ELECTRONIC WATERMARK RECORDING METHOD AND ELECTRONIC WATERMARK RECORDER

摘要

PROBLEM TO BE SOLVED: To obtain an electronic watermark recording method and recorder where no electronic watermark signal is always lost in the case of extracting part of contents information and recording the extracted part. SOLUTION: An electronic watermark signal detector 1 detects an electronic watermark signal (1st electronic watermark signal) from received contents information. An electronic watermark contents memory 2 temporarily stores the detected electronic watermark signal. The temporarily stored electronic watermark signal is given to an electronic watermark signal insertion device 4. The electronic watermark signal insertion device 4 newly records an electronic watermark signal (2nd electronic watermark signal) whose contents are similar to those of the detected electronic watermark signal (1st electronic watermark signal) to the contents signal extracted by a contents signal extraction device 3.