JPH01167780U - - Google Patents
Info
- Publication number
- JPH01167780U JPH01167780U JP6344288U JP6344288U JPH01167780U JP H01167780 U JPH01167780 U JP H01167780U JP 6344288 U JP6344288 U JP 6344288U JP 6344288 U JP6344288 U JP 6344288U JP H01167780 U JPH01167780 U JP H01167780U
- Authority
- JP
- Japan
- Prior art keywords
- reference voltage
- video signal
- component
- signal
- amplifying
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
- Color Television Systems (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Analogue/Digital Conversion (AREA)
Description
第１図は本考案の第１実施例における回路構成
を示す図、第２図は本考案の第２実施例における
全体の回路構成を示すブロツク図、第３図は第２
図における要部の詳細を示すブロツク図、第４図
は従来における映像信号のレベルコントロール回
路の構成を示すブロツク図である。
１１……クロマ回路、１２，１２Ａ……Ａ／Ｄ
変換回路、１３……基準電圧作成回路、１４……
反転アンプ、１５……ローパスフイルタ、１６…
…エミツタフオロア回路、２１……ローパスフイ
ルタ、２２〜２４……増幅／レベルシフト回路。
FIG. 1 is a diagram showing the circuit configuration in the first embodiment of the present invention, FIG. 2 is a block diagram showing the entire circuit configuration in the second embodiment of the present invention, and FIG.
FIG. 4 is a block diagram showing the structure of a conventional video signal level control circuit. 11...Chroma circuit, 12, 12A...A/D
Conversion circuit, 13... Reference voltage creation circuit, 14...
Inverting amplifier, 15...Low pass filter, 16...
. . . emitter follower circuit, 21 . . . low pass filter, 22 to 24 . . . amplification/level shift circuit.
Claims (1)
検出する検出手段と、この手段により検出した直
流分を増幅して基準電圧を作成する基準電圧作成
手段と、この手段により作成された基準電圧に基
づいて上記映像信号をデジタルデータに変換する
Ａ／Ｄ変換回路とを具備したことを特徴とする映
像信号のレベルコントロール回路。 (2) カラー映像信号中のクランプ処理された輝
度信号の直流分を検出する検出手段と、この手段
により検出した直流分をそれぞれ増幅して赤、緑
、青のカラー信号別に基準電圧を作成する基準電
圧作成手段と、この手段により作成された各基準
電圧に基づいて上記カラー信号をそれぞれデジタ
ルデータに変換するＡ／Ｄ変換回路とを具備した
ことを特徴とする映像信号のレベルコントロール
回路。[Claims for Utility Model Registration] (1) A detection means for detecting a DC component of a luminance signal in an analog video signal, a reference voltage creation means for amplifying the DC component detected by this means to create a reference voltage, A level control circuit for a video signal, comprising: an A/D conversion circuit that converts the video signal into digital data based on the reference voltage created by this means. (2) A detection means for detecting the DC component of the clamped luminance signal in the color video signal, and amplifying the DC component detected by this means to create reference voltages for each red, green, and blue color signal. 1. A level control circuit for a video signal, comprising a reference voltage generating means and an A/D conversion circuit for converting each of the color signals into digital data based on each reference voltage generated by the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6344288U JPH01167780U (en) | 1988-05-13 | 1988-05-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6344288U JPH01167780U (en) | 1988-05-13 | 1988-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01167780U true JPH01167780U (en) | 1989-11-27 |
Family
ID=31288942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6344288U Pending JPH01167780U (en) | 1988-05-13 | 1988-05-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01167780U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03173274A (en) * | 1989-12-01 | 1991-07-26 | Matsushita Electric Ind Co Ltd | Video signal processing device |
-
1988
- 1988-05-13 JP JP6344288U patent/JPH01167780U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03173274A (en) * | 1989-12-01 | 1991-07-26 | Matsushita Electric Ind Co Ltd | Video signal processing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01167780U (en) | ||
| JPH01167781U (en) | ||
| JP2592818B2 (en) | Image reading device | |
| JPH0182581U (en) | ||
| JPH01137687U (en) | ||
| JPS61131187U (en) | ||
| JPH0338989U (en) | ||
| JPH0226162U (en) | ||
| JPS6271688U (en) | ||
| JPS6235394U (en) | ||
| JPS61137994U (en) | ||
| JPS63121988U (en) | ||
| JPS5873684U (en) | color signal amplifier | |
| JPS583665U (en) | RF envelope signal monitor circuit | |
| JPS6277929U (en) | ||
| JPS6197286U (en) | ||
| JPS6448989U (en) | ||
| JPS5826271U (en) | volume control circuit | |
| JPS6444760U (en) | ||
| JPH0392869U (en) | ||
| JPS58191731U (en) | Differential amplification analog-to-digital conversion circuit | |
| JPH01115331U (en) | ||
| JPS62198765U (en) | ||
| JPS62132587U (en) | ||
| JPS6344537U (en) |