Multiple-stage vector excitation coding of speech waveforms
- 6 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
An approach to vector-excitation-coding (VXC) speech compression utilizing multiple-stage vector quantization (VQ) is considered. Called multiple-stage VXC (MSVXC), this technique facilitates the use of high-dimensional excitation vectors at medium-band rates without substantially increasing computation. The basic approach consists of successively approximating the input speech vector in several cascaded VQ stages, where the input vector for each stage is the quantization error vector from the preceding stage. It is shown that if a number of VQ stages is increased sufficiently, MSVXC can be expressed as a form of transform coding, in which the computationally intensive excitation codebook search is completely eliminated.Keywords
This publication has 8 references indexed in Scilit:
- Multiple stage vector quantization for speech codingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Complexity reduction methods for vector excitation codingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Real-time vector excitation coding of speech at 4800 bpsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Code-excited linear prediction(CELP): High-quality speech at very low bit ratesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Vector quantization and perceptual criteria for low-rate coding of speechPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Product code vector quantizers for waveform and voice codingIEEE Transactions on Acoustics, Speech, and Signal Processing, 1984
- SPEECH CODING: RECOGNIZING WHAT WE DO NOT HEAR IN SPEECHAnnals of the New York Academy of Sciences, 1983
- An Algorithm for Vector Quantizer DesignIEEE Transactions on Communications, 1980