Encoding a hidden auxiliary channel onto a digital audio signal using psychoacoustic masking

摘要: We report on the development of a method encoding an auxiliary channel onto digital audio signal such that it is imperceptible to human observers. The accomplished by imposing slight and controlled changes phase spectrum short-time windows. By employing principles psychoacoustics masked from perception. Furthermore, decoding are achieved via fast algorithms which allow real time processing. applicable for any digitized containing voice, music, or other acoustic signals be heard humans. Possible sources include compact discs, television, radio, telephony, source where in format.