Patent US3745238A successfully refreshed from Google Patents.
US3745238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal processing system for multiple signal transmission
Assignee: NIPPON K K COLUMBIA CO Ltd
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Filing: 1971-10-26
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Granted: 1973-07-10
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Expires: 1991-10-26
Abstract
Abstract A signal processing system for multiple signal transmission having a first device for generating a signal with a spectrum equivalent to the frequency spectrum of a crosstalk component, and a second device for subtracting the signal from a composite signal, whereby supurious signals are removed from the composite signal.
Inventors
- 👤 M Yoneyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:13
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A circuit for improving the quality of a television signal derived by a color camera tube so as to eliminate cross talk comprising, a detector filter including a differentiator receiving the luminance signal from said camera tube and producing an output pulse, a pulse-shaper circuit receiving the output of said detector filter and producing a pulse with time width equal to 1/2f1, where f1 is the center frequency of a color separating filter, a sampler receiving the output of said filter detector and said pulse shaper circuit to produce an amplitudemodulated prediction pulse, a low pass filter receiving an output of said camera tube, a first subtractor receiving an output of said sampler, a mixer receiving the output of said low pass filter, a second subtractor receiving an output of said sampler, a first band pass filter and said first subtractor connected between said camera tube and said mixer, a second band pass filter and said second subtractor connected between said camera tube and said mixer.
Claim 2
Dependent Claim
166 words
A circuit for improving the quality of a television signal derived by a color camera tube so as to eliminate cross talk comprising, a detector filter including a differentiator receiving the luminance signal from said camera tube and producing an output pulse, a pulse-shaper circuit receiving the output of said detector filter and producing a pulse with time width equal to 1/2f1, where f1 is the center frequency of a color separating filter, a sampler receiving the output of said filter detector and said pulse shaper circuit to produce an amplitudemodulated prediction pulse, a low pass filter receiving an output of said camera tube, a first subtractor receiving an output of said sampler, a mixer receiving the output of said low pass filter, a second subtractor receiving an output of said sampler, a first band pass filter and said first subtractor connected between said camera tube and said mixer, a second band pass filter and said second subtractor connected between said camera tube and said mixer.
Claim 3
Dependent Claim
30 words
A circuit for improving the quality of a television signal according to claim 1 wherein said first and second band pass filters are ahead of said first and second subtractors.
Claim 4
Dependent Claim
32 words
A circuit for improving the quality of a television signal according to claim 2 including first and second delay means respectively connected between said first and second band pass filters and subtractors.
Claim 5
Dependent Claim
41 words
A circuit for improving the quality of a television signal according to claim 1 including a third band pass filter connected between said sampler and said first subtractor, and a fourth band pass filter connected between sampler and said second subtractor.
Claim 6
Dependent Claim
198 words
A circuit for improving the quality of a television signal derived by a color camera tube so as to eliminate cross talk comprising, a low pass filter receiving an output of said camera tube, a mixer receiving the output of low pass filter, a first band pass filter, a first subtractor connected in series with said first band pass filter between said camera tube and said mixer, a second band pass filter, a second subtractor connected in series with said second band pass filter between said camera tube and said mixer, a first detector filter including a differentiator receiving an output of said camera tube and producing a pulse, a first pulse-shaping circuit receiving the output of said first detector, a first sampler supplying an output to said first subtractor and receiving inputs from said first detector filter and from said first pulse-shaping circuit, a second detector filter including a differentiator receiving an output of said camera tube and producing a pulse, a second pulse-shaping circuit receiving the output of said second detector filter, and a second sampler supplying an output to said second subtractor and receiving inputs from said second detector filter and said second pulse-shaping circuit.
Claim 7
Dependent Claim
198 words
A circuit for improving the quality of a television signal derived by a color camera tube so as to eliminate cross talk comprising, a low pass filter receiving an output of said camera tube, a mixer receiving the output of low pass filter, a first band pass filter, a first subtractor connected in series with said first band pass filter between said camera tube and said mixer, a second band pass filter, a second subtractor connected in series with said second band pass filter between said camera tube and said mixer, a first detector filter including a differentiator receiving an output of said camera tube and producing a pulse, a first pulse-shaping circuit receiving the output of said first detector, a first sampler supplying an output to said first subtractor and receiving inputs from said first detector filter and from said first pulse-shaping circuit, a second detector filter including a differentiator receiving an output of said camera tube and producing a pulse, a second pulse-shaping circuit receiving the output of said second detector filter, and a second sampler supplying an output to said second subtractor and receiving inputs from said second detector filter and said second pulse-shaping circuit.
Claim 8
Dependent Claim
43 words
A circuit for improving the quality of television signal according to claim 5 including first and second delay means respectively connected in series with said first band pass filter and said first subtractor and said second band pass filter and said second subtractor.
Claim 9
Dependent Claim
57 words
A circuit for improving the quality of television signal according to claim 6 including a third detector filter receiving an output of said camera tube, a third pulse-shaping circuit receiving the output of said third detector, a third sampler receiving inputs from said third detector and said third pulse-shaper circuit and supplying inputs to said first subtractor.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |