Audio processing with time advanced inserted payload signal

Details Audio processing with time advanced inserted payload signal Audio processing with time advanced inserted payload signal

2006-09-29

2011-10-18

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

With mixer

C381S077000, C700S094000

Reexamination Certificate

active

08041058

ABSTRACT:
Audio processing apparatus in which a payload signal is inserted into a primary audio signal comprises a noise generator operable to generate a noise signal in dependence on the payload signal; a level detector for detecting a signal level of the primary signal; a modulator for respectively increasing or decreasing the level of the noise signal in response to an increase or a decrease of the detected signal level of the primary audio signal, to generate a modulated noise signal; a combiner for combining the primary signal and the modulated noise signal; and a signal delay arrangement; the modulator operating with respect to the signal delay arrangement so that a decrease in the level of the noise signal is time-advanced with respect to the corresponding decrease in the signal level of the primary audio signal.

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