CN203340223U - Video quality evaluation system based on video code stream analysis - Google Patents
Video quality evaluation system based on video code stream analysis Download PDFInfo
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Abstract
The utility model provides a video quality evaluation system based on video code stream analysis. The video quality evaluation system based on video code stream analysis comprises a high-definition video acquisition unit, a standard-definition video acquisition unit, a computer terminal screen acquisition coding unit, a conference IP (Internet Protocol) network, a high-definition video conference terminal and a video quality evaluation unit, wherein the high-definition video acquisition unit is connected with the high-definition video conference terminal and the video quality evaluation unit; the standard-definition video acquisition unit is connected with the high-definition video conference terminal and the video quality evaluation unit; the computer terminal screen acquisition coding unit is connected with the high-definition video conference terminal and the video quality evaluation unit; the conference IP network is connected with the high-definition video conference terminal and external equipment for transmitting a remote video compressed code stream; and the high-definition video conference terminal is connected with the video quality evaluation unit. The video quality evaluation system based on video code stream analysis provided by the utility model has the characteristics of being high in accuracy, objective in evaluation, and the like, and can be widely applied to the video field.
Description
Technical field
The present invention relates to the video assessment technology, particularly relate to a kind of video quality evaluation system of analyzing based on video code flow.
Background technology
Video conference the efficient means of the aspect information interchanges such as video, voice and word is widely used in all trades and professions as realizing between a kind of long-distance user of convenience.Flourish along with the high definition video technology, the HD video meeting has become industry main flow trend.In engineering practice, usually adopt HD video and SD video mutually compatible mode installed.
Video conference is very high to the requirement of real-time, network broadband and network service quality, therefore the quality of video quality has become the key issue that concerns the video conferencing system total quality.In practical application, due to problems such as Network Packet Loss, time delay, shake, video resolution, video encoding/decoding methods, make video quality poor, such as mosaic, Ka Dun or the problem such as asynchronous appear in, video.At present, although China has now tentatively formulated relevant construction and the acceptance criteria of video conferencing, its method for evaluating video quality is fairly simple and coarse, and this method for evaluating video quality also can't analyze the problem link that causes video quality not high clearly.
As can be seen here, in the prior art, there is no higher, the more objective video code flow analysis of precision and video quality evaluation system.
Summary of the invention
In view of this, main purpose of the present utility model is to provide the video quality evaluation system that a kind of precision is higher, evaluation comparison is objectively analyzed based on video code flow.
In order to achieve the above object, the technical scheme the utility model proposes is:
A kind of video quality evaluation system of analyzing based on video code flow, it is characterized in that, described video quality evaluation system comprises for the HD video compressed bit stream by collection and high definition original video and is sent to the HD video conference terminal, the high definition playback video of collection is sent to the high definition video collecting unit of video quality assessment unit, for the SD compressed video stream of collection and SD original video are sent to the HD video conference terminal, the SD playback video of collection is sent to the SD video acquisition unit of video quality assessment unit, for the terminal VGA compressed video stream of collection and terminal VGA original video are sent to the HD video conference terminal, the terminal VGA playback video of collection is sent to the terminal screen capture coding unit of video quality assessment unit, be sent to the meeting IP network of HD video conference terminal for the long-distance video compressed bit stream that will obtain from outside, be used for according to control command the HD video compressed bit stream, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, terminal VGA original video, the long-distance video compressed bit stream switches to video quality assessment unit and storage playback HD video compressed bit stream, the SD compressed video stream, terminal VGA compressed video stream, the HD video conference terminal of long-distance video compressed bit stream, for the HD video compressed bit stream that the HD video conference terminal is sent, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, the high definition playback video that the original VGA video of terminal or long-distance video compressed bit stream and high definition video collecting unit send, the SD playback video that the SD video acquisition unit sends, the digital video image that the terminal VGA playback video that computer screen capturing and coding unit sends obtains after being analyzed carries out subjective quality assessment, objective quality assessment also provides the video quality assessment unit of assessment result, wherein,
High definition video collecting unit the first output connects HD video conference terminal first input end, high definition video collecting unit the second output connects HD video conference terminal the second input, and high definition video collecting unit the 3rd output to the m+2 output connects respectively video quality assessment unit first input end to the m input; SD video acquisition unit the first output connects HD video conference terminal the 3rd input, SD video acquisition unit the second output connects HD video conference terminal four-input terminal, and SD video acquisition unit the 3rd exports the q+2 output to and connects respectively video quality assessment unit m+1 input to the m+q input; Computer screen capturing and coding unit the first output connects HD video conference terminal the 5th input, computer screen capturing and coding unit the second output connects HD video conference terminal the 6th input, and computer screen capturing and coding unit the 3rd output to the r+2 output connects video quality assessment unit m+q+1 input to the m+q+r input; Meeting IP network the first output connects HD video conference terminal the 7th input, and meeting IP network first input end connects the outside equipment output end that sends the long-distance video compressed bit stream; HD video conference terminal the first output connects video quality assessment unit m+q+r+1 input, and HD video conference terminal the second output connects video quality assessment unit m+q+r+2 input.
In sum, the video quality evaluation system based on the video code flow analysis described in the utility model can be carried out subjective evaluation and objective evaluation according to source code flow, compressed bit stream, playback code stream, decoded bit stream to the video quality of high definition, SD, computer screen, the type such as long-range; And during assessment, information source is abundanter, so assessment result is more accurate, also more objective.
The accompanying drawing explanation
The composition structural representation that Fig. 1 is the video quality evaluation system of analyzing based on video code flow described in the utility model.
The composition structural representation that Fig. 2 is high definition video collecting described in the utility model unit.
The composition structural representation that Fig. 3 is SD video acquisition unit described in the utility model.
The composition structural representation that Fig. 4 is computer screen capturing and coding described in the utility model unit.
The composition structural representation that Fig. 5 is HD video conference terminal described in the utility model.
The composition structural representation that Fig. 6 is the flat assessment unit of video quality described in the utility model.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
The composition structural representation that Fig. 1 is the video quality evaluation system of analyzing based on video code flow described in the utility model.As shown in Figure 1, video quality evaluation system based on the video code flow analysis described in the utility model comprises: for the HD video compressed bit stream by collection and high definition original video, be sent to HD video conference terminal 5, the high definition playback video of collection is sent to the high definition video collecting unit 1 of video quality assessment unit 6, for the SD compressed video stream of collection and SD original video are sent to HD video conference terminal 5, the SD playback video of collection is sent to the SD video acquisition unit 2 of video quality assessment unit 6, for the terminal VGA(Video Graphics Array by gathering, Video Graphics Array) compressed video stream and terminal VGA original video are sent to HD video conference terminal 5, the terminal VGA playback video of collection is sent to the terminal screen capture coding unit 3 of video quality assessment unit 6, be sent to the meeting IP network 4 of HD video conference terminal 5 for the long-distance video compressed bit stream that will obtain from outside, be used for according to control command the HD video compressed bit stream, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, terminal VGA original video, the long-distance video compressed bit stream switches to video quality assessment unit 6 and storage playback HD video compressed bit stream, the SD compressed video stream, terminal VGA compressed video stream, the HD video conference terminal 5 of long-distance video compressed bit stream, for the HD video compressed bit stream that HD video conference terminal 5 is sent, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, the high definition playback video that the original VGA video of terminal or long-distance video compressed bit stream and high definition video collecting unit 1 send, the SD playback video that SD video acquisition unit 2 sends, the digital video image that the terminal VGA playback video that computer screen capturing and coding unit 3 sends obtains after being analyzed carries out subjective quality assessment, objective quality assessment also provides the video quality assessment unit 6 of assessment result, wherein,
High definition video collecting unit 1 first output connects HD video conference terminal 5 first input ends, high definition video collecting unit 1 second output connects HD video conference terminal 5 second inputs, and high definition video collecting unit 1 the 3rd output to the m+2 output connects respectively video quality assessment unit 6 first input end to the m inputs; SD video acquisition unit 2 first outputs connect HD video conference terminal 5 the 3rd input, SD video acquisition unit 2 second outputs connect HD video conference terminal 5 four-input terminals, and SD video acquisition unit 2 the 3rd exports the q+2 output to and connects respectively video quality assessment unit 6 m+1 input to the m+q inputs; Computer screen capturing and coding unit 3 first outputs connect HD video conference terminal 5 the 5th input, computer screen capturing and coding unit 3 second outputs connect HD video conference terminal 5 the 6th input, and computer screen capturing and coding unit 3 the 3rd output to the r+2 output connects video quality assessment unit 6 m+q+1 input to the m+q+r inputs; Meeting IP network 4 first outputs connect HD video conference terminal 5 the 7th input, and meeting IP network 4 first input ends connect the outside equipment output end that sends the long-distance video compressed bit stream; HD video conference terminal 5 first outputs connect video quality assessment unit 6 m+q+r+1 inputs, and HD video conference terminal 5 second outputs connect video quality assessment unit 6 m+q+r+2 inputs.Here, m, q, r are natural number.
In a word, the video quality evaluation system based on the video code flow analysis described in the utility model can be carried out subjective evaluation and objective evaluation according to source code flow, compressed bit stream, playback code stream, decoded bit stream to the video quality of high definition, SD, computer screen, the type such as long-range; And during assessment, information source is abundanter, so assessment result is more accurate, also more objective.
The composition structural representation that Fig. 2 is high definition video collecting described in the utility model unit.As shown in Figure 2, high definition video collecting described in the utility model unit 1 comprises: the n road is for being sent to the first high-definition camera 111 of HD video matrix 12 to n high-definition camera 11n by the high definition original video of collection, for n road high definition original video is switched to the first high definition supervision/player 141 on the one hand to m high definition supervision/player 14m, be sent on the other hand the HD video matrix 12 of high definition encoder 13 and HD video conference terminal 5, the HD video compressed bit stream that carries out obtaining after compressed encoding for the high definition original video that will send HD video matrix 12 is sent to the high definition encoder 13 of HD video conference terminal 5, the m road is for storage or playback high definition original video and the high definition playback video obtained is sent to the first high definition supervision/player 141 of described video quality assessment unit 6 to m high definition supervision/player 14m, wherein, m, n are natural number, and n > m,
The first high-definition camera 111 output to the n high-definition camera 11n outputs connect respectively HD video matrix 12 first input end to the n inputs, HD video matrix 12 first output to the m outputs connect respectively the first high definition supervision/player 141 input to the m high definition supervision/player 14m inputs, HD video matrix 12 m+1 outputs connect high definition encoder 13 inputs, HD video matrix 12 m+2 outputs are connected to HD video conference terminal 5 first input ends by described high definition video collecting unit 1 first output, high definition encoder 13 outputs are connected to HD video conference terminal 5 second inputs by described high definition video collecting unit 1 second output, the first high definition supervision/player 141 to m high definition supervision/player 14m output is connected to video quality assessment unit 6 first input end to the m inputs by described high definition video collecting unit 1 the 3rd output to the m+2 output.
In the utility model, the VS-88HDXL3G HD-SDI matrix product of the German Wayne Kramer of HD video matrix 12 employing company.
The composition structural representation that Fig. 3 is SD video acquisition unit described in the utility model.As shown in Figure 3, SD video acquisition unit 2 described in the utility model comprises: the p road is for being sent to the first SD video camera 211 of SD video matrix 22 to p SD video camera 21p by the SD original video of collection, for the clear original video of p road sign is switched to the first SD supervision/player 241 on the one hand to q SD supervision/player 24q, be sent on the other hand the SD video matrix 22 of standard definition coder 23 and HD video conference terminal 5, the SD compressed video stream that carries out obtaining after compressed encoding for the SD original video that will send SD video matrix 22 is sent to the standard definition coder 23 of HD video conference terminal 5, the q road is for storage, playback SD original video also is sent to the first SD supervision/player 241 of described video quality assessment unit 6 to q SD supervision/player 24q by the SD playback video obtained, wherein, p, q are natural number, and p > q,
The first SD video camera 211 output to the p SD video camera 21p outputs connect respectively SD video matrix 22 first input end to the p inputs, SD video matrix 22 first output to the q outputs connect respectively the first SD supervision/player 241 input to the q SD supervision/player 24q inputs, SD video matrix 22 q+1 outputs connect standard definition coder 23 inputs, SD video matrix 22 q+2 outputs are connected to HD video conference terminal 5 the 3rd input by described SD video acquisition unit 2 first outputs, standard definition coder 23 outputs are connected to HD video conference terminal 5 four-input terminals by described SD video acquisition unit 2 second outputs, the first SD supervision/player 241 to q high definition supervision/player 24q output is connected to video quality assessment unit 6 m+1 input to the m+q inputs by described SD video acquisition unit 2 the 3rd output to the q+2 output.
In the utility model, the Sierra Pro1616V5R-XL model rgb matrix switch of the German Wayne Kramer of SD video matrix 2 employing company.
The composition structural representation that Fig. 4 is computer screen capturing and coding described in the utility model unit.As shown in Figure 4, terminal screen capture coding unit 3 described in the utility model comprises: the r road is for being sent to the first terminal computer 311 of VGA video matrix 32 to r terminal computer 31r by the original VGA video of the terminal of collection, for terminal original VGA video in r road being sent to the VGA video matrix 32 of VGA encoder 33 and HD video conference terminal 5, the terminal VGA compressed video stream that carries out obtaining after compressed encoding for the original VGA video of terminal that will send VGA video matrix 32 is sent to the standard definition coder 23 of HD video conference terminal 5, wherein, r is natural number,
First terminal computer 311 output to the r terminal computer 31r outputs connect respectively VGA video matrix 32 first input end to the r inputs on the one hand, connect respectively on the other hand video quality assessment unit 6 m+q+1 output to the m+q+r outputs; VGA video matrix 32 first outputs connect VGA encoder 33 inputs, VGA video matrix 32 second outputs are connected to HD video conference terminal 5 the 5th input by computer screen capturing and coding unit 3 first outputs, and VGA encoder 33 outputs are connected to HD video conference terminal 5 the 6th input by computer screen capturing and coding unit 3 second outputs.
In the utility model, the VP-8x8 type product of the German Wayne Kramer of VGA video matrix 32 employing company.
The composition structural representation that Fig. 5 is HD video conference terminal described in the utility model.As shown in Figure 5, HD video conference terminal 5 described in the utility model comprises: the HD video compressed bit stream and the high definition original video that high definition video collecting unit 1 are sent for the switching command sent according to main control computer 52, SD compressed video stream and SD original video that SD video acquisition unit 2 sends, terminal VGA compressed video stream and terminal VGA original video that computer screen capturing and coding unit 3 sends, the long-distance video compressed bit stream that the meeting IP network sends switches to the multipoint control unit 51 of described video quality assessment unit 6, HD video compressed bit stream for storage 1 transmission of playback high definition video collecting unit, the SD compressed video stream that SD video acquisition unit 2 sends, the terminal VGA compressed video stream that computer screen capturing and coding unit 3 sends, the recorded broadcast of session unit 53 of the long-distance video compressed bit stream that the meeting IP network sends, for send the main control computer 52 of switching command to multipoint control unit 51, wherein,
High definition video collecting unit 1 first output is connected to multipoint control unit 51 first input ends by HD video conference terminal 5 first input ends; High definition video collecting unit 1 second output is connected to multipoint control unit 51 second inputs on the one hand by HD video conference terminal 5 second inputs, is connected on the other hand recorded broadcast of session unit 53 first input ends; SD video acquisition unit 2 first outputs are connected to multipoint control unit 51 the 3rd input by HD video conference terminal 5 the 3rd input; SD video acquisition unit 2 second outputs are connected to multipoint control unit 51 four-input terminals on the one hand by HD video conference terminal 5 four-input terminals, are connected on the other hand recorded broadcast of session unit 53 second inputs; Computer screen capturing and coding unit 3 first outputs are connected to multipoint control unit 51 the 5th input by HD video conference terminal 5 the 5th input; Computer screen capturing and coding unit 3 second outputs are connected to multipoint control unit 51 the 6th input on the one hand by HD video conference terminal 5 the 6th input, are connected on the other hand recorded broadcast of session unit 53 the 3rd input; Meeting IP network 4 first outputs pass through HD video conference terminal 5 the 7th input and are connected on the one hand multipoint control unit 51 the 7th input, are connected on the other hand recorded broadcast of session unit 53 four-input terminals; Main control computer 52 outputs connect multipoint control unit 51 the 8th input; Multipoint control unit 51 first outputs connect video quality assessment unit 6 m+q+r+1 inputs by described HD video conference terminal 5 first outputs, and multipoint control unit 51 second outputs connect video quality assessment unit 6 m+q+r+2 inputs by described HD video conference terminal 5 second outputs.
In practical application, multipoint control unit (MCU, Multi Control Unit) the 51st, the maincenter equipment of all kinds of videoconference system server ends.The video conferencing system of using in specific industry has larger scale usually, needs the tree that the MCU of different stage forms to carry out grading control, and high level MCU system can be controlled the MCU system of low one-level.
In the utility model, the large capacity high definition MCU ZXMVC8900 type product that during multipoint control unit 51 adopts, emerging company produces.、
In the utility model, the coding of high definition and SD vision signal is supported in recorded broadcast of session unit 53 on video format, can meet the recording of SD and HD video meeting, live, program request needs.
The composition structural representation that Fig. 6 is the flat assessment unit of video quality described in the utility model.As shown in Figure 6, video quality assessment described in the utility model unit 6 comprises: for the HD video compressed bit stream that HD video conference terminal 5 is sent, the SD compressed video stream, terminal VGA compressed video stream or long-distance video compressed bit stream carry out (the Real Time Transport Protocol based on RTP, RTP) packet header and TS (transport stream, transport stream) Network Quality Analysis in packet header, and by the parsing HD video compressed bit stream obtained, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream are sent to Video Decoder 62, the subjective evaluation and test of video quality device 63, the video code flow analyzer 61 of video quality objective evaluation and test device, for parsing HD video compressed bit stream, parsing SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream that video code flow analyzer 61 is sent, decoded, and the decoding HD video compressed bit stream obtained, the SD compressed video stream of decoding, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream are sent to the Video Decoder 62 that the video quality subjectivity is evaluated and tested device 63 and video quality objective evaluation and test device 64, for the parsing HD video compressed bit stream sent according to video code flow analyzer 61, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream, the decoding HD video compressed bit stream that Video Decoder sends, decoding SD compressed video stream, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream, the high definition playback video that high definition video collecting unit 1 sends, the SD playback video that SD video acquisition unit 2 sends, the terminal VGA playback video that terminal screen capture coding unit 3 sends adopts two excitation injury tolerance stagings or single excitation continuous mass staging to carry out subjective evaluation, and the subjective evaluation result obtained is sent to the subjective evaluation and test of the video quality device 63 of evaluates calculation machine 65, for the parsing HD video compressed bit stream sent according to video code flow analyzer 61, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream, the decoding HD video compressed bit stream that Video Decoder sends, decoding SD compressed video stream, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream, and the high definition original video of HD video conference terminal 5 transmissions, the original VGA video of SD original video or terminal adopts and entirely with reference to method or without the reference method, carries out objective evaluation, and the objective evaluation result obtained is sent to the video quality objective evaluation and test device 64 of evaluates calculation machine 65, for the subjective evaluation result sent according to the subjective evaluation and test of video quality device 63, the objective evaluation result that video quality objective evaluation and test device 64 sends is determined the report of high clear video image objective quality, the high clear video image subjective quality comprises, the report of SD video image objective quality, the report of SD video image subjective quality, the report of terminal VGA video image objective quality, the report of terminal VGA video image subjective quality, the report of long-distance video image objective quality, the evaluates calculation machine 65 of long-distance video image subjective quality report, wherein,
Video code flow analyzer 61 inputs are connected to HD video conference terminal 5 first input ends by described video quality assessment unit 6 m+q+r+1 inputs, video code flow analyzer 61 first outputs connect Video Decoder 62 inputs, and video code flow analyzer 61 second outputs are connected to the subjective evaluation and test of video quality device 63 first input ends, video quality objective evaluation and test device 64 first input ends, the subjective evaluation and test of Video Decoder 62 output video qualities device 63 second inputs, video quality objective evaluation and test device 64 second inputs, the subjective evaluation and test of video quality device 63 first input end to the m inputs are connected to high definition video collecting unit 1 the 3rd output to the m+2 output by described video quality assessment unit 6 first input end to the m inputs respectively, the subjective evaluation and test of video quality device 63 m+1 input to the m+q inputs are connected to SD video acquisition unit 2 the 3rd by described video quality assessment unit 6 m+1 input to the m+q inputs respectively and export the q+2 output to, the subjective evaluation and test of video quality device 63 m+q+1 input to the m+q+r inputs are connected to computer screen capturing and coding unit 3 the 3rd output to the r+2 output by described video quality assessment unit 6 m+q+1 input to the m+q+r inputs respectively, the subjective evaluation and test of video quality device 63 outputs are connected to evaluates calculation machine 65 first input ends, video quality objective evaluation and test device 64 the 3rd input is connected to HD video conference terminal 5 second outputs by described video quality assessment unit 6 m+q+r+2 inputs, and video quality objective evaluation and test device 64 outputs connect evaluates calculation machine 65 second inputs.
In the utility model, the MPEG test macro MTS400 that video code flow analyzer 61, Video Decoder 62 adopt U.S. Imtech to produce.
In the utility model, two excitation injury tolerance stagings, list encourage the continuous mass staging, entirely with reference to method, nothing, with reference to method, are prior art, repeat no more herein.
In the utility model, the MPEG test macro MTS400 that video quality objective evaluation and test device 64 adopts U.S. Imtech to produce.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection range of the present utility model.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. a video quality evaluation system of analyzing based on video code flow, it is characterized in that, described video quality evaluation system comprises for the HD video compressed bit stream by collection and high definition original video and is sent to the HD video conference terminal, the high definition playback video of collection is sent to the high definition video collecting unit of video quality assessment unit, for the SD compressed video stream of collection and SD original video are sent to the HD video conference terminal, the SD playback video of collection is sent to the SD video acquisition unit of video quality assessment unit, for the terminal VGA compressed video stream of collection and terminal VGA original video are sent to the HD video conference terminal, the terminal VGA playback video of collection is sent to the terminal screen capture coding unit of video quality assessment unit, be sent to the meeting IP network of HD video conference terminal for the long-distance video compressed bit stream that will obtain from outside, be used for according to control command the HD video compressed bit stream, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, terminal VGA original video, the long-distance video compressed bit stream switches to video quality assessment unit and storage playback HD video compressed bit stream, the SD compressed video stream, terminal VGA compressed video stream, the HD video conference terminal of long-distance video compressed bit stream, for the HD video compressed bit stream that the HD video conference terminal is sent, the high definition original video, the SD compressed video stream, the SD original video, terminal VGA compressed video stream, the high definition playback video that the original VGA video of terminal or long-distance video compressed bit stream and high definition video collecting unit send, the SD playback video that the SD video acquisition unit sends, the digital video image that the terminal VGA playback video that computer screen capturing and coding unit sends obtains after being analyzed carries out subjective quality assessment, objective quality assessment also provides the video quality assessment unit of assessment result, wherein,
High definition video collecting unit the first output connects HD video conference terminal first input end, high definition video collecting unit the second output connects HD video conference terminal the second input, and high definition video collecting unit the 3rd output to the m+2 output connects respectively video quality assessment unit first input end to the m input; SD video acquisition unit the first output connects HD video conference terminal the 3rd input, SD video acquisition unit the second output connects HD video conference terminal four-input terminal, and SD video acquisition unit the 3rd exports the q+2 output to and connects respectively video quality assessment unit m+1 input to the m+q input; Computer screen capturing and coding unit the first output connects HD video conference terminal the 5th input, computer screen capturing and coding unit the second output connects HD video conference terminal the 6th input, and computer screen capturing and coding unit the 3rd output to the r+2 output connects video quality assessment unit m+q+1 input to the m+q+r input; Meeting IP network the first output connects HD video conference terminal the 7th input, and meeting IP network first input end connects the outside equipment output end that sends the long-distance video compressed bit stream; HD video conference terminal the first output connects video quality assessment unit m+q+r+1 input, and HD video conference terminal the second output connects video quality assessment unit m+q+r+2 input.
2. the video quality evaluation system of analyzing based on video code flow according to claim 1, it is characterized in that, described high definition video collecting unit comprises that the n road is sent to the first high-definition camera to the n high-definition camera of HD video matrix for the high definition original video by collection, for n road high definition original video is switched to the first high definition supervision/player to the m high definition supervision/player on the one hand, be sent on the other hand the HD video matrix of high definition encoder and HD video conference terminal, the HD video compressed bit stream that carries out obtaining after compressed encoding for the high definition original video that will send the HD video matrix is sent to the high definition encoder of HD video conference terminal, the m road is used for storage or playback high definition original video and the high definition playback video obtained is sent to the first high definition supervision/player to the m high definition supervision/player of described video quality assessment unit, wherein, m, n are natural number, and n > m,
The first high-definition camera output to the n high-definition camera output connects respectively HD video matrix first input end to the n input, HD video matrix the first output to the m output connects respectively the first high definition supervision/player input to the m high definition supervision/player input, HD video matrix m+1 output connects the high definition encoder input, HD video matrix m+2 output is connected to described HD video conference terminal first input end by described high definition video collecting unit the first output, the high definition encoder output is connected to described HD video conference terminal the second input by described high definition video collecting unit the second output, the first high definition supervision/player to the m high definition supervision/player output is connected to described video quality assessment unit first input end to the m input by described high definition video collecting unit the 3rd output to the m+2 output.
3. the video quality evaluation system of analyzing based on video code flow according to claim 1, it is characterized in that, described SD video acquisition unit comprises that the p road is sent to the first SD video camera to the p SD video camera of SD video matrix for the SD original video by collection, for the clear original video of p road sign is switched to the first SD supervision/player to the q SD supervision/player on the one hand, be sent on the other hand the SD video matrix of standard definition coder and HD video conference terminal, the SD compressed video stream that carries out obtaining after compressed encoding for the SD original video that will send the SD video matrix is sent to the standard definition coder of HD video conference terminal, the q road is for storage, playback SD original video also is sent to the SD playback video obtained the first SD supervision/player to the q SD supervision/player of described video quality assessment unit, wherein, p, q are natural number, and p > q,
The first SD video camera output to the p SD video camera output connects respectively SD video matrix first input end to the p input, SD video matrix the first output to the q output connects respectively the first SD supervision/player input to the q SD supervision/player input, SD video matrix q+1 output connects the standard definition coder input, SD video matrix q+2 output is connected to described HD video conference terminal the 3rd input by described SD video acquisition unit the first output, the standard definition coder output is connected to described HD video conference terminal four-input terminal by described SD video acquisition unit the second output, the first SD supervision/player to the q high definition supervision/player output is connected to described video quality assessment unit m+1 input to the m+q input by described SD video acquisition unit the 3rd output to the q+2 output.
4. the video quality evaluation system of analyzing based on video code flow according to claim 1, it is characterized in that, described terminal screen capture coding unit comprises that the r road is sent to first terminal computer to the r terminal computer of VGA video matrix for the original VGA video of the terminal by collection, for terminal original VGA video in r road being sent to the VGA video matrix of VGA encoder and described HD video conference terminal, the terminal VGA compressed video stream that carries out obtaining after compressed encoding for the original VGA video of terminal that will send the VGA video matrix is sent to the standard definition coder of HD video conference terminal, wherein, r is natural number,
First terminal fanout to the r terminal computer output connects respectively VGA video matrix first input end to the r input on the one hand, connects respectively on the other hand described video quality assessment unit m+q+1 output to the m+q+r output; VGA video matrix the first output connects VGA encoder input, VGA video matrix the second output is connected to described HD video conference terminal the 5th input by described computer screen capturing and coding unit the first output, and VGA encoder output is connected to described HD video conference terminal the 6th input by described computer screen capturing and coding unit the second output.
5. the video quality evaluation system of analyzing based on video code flow according to claim 1, it is characterized in that, described HD video conference terminal comprises HD video compressed bit stream and the high definition original video that the switching command for sending according to main control computer sends described high definition video collecting unit, SD compressed video stream and SD original video that described SD video acquisition unit sends, terminal VGA compressed video stream and terminal VGA original video that described computer screen capturing and coding unit sends, the long-distance video compressed bit stream that described meeting IP network sends switches to the multipoint control unit of described video quality assessment unit, HD video compressed bit stream for storage the transmission of the described high definition video collecting of playback unit, the SD compressed video stream that described SD video acquisition unit sends, the terminal VGA compressed video stream that described computer screen capturing and coding unit sends, the recorded broadcast of session unit of the long-distance video compressed bit stream that described meeting IP network sends, for send the main control computer of switching command to multipoint control unit, wherein,
Described high definition video collecting unit the first output is connected to the multipoint control unit first input end by described HD video conference terminal first input end; Described high definition video collecting unit the second output is connected to multipoint control unit the second input on the one hand by described HD video conference terminal the second input, is connected on the other hand recorded broadcast of session unit first input end; Described SD video acquisition unit the first output is connected to multipoint control unit the 3rd input by described HD video conference terminal the 3rd input; Described SD video acquisition unit the second output is connected to the multipoint control unit four-input terminal on the one hand by described HD video conference terminal four-input terminal, is connected on the other hand recorded broadcast of session unit the second input; Described computer screen capturing and coding unit the first output is connected to multipoint control unit the 5th input by described HD video conference terminal the 5th input; Described computer screen capturing and coding unit the second output is connected to multipoint control unit the 6th input on the one hand by described HD video conference terminal the 6th input, is connected on the other hand recorded broadcast of session unit the 3rd input; Described meeting IP network the first output passes through described HD video conference terminal the 7th input and is connected on the one hand multipoint control unit the 7th input, is connected on the other hand recorded broadcast of session unit four-input terminal; The main control computer output connects multipoint control unit the 8th input; Multipoint control unit the first output connects described video quality assessment unit m+q+r+1 input by described HD video conference terminal the first output, and multipoint control unit the second output connects described video quality assessment unit m+q+r+2 input by described HD video conference terminal the second output.
6. the video quality evaluation system of analyzing based on video code flow according to claim 1, it is characterized in that, described video quality assessment unit comprises the HD video compressed bit stream for described HD video conference terminal is sent, the SD compressed video stream, terminal VGA compressed video stream or long-distance video compressed bit stream carry out the Network Quality Analysis based on RTP packet header and TS packet header, and by the parsing HD video compressed bit stream obtained, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream are sent to Video Decoder, the subjective evaluation and test of video quality device, the video code flow analyzer of video quality objective evaluation and test device, for parsing HD video compressed bit stream, parsing SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream that the video code flow analyzer is sent, decoded, and the decoding HD video compressed bit stream obtained, decoding SD compressed video stream, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream are sent to the Video Decoder that the video quality subjectivity is evaluated and tested device and video quality objective evaluation and test device, for the parsing HD video compressed bit stream sent according to the video code flow analyzer, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream, the decoding HD video compressed bit stream that Video Decoder sends, decoding SD compressed video stream, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream, the high definition playback video that described high definition video collecting unit sends, the SD playback video that described SD video acquisition unit sends, the terminal VGA playback video that described terminal screen capture coding unit sends adopts two excitation injury tolerance stagings or single excitation continuous mass staging to carry out subjective evaluation, and the subjective evaluation result obtained is sent to the subjective evaluation and test of the video quality device of evaluates calculation machine, for the parsing HD video compressed bit stream sent according to the video code flow analyzer, resolve the SD compressed video stream, analytical Calculation machine terminal VGA compressed video stream or parsing long-distance video compressed bit stream, the decoding HD video compressed bit stream that Video Decoder sends, decoding SD compressed video stream, decoding terminal VGA compressed video stream or decoding long-distance video compressed bit stream, and the high definition original video of described HD video conference terminal transmission, the original VGA video of SD original video or terminal adopts and entirely with reference to method or without the reference method, carries out objective evaluation, and the objective evaluation result obtained is sent to the video quality objective evaluation and test device of evaluates calculation machine, for the subjective evaluation result sent according to the subjective evaluation and test of video quality device, the objective evaluation result that video quality objective evaluation and test device sends is determined the report of high clear video image objective quality, the high clear video image subjective quality comprises, the report of SD video image objective quality, the report of SD video image subjective quality, the report of terminal VGA video image objective quality, the report of terminal VGA video image subjective quality, the report of long-distance video image objective quality, the evaluates calculation machine of long-distance video image subjective quality report, wherein,
Video code flow analyzer input is connected to described HD video conference terminal first input end by described video quality assessment unit m+q+r+1 input, video code flow analyzer the first output connects the Video Decoder input, and video code flow analyzer the second output is connected to the subjective evaluation and test of video quality device first input end, video quality objective evaluation and test device first input end, the subjective evaluation and test of Video Decoder output video quality device the second input, video quality objective evaluation and test device the second input, the subjective evaluation and test of video quality device first input end to the m input is connected to described high definition video collecting unit the 3rd output to the m+2 output by described video quality assessment unit first input end to the m input respectively, the subjective evaluation and test of video quality device m+1 input to the m+q input is connected to described SD video acquisition unit the 3rd by described video quality assessment unit m+1 input to the m+q input respectively and exports the q+2 output to, the subjective evaluation and test of video quality device m+q+1 input to the m+q+r input is connected to described computer screen capturing and coding unit the 3rd output to the r+2 output by described video quality assessment unit m+q+1 input to the m+q+r input respectively, the subjective evaluation and test of video quality device output is connected to evaluates calculation machine first input end, video quality objective evaluation and test device the 3rd input is connected to described HD video conference terminal the second output by described video quality assessment unit m+q+r+2 input, and video quality objective evaluation and test device output connects evaluates calculation machine the second input.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104378630A (en) * | 2014-12-12 | 2015-02-25 | 国家电网公司 | Audio/video quality analysis system of videoconferencing television |
| CN104581140A (en) * | 2014-12-26 | 2015-04-29 | 国家电网公司 | Method for estimating video quality of videoconference |
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| CN104378630A (en) * | 2014-12-12 | 2015-02-25 | 国家电网公司 | Audio/video quality analysis system of videoconferencing television |
| CN104581140A (en) * | 2014-12-26 | 2015-04-29 | 国家电网公司 | Method for estimating video quality of videoconference |
| CN104581140B (en) * | 2014-12-26 | 2016-08-24 | 国家电网公司 | A kind of video quality evaluation method of video conferencing |
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