Patent US4463376A successfully refreshed from Google Patents.
US4463376A
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Television signal processing system for a wireless pay system
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1983-07-21
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Granted: 1984-07-31
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Expires: 2003-07-21
Abstract
Abstract A television signal processing system characterized in that a level of at least a portion of a blanking interval of a coded television signal is shifted towards a white level and falling of the level shifting interval is shaped into a smooth waveform.
Inventors
- 👤 Hiroshi Osaka
- 👤 Akira Honma
- 👤 Ryokichi Kanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:50
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/171
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A television signal processing system which comprises: a gate means having horizontal and vertical drive signals as inputs for producing as an output a pulse signal having only vertical blanking pulse intervals including horizontal blanking intervals; a filter means having said gate means pulse signal as an input for shaping the rising and falling portions of said pulse signal into a smooth wave form to produce a smoothed pulse signal; and an adder means having as inputs said filter means smoothed pulse signal and a television signal so coded that synchronizing signal components thereof are inverted with reference to a pedestal portion thereof for adding said filter means smoothed pulse signal and said coded television signal, to produce a shifted television signal so that a level of at least a portion of the blanking interval of the television signal is shifted towards a white level of a video component and the wave forms of the rising and falling of the level shifting are smoothed.
Claim 2
Dependent Claim
164 words
A television signal processing system which comprises: a gate means having horizontal and vertical drive signals as inputs for producing as an output a pulse signal having only vertical blanking pulse intervals including horizontal blanking intervals; a filter means having said gate means pulse signal as an input for shaping the rising and falling portions of said pulse signal into a smooth wave form to produce a smoothed pulse signal; and an adder means having as inputs said filter means smoothed pulse signal and a television signal so coded that synchronizing signal components thereof are inverted with reference to a pedestal portion thereof for adding said filter means smoothed pulse signal and said coded television signal, to produce a shifted television signal so that a level of at least a portion of the blanking interval of the television signal is shifted towards a white level of a video component and the wave forms of the rising and falling of the level shifting are smoothed.
Claim 3
Dependent Claim
46 words
A system according to claim 1, wherein said gate circuit includes a monostable multivibrator to which said horizontal drive signal is inputted and a monostable multivibrator to which said vertical drive signal is inputted and a NOR gate to which outputs from said multivibrators are applied.
Claim 4
Dependent Claim
35 words
A system according to claim 1, wherein said filter is a low pass filter for shaping the rising and falling portions of the pulses of said gate means pulse signal to approximate a sine wave.
References Cited (Backward Citations)
US3081376A
Cited
US3439113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |