JPS6425270U - - Google Patents
Info
- Publication number
- JPS6425270U JPS6425270U JP11929587U JP11929587U JPS6425270U JP S6425270 U JPS6425270 U JP S6425270U JP 11929587 U JP11929587 U JP 11929587U JP 11929587 U JP11929587 U JP 11929587U JP S6425270 U JPS6425270 U JP S6425270U
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- mixing
- level
- predetermined
- value
- 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
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は本考案の構成を示すブロツク図、第２
図は本考案の作用を説明する図、第３図は従来例
を説明する図である。
１：映像信号、２：アナログスイツチ、３：パ
ルスジエネレータ、４：クリツプ回路、５：利得
制御型映像信号混合回路、６：アナログスイツチ
、７：ホールドコンデンサ、８：オペアンプ。
Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 is a block diagram showing the configuration of the present invention.
The figures are diagrams explaining the operation of the present invention, and FIG. 3 is a diagram explaining a conventional example. 1: video signal, 2: analog switch, 3: pulse generator, 4: clip circuit, 5: gain control type video signal mixing circuit, 6: analog switch, 7: hold capacitor, 8: operational amplifier.
Claims (1)
ることにより白圧縮を行なうテレビジヨンカメラ
装置において、映像信号のブランキング期間に、
該映像信号のピーク値に相当するレベルのパルス
を重畳する手段と、この映像信号と所定レベルで
クリツプした映像信号を所定の割合で混合する混
合比可変の映像信号混合手段と、この出力映像信
号のブランキング期間に相当する部分の信号レベ
ルが所定の基準電圧値と一致するようこの差電圧
を上記映像信号混合手段の混合比制御信号として
フイードバツクするフイードバツク手段とを有し
、常に映像信号のピーク値が上記所定の基準電圧
値に圧縮されることを特徴とするテレビジヨンカ
メラ装置の白圧縮回路。 In a television camera device that performs white compression by nonlinear processing of the video signal obtained from the image sensor, during the blanking period of the video signal,
means for superimposing a pulse at a level corresponding to the peak value of the video signal; video signal mixing means with a variable mixing ratio for mixing this video signal with a video signal clipped at a predetermined level at a predetermined ratio; and the output video signal. feedback means for feeding back this difference voltage as a mixing ratio control signal of the video signal mixing means so that the signal level of a portion corresponding to the blanking period of the video signal matches a predetermined reference voltage value, A white compression circuit for a television camera device, characterized in that a value is compressed to the predetermined reference voltage value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11929587U JPH0617365Y2 (en) | 1987-08-05 | 1987-08-05 | White compression circuit of television camera device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11929587U JPH0617365Y2 (en) | 1987-08-05 | 1987-08-05 | White compression circuit of television camera device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425270U true JPS6425270U (en) | 1989-02-13 |
| JPH0617365Y2 JPH0617365Y2 (en) | 1994-05-02 |
Family
ID=31364398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11929587U Expired - Lifetime JPH0617365Y2 (en) | 1987-08-05 | 1987-08-05 | White compression circuit of television camera device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617365Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04126469A (en) * | 1990-09-18 | 1992-04-27 | Ikegami Tsushinki Co Ltd | Video signal compression circuit |
-
1987
- 1987-08-05 JP JP11929587U patent/JPH0617365Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04126469A (en) * | 1990-09-18 | 1992-04-27 | Ikegami Tsushinki Co Ltd | Video signal compression circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617365Y2 (en) | 1994-05-02 |