JPS57148476A - Picture signal processing circuit - Google Patents
Picture signal processing circuitInfo
- Publication number
- JPS57148476A JPS57148476A JP3442081A JP3442081A JPS57148476A JP S57148476 A JPS57148476 A JP S57148476A JP 3442081 A JP3442081 A JP 3442081A JP 3442081 A JP3442081 A JP 3442081A JP S57148476 A JPS57148476 A JP S57148476A
- Authority
- JP
- Japan
- Prior art keywords
- level
- signal
- supplied
- output
- terminal
- 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.)
- Granted
Links
Landscapes
- Picture Signal Circuits (AREA)
Abstract
PURPOSE: To perform a nonlinear level compressing processing on picture signals with an excellent frequency characteristic, by performing signal processings by setting the clip level, knee point, and slope on the picture signals.
CONSTITUTION: An input picture signal is supplied from a terminal 1 to a clamping circuit 3 through a preamplifier 2, and the DC level of a black level is clamped. The output has two gains which are equal to each other, and is supplied to slicing circuits 4 and 5 whose each slice level can be set to a variable condition. These circuits 4 and 5 slice the signal into SL1 and SL2 (SL1<SL2), respectively, and supply each output to a signal mixing circuit 8. In the circuit 8, signals SL1 and SL2 are supplied across both terminals 9a and 9b of a variable resistor 9, and an output in which the waveform is mixed at a mixing ratio corresponding to the resistance ratio between a variable terminal 9c and the terminals 9a and 9b, is outputted from a terminal 11. When a clip level, a knee point PN and a slope are given from a resistor 6 at this moment, a white clip point PW can be obtained at a resistor 7.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3442081A JPS57148476A (en) | 1981-03-10 | 1981-03-10 | Picture signal processing circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3442081A JPS57148476A (en) | 1981-03-10 | 1981-03-10 | Picture signal processing circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57148476A true JPS57148476A (en) | 1982-09-13 |
JPH0253991B2 JPH0253991B2 (en) | 1990-11-20 |
Family
ID=12413703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3442081A Granted JPS57148476A (en) | 1981-03-10 | 1981-03-10 | Picture signal processing circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57148476A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6130110A (en) * | 1984-07-20 | 1986-02-12 | Hitachi Ltd | Signal processing circuit |
JPS61195670U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS62157474A (en) * | 1985-12-28 | 1987-07-13 | Hitachi Ltd | Video signal processing circuit |
JPS6324763A (en) * | 1986-07-17 | 1988-02-02 | Matsushita Electric Ind Co Ltd | High luminance compressing circuit in color camera |
US5299000A (en) * | 1992-06-17 | 1994-03-29 | Zenith Electronics Corp. | Video white signal compression and peaking |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5278309A (en) * | 1975-12-24 | 1977-07-01 | Sony Corp | Tv receiver |
JPS5542445U (en) * | 1978-09-13 | 1980-03-19 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5542445B2 (en) * | 1973-12-20 | 1980-10-30 |
-
1981
- 1981-03-10 JP JP3442081A patent/JPS57148476A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5278309A (en) * | 1975-12-24 | 1977-07-01 | Sony Corp | Tv receiver |
JPS5542445U (en) * | 1978-09-13 | 1980-03-19 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6130110A (en) * | 1984-07-20 | 1986-02-12 | Hitachi Ltd | Signal processing circuit |
JPS61195670U (en) * | 1985-05-29 | 1986-12-05 | ||
JPS62157474A (en) * | 1985-12-28 | 1987-07-13 | Hitachi Ltd | Video signal processing circuit |
JPS6324763A (en) * | 1986-07-17 | 1988-02-02 | Matsushita Electric Ind Co Ltd | High luminance compressing circuit in color camera |
US5299000A (en) * | 1992-06-17 | 1994-03-29 | Zenith Electronics Corp. | Video white signal compression and peaking |
Also Published As
Publication number | Publication date |
---|---|
JPH0253991B2 (en) | 1990-11-20 |
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