CN103024431B - Video self-adaption transmission strategy based on video quality assessment - Google Patents
Video self-adaption transmission strategy based on video quality assessment Download PDFInfo
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- CN103024431B CN103024431B CN201210530061.XA CN201210530061A CN103024431B CN 103024431 B CN103024431 B CN 103024431B CN 201210530061 A CN201210530061 A CN 201210530061A CN 103024431 B CN103024431 B CN 103024431B
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Abstract
The invention relates to a video self-adaption transmission method based on video quality assessment. The video self-adaption transmission method based on video quality assessment is characterized in that speeds for a server to send video data are dynamically adjusted by assessing a quality of a video obtained by a client so that the quality of the video received by the client is effectively improved; if the quality of the video is larger than 3000, the client sends a request to the server to request the server to increase the speeds for sending the video data so that the quality of the video received by the client is improved; and if the quality of the video is smaller than or equal to 3000, the client is not interacted with the server. The video self-adaption transmission method is simple in method, flexible in implementing and high in efficiencies.
Description
Technical field
The present invention relates to network video quality field, particularly a kind of video adaptive transmission method based on video quality assessment.
Background technology
Along with the development of Internet technology, IP-based real-time streaming service more and more comes into one's own.In order to meet the requirement of client to video streaming services to greatest extent, streaming media service provider will pay attention to the quality of the Streaming Media that client reception arrives in streaming media service.For the streaming media that requirement of real-time is high, setting up a kind of simple and effective adaptive transmission method becomes a significant research topic to the quality of the Streaming Media improving client and receive.
Summary of the invention
The object of this invention is to provide a kind of video adaptive transmission method based on video quality assessment, effectively can improve the quality of the video that client receives.
The present invention adopts following scheme to realize: a kind of video adaptive transmission method based on video quality assessment, it is characterized in that: carry out by the quality evaluating the video that client obtains the speed that dynamic conditioning server sends video data, the quality of the video that client is received is improved; If the quality of video is greater than 3000, then there is request to server in client, and request server improves the speed sending video data, and the quality of the video that client is received improves; If the quality of video is less than or equal to 3000, then client and server do not do alternately.
In an embodiment of the present invention, the calculating of the quality of described video realizes according to following scheme: the length that video-frequency band SS is described as this video-frequency band is m, wherein m>8, and the quality of every frame is greater than the mean value that the quality of given threshold value 200, video-frequency band SS is the quality of every frame in this video-frequency band in this video-frequency band; If there is num (num>=0) individual SS in video, then the quality of video is the mean value of the quality of num SS.
In an embodiment of the present invention, the calculating of the quality of described frame realizes according to following scheme: the motion intense degree MA calculating each macro block (i, j) when video decode
(i, j)with mark this macro block whether be S block isflag
(i, j); If this macro block is S block, then isflag
(i, j)be 1; If this macro block is not S block, then isflag
(i, j)be 0; The quality of every frame
wherein p, q represent the macroblock number that every frame middle row comprises and arrange the macroblock number comprised.
In an embodiment of the present invention, the motion intense degree MA of described macro block (i, j)
(i, j)calculating realize according to following scheme: if macro block (i, j) needs segmentation when decoding, then the MA of this macro block is MA average of its segmentation block; If macro block (i, j) is do not need to be subdivided in decoding, then the motion intense degree of this macro block
wherein mvx
(i, j)and mvy
(i, j)represent x component and the y component of the motion vector of macro block (i, j) respectively; The calculating of the MA of each segmentation block is as the calculating of the MA of macro block.
In an embodiment of the present invention, whether described mark macro block (i, j) is that S block realizes according to following scheme:
If this bulk flag the data-bag lost at macro block (i, j) place, is then S block, i.e. isflag by step S01: whether lose according to the packet at each macro block place and judge whether this macro block is lost
(i, j)be 1; If the packet at macro block (i, j) place is not lost, then isflag
(i, j)be 0;
Step S02: according to the type of coding of each macro block, judges whether this macro block is S block; If the type of coding of macro block (i, j) is intraframe coding, then consider whether the macro block in the frame of its reference is S block; If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1; If reference macroblock is not S block, then isflag
(i, j)be 0; If the type of coding of macro block (i, j) is interframe encode, then obtain the reference macroblock of this macro block according to motion vector; If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1; If reference macroblock is not S block, then isflag
(i, j)be 0.
Useful achievement of the present invention is: the present invention proposes a kind of video adaptive transmission method based on video quality assessment, the speed that dynamic conditioning server sends video data is carried out by the quality evaluating the video that client obtains, the quality of the video that client is received is improved, the method is simple, realize flexibly, there is stronger practicality.
Accompanying drawing explanation
Fig. 1 is the flow chart of the video adaptive transmission method based on video quality assessment.
Embodiment
Please refer to Fig. 1, the present invention is based on the video adaptive transmission method of video quality assessment, carry out by the quality evaluating the video that client obtains the speed that dynamic conditioning server sends video data, the quality of the video that client is received is improved, specific as follows:
1, the motion intense degree MA of each macro block is calculated when decoding and whether mark this macro block be S block.The motion intense degree of macro block: if macro block (i, j) needs segmentation when decoding, then the MA of this macro block is the average of the MA of its segmentation block.If macro block (i, j) does not need to be subdivided when decoding, then the motion intense degree of this macro block
wherein mvx
(i, j)and mvy
(i, j)represent x component and the y component of the motion vector of macro block (i, j) respectively.The calculating of the MA of each segmentation block is as the calculating of the MA of macro block.Whether whether mark macro block is S block: 1. lose according to the packet at each macro block place and judge whether this macro block is lost, if the data-bag lost at macro block (i, j) place, is then S block, i.e. isflag by this bulk flag
(i, j)be 1.If the packet at macro block (i, j) place is not lost, then isflag
(i, j)be 0.2. according to the type of coding of each macro block, judge whether this macro block is S block.If the type of coding of macro block (i, j) is intraframe coding, then consider whether the macro block in the frame of its reference is S block.If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1.If reference macroblock is not S block, then isflag
(i, j)be 0.If the type of coding of macro block (i, j) is interframe encode, then obtain the reference macroblock of this macro block according to motion vector.If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1.If reference macroblock is not S block, then isflag
(i, j)be 0.
2, the quality of every frame is calculated: the quality of every frame
wherein p, q represent the macroblock number that every frame middle row comprises and arrange the macroblock number comprised.
3, the quality of video is calculated: the length that video-frequency band SS is described as this video-frequency band is m (m>8), and in this video-frequency band, the quality of every frame is greater than given threshold value 200.The quality of SS is the mean value of the quality of every frame in this video-frequency band; If there is num (num>=0) individual SS in video, then the quality of video is the mean value of the quality of num SS.
4, adjust according to the quality of the video obtained the speed that server end sends data: if the quality of video is greater than 3000, then there is request to server in client, request server improves the speed sending video data, and the quality of the video that client is received is improved.If the quality of video is less than or equal to 3000, then client and server do not do alternately.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (3)
1. the video adaptive transmission method based on video quality assessment, it is characterized in that: carry out by the quality evaluating the video that client obtains the speed that dynamic conditioning server sends video data, the quality of the video that client is received is improved; If the quality of video is greater than 3000, then there is request to server in client, and request server improves the speed sending video data, and the quality of the video that client is received improves; If the quality of video is less than or equal to 3000, then client and server do not do alternately;
The calculating of the quality of described video realizes according to following scheme: the length that video-frequency band SS is described as this video-frequency band is m, wherein m>8, and the quality of every frame is greater than the mean value that the quality of given threshold value 200, video-frequency band SS is the quality of every frame in this video-frequency band in this video-frequency band; If there is num SS, wherein num>=0 in video; Then the quality of video is the mean value of the quality of num SS;
The calculating of the quality of described frame realizes according to following scheme: the motion intense degree MA calculating each macro block (i, j) when video decode
(i, j)with mark this macro block whether be S block isflag
(i, j); If this macro block is S block, then isflag
(i, j)be 1; If this macro block is not S block, then isflag
(i, j)be 0; The quality of every frame
wherein p, q represent the macroblock number that every frame middle row comprises and arrange the macroblock number comprised.
2. the video adaptive transmission method based on video quality assessment according to claim 1, is characterized in that: the motion intense degree MA of described macro block (i, j)
(i, j)calculating realize according to following scheme: if macro block (i, j) needs segmentation when decoding, then the MA of this macro block is MA average of its segmentation block; If macro block (i, j) is do not need to be subdivided in decoding, then the motion intense degree of this macro block
wherein mvx
(i, j)and mvy
(i, j)represent x component and the y component of the motion vector of macro block (i, j) respectively; The calculating of the MA of each segmentation block is as the calculating of the MA of macro block.
3. the video adaptive transmission method based on video quality assessment according to claim 1, is characterized in that: whether described mark macro block (i, j) is that S block realizes according to following scheme:
If this bulk flag the data-bag lost at macro block (i, j) place, is then S block, i.e. isflag by step S01: whether lose according to the packet at each macro block place and judge whether this macro block is lost
(i, j)be 1; If the packet at macro block (i, j) place is not lost, then isflag
(i, j)be 0;
Step S02: according to the type of coding of each macro block, judges whether this macro block is S block; If the type of coding of macro block (i, j) is intraframe coding, then consider whether the macro block in the frame of its reference is S block; If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1; If reference macroblock is not S block, then isflag
(i, j)be 0; If the type of coding of macro block (i, j) is interframe encode, then obtain the reference macroblock of this macro block according to motion vector; If reference macroblock is S block, then macro block (i, j) is labeled as S block, i.e. isflag
(i, j)be 1; If reference macroblock is not S block, then isflag
(i, j)be 0.
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| CN201210530061.XA CN103024431B (en) | 2012-12-11 | 2012-12-11 | Video self-adaption transmission strategy based on video quality assessment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210530061.XA CN103024431B (en) | 2012-12-11 | 2012-12-11 | Video self-adaption transmission strategy based on video quality assessment |
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| CN103024431B true CN103024431B (en) | 2015-03-04 |
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| CN103391450B (en) * | 2013-07-12 | 2015-07-01 | 福州大学 | Spatio-temporal union reference-free video quality detecting method |
| CN104092960B (en) * | 2014-07-26 | 2017-06-06 | 福州大学 | A kind of video source switch method of view-based access control model subjective feeling |
| CN111385616B (en) * | 2018-12-28 | 2021-08-13 | 华为技术有限公司 | Method and device for determining video transmission quality |
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| US7257664B2 (en) * | 2001-12-21 | 2007-08-14 | Lambert Everest Ltd. | Adaptive error resilience for signal transmission over a network |
| CN1157059C (en) * | 2002-01-29 | 2004-07-07 | 北京工业大学 | Movement character combined video quality evaluation method |
| US8520728B2 (en) * | 2010-09-23 | 2013-08-27 | Intel Corporation | Adaptive data transmission rate control for a wireless display device |
| CN102413307B (en) * | 2011-11-30 | 2013-11-27 | 晶门科技（深圳）有限公司 | Self-adaptive code rate adjustment method and device for television video chat |
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