Multimode coding: application to CELP
| Autor: | Tomohiko Taniguchi, Shigeyuki Unagami, Robert M. Gray |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Code-excited linear prediction
Voice activity detection Computer science Selectable Mode Vocoder Speech recognition Speech coding Tunstall coding Variable-length code Linear predictive coding Coding tree unit Coding gain Sub-band coding Adaptive Multi-Rate audio codec Codec2 Vector sum excited linear prediction Harmonic Vector Excitation Coding Context-adaptive binary arithmetic coding Context-adaptive variable-length coding |
| Zdroj: | ICASSP |
| DOI: | 10.1109/icassp.1989.266387 |
| Popis: | The authors introduce a novel approach to narrow- and medium-band speech coding that can dynamically balance the transmission rate between the excitation and the spectral parameters. The coding algorithm, called multimode coding, operates several coding blocks, each of which has a different bit assignment in parallel, and selects the optimum coding block frame by frame based on an evaluation of the reproduced speech quality. This coding algorithm is applied to 4.8 and 8.0 kb/s CELP coders, and 2.0-2.4 dB of SNRseg improvement is achieved over conventional CELP coders. The spectral distortion measure is added as an evaluation function, improving the subjective speech quality. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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