| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform watermark imparting processing so that an original audio signal is completely restored when a digital audio signal in which an audible watermark is embedded is reproduced while the audible watermark is removed. <P>SOLUTION: A signal processor which processes a spectrum encoded audio signal including band data components representing contribution of sounds in respective frequency bands changes a subset of one or more band data component to generate a band-changed digital audio signal having changed band data components, and generates restored data for restructuring original values of the changed band data components. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
