JPH02142282A - Video signal processor - Google Patents

Video signal processor

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Publication number
JPH02142282A
JPH02142282A JP63294576A JP29457688A JPH02142282A JP H02142282 A JPH02142282 A JP H02142282A JP 63294576 A JP63294576 A JP 63294576A JP 29457688 A JP29457688 A JP 29457688A JP H02142282 A JPH02142282 A JP H02142282A
Authority
JP
Japan
Prior art keywords
signal
circuit
dtl
video signal
noise
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
Application number
JP63294576A
Other languages
Japanese (ja)
Inventor
Yukio Ono
幸雄 小野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP63294576A priority Critical patent/JPH02142282A/en
Publication of JPH02142282A publication Critical patent/JPH02142282A/en
Pending legal-status Critical Current

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  • Picture Signal Circuits (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To improve S/N without constituting a large scale circuit by utilizing a 1H.DL signal or a 1H.DL signal and a 2H.DL signal required to generate a contour signal (DTL signal) in the vertical (V) direction so as to form a comb-line filter. CONSTITUTION:1H delay (1H.DL) circuits 1, 5, a V.DTL generating circuit 6, an H.DTL generating circuit 9 and a DTL adder circuit 10 constitute a DTL signal generating circuit. Then a difference signal between a video signal (1H.DL signal) retarded by one horizontal scanning period and a video signal (OH.DL signal) not delayed and a vertical contour signal are added, Noise generated near a base line (0 level) of a correction signal is suppressed by a noise suppress circuit to form a correction signal with less noise and the signal is added to a main signal whose S/N is improved by comb-line filter. Thus, a false signal generated in the noncorrelation part of a picture contour is corrected to improve the S/N.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はテレビジョンカメラ装置のS/Nを改善する映
像信号処理装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal processing device for improving the S/N of a television camera device.

〔従来の技術〕[Conventional technology]

くし形フィルタを用いることにより、S/Nが改善され
ることは、従来よりよく知られたことである。一方、テ
レビカメラにおいては垂直(ロ)方向の輪郭信号(DT
L信号)を作るため、IH(水平走査期間)または2H
遅延させた信号を必要とする03管式カラーテレビカメ
ラの場合は通常緑チャンネル(以下G ch )でこれ
らの信号をつくり、赤■、緑C)、青Q3)Chの信号
に混合するいわゆるアウトオブグリーン方式が主流とな
っている。
It is well known that the S/N can be improved by using a comb filter. On the other hand, in a television camera, the vertical (b) direction contour signal (DT
IH (horizontal scanning period) or 2H
In the case of a 03-tube color television camera that requires delayed signals, these signals are usually created on the green channel (hereinafter referred to as Gch) and mixed with the signals of Red ■, Green C), and Blue Q3) Ch. The off-green method is the mainstream.

このようなカメラにおいてGchのS/Nを改善するこ
とは、カメラの総合S/Nを改善する上で非常に重要な
要素である。
Improving the S/N of Gch in such a camera is a very important element in improving the overall S/N of the camera.

前述したように、垂直輪郭信号(V−DTL)発生回路
を有するテレビカメラは1H・DL倍信号1水平走査期
間遅延信号)、2H−DL倍信号容易に得られるため、
この信号とOH・DL倍信号無遅延信号)とを加算する
ことによりくし形フィルタを構成できる。しかし、この
くし形フィルタによりS/N改善された信号は9画像輪
郭部の上下IHまたは2H相当分に無相関部分が発生し
As mentioned above, a television camera having a vertical contour signal (V-DTL) generation circuit can easily obtain a 1H-DL multiplied signal (1 horizontal scanning period delayed signal) and a 2H-DL multiplied signal.
A comb filter can be constructed by adding this signal and the OH/DL multiplied signal (non-delayed signal). However, in the signal whose S/N has been improved by this comb filter, uncorrelated portions occur in the upper and lower IH or 2H portions of the 9 image contours.

3管式の場合R,G、 B信号をマトリックスしエンコ
ーダ信号とした場合、この部分かにせ信号となってあら
れれ、無彩色の被写体を撮像したときなどはグリーン又
はマゼンタの色となってあられれる。このためG Ch
の信号にくし形フィルタ構成によるS/N改善を適用す
ることができなかった。(S/Nは改善されるが、にせ
信号が発生するため)0 〔発明が解決しようとする問題点〕 本発明は、これらの欠点を解決するため、<シ形フィル
タ機能の適用により画像輪郭部の上下IHまたは2H相
当分の無相関部分に発生するにせ信号を比較的簡単な構
成で除去することを目的とし、にせ信号を抑圧し、S/
Nの向上を図ろうとしたものである。
In the case of a three-tube type, if the R, G, and B signals are matrixed and used as an encoder signal, this part may become a fake signal, and when an achromatic subject is imaged, it may become a green or magenta color. It will be done. For this reason, G Ch
It was not possible to apply S/N improvement using a comb filter configuration to this signal. (Although the S/N is improved, a false signal is generated.) 0 [Problems to be solved by the invention] In order to solve these drawbacks, the present invention aims to improve the image contour by applying a square filter function. The purpose is to remove, with a relatively simple configuration, the false signals that occur in the uncorrelated parts corresponding to the upper and lower IH or 2H of the S/
This is an attempt to improve N.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、上記の目的を達成するため、OH・DL倍信
号1H・DL倍信号差信号を作り、この差信号なV−D
TL信号と混合して補正用の信号を作り、あるいはOH
・DL倍信号1H・DL倍信号2H−DL倍信号演算に
より補正用の信号を作り、この補正用の信号のベースラ
イン(0レベル)付近に発生するノイズをノイズサプレ
ス回路によって抑圧し、ノイズの少ない補正信号を作り
In order to achieve the above object, the present invention creates an OH/DL multiplied signal 1H/DL multiplied signal difference signal, and uses this difference signal as a V-D
Mix it with the TL signal to create a correction signal, or use the OH
・DL double signal 1H・DL double signal 2H− A correction signal is created by DL double signal calculation, and the noise generated near the baseline (0 level) of this correction signal is suppressed by a noise suppressor circuit. Create less correction signal.

この信号をくし形フィルタ構成によりS/N改善された
本線信号に加算することにより2画像輪郭部の無相関部
分に発生するにせ信号を補正し、くし形フィルタ構成に
よるS/N改嵜効果を絶大ならしめようとしたものであ
る。
By adding this signal to the main signal whose S/N has been improved by the comb filter configuration, false signals generated in the uncorrelated parts of the contours of the two images are corrected, and the S/N improvement effect due to the comb filter configuration is corrected. It was an attempt to make it look great.

〔作用〕[Effect]

本発明の動作は下記のようである。 The operation of the present invention is as follows.

まず、所定映像信号のOH・DL倍信号IH・DL倍信
号あるいはOH・DL倍信号LH−DL倍信号2H−D
L倍信号等価加算し、くシ形フィルタ構成によるS/N
改善された信号を得る。次に。
First, OH/DL times signal IH/DL times signal or OH/DL times signal LH-DL times signal 2H-D of a predetermined video signal.
S/N by adding L times signal equivalently and using comb filter configuration
Get an improved signal. next.

この加算によって画像輪郭部の上下各IHまたは2H相
当分の無相関部分に発生するにせ信号を除去するため、
OH・DL倍信号1H・DL倍信号差信号を作り、この
差信号をV−DTL信号と混合して補正用の信号を作り
、あるいはOH・DL倍信号1H・DL倍信号2H−D
L倍信号演算により補正用の信号を作り、この補正用の
信号をノイズサプレスし、ベースライン付近のノイズを
除去後。
By this addition, in order to remove false signals generated in uncorrelated parts corresponding to each IH or 2H above and below the image contour,
Create an OH/DL double signal 1H/DL double signal difference signal, and mix this difference signal with the V-DTL signal to create a correction signal, or OH/DL double signal 1H/DL double signal 2H-D
A correction signal is created by L-fold signal calculation, noise is suppressed on this correction signal, and noise near the baseline is removed.

S/N改善された本線信号に加算する。Add to the main line signal with improved S/N.

〔実施例〕〔Example〕

以下、この発明を一実施例によって説明する。 This invention will be explained below by way of an example.

第1図に本発明のブロック図、第2図に動作説明のため
の各部波形図を示す。図において、1はIH遅延(1H
・DL)回路、2は加算回路、3はDL回路、4は加算
回路、5は1H・DL回路。
FIG. 1 is a block diagram of the present invention, and FIG. 2 is a waveform diagram of each part for explaining the operation. In the figure, 1 is IH delay (1H
・DL) circuit, 2 is an adder circuit, 3 is a DL circuit, 4 is an adder circuit, 5 is a 1H/DL circuit.

6はV−DTL発生回路、7は補正信号発生回路。6 is a V-DTL generation circuit, and 7 is a correction signal generation circuit.

8はH−DTL信号用くし形フィルタ構成の加算回路、
9はH−DTL発生回路、10はDTL  加算回路、
11はノイズサプレス回路、12は レベルテペンデン
ト回路、13は増幅器を示し2回路1、5.6.9.1
0で通常のDTL信号発生回路を構成している。つまり
、DTL信号発生回路を有するカラーカメラにおいては
、特別に回路を設けることなく、1H・DL倍信号得ら
れるだめ。
8 is an adder circuit having a comb filter configuration for H-DTL signals;
9 is an H-DTL generation circuit, 10 is a DTL addition circuit,
11 is a noise suppressor circuit, 12 is a level stepping circuit, 13 is an amplifier, 2 circuits 1, 5.6.9.1
0 constitutes a normal DTL signal generation circuit. In other words, in a color camera having a DTL signal generation circuit, a 1H/DL signal can be obtained without providing a special circuit.

これを用いてくし形フィルタを容易に構成できる。Using this, a comb filter can be easily constructed.

以下、この動作について説明する。入力映像信号(OH
・DL倍信号aと1H・DL回路1を通った1H・DL
倍信号b)とが加算回路2において等価(1H・DL倍
信号なる加算により、くシ形フィルタ構成によりS/N
改善された本線信号Cとなる。
This operation will be explained below. Input video signal (OH
・DL double signal a and 1H・DL that passed through 1H・DL circuit 1
The double signal b) is equalized in the adder circuit 2 (by addition of the 1H/DL double signal, the S/N is
This results in an improved main line signal C.

しかしながら、この本線信号Cは9画像輪郭部の(第2
図の斜線部分)が発生し、この部分がカラーエンコーダ
出力で偽信号となってあられれる。
However, this main line signal C is the (second
(shaded area in the figure) occurs, and this area appears as a false signal in the color encoder output.

また、垂直方向の輪郭を強調するため1通常V・DTL
信号eが本線信号Cに加算されるが、そのV−DTL信
号eは2図示のように対称のレベルをもった補正信号で
あるため、この信号の加算によって無相関部分が変に補
正を受けてしまう。そこで、補正信号発生回路7によっ
て、1H・DL倍信号−OH−DL信信号外る演算を行
い、補正信号fを得る。この補正信号fには、ベースラ
イン付近にノイズがあるため、このまま加算回路4にて
本線信号Cに加算すると、S/N改善の効果がなくなる
。このため、まずDTL加算回路10にてV−DTL信
号eと補正信号fを加算し、補正V・DTL信号gを得
る。その後、ノイズサプレス回路11によって信号gの
ベースライン付近のノイズを抑圧し、ノイズ抑圧補正V
−DTL信号りを得たのち、レベルデイペンデント回路
12.増幅器13を介して加算回路4にて加算する。こ
うすることにより、ノイズが抑圧され無相関部分のない
輪郭補正された信号Jを得ることができる。
In addition, 1 normal V・DTL is used to emphasize the vertical contour.
Signal e is added to main line signal C, but since the V-DTL signal e is a correction signal with symmetrical levels as shown in Figure 2, the uncorrelated part is strangely corrected by the addition of this signal. It ends up. Therefore, the correction signal generation circuit 7 performs an operation to remove the 1H/DL multiplied signal -OH-DL signal to obtain the correction signal f. Since this correction signal f has noise near the baseline, if it is added to the main signal C by the adding circuit 4 as it is, the S/N improvement effect will be lost. For this reason, first, the V-DTL signal e and the correction signal f are added in the DTL adding circuit 10 to obtain the corrected V-DTL signal g. Thereafter, the noise in the vicinity of the baseline of the signal g is suppressed by the noise suppressor circuit 11, and the noise suppression correction V
- After obtaining the DTL signal, the level dependent circuit 12. The signals are added by an adder circuit 4 via an amplifier 13. By doing so, it is possible to obtain a contour-corrected signal J in which noise is suppressed and there is no uncorrelated portion.

すなわち、無相関部分が補正されるとともに。In other words, the uncorrelated portion is corrected.

輪郭補正された信号を得ることができ、くシ形フィルタ
になるS/N改善の効果を有効に利用することができる
A contour-corrected signal can be obtained, and the S/N improvement effect of the comb filter can be effectively utilized.

次に、この発明の他の実施例を第3図、第4図によって
説明する。
Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4.

図において、  21.22.は1H・DL回路、23
はOH・DL倍信号と2H−DL信信号上加算する加算
回路、24はこの加算信号りと1H・DL信信号−の加
算回路、25.26は、補正信号発生用の演算回路、2
7はノイズサプレス回路、2Bは増幅器、29は補正信
号Gの加算回路、30は輪郭信号発生回路を示す。
In the figure, 21.22. is 1H/DL circuit, 23
2 is an addition circuit for adding the OH/DL multiplied signal and the 2H-DL signal; 24 is an addition circuit for this addition signal and the 1H/DL signal; 25.26 is an arithmetic circuit for generating a correction signal;
7 is a noise suppressor circuit, 2B is an amplifier, 29 is an addition circuit for correction signal G, and 30 is a contour signal generation circuit.

図において9回路21,22.30で2通常使用されて
いるV−DTL信号発生回路を構成する。
In the figure, nine circuits 21, 22, and 30 constitute two commonly used V-DTL signal generation circuits.

本システムにおいて、くシ形フィルタは以下のようにし
て構成される。まず、1H・DLL路21でOH・DL
倍信号がIH遅延され、1H・DL信信号−なる。さら
に、この信号Bは1H・DLL路22で2H遅延した2
H−DL信信号上なる。
In this system, the comb filter is configured as follows. First, OH/DL at 1H/DLL path 21
The double signal is delayed by IH and becomes a 1H/DL signal. Furthermore, this signal B is delayed by 2H in the 1H/DLL path 22.
The H-DL transmission signal is on.

この2H−DL信信号上OH・DL倍信号と、加算信号
りとなる。次に、この信号りは、1H・DL信信号−加
算回路24で等価加算される。すなわ善された本線信号
Eとなる。しかしながら、この本線信号Eは1画像輪郭
部の上下2H相当分に。
This 2H-DL signal is added to the OH/DL multiplied signal and an addition signal. Next, these signals are equivalently added in a 1H/DL signal adder circuit 24. In other words, it becomes the improved main line signal E. However, this main line signal E corresponds to 2H above and below the contour of one image.

レベルが一致しない無相関部分が発生し、この部分がカ
ラーエンコーダ出力でにせ信号となりであられれる。す
なわち無彩色の被写体を撮像したときなどグリーンまた
はマゼ/りの色がついてしまうことになる。そこで、こ
れらのにせ信号を除去するため、演算回路25.26に
よって、1H・DL信信号−加算信号りなる演算を行な
い補正信号Fを作る。この補正信号Fには9図で示すよ
うにベースライン付近にノイズがあるため、これをノイ
ズサプレス回路27により除去し、ノイズのない補正信
号Gを得る。この補正信号Gを増幅器28で増幅したの
ち、加算回路29で本線信号Eと混合することにより、
ノイズが抑圧され、無相関部分のない信号Hを得ること
ができる。
An uncorrelated part whose levels do not match is generated, and this part becomes a false signal at the color encoder output. In other words, when an achromatic subject is imaged, a green or maze/red color will appear. Therefore, in order to remove these false signals, the arithmetic circuits 25 and 26 perform an arithmetic operation on the 1H/DL signal minus the addition signal to generate a correction signal F. Since this correction signal F has noise near the baseline as shown in FIG. 9, this is removed by the noise suppressor circuit 27 to obtain a noise-free correction signal G. This correction signal G is amplified by the amplifier 28 and then mixed with the main signal E by the adder circuit 29.
Noise is suppressed and a signal H without uncorrelated parts can be obtained.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、V、DTL信号を発生するために必要
な1H・DL倍信号るいは1H・DL倍信号2H−DL
倍信号利用してにせ信号の発生しない。
According to the present invention, the 1H/DL times signal or the 1H/DL times signal 2H-DL required to generate the V, DTL signal.
No false signals are generated by using double signals.

くし形フィルタを構成することができ、大規模な回路を
構成するこさなく、カメラのS/Nを向上することがで
きる。
A comb filter can be configured, and the S/N of the camera can be improved without configuring a large-scale circuit.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例の構成を示すブロック図、第
2図はその動作説明のための各部波形図。 第3図は他の実施例の構成を示すブロック図、第4図は
その動作説明のだめの模式図および各部波形図である。 1、5.21.22 : 1H・DL回路、 7:補正
信号発生回路、25.26:演算回路、11.27:ノ
イズサブレス回路、4,29:加算回路。 第3図 μm− 第20 ヒー79454   i ■40 1−+sJ 本愛亀1言号
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a waveform diagram of each part for explaining its operation. FIG. 3 is a block diagram showing the configuration of another embodiment, and FIG. 4 is a schematic diagram for explaining its operation and waveform diagrams of various parts. 1, 5.21.22: 1H/DL circuit, 7: Correction signal generation circuit, 25.26: Arithmetic circuit, 11.27: Noise subless circuit, 4, 29: Adder circuit. Figure 3 μm- 20 He 79454 i ■40 1-+sJ Honai turtle 1 word

Claims (1)

【特許請求の範囲】 1、垂直輪郭信号発生回路を内蔵するテレビジョンカメ
ラにおいて、一水平走査期間遅延した映像信号(以下1
H・DL信号と称す)と遅延しない映像信号(以下OH
・DL信号と称す)とを加算することによってS/N改
善を行なう映像信号処理装置を有し、上記1H・DL信
号とOH・DL信号の差信号と上記垂直輪郭信号とを加
算演算し、ベースライン(0レベル)付近の小振幅成分
(ノイズ成分)を抑圧した信号によって、上記S/N改
善された映像信号のにせ信号を除去することを特徴とす
る映像信号処理装置。 2、1H・DL信号と2H・DL信号およびOH・DL
信号とを加算することによってS/N改善を行なう映像
信号処理装置において、上記1H・DL信号と2H・D
L信号およびOH・DL信号の差信号のベースライン付
近のノイズ成分を抑圧した信号によって、上記S/N改
善された映像信号のにせ信号を除去することを特徴とす
る映像信号処理装置。
[Claims] 1. In a television camera incorporating a vertical contour signal generation circuit, a video signal delayed by one horizontal scanning period (hereinafter referred to as 1)
(hereinafter referred to as H/DL signal) and non-delayed video signal (hereinafter referred to as OH
- A video signal processing device that improves the S/N by adding the 1H/DL signal and the OH/DL signal and the vertical contour signal; A video signal processing device characterized in that a false signal of the S/N improved video signal is removed by a signal in which a small amplitude component (noise component) near a baseline (0 level) is suppressed. 2. 1H/DL signal, 2H/DL signal and OH/DL
In a video signal processing device that improves the S/N by adding the 1H/DL signal and the 2H/D signal,
A video signal processing device characterized in that a false signal of the S/N-improved video signal is removed by a signal in which a noise component near a baseline of a difference signal between an L signal and an OH/DL signal is suppressed.
JP63294576A 1988-11-24 1988-11-24 Video signal processor Pending JPH02142282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63294576A JPH02142282A (en) 1988-11-24 1988-11-24 Video signal processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63294576A JPH02142282A (en) 1988-11-24 1988-11-24 Video signal processor

Publications (1)

Publication Number Publication Date
JPH02142282A true JPH02142282A (en) 1990-05-31

Family

ID=17809567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63294576A Pending JPH02142282A (en) 1988-11-24 1988-11-24 Video signal processor

Country Status (1)

Country Link
JP (1) JPH02142282A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689173A (en) * 1979-12-20 1981-07-20 Sony Corp Vertical aperture correcting circuit
JPS59186474A (en) * 1983-04-07 1984-10-23 Victor Co Of Japan Ltd Video signal processing circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5689173A (en) * 1979-12-20 1981-07-20 Sony Corp Vertical aperture correcting circuit
JPS59186474A (en) * 1983-04-07 1984-10-23 Victor Co Of Japan Ltd Video signal processing circuit

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