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High speed multi-stage code search algorithm in CELP

Elshafei, M. and Al-Suwaiyel, M.I. (1991) High speed multi-stage code search algorithm in CELP. Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services, 1.

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Abstract

An efficient multistage algorithm for code search in the code excited linear prediction (CELP) methods of speech coding is described. The algorithm requires binary clustering of the codebook into a fixed number of cells and inverse filtering of the incoming speech by the format and pitch filters to produce a residual error sequence (RES). It is demonstrated that the method could achieve a reduction in the number of operations from 40 to 50 times. It is shown that codebooks constructed from random walk stochastic sequences improve the average signal to noise ratio by 5-6 dB over codebooks constructed from Gaussian white noise sequences



Item Type:Article
Date:December 1991
Date Type:Publication
Subjects:Computer
Divisions:College Of Computer Sciences and Engineering > Information and Computer Science Dept
Creators:Elshafei, M. and Al-Suwaiyel, M.I.
ID Code:14449
Deposited By:KFUPM ePrints Admin
Deposited On:24 Jun 2008 16:36
Last Modified:12 Apr 2011 13:15

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