| 摘要 |
A method of improving a security measure for limited issues of audio of audio visual work includes recording multiple copes from a master data carrier, processing to impart an audio watermark to the audio portion of the signal the audio watermark being different for each recording made. Additional copy protection measures may be applied to the recording, along with use of a datafile to correlating with watermarks in order to identify the particular recording or party to whom it is to be sent. The format of the recording may be CD or DVD. |
