DIGITAL DATA LITERARY WORK PROCESSING METHOD, DIGITAL DATA LITERARY WORK PROCESSOR, AND RECORDING MEDIUM HAVING RECORDED DIGITAL DATA LITERARY WORK PROCESSING PROGRAM THEREON

摘要

PROBLEM TO BE SOLVED: To provide a digital data literary work processor capable of embedding decodable security data in MIDI data even when a format conversion is performed in the MIDI data. SOLUTION: This processor is a digital data literary work processor 20 provided with a digital data literary work storage means 1, a channel data extracting means 2 detecting channel data from the means 1, a channel separating means 3 grouping the selected channel data every channel, a security data storage part 5, a bit string generating means 6 generating the bit string of security data from the means 5, a bit embedding means 4 embedding one bit value of bit values constituting the bit string of the security data in the channel data having the same time series number among data constituting respective channels according to an embedding argorithm with respect to respective digital data for every channel which are to be outputted from the means 3 and an embedded data outputting means 7 outputting a digital data string in which prescribed security data are embedded in a prescribed format.