8th European Conference on Speech Communication and Technology

Geneva, Switzerland
September 1-4, 2003


Entropy Constrained Quantization of LSP Parameters

Turaj Zakizadeh Shabestary, Per Hedelin, Fredrik Norden

Chalmers University of Technology, Sweden

Conventional procedures for spectrum coding for speech address fixed rate coding. For the variable rate case, we develop spectrum coding based on constrained entropy quantization. Our approach integrates high rate theory for Gaussian mixture modeling with lattices based on line spectrum pairs. The overall procedure utilizes a union of several lattices in order to enhance performance and to comply with source statistics. We provide experimental results in terms of SD for different conditions and compare these with high rate lower bounds. One major advantage of our coding system concerns adaptivity, one design can operate at a variety of rates without re-training.

Full Paper

Bibliographic reference.  Shabestary, Turaj Zakizadeh / Hedelin, Per / Norden, Fredrik (2003): "Entropy constrained quantization of LSP parameters", In EUROSPEECH-2003, 1121-1124.