| 摘要 |
An apparatus and a method for inserting and detecting watermark are provided to facilitate the insertion and detection of watermark information, and prevent the distortion of an original signal and an inserted watermark. An encoding unit(210) classifies a plurality of Huffman codebooks into a plurality of groups, and selects one group among the plurality of groups according to water mark information to be inserted. The encoding unit selects a Huffman codebook, which is to be used for Huffman-coding among the selected group, and encodes and transmits the selected Huffman codebook. A decoding unit(230) performs Huffman decoding of the transmitted signal using the Huffman codebook transmitted from the encoding unit, and simultaneously extracts watermark information based on the group including the Huffman codebook.
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