Efficient codebook search method of EVRC speech codec

Efficient codebook search method of EVRC speech codec

An efficient enhanced variable rate codec (EVRC) codebook search method based on a two-stage search is proposed. At the first stage, a coarse codevector is selected by a fast sequential search, and at the second stage, the pulse replacement procedure is run to enhance the performance of selected cod...

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Veröffentlicht in:IEEE signal processing letters 2000-01, Vol.7 (1), p.1-2
1. Verfasser: Park, Hochong
Format: Artikel
Sprache:eng
Schlagworte:
Code standards
Codec
Communication standards
Degradation
Digital communication
Equivalence
Hardware
Mobile communication
Search methods
Searching
Signal synthesis
Simulation
Speech
Speech codecs
Speech synthesis
Voice
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Beschreibung
Zusammenfassung:An efficient enhanced variable rate codec (EVRC) codebook search method based on a two-stage search is proposed. At the first stage, a coarse codevector is selected by a fast sequential search, and at the second stage, the pulse replacement procedure is run to enhance the performance of selected codevector. Simulations with various speech data show that the proposed method yields voice quality equivalent to that by the standard method with only 23% codebook search load.
ISSN:1070-9908
1558-2361
DOI:10.1109/97.809508