Authentic data embedding algorithm aiming at network video

Authentic data embedding algorithm aiming at network video

  • CN 1,882,081 A
  • Filed: 05/11/2006
  • Published: 12/20/2006
  • Est. Priority Date: 05/11/2006
  • Status: Active Application
First Claim
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1. Step 1, video code flow carry out partial decoding of h, and concrete steps are as follows:

  • Step 1.1, read the header of code stream, the record corresponding information, and judge whether the frame of video of current code stream correspondence is the I frame, if the I frame, then execution in step 1.2, otherwise this code stream is not dealt with, and directly return;

    Step 1.2, storage allocation space are in order to the statistical information of the decoded DCT coefficient of storage part and each regional chromatic value;

    Step 1.3, be unit with the macro block, carry out partial decoding of h, concrete steps are as follows;

    Step 1.3.1, carry out variable length decoding (Variable Length Decoding, VLD), the DCT coefficient after obtaining quantizing;

    Step 1.3.2, the DCT coefficient after will quantizing carry out re-quantization, and (Inverse Quantization IQ), rebuilds the DCT coefficient;

    Step 1.3.3, the DC component (Direct Current, DC coefficient) of two chrominance block in this macro block is added in the chromatic value statistics of image-region of this macro block correspondence;

    Step 11.3.4, judge whether to be last macro block, if not then to next macro block execution in step 1.3.1, otherwise execution in step 2;

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