| Paper: | SP-P5.12 | ||
| Session: | Topics in Speech Coding | ||
| Time: | Wednesday, May 19, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Speech Processing: Wideband Speech Coding | ||
| Title: | LOW-COMPLEXITY MULTI-RATE LATTICE VECTOR QUANTIZATION WITH APPLICATION TO WIDEBAND TCX SPEECH CODING AT 32 KBIT/S | ||
| Authors: | Stéphane Ragot; University of Sherbrooke | ||
| Bruno Bessette; University Sherbrooke | |||
| Roch Lefebvre; University Sherbrooke | |||
| Abstract: | We present a new method, called Voronoi extension, for the design of low-complexity multi-rate lattice vector quantization (VQ). With this technique, lattice codebooks of arbitrarily large bit rates can be generated algorithmically and the problem of lattice codebook overload can be bypassed. We describe a practical multi-rate quantization system based on Voronoi extension and derived from the lattice RE8. This system is applied to the TCX coding model using pitch prediction, so asto extend AMR-WB speech coding at high bit rates (in particular 32 kbit/s). | ||
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