Proceedings ArticleDOI
A novel embedded speech and audio codec based on ITU-T Recommendation G.722.1
Maoshen Jia,Changchun Bao,Rui Li +2 more
- pp 522-525
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TLDR
This paper describes an embedded speech and audio codec which is based on ITU-T Recommendation G.722.1; it can process 7 kHz bandwidthspeech and audio signal at scalable bit rates and adds two modules: the energy ordering of sub-band and the processing of bit-stream truncation.Abstract:
This paper describes an embedded speech and audio codec which is based on ITU-T Recommendation G.722.1; it can process 7 kHz bandwidth speech and audio signal at scalable bit rates. Based on the G.722.1 of ITU-T, this algorithm adds two modules: the energy ordering of sub-band and the processing of bit-stream truncation. Furthermore, it does some modification on the categorization and noise-fill modules. It makes sure that the codec could produce embedded bit-stream, so this codec had more robustness in the transmission. The test results by ITU-T PESQ show that this codec has good performance as G.722.1 at the same bit-rates.read more
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Proceedings Article
A novel super-wideband embedded speech and audio codec based on ITU-T Recommendation G.729.1
TL;DR: A multi-layer super-wideband embedded speech and audio coding algorithm extending bit rates from 36 to 64 kb/s on the basis of ITU-T Recommendation G.729.1 with a multi-stage coding structure that has good performance compared with reference codec.
References
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Proceedings ArticleDOI
A scalable speech and audio coding scheme with continuous bitrate flexibility
TL;DR: The paper presents a novel scalable audio coding scheme where the bitrates vary continuously between a minimal and a maximal value, allowing free modification of the bitrate.
Journal ArticleDOI
From ITU-T G.722.1 to ITU-T G.722.1 Annex C: A New Low-Complexity 14kHz Bandwidth Audio Coding Standard
TL;DR: The low-complexity 14kHz bandwidth audio coding algorithm which has been recently standardized by ITU-T as Recommendation G.722.1C is described, suitable for use in video conferencing and teleconferencing, and Internet streaming applications as well as a general-purpose 14 kHz audio codec.
Journal Article
Embedded wideband speech codec based on ACELP and TCX
TL;DR: This paper presents an embedded wideband speech codec which is one candidate for the G.VBR proposed by the telecommunication standardization sector(ITU-T) and shows that the codec meets the ITu-T requirements.