Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Transcoding Algorithm for SMV and G.723.1 Vocoders via Direct Parameter Transformation

SMV와 G.723.1 음성부호화기를 위한 파라미터 직접 변환 방식의 상호부호화 알고리듬

  • 서성호 (한국과학기술원 전자전산학과) ;
  • 장달원 (한국과학기술원 전자전산학과) ;
  • 이선일 (한국과학기술원 전자전산학과) ;
  • 유창동 (한국과학기술원 전자전산학과)
  • Published : 2003.07.01
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Abstract

In this paper, a transcoding algorithm for the Selectable Mode Vocoder (SMV) and the G.723.1 speech coder via direct parameter transformation is proposed. In contrast to the conventional tandem transcoding algorithm, the proposed algorithm converts the parameters of one coder to the Other Without going through the decoding md encoding process. The proposed algorithm is composed of four parts: the parameter decoding, line spectral pair (LSP) conversion, pitch period conversion, excitation conversion and rate selection. The evaluation results show that the proposed algorithm achieves equivalent speech quality to that of tandem transcoding with reduced computational complexity and delay.

Keywords