US4283789A
Expired / Lapsed
US
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Data transmission method and devices for practicing said method
Assignee: International Business Machines Corp
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Filing: 1979-08-29
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Granted: 1981-08-11
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Expires: 1999-08-29
Abstract
Abstract Binary/ternary transmission process and device. Several trains of binary signals are time-multiplexed by using registers RG1 and SER to generate a first binary sequence L applied to an ENCODE unit which also receives a second binary sequence D and clock information CP. When the information of sequence L is at one binary level, the resulting signal is coded in bipolar code. When the information of sequence L is the other binary level, the resulting signal is coded in biphase code.
Inventors
- 👤 Jean L. Monrolin
- 👤 Pierre Vachee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:07
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4923; H04L5/00; H04L5/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A method for encoding a first and a second independent binary signal sequence as a single ternary signal sequence comprising the steps of: grouping time corresponding binary signals of said first and second sequences into pairs, each pair comprising a first binary signal from said first sequence and a second binary signal from said second sequence, and encoding each pair as a bipolar signal when said first binary signal has a first predetermined value, and as a biphase signal when said first binary signal has a value complementary to that of said first predetermined value.
Claim 2
Independent Claim
95 words
A method for encoding a first and a second independent binary signal sequence as a single ternary signal sequence comprising the steps of: grouping time corresponding binary signals of said first and second sequences into pairs, each pair comprising a first binary signal from said first sequence and a second binary signal from said second sequence, and encoding each pair as a bipolar signal when said first binary signal has a first predetermined value, and as a biphase signal when said first binary signal has a value complementary to that of said first predetermined value.
Claim 3
Dependent Claim
45 words
A method according to claim 1, in which the phase of said biphase signal and the polarity of said bipolar signal are selected as a function of the phase of the previously encoded biphase signal and the polarity of the previously encoded bipolar signal, respectively.
Claim 4
Dependent Claim
33 words
A method according to claim 1, in which the binary signals from said second sequence are differentially encoded before being grouped into pairs when said first binary signal has a first given value.
Claim 5
Dependent Claim
29 words
A method according to claim 3, in which the phase of said biphase signal is inverted when the differentially encoded signal in the pair has a second predetermined value.
Claim 6
Independent Claim
105 words
A method for transmitting first and second independent binary signal sequences over a transmission medium as a single ternary signal sequence comprising the steps of: grouping time corresponding binary signals of said first and second sequences into pairs, each pair comprising a first binary signal from said first sequence and a second binary signal from said second sequence, encoding each pair as a bipolar signal when said first binary signal has a first predetermined value, and as a biphase signal when said first binary signal has a value complementary to that of said first predetermined value, and transmitting said encoded signals over said transmission medium.
Claim 7
Independent Claim
105 words
A method for transmitting first and second independent binary signal sequences over a transmission medium as a single ternary signal sequence comprising the steps of: grouping time corresponding binary signals of said first and second sequences into pairs, each pair comprising a first binary signal from said first sequence and a second binary signal from said second sequence, encoding each pair as a bipolar signal when said first binary signal has a first predetermined value, and as a biphase signal when said first binary signal has a value complementary to that of said first predetermined value, and transmitting said encoded signals over said transmission medium.
Claim 8
Dependent Claim
45 words
A method according to claim 5, in which the phase of said biphase signal and the polarity of said bipolar signal are selected as a function of the phase of the previously encoded biphase signal and the polarity of the previously encoded bipolar signal, respectively.
Claim 9
Dependent Claim
33 words
A method according to claim 6, in which the binary signals from said second sequence are differentially encoded before being grouped into pairs when said first binary signal has a first given value.
Claim 10
Dependent Claim
29 words
A method according to claim 7, in which the phase of said biphase signal is inverted when the differentially encoded signal in the pair has a second predetermined value.
Claim 11
Independent Claim
31 words
A method according to any one of claims 1-8 in which one of said binary signal sequences is a time division multiplex signal representing n combined binary signals from n sources.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |