US3343087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quantization noise reduction system using chirp network prior to quantizing
Assignee: AT&T Inc
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Filing: 1964-09-02
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Granted: 1967-09-19
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Expires: 1984-09-02
Abstract
No abstract record available.
Inventors
- 👤 Howard D Helms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:24
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
APPARATUS INCLUDING A PULSE CODE TRANSMISSION SYSTEM UTILIZING QUANTIZATION COMPRISING, IN COMBINATION: A FIRST CHIRP NETWORK FOR SELECTIVELY DISPERSING FREQUENCY COMPONENTS OF AN APPLIED ANALOG SIGNAL PRIOR TO QUANTIZATION, AND A SECOND CHIRP NETWORK POSITIONED AT THE RECEIVING END OF SAID TRANSMISSION SYSTEM FOR RECONSTITUTING INTO THEIR ORIGINAL ORDER SAID DISPERSED COMPONENTS AND REORDERING THE STATISTICAL DISTRIBUTION OF NOISE INTRODUCED BY SAID QUANTIZATION.
Claim 2
Dependent Claim
63 words
APPARATUS INCLUDING A PULSE CODE TRANSMISSION SYSTEM UTILIZING QUANTIZATION COMPRISING, IN COMBINATION: A FIRST CHIRP NETWORK FOR SELECTIVELY DISPERSING FREQUENCY COMPONENTS OF AN APPLIED ANALOG SIGNAL PRIOR TO QUANTIZATION, AND A SECOND CHIRP NETWORK POSITIONED AT THE RECEIVING END OF SAID TRANSMISSION SYSTEM FOR RECONSTITUTING INTO THEIR ORIGINAL ORDER SAID DISPERSED COMPONENTS AND REORDERING THE STATISTICAL DISTRIBUTION OF NOISE INTRODUCED BY SAID QUANTIZATION.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |