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Video transmission error control method and system

A technology of error control and video transmission, applied in the direction of digital video signal modification, TV, electrical components, etc., can solve the problems of unobtainable video decoding quality, blurred picture, poor visual effect, etc., to improve video decoding effect and optimize decoding quality Effect

Active Publication Date: 2010-12-29
NANJING ZHONGXING XIN SOFTWARE CO LTD
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Problems solved by technology

However, the above algorithms have certain limitations. The bilinear interpolation algorithm always treats the damaged video macroblock as a smooth image. If the damaged video macroblock has rich high-frequency information, or the image boundary crosses the missing macro When the image is blocked, the interpolation result of the algorithm will cause the texture of the image to be lost, the picture will become blurred, and the picture quality will not be significantly improved, and may even cause a decline; the direction interpolation algorithm predicts the damaged area by detecting the edge information around the damaged area The direction of the inner edge and the direction interpolation along this direction, but when the edges around the damaged area are chaotic, it may also cause false edges, resulting in poor visual effects
To sum up, the existing spatial interpolation algorithm still has defects and cannot obtain ideal video decoding quality

Method used

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  • Video transmission error control method and system
  • Video transmission error control method and system

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Embodiment Construction

[0041] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0042] The invention mainly improves the decoding quality of the image through the method of concealing code errors in the space when the data is lost in the video transmission process. In the process of bit error concealment, an effective adaptive algorithm selection mechanism is provided, which can not only recover image information more clearly, but also avoid the generation of false edges to a certain extent. The key lies in the quantitative analysis of the edge concentration degree of the lost video information, so that an appropriate algorithm can be adaptively selected. Among them, the quantitative analysis of the edge concentration degree of the lost video information is to use the information entropy theory to complete the judgment of the target through the design of the direction information entropy. In error concealmen...

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Abstract

The invention discloses a video transmission error control method and a video transmission error control system. The method comprises the error code masking process which comprises the steps of: performing edge intensity quantitative analysis on damaged macroblocks so as to divide the damaged macroblocks into smooth blocks or edge blocks; for the smooth blocks, performing error code masking by adopting a bilinear difference algorithm; and for the edge blocks, performing error code masking by adopting a directional interpolation algorithm. The method and the system optimize video transmission image decoding quality and improve video decoding effect.

Description

technical field [0001] The invention relates to video transmission error control technology, in particular to a video transmission error control method and system. Background technique [0002] With the rapid development of multimedia, network technology and mobile communication technology, large-capacity transmission applications such as mobile terminals, such as mobile phone video transmission, have become an inevitable trend. However, in the wireless mobile network channel, the occurrence of bit errors and data loss are always unavoidable. Moreover, the compressed video data is very sensitive to symbol errors, and errors in a small amount of symbols may cause a large number of symbols to be unable to be decoded correctly. In turn, the quality of the image reconstructed by the mobile phone terminal is severely degraded, and even the image cannot be reconstructed. Therefore, error control for bit errors has become an important technology in mobile phone video communicatio...

Claims

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Application Information

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IPC IPC(8): H04N7/68H04N7/26H04N19/895
Inventor 程超
Owner NANJING ZHONGXING XIN SOFTWARE CO LTD
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