Adaptive transform coder having minimal bit allocation processing
US4964166A · kind A · utility
49Cited by
8References
16Claims
0Family size
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Key dates
| Filing date | May 26, 1988 |
| Grant date | Oct 16, 1990 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Adaptive transform coding of a speech signal by a single digital signal processing chip is performed at low bit rates with reduced quantization noise and distortion. A windowed speech signal is transformed and quantized. New processes are shown for generating envelope information as well as bit allocation which control quantization. The quantized signal and necessary side information are formatted for transmission and subsequent decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.