CONTENTS DISTRIBUTION SYSTEM AND CONTENTS DISTRIBUTION METHOD USED FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a contents distribution system that can easily trace to what extent contents are reproduced without the need for measuring a reproduction time of the contents. SOLUTION: A digital watermark inserting device 2 inserts digital watermark data 3 denoting information different for each scene and chapter of an original image 1 to the original image 1 in the case of inserting digital watermark data to a stream when the stream is generated, and an MPEG (moving picture experts group) encoder 4 compresses the data to which the digital watermark data 3 are inserted in compliance with the MPEG to generate an MPEG stream 5.