US4775984A
Expired / Lapsed
US
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Synchronous digital cable transmission system
Assignee: Alcatel CIT SA
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Filing: 1987-07-28
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Granted: 1988-10-04
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Expires: 2007-07-28
Abstract
Abstract A synchronous digital cable transmission system comprises a transmitting terminal, intermediate regenerative repeaters and a receiving terminal. The transmitting terminal includes a data scrambler and a 6B/4T type binary-ternary line coder. The receiving terminal and the intermediate regenerated repeaters include a class 1 type n=2 partial response coding type receive signal shaping and filtering unit and a logic device for decrypting binary symbol superpositions resulting from the signal shaping and filtering processes. The receiving terminal also includes a 6B/4T binary-ternary decoder and a descrambler respectively compatible with the coder and the scrambler in the transmitting terminal.
Inventors
- 👤 Pierre Jaffre
- 👤 Bernard Le Mouel
- 👤 Jean-Francois Robin
- 👤 Pierre Thepaut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:05
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
Synchronous digital cable transmission system comprising in order and in series, a transmit terminal, intermediate connected in order and in series, for transmitting, regenerating and receiving data signals, respectively, said transmit terminal comprising, a data scrambler inputting to a 6B/4T type binary-ternary line coder said intermediate regenerative repeaters and said receive terminal comprising a, class 1 type n=2 partial response coding type receive line shaping and filtering means out inputting to a logic means for decrypting binary symbol superpositions produced by signal shaping and filtering, and said receive inputting to terminal also comprising and a 6B/4T binary-ternary decoder receiving signals from said logic means of said receive terminal and inputting to a descrambler said 6B/4T decoder and said descrambler being compatible with said coder and said scrambler, respectively, in said transmit terminal.
Claim 2
Dependent Claim
132 words
Synchronous digital cable transmission system comprising in order and in series, a transmit terminal, intermediate connected in order and in series, for transmitting, regenerating and receiving data signals, respectively, said transmit terminal comprising, a data scrambler inputting to a 6B/4T type binary-ternary line coder said intermediate regenerative repeaters and said receive terminal comprising a, class 1 type n=2 partial response coding type receive line shaping and filtering means out inputting to a logic means for decrypting binary symbol superpositions produced by signal shaping and filtering, and said receive inputting to terminal also comprising and a 6B/4T binary-ternary decoder receiving signals from said logic means of said receive terminal and inputting to a descrambler said 6B/4T decoder and said descrambler being compatible with said coder and said scrambler, respectively, in said transmit terminal.
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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |