METHOD AND DEVICE FOR EMBEDDING INFORMATION AND METHOD AND DEVICE FOR TAKING OUT INFORMATION

摘要

PROBLEM TO BE SOLVED: To quickly embed watermark information in compressed picture data. SOLUTION: A variable length code decoding part 10 extracts a code word CODE and additional bits ADBIT corresponding to this code word from compressed picture data on the basis of a code table 11. An embedding processing part 16 embeds watermark information in prescribed bits of additional bits ADBIT extracted by the variable length code decoding part 10. A data connection part 17 connects additional bits, where watermark information has been embedded by the embedding processing part 16 and the code word extracted by the variable length code decoding part 10 to generate a variable length code.