US3755620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single tube color television camera system and method
Assignee: CBS Broadcasting Inc
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Filing: 1972-06-30
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Granted: 1973-08-28
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Expires: 1992-06-30
Abstract
Abstract A color television camera system for producing coherent chroma video signals representative of the color content of a scene. A filter is disposed in the optical path of the scene, the filter having a striped array of colored areas thereon. A single camera tube electronically scans the image projected through the filter and generates color signals representative of the filtered image. The color signals are translated to a lower frequency. Means are provided for projecting, during selected field scans, a uniformly colored field on said filter. The translated color signals generated during the selected field scans are stored in a digital storage circuit. Subsequently, the translated color signals generated during non-selected fields are modified in accordance with the stored signals to produce coherent chroma signals.
Inventors
- 👤 Mann R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:57
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/01
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
125 words
A color television camera system for producing coherent chroma video signals representative of the color content of a scene, comprising: a. a filter disposed in the optical path of the scene, said filter having an array of colored areas thereon; b. means for electronically scanning the image projected through said filter and for generating color signals representative of the filtered image; c. means for translating said color signals to a lower frequency; d. means for projecting, during selected field scans, a uniformly colored field on said filter; e. means for storing the translated color signals generated during said selected field scans; nd f. means for modifying translated color signals generated during non-selected field scans in accordance with the stored signals to produce coherent chroma signals.
Claim 2
Dependent Claim
125 words
A color television camera system for producing coherent chroma video signals representative of the color content of a scene, comprising: a. a filter disposed in the optical path of the scene, said filter having an array of colored areas thereon; b. means for electronically scanning the image projected through said filter and for generating color signals representative of the filtered image; c. means for translating said color signals to a lower frequency; d. means for projecting, during selected field scans, a uniformly colored field on said filter; e. means for storing the translated color signals generated during said selected field scans; nd f. means for modifying translated color signals generated during non-selected field scans in accordance with the stored signals to produce coherent chroma signals.
Claim 3
Dependent Claim
26 words
A system in accordance with claim 1 further comprising means for digitizing the translated color signals generated during said selected field scans before the storage thereof.
Claim 4
Dependent Claim
36 words
A system in accordance with claim 2 further comprising means for mixing the stored signals with a color carrier signal before said stored signals are utilized to modify translated color signals generated during non-selected field scans.
Claim 5
Dependent Claim
28 words
A system in accordance with claim 3 wherein the lower sideband output of said mixing means is utilized to modify translated color signals generated during non-selected field scans.
Claim 6
Dependent Claim
19 words
A system in accordance with claim 3 wherein said color carrier signal has a frequency of about 3.58 MHz.
Claim 7
Dependent Claim
23 words
A system in accordance with claim 1 further comprising means for filtering the color signals from said scanning means to produce luminance signals.
Claim 8
Dependent Claim
26 words
A system in accordance with claim 6 further comprising means for encoding said luminance signals and said coherent chroma signals to produce composite color television signals.
Claim 9
Dependent Claim
25 words
A system in accordance with claim 1 wherein said filter array comprises triplets of colored stripes disposed in a direction perpendicular to the scanning direction.
Claim 10
Dependent Claim
26 words
A system in accordance with claim 8 wherein said stripes have widths that cause the electronic scanning means to generate color signals at about 4.5 MHz.
Claim 11
Dependent Claim
48 words
A system in accordance with claim 9 wherein said means for translating said color signals to a lower frequency comprises an oscillator having a characteristic frequency of about 4 MHz. and a mixer for mixing the oscillator signal with the color signals generated by said electronic scanning means.
Claim 12
Dependent Claim
45 words
A system in accordance with claim 8 wherein said filter stripe triplets consist of red, green and blue stripes having a spatial relationship such that the phase of a color signal generated by the scanning thereof is in accordance with the standard NTSC chrominance phase.
Claim 13
Dependent Claim
15 words
A system in accordance with claim 1 wherein said lower frequency is about .5 MHz.
Claim 14
Dependent Claim
36 words
A system in accordance with claim 1 further comprising means for mixing the stored signals with a color carrier signal before said stored signals are utilized to modify translated color signals generated during non-selected field scans.
Claim 15
Dependent Claim
28 words
A system in accordance with claim 13 wherein the lower sideband output of said mixing means is utilized to modify translated color signals generated during non-selected field scans.
Claim 16
Independent Claim
115 words
A method of producing coherent chroma video signals representative of the color content of a scene, comprising the steps of: a. disposing a filter in the optical path of the scene, the filter having an array of colored areas thereon; b. electronically scanning the image projected through said filter and generating Color signals representative of the filtered image; c. translating said color signals to a lower frequency; d. projecting, during selected field scans, a uniformly colored field on said filter; e. storing the translated color signals generated during said selected field scans; and f. modifying the translated color signals generated during non-selected field scans in accordance with the stored signals to produce coherent chroma signals.
Claim 17
Independent Claim
115 words
A method of producing coherent chroma video signals representative of the color content of a scene, comprising the steps of: a. disposing a filter in the optical path of the scene, the filter having an array of colored areas thereon; b. electronically scanning the image projected through said filter and generating Color signals representative of the filtered image; c. translating said color signals to a lower frequency; d. projecting, during selected field scans, a uniformly colored field on said filter; e. storing the translated color signals generated during said selected field scans; and f. modifying the translated color signals generated during non-selected field scans in accordance with the stored signals to produce coherent chroma signals.
Claim 18
Dependent Claim
27 words
A method in accordance with claim 15 comprising the additional step of digitizing the translated color signals generated during said selected field scans before the storage thereof.
Claim 19
Dependent Claim
37 words
A method in accordance with claim 16 further comprising the step of mixing the stored signals with the color carrier signal before said stored signals are utilized to modify translated color signals generated during non-selected field scans.
Claim 20
Dependent Claim
28 words
A method in accordance with claim 17 wherein the lower sideband output of the mixing step is utilized to modify translated color signals generated during non-selected field scans.
Claim 21
Dependent Claim
24 words
A method in accordance with claim 15 comprising the additional step of filtering the color signals from said scanning means to produce luminance signals.
Claim 22
Dependent Claim
27 words
A method in accordance with claim 19 comprising the additional step of encoding the luminance signals and the coherent chroma signals to produce composite color television signals.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |