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In this paper, we present an information hiding method for MP3 audio files that operates directly in the compressed bitstream. The sign bits of Huffman codes are chosen as the embedding object based on the characteristic of the Huffman coding in Count1 region. The audio file size can not be changed in the embedding process. And it doesnpsilat need original audio file when secret information is extracted...
This work presents an information hiding algorithm for MP3 audio on VLC domain. The proposed algorithm obtains a Huffman table of maximal probability by analyzing the Huffman tables transcendental probability for a larger numbers of MP3 audios. The variable length codes (VLC) in the obtained Huffman table, which meet the equality of length of codeword and sign bit, are divided two opposite codespaces...
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