8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


A Novel Transcoding Algorithm for SMV and G.723.1 Speech Coders via Direct Parameter Transformation

Seongho Seo, Dalwon Jang, Sunil Lee, Chang D. Yoo

KAIST, Korea

In this paper, a novel transcoding algorithm for the Selectable Mode Vocoder (SMV) and the G.723.1 speech coder 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 process. The proposed algorithm is composed of four parts: the parameter decoding, Line Spectral Pair (LSP) conversion, pitch period 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.

Full Paper

Bibliographic reference.  Seo, Seongho / Jang, Dalwon / Lee, Sunil / Yoo, Chang D. (2003): "A novel transcoding algorithm for SMV and g.723.1 speech coders via direct parameter transformation", In EUROSPEECH-2003, 2861-2864.