| Paper: | SP-P1.2 | ||
| Session: | Speech Coding for Networks / Single-Channel Speech Enhancement | ||
| Time: | Tuesday, May 18, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Speech Processing: Narrowband Speech Coding | ||
| Title: | IMPROVEMENT ISSUES ON TRANSCODING ALGORITHMS: FOR THE FLEXIBLE USAGE TO THE VARIOUS PAIRS OF SPEECH CODEC | ||
| Authors: | Jin-Kyu Choi; Yonsei University | ||
| Chang-Heon Lee; Yonsei University | |||
| Hong-Goo Kang; Yonsei University | |||
| Young-Cheol Park; Yonsei University | |||
| Dae Hee Youn; Yonsei University | |||
| Abstract: | This paper describes important issues on transcoding between different speech codecs by considering the paradigms of source and target coders. Conventional transcoding algorithms on LSP, pitch and adaptive/fixed codebook conversion are refined with regard to the structure of coders. In addition, a new perceptual weighting filter that plays a role in post-filter and perceptual weighting filter together is proposed to further improve the performance. The performance of the proposed algorithms is verified in step-by-step manner with the examples of transcoding between AMR, G.723.1 and G.729. By employing the proposed algorithm to the transcoders, the complexity is reduced by about 20%~76.88% and quality is also improved compared to conventional approaches. | ||
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