Speaker independent speech recognition system and method using neural network and DTW matching technique
US5528728A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 12, 1993 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Jul 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2015/025
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Improved speaker independent speech recognition system and method are disclosed in which an utterance by an unspecified person into an electrical signal is input through a device such as a telephone, the electrical signal from the input telephone converting the electrical signal into a time series of characteristic multidimensional vectors, the time series of characteristic multidimensional vectors are received, each of the vectors being converted into a plurality of candidates so that the plurality of phonemes constitutes a plurality of strings of phonemes in time series as a plurality of candidates, the plurality of candidates of phonemes are compared simultaneously (one at a time) with a reference pattern of a reference string of phonemes for each word previously stored in a dictionary to determine which string of phonemes derived from the phoneme recognition means has a highest similarity to one of the reference strings of the phonemes for the respective words stored in the dictionary using a predetermined word matching technique, and at least one candidate of the words as a result of word recognition on the basis of one of the plurality of the strings of phonemes which has the…
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