Amplitude-adaptive vector quantization system
US4878230A · kind A · utility
254Cited by
9References
4Claims
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Key dates
| Filing date | May 26, 1988 |
| Grant date | Oct 31, 1989 |
| Priority date | — |
| Expiry date | May 26, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An amplitude-adaptive vector quantization system intended for efficient signal coding and decoding. A mean value separation circuit (2) separates the mean value from an input signal which has been divided into blocks, and a tree-search vector quantizer (6) implements tree-search inner product vector quantization so that index information is truncated depending on the detected vector amplitude, thereby reducing the volume of information for transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.