DATA PROCESSOR AND DATA PROCESSING METHOD, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To embed second data without increasing an amount of encoded data generated by encoding first data and to accurately decode the first and second data.

SOLUTION: An encoder 11 generates the encoded data in which the second data has been embedded by shifting the correspondence relationship between quantized code obtained by quantizing the first data and a quantization error by a manipulated variable corresponding to the second data. A decoder 12 decodes temporary encoded data by shifting the correspondence relationship between a quantized code of the buried encoded data and a quantization error by a specified manipulated variable, and decodes temporary decoded data from the temporary encoded data. It is determined whether the temporary encoded data are correct, and the first and second data are decoded based upon the judgment result. The present invention is applicable to a case where the second data are embedded without increasing the amount of encoded data generated by encoding the first data, etc.

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