US3127477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic formant locator
Assignee: AT&T Inc
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Filing: 1962-06-27
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Granted: 1964-03-31
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward E David
- 👤 Max V Mathews
- 👤 Joan E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:26
CPC Classifications
G; G10; G10L; G10L19/00; G10L19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
A SYSTEM FOR AUTOMATICALLY LOCATING SPEECH FORMANTS WHICH COMPRISES A SOURCE OF A FIRST CONTROL SIGNAL REPRESENTATIVE OF THE FUNDAMENTAL FREQUENCY OF AN INCOMING SPEECH WAVE, A SOURCE OF A SECOND CONTROL SIGNAL REPRESENTATIVE OF THE ENERGY OF SAID SPEECH WAVE, MEANS FOR GENERATING A PLURALITY OF FORMANT SIGNALS WHOSE VALUES COLLECTIVELY VARY TO REPRESENT SUBSTANTIALLY ALL POSSIBLE COMBINATIONS OF FORMANT LOCATIONS DURING EACH OF A SUCCESSION OF SELECTED TIME PERIODS, MEANS FOR SYNTHESIZING AN ARTIFICIAL SPECTRUM FROM SAID FORMANT SIGNALS AND SAID FIRST AND SECOND CONTROL SIGANLS, FIRST ANALYZING MEANS FOR DERIVING FROM SAID ARTIFICIAL SPECTRUM A FIRST GROUP OF SIGNALS REPRESENTATIVE OF THE AMPLITUDES OF THE INDIVIDUAL FREQUENCY COMPONENTS OF SAID ARTIFICAL SPECTRUM, SECOND ANALYZING MEANS FOR DERIVING FROM THE SPECTRUM OF SAID SPEECH WAVE A SECOND GROUP OF SIGNALS REPRESENTATIVE OF THE AMPLITUDES OF THE INDIVIDUAL FREQUENCY COMPONENTS OF SAID SPEECH SPECTRUM, COMPARING MEANS IN CIRCUIT RELATION WITH SAID FIRST AND SECOND ANALYZING MEANS FOR OBTAINING FROM FIRST AND SECOND GROUPS OF AMPLITUDE SIGNALS AN ERROR SIGNAL REPRESENTATIVE OF A SELECTED MEASURE OF THE DIFFERENCE IN FORMANT LOCATION BETWEEN SAID ARTIFICIAL SPECTRUM AND SAID SPEECH SPECTRUM, MEANS SUPPLIED WITH SAID ERROR SIGNAL FOR SAMPLING THE VALUES OF SAID FORMANT SIGNALS WHICH CORRESPOND TO THE MINIMUM MAGNITUDE OF SAID ERROR SIGNALS DURING EACH OF SAID SELECTED TIME PERIODS.
Claim 2
Independent Claim
220 words
A SYSTEM FOR AUTOMATICALLY LOCATING SPEECH FORMANTS WHICH COMPRISES A SOURCE OF A FIRST CONTROL SIGNAL REPRESENTATIVE OF THE FUNDAMENTAL FREQUENCY OF AN INCOMING SPEECH WAVE, A SOURCE OF A SECOND CONTROL SIGNAL REPRESENTATIVE OF THE ENERGY OF SAID SPEECH WAVE, MEANS FOR GENERATING A PLURALITY OF FORMANT SIGNALS WHOSE VALUES COLLECTIVELY VARY TO REPRESENT SUBSTANTIALLY ALL POSSIBLE COMBINATIONS OF FORMANT LOCATIONS DURING EACH OF A SUCCESSION OF SELECTED TIME PERIODS, MEANS FOR SYNTHESIZING AN ARTIFICIAL SPECTRUM FROM SAID FORMANT SIGNALS AND SAID FIRST AND SECOND CONTROL SIGANLS, FIRST ANALYZING MEANS FOR DERIVING FROM SAID ARTIFICIAL SPECTRUM A FIRST GROUP OF SIGNALS REPRESENTATIVE OF THE AMPLITUDES OF THE INDIVIDUAL FREQUENCY COMPONENTS OF SAID ARTIFICAL SPECTRUM, SECOND ANALYZING MEANS FOR DERIVING FROM THE SPECTRUM OF SAID SPEECH WAVE A SECOND GROUP OF SIGNALS REPRESENTATIVE OF THE AMPLITUDES OF THE INDIVIDUAL FREQUENCY COMPONENTS OF SAID SPEECH SPECTRUM, COMPARING MEANS IN CIRCUIT RELATION WITH SAID FIRST AND SECOND ANALYZING MEANS FOR OBTAINING FROM FIRST AND SECOND GROUPS OF AMPLITUDE SIGNALS AN ERROR SIGNAL REPRESENTATIVE OF A SELECTED MEASURE OF THE DIFFERENCE IN FORMANT LOCATION BETWEEN SAID ARTIFICIAL SPECTRUM AND SAID SPEECH SPECTRUM, MEANS SUPPLIED WITH SAID ERROR SIGNAL FOR SAMPLING THE VALUES OF SAID FORMANT SIGNALS WHICH CORRESPOND TO THE MINIMUM MAGNITUDE OF SAID ERROR SIGNALS DURING EACH OF SAID SELECTED TIME PERIODS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |