Bit error concealment methods for speech coding

Details Bit error concealment methods for speech coding Bit error concealment methods for speech coding

2002-08-19

2008-07-29

Hudspeth, David R. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S225000, C704S226000

Reexamination Certificate

active

07406411

ABSTRACT:
A system and method of concealing bit errors in a signal are provided. An exemplary method detects bit errors in an input signal having at least a current signal segment and a previous signal segment. The previous signal segment has a log-gain value qlg(m−1) and immediately precedes the current signal segment. The method comprises estimating a level lvl(m−1) of the input signal and determining a log-gain value qlg(m) of the current signal segment within the input signal. The method also comprises determining a difference between the gain value of the current signal segment and the previous signal segment and determining whether the difference exceeds a threshold. wherein the threshold is adaptive to the input signal level.

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