US4516215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recognition of speech or speech-like sounds
Assignee: Sharp Corp
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Filing: 1982-09-09
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Granted: 1985-05-07
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Expires: 2002-09-09
Abstract
Abstract Speech recognition using self-correlation (auto-correlation) parameters and time normalization is improved by first making a preliminary decision using lower-order (zeroth to third) self-correlation coefficients derived from the self-correlation function of order m: ##EQU1## where φ(0) is the power, φ(1) is the linear or first order coefficient, and so on.
Inventors
- 👤 Mitsuhiro Hakaridani
- 👤 Hiroyuki Iwahashi
- 👤 Yoshiki Nishioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:56
CPC Classifications
G; G10; G10L; G10L15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A method of speech recognition comprising the steps of creating self-correlation functions for input sound signals, deciding the intervals of the sound signals, normalizing the time axes in conjunction with the sound intervals, and conducting recognition of words or the like through decisions using said self-correlation functions as feature parameters where there is matching with reference patterns, said method further comprising the step of effecting preliminary selection prior to the final recognition step by means of linear matching using said self-correlation functions of lower degrees.
Claim 2
Independent Claim
85 words
A method of speech recognition comprising the steps of creating self-correlation functions for input sound signals, deciding the intervals of the sound signals, normalizing the time axes in conjunction with the sound intervals, and conducting recognition of words or the like through decisions using said self-correlation functions as feature parameters where there is matching with reference patterns, said method further comprising the step of effecting preliminary selection prior to the final recognition step by means of linear matching using said self-correlation functions of lower degrees.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |