JPS6415469U - - Google Patents
Info
- Publication number
- JPS6415469U JPS6415469U JP10874487U JP10874487U JPS6415469U JP S6415469 U JPS6415469 U JP S6415469U JP 10874487 U JP10874487 U JP 10874487U JP 10874487 U JP10874487 U JP 10874487U JP S6415469 U JPS6415469 U JP S6415469U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- video signal
- component
- reproducing
- blanking period
- 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
- 238000010586 diagram Methods 0.000 description 11
- 230000003321 amplification Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図はこの考案の一実施例の構成を示す回路
図、第２図は第１図に示す回路の動作を説明する
ために示す信号波形図、第３図は第１図に示す回
路の効果を説明するために示す信号波形図、第４
図は第１図に示す回路の具体的構成の一例を示す
回路図、第５図は第４図に示す回路の動作を説明
するための等価回路を示す回路図、第６図はこの
考案の他の実施例の構成を示す回路図、第７図は
第６図に示す回路の具体的構成の一例を示す回路
図、第８図は第６図に示す回路の動作を説明する
ために示す信号波形図、第９図は従来の問題を説
明するために示す信号波形図である。
１１，１３，１９，２１，２４……端子、１４
，２３……増幅回路、１５……黒側伸長回路、１
６……バツフア、１８……伸長処理禁止回路、２
０……ＡＰＬ検出回路、２１……黒レベル制御回
路、２２……黒レベルシフト回路。
Fig. 1 is a circuit diagram showing the configuration of an embodiment of this invention, Fig. 2 is a signal waveform diagram shown to explain the operation of the circuit shown in Fig. 1, and Fig. 3 is a circuit diagram of the circuit shown in Fig. 1. Signal waveform diagram shown to explain the effect, No. 4
The figure is a circuit diagram showing an example of the specific configuration of the circuit shown in Fig. 1, Fig. 5 is a circuit diagram showing an equivalent circuit for explaining the operation of the circuit shown in Fig. 4, and Fig. 6 is a circuit diagram showing an example of the specific configuration of the circuit shown in Fig. 4. A circuit diagram showing the configuration of another embodiment; FIG. 7 is a circuit diagram showing an example of a specific configuration of the circuit shown in FIG. 6; FIG. 8 is shown to explain the operation of the circuit shown in FIG. 6. Signal Waveform Diagram FIG. 9 is a signal waveform diagram shown to explain the conventional problem. 11, 13, 19, 21, 24...Terminal, 14
, 23...Amplification circuit, 15...Black side extension circuit, 1
6... Buffer, 18... Decompression processing inhibition circuit, 2
0...APL detection circuit, 21...Black level control circuit, 22...Black level shift circuit.
Claims (1)
する直流再生手段と、 この直流再生手段によつて直流再生された映像
信号に於いて予め設定されたレベルより黒側の部
分を伸長処理する黒側伸長手段と、 上記映像信号の水平ブランキング期間及び垂直
ブランキング期間に、上記黒側伸長手段の伸長処
理を禁止する伸長処理禁止手段とを具備したこと
を特徴とする画質補正回路。[Claims for Utility Model Registration] A DC reproducing means for reproducing the above-mentioned DC component of a video signal that does not include a DC component; The present invention is characterized by comprising a black side expansion means for expanding the side portion, and an expansion processing prohibiting means for prohibiting the expansion processing of the black side expansion means during a horizontal blanking period and a vertical blanking period of the video signal. Image quality correction circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10874487U JPS6415469U (en) | 1987-07-15 | 1987-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10874487U JPS6415469U (en) | 1987-07-15 | 1987-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415469U true JPS6415469U (en) | 1989-01-26 |
Family
ID=31344365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10874487U Pending JPS6415469U (en) | 1987-07-15 | 1987-07-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415469U (en) |
-
1987
- 1987-07-15 JP JP10874487U patent/JPS6415469U/ja active Pending
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