INFORMATION TRANSMISSION APPARATUS, ACOUSTIC COMMUNICATION SYSTEM, AND ACOUSTIC WATERMARK SUPERIMPOSING METHOD

摘要

To provide an acoustic watermark superimposing method which allows copyright information to be added to an acoustic signal produced by musical performance.SOLUTION: Copyright information such as a player information, a place of a space where a musical instrument is played, date, and so on is encoded into an acoustic signal in a non-audible frequency band to generate an information sound. This information sound is successively or intermittently emitted in a space where a musical instrument is played, thereby the copyright information being simultaneously recorded as a sound watermark when a performance sound of a musical instrument is recorded.SELECTED DRAWING: Figure 5