Name
Title | ||
|---|---|---|
ITU-T G.729.1: AN 8-32 Kbit/S Scalable Coder Interoperable with G.729 for Wideband Telephony and Voice Over IP. |
Abstract | ||
|---|---|---|
This paper describes the scalable coder - G.729.1 - which has been recently standardized by ITU-T for wideband telephony and voice over IP (VoIP) applications. G.729.1 can operate at 12 different bit rates from 32 down to 8 kbit/s with wideband quality starting at 14kbit/s. This coder is a bitstream interoperable extension of ITU-T G.729 based on three embedded stages: narrowband cascaded CELP coding at 8 and 12 kbit/s, time-domain bandwidth extension (TDBWE) at 14 kbit/s, and split-band MDCT coding with spherical vector quantization (VQ) and pre-echo reduction from 16 to 32 kbit/s. Side information - consisting of signal class, phase, and energy - is transmitted at 12, 14 and 16 kbit/s to improve the resilience and recovery of the decoder in case of frame erasures. The quality, delay, and complexity of G.729.1 are summarized based on ITU-T results. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/ICASSP.2007.366966 | ICASSP |
Keywords | Field | DocType |
Internet telephony,broadband networks,decoding,linear predictive coding,speech coding,transform coding,vector quantisation,8 to 32 kbit/s,ITU-T G.729.1,VoIP,decoder,narrowband cascaded CELP coding,pre-echo reduction,spherical vector quantization,split-band MDCT coding,time-domain bandwidth extension,voice over IP,wideband telephony,ITU,Speech coding,standardization | Speech coding,Computer science,Bandwidth extension,Computer network,Artificial intelligence,Computer hardware,Wideband,Code-excited linear prediction,Pattern recognition,Harmonic Vector Excitation Coding,Telephony,Bitstream,G.729.1 | Conference |
Volume | ISSN | Citations |
4 | 1520-6149 | 36 |
PageRank | References | Authors |
3.36 | 3 | 19 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Stéphane Ragot | 1 | 73 | 9.92 |
| Balázs Kövesi | 2 | 57 | 9.57 |
| Romain Trilling | 3 | 36 | 3.36 |
| David Virette | 4 | 95 | 8.77 |
| Nicolas Duc | 5 | 36 | 3.36 |
| Dominique Massaloux | 6 | 36 | 3.69 |
| Stéphane Proust | 7 | 40 | 4.58 |
| B. Geiser | 8 | 122 | 15.25 |
| Martin Gartner | 9 | 37 | 3.73 |
| S. Schandl | 10 | 50 | 6.01 |
| Hervé Taddei | 11 | 51 | 10.67 |
| Yang Gao | 12 | 73 | 9.31 |
| Eyal Shlomot | 13 | 36 | 3.69 |
| Hiroyuki Ehara | 14 | 79 | 11.17 |
| Koji Yoshida | 15 | 36 | 4.03 |
| Tommy Vaillancourt | 16 | 83 | 8.83 |
| Redwan Salami | 17 | 168 | 22.49 |
| Mi Suk Lee | 18 | 56 | 10.30 |
| Do-Young Kim | 19 | 37 | 6.54 |