Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Reexamination Certificate
2005-07-05
2005-07-05
Mei, Xu (Department: 2644)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
C381S120000, C455S296000
Reexamination Certificate
active
06914987
ABSTRACT:
Audio signals are reproduced with consistent perception of total harmonic distortion even with varying spectral content of a particular audio signal without separately limiting different frequency bands within the audio signal. A distortion threshold representative of an amount of distortion to be allowed to be introduced by a power amplifier is determined in response to a frequency content of the audio signal. A distortion trigger compares a measured average distortion signal and the distortion threshold and reduces the controllable gain of the amplifier if the average distortion signal exceeds the distortion threshold.
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ST® Multifunction Quad Power Amplifier with Built-In Diagnostics Features, Model TDA7562, Nov., 2001.
Blind Henry Francis
Whitecar John Elliott
MacMillan Sobanski & Todd LLC
Mei Xu
Visteon Global Technologies Inc.
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