US2908761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voice pitch determination
Assignee: AT&T Inc
•
Filing: 1954-10-20
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Granted: 1959-10-13
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Expires: 1974-10-20
Abstract
Abstract 796,677. Vocoder systems. WESTERN ELECTRIC CO., Inc. Oct. 7, 1955 [Oct. 20, 1954], No. 28214/57. Divided out of 796,676. Drawings to Specification. Class 40 (4). [Also in Group XIV (c)] The fundamental period of a complex waveform (e.g. speech) is obtained by applying the signal to a tapped delay line and comparing the undelayed wave with the waves obtained from the tappings and determining the delay for which the output waveform most nearly resembles that of the undelayed wave. The description is identical with part of Specification 796,676. Specification 466,327 also is referred to.
Inventors
- 👤 Raisbeck Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:50
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2401405A
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US2508620A
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US2580421A
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US2705742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |