CN100525453C - Video telecommunication system and method based on HDMI interface - Google Patents
Video telecommunication system and method based on HDMI interface Download PDFInfo
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- CN100525453C CN100525453C CN 200710118877 CN200710118877A CN100525453C CN 100525453 C CN100525453 C CN 100525453C CN 200710118877 CN200710118877 CN 200710118877 CN 200710118877 A CN200710118877 A CN 200710118877A CN 100525453 C CN100525453 C CN 100525453C
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Abstract
The system comprises a sending end and a receiving end both connected via an IP network; said sending end gets the original data of the HD video source via HDMI interface, encodes the original video data through a HD video encoder, and transmits the encoded data to the receiving end; said receiving end decodes the received data via a decoder, processes it via a video post processor, and outputs it to a display device with HDMI interface.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of video communication system and method that collects high definition video collecting, transmits and be shown as one based on the HDMI interface, this system and method is gathered based on HDMI and is shown.Wherein, described HDMI is meant a kind of HDMI (High Definition Multimedia Interface) (High Definition Multimedia Interface).
Background technology
HD video is a kind of emerging market demand, has vast potential for future development and huge market capacity.Along with the rise of high definition video collecting equipment (as high definition digital camera, high-definition digital video camera etc.), the definition of video image is more and more higher.But in the existing multimedia video communication system, still continue to use standard definition video interface and ordinary video encoding and decoding standard, the image and the video (as 1920 * 1080i or 720p) of high definition are compressed into standard definition resolution (as 4CIF), the display device that is input to common resolution by SD video interface (as VGA, DVI etc.) shows then.Cause the loss of video image details so inevitably, can't arrive the purpose that real high definition shows.
The acquisition of high-definition video signal, relate to multiple different technology such as collection, transmission and demonstration, data volume is big because the HD video communication system has, real-time requires characteristics such as height, make the collection and the transmission of high-definition video signal have bigger technical difficulty, therefore also become the key factor that the restriction HD video is experienced.
HDMI (HDMI (High Definition Multimedia Interface)) can provide the data transfer bandwidth up to 5Gbps, guaranteeing to be enough to deal with a 1080P (audio signal of 1920 * 1080P) video and one 8 sound channel with the high-resolution video and the multichannel audio data of digital form transmission uncompressed under the high-quality situation.And HDMI has also increased the support to HDCP (HDCP), and better DDC (data display channel) is provided optional function simultaneously.These all provide technical support for demand for experience and some application that definition is had relatively high expectations that people improve day by day.
Simultaneously, MPEG-4, H.264, high definition video encoding and decoding standard such as VC-1 or AVS also provides the real-time guarantee for the transmission of HD video, can effectively transmit high-definition video signal.
Summary of the invention
The present invention is directed to the defective or the deficiency that exist in the prior art, a kind of video communication system based on the HDMI interface that collects high definition video collecting, transmits and be shown as one is provided, adopt this system can realize collection, transmission and the demonstration of high-definition video signal, and perfect by improving, this system also has characteristics such as video quality height, real-time are good.
The present invention also provides a kind of video communication method based on the HDMI interface.
The total technical conceive of the present invention is based on HDMI interface and IP network, to utilize the HD video source, high-definition video signal codec and the display device with HDMI interface, collection, transmission and the demonstration of realization high-definition video signal.
Technical scheme of the present invention is as follows:
Video communication system based on the HDMI interface is characterized in that: comprise by IP network interconnected transmitting terminal and receiving terminal; Described transmitting terminal obtains HD video source initial data by the HDMI interface, and be transferred to receiving terminal after by the HD video coding module this original video data being encoded, described receiving terminal is decoded by the video decode module to the data that receive and is handled by the later stage video processing module, and the data after will handling output to the display device demonstration with HDMI interface; Described HDMI interface comprises: the coding of HDMI sends chip, and the coding that video, audio frequency and auxiliary signal are sent into HDMI sends chip, carries out digital coding; 3 road TMDS data channel and 1 road TMDS clock passage, data after will encoding by 3 road TMDS data channel and 1 road TMDS clock passage are sent to signal receiving end, described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMDS data channel transmit is carried out the recovered frequency reference; The HDMI decoding chip of receiving terminal is used for data decode, with corresponding audio signal reduction and deliver in the corresponding processing module.
Described HDMI interface has following architecture: comprise 3 independently communication ports: be used for transmitting the TMDS passage of audio/video data and auxiliary data, described TMDS is the abbreviation of minimum translation difference sub-signal; Being used for when automatic configuration transmitting terminal reads the DDC passage of the EDID data structure of receiving terminal, described DDC is the abbreviation of data display channel, described EDID is the abbreviation of expanded display recognition data, and it is a kind of data format, comprises the parameter of relevant terminal equipment and performance thereof; Be used for supporting the CEC passage of advanced level user's function, described CEC is the abbreviation of user's electronic control, and it is an optional passage.
Described advanced level user function comprises infrared remote control.
Corresponding processing module is meant HD video display terminal or HD video encoder.
Described auxiliary signal comprises field, line synchronizing signal.
Described later stage video processing module comprises following function: decoded video data is carried out level and smooth noise reduction, and/or the image quality enhancement process of contrast enhancing.
Described IP network comprises wired IP network and/or Wireless IP network; The resolution of described original video data is the high clear video image of 1440 * 1080i or 1920 * 1080i or 1280 * 720P or 1920 * 1080P; Described video encoding module and video decode module adopt MPEG-4, H.264, the HD video encoding and decoding standard of VC-1 or AVS.
HD video communication means based on HDMI is characterized in that may further comprise the steps: step 1 by having the high definition video collecting equipment of HDMI interface, obtains original HD video data; Described HDMI interface comprises: the coding of HDMI sends chip, and the coding that video, audio frequency and auxiliary signal are sent into HDMI sends chip, carries out digital coding; 3 road TMDS data channel and 1 road TMDS clock passage, data after will encoding by 3 road TMDS data channel and 1 road TMDS clock passage are sent to signal receiving end, described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMDS data channel transmit is carried out the recovered frequency reference; The HDMI decoding chip of receiving terminal is used for data decode, with corresponding audio signal reduction and deliver in the corresponding processing module; Step 2 nondestructively sends to coding module with original HD video data by the HDMI interface; Step 3 is carried out video coding to initial data; Step 4, the video flowing after transmitting terminal will be encoded sends to receiving terminal by IP network; Step 5, receiving terminal is by the video data behind the IP network received code; Step 6 starts decoder module the video data that receives is decoded; Step 7 is carried out the later stage Video processing to decoded video data; Step 8 is transferred to the HD video display device with the processed video data by the HDMI interface and shows.
The resolution of described original video data is the high clear video image of 1440 * 1080i or 1920 * 1080i or 1280 * 720P or 1920 * 1080P; Described video encoding module and video decode module adopt MPEG-4, H.264, the HD video encoding and decoding standard of VC-1 or AVS.
Technique effect of the present invention is as follows:
1. directly original video data is handled, time delay is little, and real-time is good;
2. directly original image is carried out encoding process, the video quality height.
3. through after the later stage Video processing, adopt HDMI to output to the display device with HDMI interface and show that the clear jade-like stone of picture is saturating, also the proper mass height has solved the problem of distortion of HD video picture color and float.
Description of drawings
Fig. 1 is a system block diagram of the present invention.
Fig. 2 is a system works functional-block diagram of the present invention, and numeral 1 to 7 is a flow sequence number in the square frame.
Fig. 3 is the block diagram of HDMI interface among the present invention.
Reference numeral lists as follows:
The 100-video source, 200-transmitting terminal, 300-IP network, 400-receiving terminal, 500-display device.
Embodiment
The present invention is based on the video communication system of HDMI interface, based on HDMI interface and IP network, utilize the HD video source, high-definition video signal codec and HDMI display device are realized collection, transmission and the demonstration of high-definition video signal.
This system comprises by IP network interconnected transmitting terminal and receiving terminal based on the HDMI interface; Described transmitting terminal obtains HD video source initial data by the HDMI interface, and be transferred to receiving terminal after by the HD video coding module this original video data being encoded, described receiving terminal outputs to the display device with HDMI interface at last and shows by video decode module and later stage Video processing.Described HDMI is the abbreviation of High Definition Multimedia Interface (HDMI (High Definition Multimedia Interface)).Described IP network comprises wired IP network and/or Wireless IP network.
The resolution of described original video data is the high clear video image of 1440 * 1080i or 1920 * 1080i or 1280 * 720P or 1920 * 1080P or extended formatting.
Described video encoding module and video decode module adopt MPEG-4, H.264, high definition video encoding and decoding standards such as VC-1 or AVS.
Described receiving terminal also comprises processing module afterwards, and this module is carried out level and smooth noise reduction to decoded video data, image quality enhancement process such as contrast enhancing.
Described display device is meant the HD video display device with HDMI interface.
As shown in Figure 1, the present invention is based on the video communication system of HDMI interface, this system is based on the HDMI interface, and it comprises: 100-video source, 200-transmitting terminal, 300-IP network, 400-receiving terminal, 500-display device.Wherein, described video source 100 links to each other by the transmission line with HDMI interface with transmitting terminal 200; Transmitting terminal 200, receiving terminal 400 is interconnected by IP network 300; Receiving terminal 400 links to each other by the transmission line with HDMI interface with display device 500.
The output interface of described video source 100 is the HDMI interface.
The input interface of described transmitting terminal 200 is the HDMI interface, and output interface is the IP network interface.
The input interface of described receiving terminal 400 is the IP network interface, and output interface is the HDMI interface.
The input interface of described display device 500 is the HDMI interface.
The function that described transmitting terminal 200 is realized comprises:
(1) collection of high-definition video signal obtains original video data;
(2) by the HDMI interface original video data is nondestructively sent to coding module;
(3) starting video encoding module encodes to original video data;
(4) video data after will encoding is sent to receiving terminal 400 by IP network 300.
The function that described receiving terminal 400 is realized comprises:
(1) receives the HD video code stream by IP network 300;
(2) starting the video decode module decodes;
(3) decoded video data is carried out the later stage Video processing;
(4) use display device to show the high definition picture with HDMI interface.
The present invention is based on the HD video communication means of HDMI, it comprises:
(1) collection of high-definition video signal obtains original video data;
(2) by the HDMI interface original video data is nondestructively sent to coding module,, improve video quality so that directly original video data is handled;
(3) start video encoding module and respectively data are encoded, so that Network Transmission improves real-time;
(4) video data after will encoding is sent to receiving terminal 400 by IP network 300;
(5) receive the HD video code stream by IP network 300;
(6) starting the video decode module decodes;
(7) decoded data are carried out the later stage Video processing;
(8) use display device to show the high definition picture with HDMI interface.
As shown in Figure 2, the operation principle that the present invention is based on the video communication system of HDMI interface is:
1, the collection of high-definition video signal, obtain original video data, its resolution is: the high clear video image of 1440 * 1080i or 1920 * 1080i or 1280 * 720P or 1920 * 1080P or extended formatting, and by the HDMI interface with original HD video data lossless send to coding module;
2, transmitting terminal is encoded to initial data, can carry out video coding by encoder (MPEG-4, H.264, VC-1 or AVS);
3, transmitting terminal is sent to receiving terminal with video data by IP network 300;
4, receiving terminal is by IP network 300 receiving video datas;
5, receiving terminal is decoded to video data, can carry out video decode by decoder (MPEG-4, H.264, VC-1 or AVS);
6, receiving terminal carries out the later stage Video processing to decoded data;
7, receiving terminal shows the high definition picture by the HDMI interface.
As can be seen from Figure 2, the HDMI of step 1 collection, the video coding of step 2 and the transmission of step 3 are finished by transmitting terminal, and the post-processed of the reception of step 4, the video decode of step 5, step 6 and the HDMI of step 7 demonstration are finished by receiving terminal.
As shown in Figure 3, the architecture of HDMI interface among the present invention, it comprises 3 independently communication port: TMDS, DDC and CEC.
Described TMDS is the abbreviation of Transition Minimized Differential Signal (minimum translation difference sub-signal), and the TMDS passage is used for transmitting audio/video data and auxiliary data.
Described DDC is the abbreviation of Digital Display Channel (data display channel), and the DDC passage is used for when automatic configuration transmitting terminal and reads the EDID data structure of receiving terminal.Described EDID is the abbreviation of Extended Display IdentificationData (expanded display recognition data), and it is a kind of data format, comprises the parameter of relevant terminal equipment and performance thereof.
Described CEC is the abbreviation of Consumer Electronics Control (user's electronic control), and the CEC passage is an optional passage, is used for supporting some advanced level user's functions, as infrared remote control etc.
The HDMI interface comprises among the present invention: the coding of HDMI sends chip, and the coding that video, audio frequency and auxiliary signal are sent into HDMI sends chip, carries out digital coding; 3 road TMDS data channel and 1 road TMDS clock passage, data after will encoding by 3 road TMDS data channel and 1 road TMDS clock passage are sent to signal receiving end, described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMDS data channel transmit is carried out the recovered frequency reference; The HDMI decoding chip of receiving terminal is used for data decode, with corresponding audio signal reduction and deliver in the corresponding processing module.Corresponding processing module is meant HD video display terminal or HD video encoder.Auxiliary signal comprises field, line synchronizing signal.
The audio/video transport stream signal journey of HDMI interface among the present invention, its feature comprises:
(1) video, audio frequency and auxiliary signal (as field, line synchronizing signal) are sent into the coding transmission chip of HDMI, carry out digital coding;
(2) pass through 3 road TMDS data channel and 1 road TMDS clock channel transfer to signal receiving end.Described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMS data channel transmit is carried out the recovered frequency reference;
(3) the HDMI decoding chip of receiving terminal carries out data decode, with corresponding audio signal reduction and deliver in the corresponding processing module (as HD video display terminal or HD video encoder).
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.Therefore, although this specification has been described in detail the present invention with reference to accompanying drawing, but, those skilled in the art are to be understood that, still can make amendment or be equal to replacement the present invention, for example, the receiving terminal in the accompanying drawing is only indicated one situation, but obvious many networkings often in reality is implemented; In addition, transmitting terminal and receiving terminal also can be integrated on same the PC.And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of the protection range of patent of the present invention.
Claims (9)
1. based on the video communication system of HDMI interface, it is characterized in that: comprise by IP network interconnected transmitting terminal and receiving terminal; Described transmitting terminal obtains HD video source initial data by the HDMI interface, and be transferred to receiving terminal after by the HD video coding module this original video data being encoded, described receiving terminal is decoded by the video decode module to the data that receive and is handled by the later stage video processing module, and the data after will handling output to the display device demonstration with HDMI interface; Described HDMI interface comprises: the coding of HDMI sends chip, and the coding that video, audio frequency and auxiliary signal are sent into HDMI sends chip, carries out digital coding; 3 road TMDS data channel and 1 road TMDS clock passage, data after will encoding by 3 road TMDS data channel and 1 road TMDS clock passage are sent to signal receiving end, described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMDS data channel transmit is carried out the recovered frequency reference; The HDMI decoding chip of receiving terminal is used for data decode, with corresponding audio signal reduction and deliver in the corresponding processing module.
2. the video communication system based on the HDMI interface according to claim 1, it is characterized in that: described HDMI interface has following architecture: comprise 3 independently communication ports: be used for transmitting the TMDS passage of audio/video data and auxiliary data, described TMDS is the abbreviation of minimum translation difference sub-signal; Being used for when automatic configuration transmitting terminal reads the DDC passage of the EDID data structure of receiving terminal, described DDC is the abbreviation of data display channel, described EDID is the abbreviation of expanded display recognition data, and it is a kind of data format, comprises the parameter of relevant terminal equipment and performance thereof; Be used for supporting the CEC passage of advanced level user's function, described CEC is the abbreviation of user's electronic control, and it is an optional passage.
3. the video communication system based on the HDMI interface according to claim 2 is characterized in that: described advanced level user function comprises infrared remote control.
4. the video communication system based on the HDMI interface according to claim 1 is characterized in that: corresponding processing module is meant HD video display terminal or HD video encoder.
5. the video communication system based on the HDMI interface according to claim 1 is characterized in that: described auxiliary signal comprises field, line synchronizing signal.
6. the video communication system based on the HDMI interface according to claim 1 is characterized in that: described later stage video processing module comprises following function: decoded video data is carried out level and smooth noise reduction, and/or the image quality enhancement process of contrast enhancing.
7. the video communication system based on the HDMI interface according to claim 1 is characterized in that: described IP network comprises wired IP network and/or Wireless IP network; The resolution of described original video data be 1440 * 1080i or 1920 *
The high clear video image of 1080i or 1280 * 720P or 1920 * 1080P; Described video encoding module and video decode module adopt MPEG-4, H.264, the HD video encoding and decoding standard of VC-1 or AVS.
8. based on the HD video communication means of HDMI, it is characterized in that may further comprise the steps: step 1 by having the high definition video collecting equipment of HDMI interface, obtains original HD video data; Described HDMI interface comprises: the coding of HDMI sends chip, and the coding that video, audio frequency and auxiliary signal are sent into HDMI sends chip, carries out digital coding; 3 road TMDS data channel and 1 road TMDS clock passage, data after will encoding by 3 road TMDS data channel and 1 road TMDS clock passage are sent to signal receiving end, described TMDS clock passage is used to transmit the video pixel clock signal, as receiving terminal the data that 3 road TMDS data channel transmit is carried out the recovered frequency reference; The HDMI decoding chip of receiving terminal is used for data decode, with corresponding audio signal reduction and deliver in the corresponding processing module; Step 2 nondestructively sends to coding module with original HD video data by the HDMI interface; Step 3 is carried out video coding to initial data; Step 4, the video flowing after transmitting terminal will be encoded sends to receiving terminal by IP network; Step 5, receiving terminal is by the video data behind the IP network received code; Step 6 starts decoder module the video data that receives is decoded; Step 7 is carried out the later stage Video processing to decoded video data; Step 8 is transferred to the HD video display device with the processed video data by the HDMI interface and shows.
9. the HD video communication means based on HDMI according to claim 8 is characterized in that: the resolution of described original video data is the high clear video image of 1440 * 1080i or 1920 * 1080i or 1280 * 720P or 1920 * 1080P; Described video encoding module and video decode module adopt MPEG-4, H.264, the HD video encoding and decoding standard of VC-1 or AVS.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710118877 CN100525453C (en) | 2007-06-13 | 2007-06-13 | Video telecommunication system and method based on HDMI interface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200710118877 CN100525453C (en) | 2007-06-13 | 2007-06-13 | Video telecommunication system and method based on HDMI interface |
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| CN101076123A CN101076123A (en) | 2007-11-21 |
| CN100525453C true CN100525453C (en) | 2009-08-05 |
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| CN 200710118877 Expired - Fee Related CN100525453C (en) | 2007-06-13 | 2007-06-13 | Video telecommunication system and method based on HDMI interface |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2940735B1 (en) * | 2008-12-31 | 2012-11-09 | Sagem Comm | METHOD FOR LOCALLY DIFFUSING AUDIO / VIDEO CONTENT BETWEEN A SOURCE DEVICE EQUIPPED WITH AN HDMI CONNECTOR AND A RECEIVER DEVICE |
| CN101883236B (en) * | 2010-07-14 | 2012-11-28 | 深圳市高斯贝尔家居智能电子有限公司 | High-definition signal wireless transmission system and method |
| JP5598220B2 (en) * | 2010-09-30 | 2014-10-01 | ソニー株式会社 | Transmission device, transmission method, reception device, reception method, and transmission / reception system |
| CN103219625B (en) * | 2012-01-20 | 2016-12-14 | 北京凯新创达科技发展有限公司 | A kind of HDMI and control signal list netting twine extender |
| CN105227888A (en) * | 2015-09-25 | 2016-01-06 | 山东超越数控电子有限公司 | A kind of dispensing device of VGA vision signal, receiving system and transmission system |
| CN105657315A (en) * | 2015-12-29 | 2016-06-08 | 龙迅半导体（合肥）股份有限公司 | Data transmission method and device, and HDMI single cable extender |
| CN107105185A (en) * | 2017-04-18 | 2017-08-29 | 深圳创维－Rgb电子有限公司 | The transmission method and device of vision signal |
| CN107249113B (en) * | 2017-07-24 | 2023-07-18 | 深圳朗田亩半导体科技有限公司 | Signal extension method and system |
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