JPS6415468U - - Google Patents
Info
- Publication number
- JPS6415468U JPS6415468U JP10874387U JP10874387U JPS6415468U JP S6415468 U JPS6415468 U JP S6415468U JP 10874387 U JP10874387 U JP 10874387U JP 10874387 U JP10874387 U JP 10874387U JP S6415468 U JPS6415468 U JP S6415468U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- average level
- component
- transmission
- level
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 230000001172 regenerating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
Landscapes
- Picture Signal Circuits (AREA)
- Television Receiver 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図及び第３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４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５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６図は第５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
７図はこの考案の他の実施例の構成を示す回路図
、第８図は第７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。
１１，１３，２１……端子、１４，２０……増
幅回路、１５……ＡＰＬ検出回路、１６……伸長
及び圧縮回路、１７……バツフア、１８……黒レ
ベルシフト回路、１９……黒レベル制御回路、２
３……圧縮回路。
FIG. 1 is a circuit diagram showing the configuration of an embodiment of this invention, FIGS. 2 and 3 are signal waveform diagrams shown to explain the operation of the circuit shown in FIG.
5 is a circuit diagram showing an example of a specific configuration of the circuit shown in FIG. 1, and FIG. 6 is a diagram showing the operation of the circuit shown in FIG. 5. FIG. 7 is a circuit diagram showing the configuration of another embodiment of the invention; FIG. 8 is a signal waveform diagram showing the operation of the circuit shown in FIG. 7. , FIG. 9 is a signal waveform diagram shown to explain the conventional problem. 11, 13, 21... terminal, 14, 20... amplifier circuit, 15... APL detection circuit, 16... expansion and compression circuit, 17... buffer, 18... black level shift circuit, 19... black level control circuit, 2
3...Compression 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
信号を伝送する映像信号伝送手段と、 上記直流再生手段によつて直流再生された映像
信号のペデスタルレベル近傍に於いて予め設定さ
れた利得切換え位置に従つて上記映像信号伝送手
段に於ける上記映像信号の伝送利得を切換える伝
送利得切換え手段と、 上記直流再生手段によつて直流分が再生された
映像信号の平均レベルを検出する平均レベル検出
手段と、 この平均レベル検出手段によつて検出された映
像信号の平均レベルが大きいとき、上記映像信号
伝送手段を通つた後の映像信号の黒レベルをシフ
トする黒レベルシフト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] DC reproducing means for regenerating the DC component of a video signal that does not include a DC component; video signal transmission means for transmitting the video signal regenerated by the DC reproducing means; Transmission gain switching means for switching the transmission gain of the video signal in the video signal transmission means according to a preset gain switching position near the pedestal level of the video signal DC-regenerated by the DC reproduction means; , an average level detection means for detecting the average level of the video signal whose DC component is reproduced by the DC reproduction means; and when the average level of the video signal detected by the average level detection means is large, the An image quality correction circuit comprising: black level shifting means for shifting the black level of a video signal after passing through the signal transmission means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10874387U JPS6415468U (en) | 1987-07-15 | 1987-07-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10874387U JPS6415468U (en) | 1987-07-15 | 1987-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6415468U true JPS6415468U (en) | 1989-01-26 |
Family
ID=31344364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10874387U Pending JPS6415468U (en) | 1987-07-15 | 1987-07-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6415468U (en) |
-
1987
- 1987-07-15 JP JP10874387U patent/JPS6415468U/ja active Pending
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