Patent ID: 6529506
Filing Date: 2003-03-04
Classification: G11B

Abstract:
A data processing apparatus for receiving various kinds of information-embedded digital data which correspond to different watermarking methods and have been obtained by embedding relevant information in supply digital data to be supplied from the distribution end to the user, and processing these information-embedded digital data, said apparatus comprising:a data obtaining unit for obtaining a desired information-embedded digital data as input digital data; a method information obtaining unit for obtaining used method information which corresponds to the input digital data and indicates the watermarking method used for the process of embedding the relevant information; an information extraction unit for extracting the relevant information from the input digital data by using the used watermarking method, in accordance with the used method information which has been obtained; and an information embedding unit for embedding the extracted relevant information or processed information obtained by processing the relevant information, in the input digital data or in processed digital data obtained by subjecting the input digital data to a predetermined data processing, by using a predetermined watermarking method.