Patent US3091665A successfully refreshed from Google Patents.
US3091665A
Expired / Lapsed
US
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Autocorrelation vocoder equalizer
Assignee: AT&T Inc
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Filing: 1960-06-03
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Granted: 1963-05-28
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Expires: 1980-06-03
Abstract
No abstract record available.
Inventors
- 👤 Manfred R Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
G; G10; G10L; G10L25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A SPEECH TRANSMISSION SYSTEM THE COMBINATION THAT COMPRISES A SOURCE OF AN INCOMING SPEECH WAVE, MEANS FOR OBTAINING A GROUP OF SIGNALS REPRESENTATIVE OF THE FORMANTS OF SAID SPEECH WAVE, MEANS FOR SELECTIVELY MODIFYING THE MAGNITUDE OF SAID FORMANT SIGNALS BY DIVIDING EACH OF SAID FORMANT SIGNALS BY THE SQUARE ROOT OF ITS AVERAGE ABSOLUTE MAGNITUDE, MEANS FOR COMBINING SAID SELECTIVE MODIFIED FORMANT SIGNALS TO FORM AN EQUALIZED SPEECH WAVE, AN AUTOCORRELATION VOCODER COMPRISING AN ANALYZER TERMINAL, A NARROW-BAND TRANSMISSION CHANNEL, AND A SYNTHESIZER TERMINAL, AND MEANS FOR APPLYING SAID EQUALIZED SPEECH WAVE TO THE ANALYZER TERMINAL OF SAID AUTOCORRELATION VOCODER.
Claim 2
Dependent Claim
102 words
IN A SPEECH TRANSMISSION SYSTEM THE COMBINATION THAT COMPRISES A SOURCE OF AN INCOMING SPEECH WAVE, MEANS FOR OBTAINING A GROUP OF SIGNALS REPRESENTATIVE OF THE FORMANTS OF SAID SPEECH WAVE, MEANS FOR SELECTIVELY MODIFYING THE MAGNITUDE OF SAID FORMANT SIGNALS BY DIVIDING EACH OF SAID FORMANT SIGNALS BY THE SQUARE ROOT OF ITS AVERAGE ABSOLUTE MAGNITUDE, MEANS FOR COMBINING SAID SELECTIVE MODIFIED FORMANT SIGNALS TO FORM AN EQUALIZED SPEECH WAVE, AN AUTOCORRELATION VOCODER COMPRISING AN ANALYZER TERMINAL, A NARROW-BAND TRANSMISSION CHANNEL, AND A SYNTHESIZER TERMINAL, AND MEANS FOR APPLYING SAID EQUALIZED SPEECH WAVE TO THE ANALYZER TERMINAL OF SAID AUTOCORRELATION VOCODER.
References Cited (Backward Citations)
US2819341A
Cited
US2857465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |