SPEECH CODING WITH COMFORT NOISE VARIABILITY FEATURE FOR INCREASED FIDELITY

Title:

SPEECH CODING WITH COMFORT NOISE VARIABILITY FEATURE FOR INCREASED FIDELITY

Document Type and Number:

WIPO Patent Application WO2000031719

Kind Code:

A3

Abstract:

The quality of comfort noise generated by a speech decoder (93) during non-speech periods is improved by modifying (30, 75) comfort noise parameter values (33) normally used to generate the comfort noise. The comfort noise parameter values are modified in response to variability information (43) associated with a background noise parameter. The modified comfort noise parameter values (35) are then used to generate the comfort noise.

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Inventors:

EKUDDEN ERIK
HAGEN ROAR
JOHANSSON INGEMAR

Application Number:

PCT/SE1999/002023

Publication Date:

March 20, 2003

Filing Date:

November 08, 1999

Export Citation:

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Assignee:

ERICSSON TELEFON AB L M (SE)

International Classes:

G10L19/012; G10L19/00; G10L19/04; H04B14/04; H04M1/00; H04M1/725; (IPC1-7): G10L19/00

Domestic Patent References:

WO1998048524A1

1998-10-29

Foreign References:

EP0843301A2	1998-05-20
US5657422A	1997-08-12
US5630016A	1997-05-13

Other References:

XP002901105
XP002901106

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