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A fast-search algorithm for the predictive split VQ of LPC parameters
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- Authors
- Sangwon Kang, Changyong Son, Hosang Sung
- Issue Date
- 2001-05
- Citation
- IEEE Communications Letters, v.5, no.5, pp.212-214
- ISSN
- 1089-7798
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- In this letter, a fast-search method is introduced to reduce the searching range of a codebook using the ordering property of LSF parameters. We apply the proposed fast-search method to the G.723.1 coder with the predictive split VQ structure. Simulation results indicate that using this fast-search method, the average searching range of the codebook can be reduced by 20.1% without degradation of spectral distortion (SD) and additional increases of memories. The reduction of 20.1% in the average searching range results in the decrease of 19.1%, 20.1%, 19.4%, and 12.2% in the number of additions, subtractions, multiplies, and comparisons, respectively.
- KSP Keywords
- Ordering property, Search Algorithm(GSA), Spectral distortion, search method, simulation results