US3381093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech coding using axis-crossing and amplitude signals
Assignee: AT&T Inc
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Filing: 1965-08-04
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Granted: 1968-04-30
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Expires: 1985-08-04
Abstract
No abstract record available.
Inventors
- 👤 James L Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:05
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/90; G10L19/00; G10L19/02; G10L19/0204; G10L19/0208; H; H04; H04B; H04B1/00; H04B1/66; H04B1/667; G10L25/03; G10L25/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COMMUNICATION SYSTEM FOR CONVEYING THE INFORMATION CONTENT OF A SPEECH WAVE OVER A CHANNEL OF RELATIVELY SMALL CAPACITY WHICH COMPRISES, MEANS FOR DIVIDING SAID SPEECH WAVE INTO CONTIGUOUS FREQUENCY SUBBANDS, MEANS FOR TRANSMITTING TO A RECEIVER STATION IN CODED FORM EACH AXIS CROSSING OF EACH OF SAID SUBBANDS AND THE SHORT-TIME AVERAGE AMPLITUDE VARIATIONS OF EACH OF SAID SUBBANDS, AND AT SAID RECEIVER STATION, MEANS FOR RECONSTRUCTING A REPLICA OF SAID SPEECH WAVE FROM SAID AXIS CROSSINGS AND SAID SHORT-TIME AVERAGE AMPLITUDE VARIATIONS.
Claim 2
Dependent Claim
84 words
A COMMUNICATION SYSTEM FOR CONVEYING THE INFORMATION CONTENT OF A SPEECH WAVE OVER A CHANNEL OF RELATIVELY SMALL CAPACITY WHICH COMPRISES, MEANS FOR DIVIDING SAID SPEECH WAVE INTO CONTIGUOUS FREQUENCY SUBBANDS, MEANS FOR TRANSMITTING TO A RECEIVER STATION IN CODED FORM EACH AXIS CROSSING OF EACH OF SAID SUBBANDS AND THE SHORT-TIME AVERAGE AMPLITUDE VARIATIONS OF EACH OF SAID SUBBANDS, AND AT SAID RECEIVER STATION, MEANS FOR RECONSTRUCTING A REPLICA OF SAID SPEECH WAVE FROM SAID AXIS CROSSINGS AND SAID SHORT-TIME AVERAGE AMPLITUDE VARIATIONS.
References Cited (Backward Citations)
US3102928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |