Method for signal encoding and feature extraction
US6151414A · kind A · utility
14Cited by
3References
16Claims
0Family size
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Key dates
| Filing date | Jan 30, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jan 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F18/2135
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A new encoder is provided which operates on a database of n-dimensional signal vectors where such signal vectors are restricted to being non-negative. In the establishment of a codebook for this encoder, p signal vectors (of dimension n) are placed in an n.times.p matrix X, and an approximate factorization: X.apprxeq.WV is constructed, where W and V are matrices whose entries are non-negative. Each column of the n.times.r matrix W is characterized as a "feature", such features having been "learned" from the database of n-dimensional signal vectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.