US4566117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech synthesis system
Assignee: Motorola Solutions Inc
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Filing: 1982-10-04
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Granted: 1986-01-21
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Expires: 2002-10-04
Abstract
Abstract A speech synthesis system uses a programmable digital divider to generate desired formant frequencies. The divide factor is controlled by an MPU. The output of the divider is passed through a sinewave shaper and then through an electronically controlled amplitude amplifier to provide an audio output. The system is based upon the realization that alternating between two formant frequencies at the pitch rate generates a sound comparable to generating two formants simultaneously and adding algebraically.
Inventors
- 👤 Leonard I. Suckle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
G; G10; G10L; G10L25/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A method of generating elements of speech comprising: providing a short duration of a first formant frequency; providing a short duration of a second formant frequency; and alternating between the first and second formant frequencies at a pitch frequency rate.
Claim 2
Independent Claim
40 words
A method of generating elements of speech comprising: providing a short duration of a first formant frequency; providing a short duration of a second formant frequency; and alternating between the first and second formant frequencies at a pitch frequency rate.
Claim 3
Dependent Claim
19 words
The method of claim 1 including switching multiple formant frequencies at a rate to repeat at the pitch frequency.
Claim 4
Dependent Claim
21 words
The method of claim 2 including using a microprocessor to control a programmable frequency divider to derive the desired formant frequencies.
Claim 5
Dependent Claim
14 words
The method of claim 2 including using a microcomputer to generate the formant frequencies.
Claim 6
Dependent Claim
17 words
The method of claim 2 including using a microcomputer to generate unvoiced speech sounds to generate phonomes.
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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |