Video error-resistance coding and encoding method based on embedded distributed video coding descriptions
A kind of technology of distributed video, coding and decoding method
Inactive Publication Date: 2012-04-25
SHANGHAI JIAOTONG UNIV
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But these schemes do not give how to estimate the transmission distortion at the decoding end and the joint optimization problem of distributed video coding and traditional video coding at the encoding end
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[0024] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0025] Such as figure 1 As shown, the encoding process of this embodiment includes the following steps:
[0026] Step 1: Divide the frame to be encoded into several macroblocks (Macroblocks), and use the motion estimation and motion compensation method in the H.264 / AVC encoding scheme to calculate the motion vector, and send the result to the mode selection module to calculate the encoding cost corresponding to different modes ;
[0027] Step 2, for different modes, estimate the code rate required for protection of this mode by distributed video coding and estimate the distortion of the decoded video sequence aft...
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The invention relates to a video error-resistance coding and encoding method based on embedded distributed video coding descriptions, belonging to the technical field of coding and encoding. The method comprises the following steps: carrying out hybrid predictive video coding at a coding terminal to obtain distributed video coding code stream; carrying out distributed video coding protection processing on interframe encoding frames in the video coding code stream and then transmitting the interframe encoding frames to a decoding terminal; discarding the distributed video coding stream corresponding to the interframe encoding frames when no transmission errors exist in the interframe encoding frames and reference frames are not affected by transmission distortion; or else, encoding the received distributed video coding stream and taking the encoded results as the references for follow-up frames to eliminate transmission of transmission distortion with the passage of time and realize video error-resistance. In the invention, the combined optimization of the distributed video coding and the traditional coding can improve overall performance of the system, so that the method is suitable for video transmission with no feedback channels or longer time delay of feedback channel transmission.
Description
technical field [0001] The present invention relates to a method in the technical field of video coding and decoding, in particular to a video error-resistant coding and decoding method based on embedded distributed video coding description. Background technique [0002] Video codec technology is crucial for applications such as video storage and transmission. Existing hybrid video coding technologies (such as H.264 / AVC, MPEG-x series standards) use time-spatial predictive coding to improve coding efficiency at the coding end, but the generated code stream is very sensitive to transmission errors. In order to improve the error resistance of the coded stream, people usually use methods such as channel coding to improve the reliability of the coded stream transmission link, or use video signal interframe and frame Correlation within the prediction, in order to minimize the deterioration of the quality of the decoded image caused by transmission errors. However, these two typ...
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IPC IPC(8): H04N7/64H04N7/26H04N7/50H04N19/89H04N19/103H04N19/147H04N19/44H04N19/895
Inventor 熊红凯张永生
Owner SHANGHAI JIAOTONG UNIV