DIGITAL CONTENTS REPRODUCTION DEVICE, DATA ACQUISITION SYSTEM, DIGITAL CONTENTS REPRODUCTION METHOD, METADATA MANAGEMENT METHOD, ELECTRONIC WATERMARK EMBEDDING METHOD, PROGRAM, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To allow metadata corresponding to contents to be reliably acquired even after the contents are edited by embedding metadata pointer information in such a manner that the pointer information cannot be deleted. SOLUTION: A user terminal 30 that reproduces multimedia contents comprises a pointer information detector 32 detecting metadata pointer information which is embedded in the contents and which describes information on the contents; a network interface 31 acquiring the metadata via a network based on the detected pointer information; and an index information creator 34 creating index information corresponding to the data structure of this digital contents based on the acquired metadata.