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Information reproducing and recording apparatus and method which permits copying for personal use while protecting a copyright
Information reproducing and recording apparatus and method which permits copying for personal use while protecting a copyright
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机译:允许在保护版权的同时复制供个人使用的信息再现和记录设备和方法
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摘要
The following operations are performed according to instructions from a CPU. The ID information of music information having a copyright that is recorded on a reproduction-side recording medium is detected by a first inherent information detection circuit. The ID information indicating the kind of a recording-side recording medium is detected by a second inherent information detection circuit. Based on information retrieved from a history memory, a judgment circuit judges whether the music information has already been copied to and recorded onto a recording medium of the same kind as the recording-side recording medium. If a judgment result is affirmative, the CPU prohibits the operation of copying and recording the music information recorded on the reproduction-side recording medium onto the recording-side recording medium. If the judgment is negative, the operation of copying and recording the music information recorded on the reproduction-side recording medium onto the recording-side recording medium is performed with the CPU's judgment that this operation is intended for personal use of the music information having a copyright. A digital watermark generated by a digital watermark encoder and a collation code are recorded separately on the recording-side recording medium, whereby analog recording is also prohibited. Alteration of the data of the recording-side recording medium can be detected by comparing a collation code obtained from the digital watermark and the collation code recorded separately from the digital watermark. The music information having a copyright can thus be protected accurately.
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