Method and system for line spectral frequency vector...

Details Method and system for line spectral frequency vector... Method and system for line spectral frequency vector...

2006-02-21

2006-02-21

Chawan, Vijay (Department: 2654)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S222000, C704S219000, C704S230000, C704S264000

Reexamination Certificate

active

07003454

ABSTRACT:
A method and system for quantizing LSF vectors in a speech coder, wherein predicted LSF values based on previously decoded output values are used to estimate spectral distortion, along with the residual codebook vectors and the LSF coefficients. The method comprises the steps of obtaining a plurality of quantized LSF coefficients from the respective predicted LSF values and the residual codebook vectors; rearranging the quantized LSF coefficients in the frequency domain in an orderly fashion; obtaining the spectral distortion from the rearranged quantized LSF coefficients and the respective LSF coefficients; and an optimal code vector is selected based on the spectral distortion.

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3G TS 26.090 V3.1.0 (Dec. 1999) 3rdGeneration Partnership Project (3GPP); Technical Specification Group Services and Systems Aspects; Mandatory Speech Codec speech processing functions AMR speech codec: Transcoding functions.

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