Browse > Article

Design of EVRC LSP Codebooks with Korean  

이진걸 (배재대학교 정보통신공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.2, 2002 , pp. 167-172 More about this Journal
Abstract
The EVRC (Enhanced Variable Rate Codec) is currently in service as a speech cosec in digital cellular systems in North America and Korea. In the EVRC, the LSP (Line Spectral Pairs) related to energy distribution of speech signals in the frequency domain are coded by weighted split vector quantization. Considering that the LSP codebooks might be trained with the language of the develop country of the codebooks or English, it is expected that codebooks trained with Korean provide the performance improvements in the communication in Korean. In this paper, the EVRC LSP codebooks are designed with korean adopting the LBG algorithm based vector quantization, and the performance improvement of the vector quantization and the accompanying speech quality improvement are demonstrated by spectral distortion, SNR and SegSNR measurements, respectively.
Keywords
EVRC; UP; Spectral Distortion;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Enhanced Variable Rate Codec, Speech Service Option 3 for Wideband Spread Spectrum Digital Systems /
[] / TIA/EIA/IS-127
2 The RCELP Speech-Coding Algorithm /
[ W. B. Kleijn;P. Kroon;D. Nahumi ] / European Transactions on Telecommunications   DOI
3 /
[ Deller, John R.;Hansen, John H. L.;Proakis, John G. ] / Discrete-Time Processing of Speech Signals
4 Efficient Vector Quantization of LPC Parameters at 24 Bits/Frame /
[ Kuldip K. Paliwal;Bishnu S. Atal ] / IEEE Transactions on Speech and Audio Processing   DOI   ScienceOn
5 An Improved 8 kb/s RCELP Coder /
[ D. Nahumi;W. B. Kleijn ] / IEEE Workshop on Speech Coding
6 An Algorithm for Vector Quantizer Design /
[ Yoseph Linde;Andres Buzo;Robert M. Gray ] / IEEE Transactions on Communications
7 /
[ Allen Gersho;Robert M. Gray ] / Vector Quantization and Signal Compression