Encoding a Hidden Digital Signature onto an Audio Signal Using Psychoacoustic Masking
John F. Tilki · 1998
We report on the development of a system for use in an interactive television application. A method of encoding a hidden digital signature onto the audio component of a television signal is presented. This digital signature is about 35 bits in length and is encoded utilizing psychoacoustic principles such that it is nearly inaudible to human observers yet detectable by an inexpensive hand-held decoder. The encoding scheme is robust against most extraneous room noise as well as the wow and flutter of video tape machines.