Name
Abstract | ||
|---|---|---|
The adaptive codebook used in CELP-like speech coders is extremely effective on voiced signals. Unfortunately, it is also the main source of error propagation at the decoder when a frame is lost. In this paper, we study several ways of limiting the energy contribution of the adaptive codebook to the synthesized speech signal. We show that a constrained search of the adaptive and innovative codebooks significantly improves the recovery time of the decoder after a lost frame, at the cost of only minor quality degradation in clear channel. When applied to a standard codec such as the AMR-WB, this constraint only affects the encoder, and die modified codec remains fully interoperable with the standard codec. |
Year | DOI | Venue |
|---|---|---|
2005 | 10.1109/ICASSP.2005.1415231 | ICASSP '05). IEEE International Conference |
Keywords | Field | DocType |
adaptive codes,adaptive decoding,linear predictive coding,optimisation,search problems,speech codecs,speech coding,speech synthesis,CELP-based coders,adaptive codebook,constrained optimization,constrained search,decoder,error propagation,limited energy contribution,modified codec,robustness,speech coders,synthesized speech signal | Vector sum excited linear prediction,Code-excited linear prediction,Adaptive Multi-Rate audio codec,Computer science,Voice activity detection,Full Rate,Speech recognition,Codec2,Codec,Codebook | Conference |
Volume | ISSN | ISBN |
1 | 1520-6149 | 0-7803-8874-7 |
Citations | PageRank | References |
2 | 0.43 | 2 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Mohamed Chibani | 1 | 2 | 0.43 |
| Philippe Gournay | 2 | 18 | 5.99 |
| Lefebvre, R. | 3 | 93 | 18.55 |