Proceedings Article10.1109/ICASSP.2004.1325974
Improvement issues on transcoding algorithms: for the flexible usage to the various pairs of speech codec
Jin Kyu Choi,Chang-Heon Lee,K. Hong-Goo,Young-Cheol Park,Dae-Hee Youn +4 more
- 17 May 2004
- Vol. 1, pp 269-272
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TL;DR: Conventional transcoding algorithms on LSP, pitch and adaptive/fixed codebook conversion are refined with regard to the structure of the coders and a new perceptual weighting filter is proposed to improve the performance.
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Abstract: The 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 the coders. In addition, a new perceptual weighting filter, that plays a role in the post-filter and perceptual weighting filter together, is proposed to improve the performance further. The performance of the proposed algorithms is verified in a step-by-step manner with examples of transcoding between AMR, G.723.1 and G.729. By applying 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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Citations
Patent
Method and device for carrying out optimal coding between two long-term prediction models
Mohamed Ghenania,Claude Lamblin +1 more
- 09 Jan 2006
TL;DR: In this paper, a method for coding according to a second coding format from items of information obtained by using a coding based on a first coding format was proposed, where the first and second coding formats use, particularly for coding a speech signal, a search for long-term prediction parameters LTP by searching a dictionary containing candidate parameters.
5
Smart Transcoding between CELP Speech Codecs through Voiced Oriented Pitch Mapping
C. Beaugeant
- 01 Oct 2007
TL;DR: This paper presents an alternative solution to the already published ones by applying a pitch mapping driven by the voiced property of the frames of analysis to reduce complexity and impact on the quality of the processed speech signal.
3
An efficient transcoding algorithm between AMR-NB and G.729ab
TL;DR: By employing the proposed algorithm in transcoders, complexity is reduced by about 26-82% and quality is also improved compared to the conventional DTE method.
2
•Proceedings Article
Quality and computation load reduction achieved by applying smart transcoding between CELP speech codecs
Christophe Beaugeant,Herve Marcel Taddei +1 more
- 01 Sep 2007
TL;DR: This paper elaborates on some alternative transcoding methods reducing complexity and delay and presents for each of them an evaluation of quality in relation with complexity reduction, and highlights the interest of smart transcoding in terms of quality, complexity anddelay reduction.
1
Patent
Method and device optimizes coding between two models of prediction long term
Mohamed Ghenania,Claude Lamblin +1 more
- 11 Jan 2005
TL;DR: A coding method according to a second format, based on information obtained by the implementation of a coding in a first format, for searching for long-term prediction parameters LTP by exploring a dictionary containing candidates settings.
References
Description of ITU-T Recommendation G.729 Annex A: reduced complexity 8 kbit/s CS-ACELP codec
R. Salami,Claude Laflamme,B. Bessette,J.-P. Adoul +3 more
- 21 Apr 1997
TL;DR: Several algorithmic changes have been introduced into G.729 which resulted in 50% drop in its complexity, enabling a DSP implementation with a complexity of about 10-12 MIPS, while meeting the terms of reference.
69
Improving the transcoding capability of speech coders
TL;DR: Informal listening tests and the perceptual subjective quality measure (PSQM) scores show that the proposed bitstream mapping method has better quality than the cross tandem method, while it has at least 5 ms less delay and six times less computation.
23
A novel transcoding algorithm for AMR and EVRC speech codecs via direct parameter transformation
Sun-Il Lee,Seongho Seo,Dalwon Jang,Chang D. Yoo +3 more
- 06 Apr 2003
TL;DR: A novel transcoding algorithm for the adaptive multi rate (AMR) codec and the enhanced variable rate codec (EVRC) is proposed, which transcodes the parameters of one codec to the other without synthesizing the speech.
•Proceedings Article
Transcoding algorithm for G.723.1 and AMR speech coders: For interoperability between VoIP and mobile networks
Sung Wan Yoon,Jin Kyu Choi,Hong-Goo Kang,Dae Hee Youn +3 more
- 01 Jan 2003
TL;DR: An efficient transcoding algorithm between G.723.1 and AMR speech coders is proposed for providing interoperability between IP and mobile networks and achieves 20~40% reduction of the overall complexity over tandem approach with a shorter processing delay.
7
•Book
Speech Coding and Synthesis
Willem Bastiaan Kleijn,Kuldip K. Paliwal +1 more
- 01 Nov 1995
TL;DR: An introduction to speech coding, W.B. Kleijn evaluation of speech coders, and a robust algorithm for pitch tracking (RAPT), D. McAulay and T.F. Quatieri waveform interpolation for coding and synthesis.