H.264/AVC video bitstream oriented large volume data hiding method
A data hiding and large-capacity technology, applied in digital video signal modification, electrical components, image communication, etc., can solve the problems of very sensitive to small changes, limited data capacity, and not fully exploiting the characteristics of residual coefficient codewords, etc.
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[0046] The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.
[0047] The invention proposes a large-capacity data hiding method for H.264 / AVC video code stream, which includes two parts: secret information embedding and secret information extraction.
[0048] Among them, the overall implementation block diagram of the embedded part of the secret information is as follows figure 1 As shown, the specific process of the hidden information embedding part is as follows:
[0049] ①-1. Each two Level codewords whose suffix length is 1 in the H.264 / AVC video compression coding standard and satisfy the following combination conditions are formed into two codeword pairs, wherein the combination conditions are the codes of the two Level codewords The word length differs by 1 and the difference between the absolute values of the Level values of the two Level codewords is 1. In the two codeword pairs composed of ...
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