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US4063280A
Expired / Lapsed
US
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Chroma-signal processing system
Assignee: Panasonic Holdings Corp
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Filing: 1976-09-27
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Granted: 1977-12-13
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Expires: 1996-09-27
Abstract
Abstract Chroma-signal processing system is disclosed wherein a color television signal is sampled at a frequency equal to a sub-carrier frequency multiplied by an integer, and chroma-components of the sampled signals are sequentially stored in a plurality of storage means for each of the sample points, and the chroma-signals are retrieved from the storage means while omitting portions of the chroma signals whereby accomplishing the chroma-signal processing with a fewer number of storage means. The system can be used to reduce the size of a displayed color image without introducing phase discontinuities into the chrominance subcarrier. The reduced image may then be inset into another color image displayed on a CRT. The system may also be used to reduce the subcarrier frequency of a chrominance signal.
Inventors
- 👤 Hajime Hattori
- 👤 Tadashi Okada
- 👤 Eiji Kezuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:18
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/445; H04N5/45; H04N9/00; H04N9/64; H04N9/641
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
94 words
A chroma-signal processing system comprising the steps of preparing a sampling signal having a sampling frequency which is n times as high as a frequency of a sub-carrier, n being an integer, sampling a color television signal by said sampling signal, storing chroma components of the sampled color television signals in storage means which are equal in number to the number of sampling points included in one or more cycles of the sub-carrier, reading out the stored chroma components while intermittently omitting portions of the chroma components whereby a continuous color component is reproduced.
Claim 2
Dependent Claim
94 words
A chroma-signal processing system comprising the steps of preparing a sampling signal having a sampling frequency which is n times as high as a frequency of a sub-carrier, n being an integer, sampling a color television signal by said sampling signal, storing chroma components of the sampled color television signals in storage means which are equal in number to the number of sampling points included in one or more cycles of the sub-carrier, reading out the stored chroma components while intermittently omitting portions of the chroma components whereby a continuous color component is reproduced.
Claim 3
Dependent Claim
56 words
A chroma-signal processing system according to claim 1 wherein n storage means for maintaining inputs thereto for one cycle of the sub-carrier are provided, and the sampled chroma signals are sequentially stored in said storage means at each sampling point, and the outputs of said n storage means are sequentially selected to derive the chroma signal.
Claim 4
Dependent Claim
22 words
A chroma-signal processing system according to claim 1 wherein said sampled chroma components are stored in digital code in said storage means.
Claim 5
Dependent Claim
25 words
A chroma-signal processing system according to claim 1 wherein said storage means are capacitors and the sampled chroma signals are sequentially stored in the capacitors.
Claim 6
Dependent Claim
102 words
A chroma-signal processing system comprising the steps of sampling a color television signal at a frequency which is n times as high as a frequency of a first sub-carrier, n being a positive integer, storing chroma components of the sampled television signal in n storage means and maintaining them for one cycle of the sub-carrier, reading the stored chroma components by selecting said storage means by clock pulses having a frequency which is n times a high as a frequency of a second sub-carrier different from said frequency of said first sub-carrier, whereby the sub-carrier frequency of the chroma components is converted.
Claim 7
Dependent Claim
102 words
A chroma-signal processing system comprising the steps of sampling a color television signal at a frequency which is n times as high as a frequency of a first sub-carrier, n being a positive integer, storing chroma components of the sampled television signal in n storage means and maintaining them for one cycle of the sub-carrier, reading the stored chroma components by selecting said storage means by clock pulses having a frequency which is n times a high as a frequency of a second sub-carrier different from said frequency of said first sub-carrier, whereby the sub-carrier frequency of the chroma components is converted.
Claim 8
Dependent Claim
22 words
A chroma-signal processing system according to claim 5 wherein said sampled chroma signals are stored in digital code in said storage means.
References Cited (Backward Citations)
US3946432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |