JPS56131280A - Digital color signal generating circuit - Google Patents
Digital color signal generating circuitInfo
- Publication number
- JPS56131280A JPS56131280A JP3499480A JP3499480A JPS56131280A JP S56131280 A JPS56131280 A JP S56131280A JP 3499480 A JP3499480 A JP 3499480A JP 3499480 A JP3499480 A JP 3499480A JP S56131280 A JPS56131280 A JP S56131280A
- Authority
- JP
- Japan
- Prior art keywords
- chroma
- signal
- converter
- roms
- levels
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
PURPOSE:To simplify the constitution of a signal generating circuit by digitizing the circuit by making the chroma signal of a digital color signal composed of a repetitive array of chroma levels at sampling points at constant intervals when a color video signal is sampled. CONSTITUTION:A chroma control signal from variable resistor VR1 for chroma control is converted by A/D converter (a) into a digital signal, and converter (a) selects a chroma signal and inputs respective bits to ROMs (b), (c) and (d). In ROMs (b), (c) and (d), chroma levels of the chroma signal arrayed in the order of hues are stored by sample hues, and according to the address of converter (a), the chroma level is outputted. The clock of a chrominance subcarrier from clock input terminal (e) is counted by counter (f) to discriminate a sampling point, and a change-over control signal is applied to switch (g) to apply chroma levels from ROMs (b), (c) and (d) to synthesizer (i). Then, a luminance signal digitized by A/D converter (h) and the chroma signal are mixed by synthesizier (i) and processed by blanking gate circuit (j) before being outputted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3499480A JPS56131280A (en) | 1980-03-18 | 1980-03-18 | Digital color signal generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3499480A JPS56131280A (en) | 1980-03-18 | 1980-03-18 | Digital color signal generating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56131280A true JPS56131280A (en) | 1981-10-14 |
Family
ID=12429686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3499480A Pending JPS56131280A (en) | 1980-03-18 | 1980-03-18 | Digital color signal generating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56131280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149231A2 (en) * | 1984-01-03 | 1985-07-24 | Honeywell Inc. | Inspection apparatus |
| JP2013156323A (en) * | 2012-01-27 | 2013-08-15 | Seiko Epson Corp | Display control device and electronic apparatus using the same |
-
1980
- 1980-03-18 JP JP3499480A patent/JPS56131280A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0149231A2 (en) * | 1984-01-03 | 1985-07-24 | Honeywell Inc. | Inspection apparatus |
| JP2013156323A (en) * | 2012-01-27 | 2013-08-15 | Seiko Epson Corp | Display control device and electronic apparatus using the same |
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