Patent ID: 7142692

Claim:
A reproduction equipment comprising: a coded signal input unit operable to input coded AV (“audio, video, or audio video”) signals; a decoding unit operable to decode the coded AV signals inputted from said coded signal input unit, and further operable to generate AV signals to be reproduced; an identification code generating unit operable to generate an identification code specifying the reproduction equipment; a digital watermark embedding unit operable to input the AV signals to be reproduced from said decoding unit to embed the identification code generated by said identification code generating unit as a digital watermark into said AV signals to be reproduced, wherein a digital watermark embedded signal is generated; an output unit operable to output the digital watermark embedded AV signals; and said identification code generation unit is further operable to convert the identification code into a binary bit string, each position of a specific value bit of the binary bit string indicating a corresponding signal sequence among a plurality of signal sequences, and still further operable to output the binary bit string as an output of said identification code generating unit; wherein an output of said identification code generating unit is composed of a binary bit string indicating a corresponding signal sequence among a plurality of signal sequences.