Adaptive distortion manager for use with an acoustic echo canceler and a method of operation thereof
First Claim
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1. A distortion manager for use with an acoustic echo canceler, comprising:
- a coherence ascertainer configured to determine a coherency between audio streams; and
an adaptive distortion adder coupled to said coherence ascertainer configured to selectively add non-linear distortion to at least one of said audio streams based on said coherency.
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Abstract
A distortion manager and a method of managing distortion for use with an acoustic echo canceler. In one embodiment, the distortion manager includes a coherence ascertainer coupled to an adaptive distortion adder. The coherence ascertainer determines a coherency between audio streams and the adaptive distortion adder selectively adds non-linear distortion to at least one of the audio streams based on the coherency.
33 Citations
20 Claims
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1. A distortion manager for use with an acoustic echo canceler, comprising:
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a coherence ascertainer configured to determine a coherency between audio streams; and
an adaptive distortion adder coupled to said coherence ascertainer configured to selectively add non-linear distortion to at least one of said audio streams based on said coherency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of managing distortion associated with an acoustic echo canceler, comprising:
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determining a coherence between audio streams; and
adding non-linear distortion selectively to at least one of said audio streams based on said coherence. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An acoustic echo canceler for a stereophonic teleconferencing system, comprising:
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an echo estimator that produces a total echo estimate of individual echo paths in an receiving location by filtering audio streams from a transmitting location based on estimated impulse responses of said receiving location;
an echo error determiner that generates a signal representing the difference between said total echo estimate and a signal at said receiving location representing at least acoustic echo signals; and
a distortion manager, including;
a coherence ascertainer that determines a coherency between said audio streams; and
an adaptive distortion adder coupled to said coherence ascertainer that selectively adds non-linear distortion to at least one of said audio streams based on said coherency. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification