Title: Audio processing
Application Number: 200610143655 Application Date: 2006.10.27
Publication Number: 1975859 Publication Date: 2007.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10L19/00;G01R29/26;H03K3/84;G06K9/00;H04N5/913
Applicant(s) Name: Sony UK Ltd. Address:
Inventor(s) Name: Kentish William Edmund;Haynes Nicolas John
Attorney & Agent: wangyong
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.
Time: 8