Improvement issues on transcoding algorithms: For the flexible usage to the various pairs of speech codec

Jin Kyu Choi, Chang Heon Lee, Hong Goo Kang, Young Cheol Park, Dae Hee Youn

Research output: Contribution to journalConference article

6 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)I269-I272
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume1
Publication statusPublished - 2004 Sep 28
EventProceedings - IEEE International Conference on Acoustics, Speech, and Signal Processing - Montreal, Que, Canada
Duration: 2004 May 172004 May 21

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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