces, the driving capability of signals is enhanced, and the transmission distance can be increased to 100 meters; 2. the VGA signal and DVI signal are coded into IP signal by adding coding circuit to VGA and DVI interface, and the transmission distance can be increased to 1000 km or even more by network exchange. The transmission distance of the 1 st mode is short, the special channel is used for transmission, no time delay exists, and the method is suitable for local split screen; the 2 nd mode has long transmission distance, does not need a special channel, only uses a general Ethernet channel, has time delay in transmission because of the need of corresponding encoding, decoding and network exchange processes, and simultaneously reduces the signal quality to a certain extent due to compression encoding, thereby being suitable for remote use.
When multiple paths of computer video information are required to be used in a local split screen mode and a remote mode at the same time, the requirement for remote transmission cannot be met only by adopting the mode 1; only by adopting the 2 nd mode, a plurality of paths of video signals occupy a large amount of network resources, and unnecessary time delay and compression loss are introduced when the local split screen is used.
Disclosure of Invention
To solve one of the above problems, the present application provides a low-bandwidth computer video transmission method and system.
According to a first aspect of embodiments of the present application, there is provided a low-bandwidth computer video transmission method, comprising the steps of:
dividing the video signal of each computer into two paths of completely same signals, wherein one path of the completely same signals is directly displayed on a computer display screen, and the other path of the completely same signals is output as a split-screen signal;
through the video switching matrix, the input m paths of computer video signals are switched into the output n paths of computer video signals;
displaying the output n paths of computer video signals on a local display; and/or, encoding one or more paths of the output n paths of computer video signals, transmitting the encoded signals to a far-end for decoding, and displaying the decoded signals on a far-end display.
Preferably, the method further comprises the steps of: and performing impedance matching and drive enhancement processing on the frequency division signal according to the transmission distance of the video signal.
Preferably, each split screen signal is increased by a drive enhancement of at least 10 meters or more.
Preferably, the video switching matrix is an m × n video matrix.
Preferably, the step of encoding one or more of the n computer video signals, transmitting to a remote end for decoding, and displaying on a remote end display comprises:
performing IP coding on one or more paths of the n paths of computer video signals;
transmitting the encoded video signal to a remote user through various channels connected to a network switch;
the encoded video signal is decoded at the remote end and displayed on a remote display.
According to a second aspect of embodiments of the present application, there is provided a low bandwidth computer video transmission system, the system comprising:
the video signal of each computer is divided into two paths of completely same signals by the plurality of shunt interfaces, one path of signal is directly displayed on a computer display screen, and the other path of signal is output as a split screen signal;
the conversion module is used for randomly switching the input m paths of computer video signals into output n paths of computer video signals through the video switching matrix;
displaying the output n paths of computer video signals on a local display; and/or, encoding one or more paths of the output n paths of computer video signals, transmitting the encoded signals to a far-end for decoding, and displaying the decoded signals on a far-end display.
Preferably, the system further comprises: and the coding device is used for coding one or more paths of the n paths of computer video signals.
Preferably, the shunt interface is a VGA/DVI interface.
Preferably, each split screen signal is increased by a drive enhancement of at least 10 meters or more.
Preferably, the video switching matrix is an m × n video matrix.
The technical scheme can effectively reduce the time delay of the multi-channel video signals during local display, eliminate compression loss and reduce the network resource occupancy rate of remote transmission.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic diagram of a low-bandwidth computer video transmission method according to the present scheme;
fig. 2 shows a schematic diagram of a low-bandwidth computer video transmission system according to the present solution.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As shown in fig. 1, the present disclosure discloses a multi-input, low-bandwidth computer video information transmission method, which avoids the original signal attenuation caused by split-screen use by performing impedance matching and drive enhancement on a newly added split-screen signal, and supports remote split-screen video signal transmission. The present solution is described in detail below by way of example:
the first step is to divide the computer video signal into two
When the video information of the computer is locally supplied to a single user, the video information is usually connected between the computer host and the display by adopting a VGA cable or a DVI cable according to different VGA interfaces or DVI interfaces. When one path of computer video information needs to be split and then used by other local users or transmitted to a far end for use, a VGA/DVI interface shunt and a driving circuit need to be added.
The computer video interface shunt circuit and the drive circuit are connected in series between the computer and the display. The video interface shunt circuit completes the functions of one path of input and two paths of output, and adds another path of output signal on the premise of not influencing the original output, wherein the added output signal is the copy of the original output signal. The interface driving circuit completes the impedance matching and the driving enhancement function after signal shunting, so that the output original signal is not attenuated, and simultaneously, the newly added split-screen output signal is adjusted to achieve the driving capability of at least more than 10 meters. The driving capability of the newly added output split screen signal can be adjusted according to the difference of the transmission distance.
Second, the video signals of the computer after the multi-channel split screen are switched and output according to the requirement
The video switching matrix is an m multiplied by n video matrix, namely, m paths of input computer video signals are switched into n paths of output computer video signals at will, and the n paths of output signals can be used by other local users. This allows the selective use of the signal source as desired.
Third step for local use of the switched output computer video signal
The computer video signal after switching output can be used by other local users, and can also be coded into an IP signal and then transmitted to a remote end for use.
When local use is required, only the computer video signal after switching output is connected to a display.
Fourthly, the computer video signal after switching output is transmitted to a remote end for use
When the video signal needs to be transmitted to a far end for use, one or more paths of the video signal can be subjected to IP coding by adopting video coding and decoding equipment, then the video signal can be transmitted to a far end user through various channels connected to a network switch, the coding signal at the far end is subjected to decoding operation by adopting the same video coding and decoding equipment, and the decoding signal can be connected to a display for displaying.
Therefore, the multi-input and low-bandwidth computer video information transmission is completed.
In the scheme, the VGA interface or DVI interface is adopted for transmission in the transmission process of the local video signal, so that the network bandwidth is not consumed; in the process of remote video transmission, partial video signals in n paths of computer video signals are transmitted according to requirements, so that the use of network bandwidth is reduced.
The present solution further discloses a low bandwidth computer video transmission system, the system comprising:
the video signal of each computer is divided into two paths of completely same signals by the plurality of shunt interfaces, one path of signal is directly displayed on a computer display screen, and the other path of signal is output as a split screen signal;
the conversion module is used for randomly switching the input m paths of computer video signals into output n paths of computer video signals through the video switching matrix;
the encoding device is used for encoding one or more paths of the n paths of computer video signals;
displaying the n channels of computer video signals on a local display; and/or, encoding one or more paths of the n paths of computer video signals, transmitting the encoded signals to a far-end for decoding, and displaying the decoded signals on a far-end display.
As shown in fig. 2, the DVI or VGA signal outputted from the computer host is divided into two by the video interface shunt and the driving circuit, and after driving and enhancing two paths of the same signal, one path of DVI or VGA signal is sent to the local display for normal display, and the other path of DVI or VGA signal enters the video switching matrix. The video switching matrix outputs n DVI or VGA signals after switching the input m DVI or VGA signals according to the requirements. One part of the output signal is sent to a local display for display, and the other part of the output signal enters a video codec for video coding. The video signal is encoded into an IP signal, and the IP signal is transmitted to a remote end through a wired transmission (such as an optical fiber) or a wireless transmission (such as satellite communication or wireless broadband). The IP signal enters a video coder-decoder at the far end for video decoding, and the decoded signal is converted into a DVI or VGA signal and is sent to a local display for display. This allows for low bandwidth transmission of multiple input computer video signals for simultaneous local and remote display.
The method effectively reduces the time delay of the multi-channel video signals during local display, eliminates the compression loss and reduces the network resource occupancy rate of remote transmission.
The present application is described in terms of flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (9)
1. A method for low bandwidth computer video transmission, the method comprising the steps of:
dividing each path of input m paths of video signals of the computer into two paths of completely same signals, wherein one path of the input m paths of video signals is directly displayed on a computer display screen, the other path of the input m paths of video signals is output as a split screen signal, and impedance matching and drive enhancement processing are carried out on the split screen signal according to the transmission distance of the video signals;
through a video switching matrix, randomly switching input m paths of split screen signals into output n paths of computer video signals; displaying a portion of the output n-way computer video signals on a local display; and encoding the other part of the output n paths of computer video signals, transmitting the encoded part to a far-end for decoding, and displaying the decoded part on a far-end display.
2. The computer video transmission method of claim 1, wherein each split screen signal is augmented with a drive enhancement of at least 10 meters or more.
3. The computer video transmission method according to claim 1, wherein the video switching matrix is an m x n video matrix.
4. The computer video transmission method according to claim 1, wherein said step of encoding one or more of the n output computer video signals, or another portion thereof, for transmission to a remote end for decoding and display on a remote end display comprises:
performing IP coding on one or more paths of the n paths of computer video signals;
transmitting the encoded video signal to a remote user through various channels connected to a network switch;
the encoded video signal is decoded at the remote end and displayed on a remote display.
5. A low bandwidth computer video transmission system, comprising:
the multiple shunting interfaces divide each path of the video signals of the m paths of computers into two paths of completely same signals, wherein one path of the completely same signals is directly displayed on a computer display screen, and the other path of the completely same signals is output as a split screen signal;
the interface driving circuits corresponding to the shunt interfaces perform impedance matching and drive enhancement processing on the split screen signals according to the transmission distance of the video signals;
the conversion module is used for randomly switching the input m paths of split screen signals into output n paths of computer video signals through the video switching matrix;
displaying a portion of the output n-way computer video signals on a local display; and encoding the other part of the output n paths of computer video signals, transmitting the encoded part to a far-end for decoding, and displaying the encoded part on a far-end display.
6. The computer video transmission system of claim 5, further comprising: an encoding device for encoding one or more of the n computer video signals, or another portion thereof.
7. The computer video transmission system of claim 5, wherein the splitter interface is a VGA/DVI interface.
8. The computer video transmission system of claim 5, wherein each split screen signal adds a drive boost of at least 10 meters or more.
9. The computer video transmission system of claim 5, wherein the video switching matrix is an m x n video matrix.
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| CN112165633A (en) * | 2020-09-28 | 2021-01-01 | 山东超越数控电子股份有限公司 | Method and equipment for display signal remote transmission and multi-screen notebook computer |
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