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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasaya Yamamoto, Tomoyuki Nonomura, Masataka Minami, Masayuki Kozuka
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A data processing apparatus is provided with a data obtaining unit which receives a network signal sn on a network N and obtains distributed audio data Dau in which copyright information or the like is embedded, and a control unit which obtains information indicating a watermarking method which has been used when embedding the copyright information or the like in the audio data. The embedded information is extracted by an appropriate watermarking method according to the obtained information indicating the used watermarking method. The extracted information is again embedded in the distributed audio data Dau by using a predetermined watermarking method, and thus obtained audio data is recorded on a recording medium. Therefore, regardless of the watermarking method used for embedding the copyright information or the like in the distributed audio data Dau, the distributed audio data Dau can be appropriately reproduced by reproduction apparatuses as domestic electrical equipment, according to the embedded information.
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 recording medium in which information-embedded digital data is recorded, said information-embedded digital data being obtained by embedding relevant information in supply digital data to be supplied from the distribution end to the user, wherein:
A data recording medium in which information-embedded digital data and used method information are recorded, said information-embedded digital data being obtained by embedding relevant information in supply digital data to be supplied from the distribution end to the user, and said used method information indicating the watermarking method used for embedding the relevant information in the supply digital data, and following the information-embedded digital data, wherein:
Dependencies are inferred from the claim text.