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Transcoding Algorithm for SMV and G.729A Vocoders via Direct Parameter Transformation  

장달원 (한국과학기술원 전자전산학과)
서성호 (한국과학기술원 전자전산학과)
이선일 (한국과학기술원 전자전산학과)
유창동 (한국과학기술원 전자전산학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.40, no.6, 2003 , pp. 71-83 More about this Journal
Abstract
In this paper, a novel transcoding algorithm for the G.729A and the Selectable Mode Vocoder(SMV) vocoders 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 and encoding processes. In transcoder from SMV to G.729A, LSP conversion algorithm, pitch delay conversion algorithm and transcoding algorithm in lower rate are proposed, and in transcoder from G.729A to SMV, LSP conversion algorithm, pitch delay conversion algorithm and rate selection algorithm are proposed. Evaluation results show that while exhibiting better computational and delay characteristics, the proposed algorithm produces equivalent or Improved speech quality to that produced by the tandem transcoding algorithm.
Keywords
transcoding; G.729A; SMV; transcoding; direct parameter transformation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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