Continuous speech recognition apparatus
US4087630A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1977 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | May 12, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L15/00
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus and method wherein speech or other signals are sampled during a time slice of approximately 1/30 second and spectrum analysis is performed on the samples, producing measures of amplitude in several frequency bands with each frequency band being characterized by a binary digit indicating the presence or absence of significant amplitude. The binary digits are collectively referred to as a sonogram. Sonograms for several time slices are then concatenated, randomized and decoded using an n-tuple technique to produce a pattern corresponding to the current speech signal. This pattern is learned by superimposing it on an existing vocabulary entry and is subsequently recognized if it is sufficiently similar to one vocabulary entry and different from all others.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.