| Presentation | 1999/2/19 Extentions to ITU-T Rccommendation G.729 and its quality assessment Shinji Hayashi, Sachiko Kurihara, Akitoshi Kataoka, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper describes the extended alogorithms of CS-ACELP that were standardized as Annexes C, D, E to G.729. Annex C is a reference implementation using floating-point arithmetic that is compatible with the fixed-point implementation of the main body. Annexes D and E are the variable bit-rate extentions that operate at 6.4 and 11.8 kbit/s. These algorithms are based on the same blocks as the main body with little additional memory and may be switched frame by frame, which increases flexibility in operation in various applications. The subjective test shows that Annex D provides very little quality loss from the main body at 8 kbit/s and Annex E provides good quality under background-noise conditions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CS-ACLEP / Speech coding / Subjective assessment / Vector Gain Quantization / DCR |
| Paper # | SP98-143 |
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| Conference Information | |
| Committee | SP |
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| Conference Date | 1999/2/19(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
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| Paper Information | |
| Registration To | Speech (SP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Extentions to ITU-T Rccommendation G.729 and its quality assessment |
| Sub Title (in English) | |
| Keyword(1) | CS-ACLEP |
| Keyword(2) | Speech coding |
| Keyword(3) | Subjective assessment |
| Keyword(4) | Vector Gain Quantization |
| Keyword(5) | DCR |
| 1st Author's Name | Shinji Hayashi |
| 1st Author's Affiliation | Cyber Space Laboratorics, NTT() |
| 2nd Author's Name | Sachiko Kurihara |
| 2nd Author's Affiliation | Cyber Space Laboratorics, NTT |
| 3rd Author's Name | Akitoshi Kataoka |
| 3rd Author's Affiliation | Business Communications Headquarters, Osaka Branch, NTT |
| Date | 1999/2/19 |
| Paper # | SP98-143 |
| Volume (vol) | vol.98 |
| Number (no) | 611 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |