Patent ID: 9626977
Date: 2017-04-18
CPC Classifications: G10L

Claim:
1. A method for a machine or group of machines to watermark an audio signal, the method comprising: receiving an audio signal; receiving watermark data payload information; converting the watermark data payload information into a watermark audio signal including one or more watermark messages corresponding to the watermark data payload information, each of the one or more watermark messages comprising multiple bits, each bit represented by a respective symbol of predetermined multiple symbols, each of the multiple symbols corresponding to a respective audio segment; and inserting the one or more watermark messages into multiple spectral channels of the audio signal one symbol, of the multiple symbols, per spectral channel, of the multiple spectral channels, at a time, wherein each of the multiple spectral channels occupies a different frequency range and wherein each of the multiple symbols has a time duration that ranges from 20 milliseconds to 50 milliseconds.