Universal codebook vector quantization with constrained storage
US5889891A · kind A · utility
25Cited by
38References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 21, 1995 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Nov 21, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Vectors associated with multiple sources are quantized with a codebook. A mapping function associates each source with a subset of codevectors in the codebook, each subset being defined prior to quantization. Each vector from a source is matched to a codevector in the subset corresponding to the source. The universal codebook is designed by first providing a codebook and a mapping function. Using the codebook, the mapping function is updated by identifying subsets that reduce distortion when vectors from a source are quantized using a corresponding subset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.