GB1359192A - Tint correction circuits - Google Patents
Tint correction circuitsInfo
- Publication number
- GB1359192A GB1359192A GB3353171A GB3353171A GB1359192A GB 1359192 A GB1359192 A GB 1359192A GB 3353171 A GB3353171 A GB 3353171A GB 3353171 A GB3353171 A GB 3353171A GB 1359192 A GB1359192 A GB 1359192A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- chrominance signal
- gate pulse
- july
- chrominance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/643—Hue control means, e.g. flesh tone control
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
1359192 Flesh tone correction RCA CORPORATION 16 July 1971 [22 July 1970] 33531/71 Heading H4F Flesh tone correction of a displayed colour television image is carried out by adjusting at 25 the phase of the reference signal fed from oscillator 20 to the colour demodulators, in response to the filtered output of a phase detector 23 which produces a zero output for chrominance signals of +I phase, and respective positive and negative outputs when the phase of the chrominance signal is on either side of, and near to, +I phase. Phase detector 23 is only operative when it is receiving a gate pulse G 3 indicating that the chrominance signal is within a specified phase of + I phase, this gate pulse being produced when respective gate pulses (G 1 , G 2 , Fig. 1, not shown) representative, respectively, of the chrominance signal phase, and the specified phase about +I phase, coincide. In a further embodiment, which does not form part of the present invention (Fig. 1a, not shown), gate pulse G 3 is passed via a filter to control the amplitude of the chrominance signal fed to the Q demodulator.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5727770A | 1970-07-22 | 1970-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1359192A true GB1359192A (en) | 1974-07-10 |
Family
ID=22009607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3353171A Expired GB1359192A (en) | 1970-07-22 | 1971-07-16 | Tint correction circuits |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5550436B1 (en) |
| AT (1) | AT333864B (en) |
| AU (1) | AU466169B2 (en) |
| BE (1) | BE770296A (en) |
| CA (1) | CA997859A (en) |
| DE (1) | DE2136736C3 (en) |
| ES (1) | ES393528A1 (en) |
| FR (1) | FR2099520B1 (en) |
| GB (1) | GB1359192A (en) |
| MY (1) | MY7500148A (en) |
| NL (1) | NL7110049A (en) |
| SE (1) | SE376352B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567348B2 (en) * | 1973-04-25 | 1981-02-17 | ||
| USRE34169E (en) * | 1984-04-27 | 1993-01-26 | Colorgraphics Systems, Inc. | Phase responsive composite video signal control system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL195130A (en) * | 1954-02-26 | |||
| US3436470A (en) * | 1966-04-20 | 1969-04-01 | Rca Corp | Hue adjust circuit for a color television receiver |
| JPS501852A (en) * | 1973-05-10 | 1975-01-09 |
-
1971
- 1971-07-15 AU AU31264/71A patent/AU466169B2/en not_active Expired
- 1971-07-16 GB GB3353171A patent/GB1359192A/en not_active Expired
- 1971-07-20 BE BE770296A patent/BE770296A/en not_active IP Right Cessation
- 1971-07-21 SE SE937671A patent/SE376352B/xx unknown
- 1971-07-21 NL NL7110049A patent/NL7110049A/xx not_active Application Discontinuation
- 1971-07-21 CA CA118,801A patent/CA997859A/en not_active Expired
- 1971-07-21 FR FR7126749A patent/FR2099520B1/fr not_active Expired
- 1971-07-22 AT AT640271A patent/AT333864B/en not_active IP Right Cessation
- 1971-07-22 JP JP5491271A patent/JPS5550436B1/ja active Pending
- 1971-07-22 DE DE19712136736 patent/DE2136736C3/en not_active Expired
- 1971-07-22 ES ES393528A patent/ES393528A1/en not_active Expired
-
1975
- 1975-12-30 MY MY7500148A patent/MY7500148A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CA997859A (en) | 1976-09-28 |
| DE2136736A1 (en) | 1972-01-27 |
| AT333864B (en) | 1976-12-10 |
| DE2136736B2 (en) | 1973-04-19 |
| AU466169B2 (en) | 1975-10-23 |
| NL7110049A (en) | 1972-01-25 |
| FR2099520B1 (en) | 1977-04-22 |
| BE770296A (en) | 1971-12-01 |
| AU3126471A (en) | 1973-01-18 |
| SE376352B (en) | 1975-05-12 |
| ES393528A1 (en) | 1973-11-01 |
| JPS5550436B1 (en) | 1980-12-18 |
| ATA640271A (en) | 1976-04-15 |
| FR2099520A1 (en) | 1972-03-17 |
| DE2136736C3 (en) | 1973-11-15 |
| MY7500148A (en) | 1975-12-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PE20 | Patent expired after termination of 20 years |