US 7,610,197 B2Granted

Method and apparatus for comfort noise generation in speech communication systems

AssigneeMotorola, Inc.

InventorsEdgardo M. Cruz-Zeno, James P. Ashley

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Abstract

A method that may be used in variety of electronic devices for generating comfort noise includes receiving a plurality of information frames indicative of speech plus background noise, estimating one or more background noise characteristics based on the plurality of information frames, and generating a comfort noise signal based on the one or more background noise characteristics. The method may further include generating a speech signal from the plurality of information frames, and generating an output signal by switching between the comfort noise signal and the speech signal based on a voice activity detection.

Claims12

Dependent claims

An apparatus for comfort noise generation in a speech communication system, comprising a decoder configured to receive a plurality of information frames indicative of speech plus background noise;

estimate one or more background noise characteristics based on the plurality of information frames wherein
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and wherein:
Ebgn(m,i) is an estimated background noise energy value of an ith frequency channel of an mth frame of the plurality of information frames,
Ech(m,i) is a estimated channel energy value of the ith frequency channel of the mth frame of the plurality of information frames,
Ebgn(m−1,i) is an estimated background noise energy value of the ith frequency channel of the (m-1)th frame of the plurality of frequency frames,
Δ1 is a first incremental energy value,
Δ2 is a second incremental energy value, and
Evoice.is an energy value indicative of voice energy;
and generate a comfort noise signal based on the one or more background noise characteristics.

97 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/216,624Filed 31 Aug 2005
Published: US 2007/0050189 A11 Mar 2007
Granted: 27 Oct 2009
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

G10L 19/012
Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals,…:…
G10L 19/005
Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals,…:…
G10L
Speech analysis techniques or speech synthesis

Family

US 2007/0050189 A1Pre-grant publication · published 1 Mar 2007
US 7,610,197 B2This patent

From the US filing history. Foreign family members aren’t listed.

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