| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To embed or extract additional information in or from a signal of audio, an image, etc., to have sufficient durability to existent playback terminal equipment while maintaining playback compatibility with content files of music, video, etc., and giving playback compatibility of files with playback terminal device for video etc. <P>SOLUTION: A signal processor for audio, image, etc., has an additional information embedding means 30 of embedding binary additional information in an input signal and outputting the signal by finding power values of a signal in a predetermined first section and a signal in a second section in the input signal continuously changing, and performing setting control over the power value of the signal in the second section so that the difference value between both the power values is an odd multiple or even multiple of the value obtained by dividing the power value in the first section by L. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
