JPS62136188A - Signal processing circuit - Google Patents

Signal processing circuit

Info

Publication number
JPS62136188A
JPS62136188A JP27710485A JP27710485A JPS62136188A JP S62136188 A JPS62136188 A JP S62136188A JP 27710485 A JP27710485 A JP 27710485A JP 27710485 A JP27710485 A JP 27710485A JP S62136188 A JPS62136188 A JP S62136188A
Authority
JP
Japan
Prior art keywords
circuit
output
signal
signals
signal processing
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
Application number
JP27710485A
Other languages
Japanese (ja)
Other versions
JPH0671338B2 (en
Inventor
Masahiro Honjo
本城　正博
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP27710485A priority Critical patent/JPH0671338B2/en
Priority to US06/854,746 priority patent/US4734758A/en
Priority to DE8686303153T priority patent/DE3684353D1/en
Priority to EP86303153A priority patent/EP0199602B1/en
Publication of JPS62136188A publication Critical patent/JPS62136188A/en
Publication of JPH0671338B2 publication Critical patent/JPH0671338B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE:To surely detect the presence/absence of vertical correlation in chrominance components, by comparing amplitude levels with each other with a comparator circuit after changing once changed in vertical direction of amplitudes and phases of input chrominance components to changes in amplitude direction by means of a transducer and calculating the output of the comparator circuit at an arithmetic circuit. CONSTITUTION:Signals inputted from an input terminal 1 are supplied to a transducer 3 which is composed of an 1-H delay circuit 4 and synthesizer 5 and where phase changes in vertical direction of chrominance components are changed to amplitude changed through a band-pass filter 2. For example, chrominance components (b) are obtained from input signals (a) after passing through a comb line filter 3 which is a transducer and, when the chrominance components (b) are detected by detectors 8 and 9, signals (c) and (d) are obtained. By taking the OR of signals (e) and (f) with a compartor 10, signals (g) are outputted and sent to an arithmetic circuit 12. The signals (g) become signals (h) after they are delayed by 1-H at a delay circuit 11 and sent to the arithmetic circuit 12. Then the signals (g) and (h) are operated at the arithmetic circuit 12 and signals (i) are outputted. It is known that the signals (i) show a period (z) during which no vertical correlation exists in color.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、ＶＴＲ等に用いられる映像信号処理回路に関
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 circuit used in a VTR or the like.

従来の技術 近年、映像信号を扱う信号処理回路において、くし形フ
ィルタが数多く用いられるようになってきた。2. Description of the Related Art In recent years, many comb filters have come into use in signal processing circuits that handle video signals.

例えばＮＴＳＣ信号の場合、色信号（Ｃ信号と略称する
）が１水平周期（ＩＨと略称する）ごとにインターリー
ブする周波数に設定されているため、入力信号とＩＨ遅
延した入力信号を加算するＹ形くし形フィルタにより輝
度信号（Ｙ信号と略称する）が分離され、入力信号から
Ｉ　Ｈ遅延した信号を減算するＣ形くし形フィルタによ
り色信号が分離される。つまりＹ／Ｃ分離回路にくし形
フィルタが多く使われている。また、ＶＴＲの色Ｓ／Ｎ
改善回路においても、Ｃ形くし形フィルタが使用されて
いる。For example, in the case of an NTSC signal, the color signal (abbreviated as C signal) is set to a frequency that is interleaved every horizontal period (abbreviated as IH), so the Y-shaped signal that adds the input signal and the input signal delayed by IH is used. A comb-shaped filter separates a luminance signal (abbreviated as a Y signal), and a C-shaped comb filter subtracts an IH-delayed signal from an input signal to separate a chrominance signal. In other words, comb filters are often used in Y/C separation circuits. Also, the color S/N of the VTR
A C-comb filter is also used in the improved circuit.

しかし、これらくし形フィルタは、色信号の垂直相関が
強いことを前提としており、垂直相関の弱い期間はＹ／
Ｃ分離が正常に行なわれず、色だれ、ドツト妨害等の悪
影響が発生していた。そこで、従来色の垂直相関の有無
を検出する手段として種々の方法が提案されている。第
１の方法として、Ｙ信号とＣ信号の相関が強いことを利
用して、Ｙ信号の垂直相関を検出し利用するものである
が、これはＹ信号とＣ信号の相関がない信号では誤動作
する。However, these comb filters assume that the vertical correlation of color signals is strong, and the period of weak vertical correlation is Y/
C separation was not performed normally, causing adverse effects such as color bleeding and dot interference. Therefore, various methods have been proposed as means for detecting the presence or absence of vertical correlation between conventional colors. The first method is to detect and utilize the vertical correlation of the Y signal by taking advantage of the strong correlation between the Y signal and the C signal, but this method will malfunction if there is no correlation between the Y signal and the C signal. do.

第２の方法として、色信号周波数成分の信号レヘルをＩ
　Ｈ前の信号レベルと比較し相関を検出する方法が、本
発明者により特願昭５９−１６８２５１号において提案
されている。この方法によると、色の垂直方向の飽和度
の変化により垂直相関の有無が検出されることになる。As a second method, the signal level of the color signal frequency component is
A method of detecting correlation by comparing the signal level before H is proposed by the present inventor in Japanese Patent Application No. 168251/1982. According to this method, the presence or absence of vertical correlation is detected based on a change in the saturation level of colors in the vertical direction.

この従来例の簡単なブロック図を第５図に示す。A simple block diagram of this conventional example is shown in FIG.

ｌＨ以前との色信号の振幅方向を比較するために、遅延
回路２１、検波器２２．２３、比較回路２４により構成
されている。この構成によると、第６図ａの如き色信号
が入力された場合、色信号の垂直相関のない期間を検出
し、ｄに示す如き信号が出力されることになる。ここで
す、ｃはそれぞれ各部の波形を示している。In order to compare the amplitude direction of the color signal with that before IH, it is composed of a delay circuit 21, detectors 22 and 23, and a comparison circuit 24. According to this configuration, when a color signal as shown in FIG. 6a is input, a period in which the color signal has no vertical correlation is detected, and a signal as shown in d is output. Here, c indicates the waveform of each part.

しかし、Ｃに示す如き位相のみ異なる信号が入力された
場合、出力信号はｄとなり、色の垂直相関の有無は検出
されないという欠点が生じる。However, when signals having different phases as shown in C are input, the output signal becomes d, and there is a drawback that the presence or absence of vertical correlation of colors is not detected.

発明が解決しようとする問題点 上記のような構成では、Ｃ（８号とＹ信号の相関がなく
、かっ色信号の垂直方向の振幅変化がなく色相変化のみ
有する信号に関しては色信号の垂直相関がないことを検
出することはできず、つまりその信号では、くし形フィ
ルタにより色だれ、ドツト妨害が発生することはさけら
れなかった。Problems to be Solved by the Invention In the above configuration, there is no correlation between the C(8) and the Y signal, and the vertical correlation of the color signal is negative for the signal that has only a hue change and no vertical amplitude change of the brown signal. In other words, the comb filter inevitably causes color blur and dot interference in that signal.

本発明は、上記問題点に鑑み、色信号の振幅レベルと位
相の垂直相関を比較することにより、確実に色の垂直相
関の有無を検出する信号処理回路である。In view of the above problems, the present invention is a signal processing circuit that reliably detects the presence or absence of vertical color correlation by comparing the vertical correlation between the amplitude level and phase of color signals.

問題点を解決するための手段 上記問題点を解決するために、本発明の信号処理回路は
、入力色信号の振幅及び位相の垂直方向の変化を共に振
幅方向の変化に変換して出力する変換器と、前記変換器
の出力を所定時間遅延する第１の遅延回路と、前記変換
器の出力の振幅レベルと前記第１の遅延回路の出力の振
幅レベルを比較する比較回路と、前記比較回路の出力を
所定時間遅延する第２の遅延回路と、前記第１の比較回
路の出力と前記第２の遅延回路の出力とを演算する演算
回路を備え、入力色信号の振幅及び位相の垂直相関を検
出するように構成したものである。Means for Solving the Problems In order to solve the above problems, the signal processing circuit of the present invention converts both vertical changes in the amplitude and phase of an input color signal into changes in the amplitude direction and outputs the changes. a first delay circuit that delays the output of the converter for a predetermined time; a comparison circuit that compares the amplitude level of the output of the converter with the amplitude level of the output of the first delay circuit; and the comparison circuit. a second delay circuit that delays the output of the input color signal for a predetermined period of time, and an arithmetic circuit that calculates the output of the first comparator circuit and the output of the second delay circuit; It is configured to detect.

作用 本発明は上記した構成により色信号の振幅レベル並び位
相の垂直方向の変化を検出することが可能となり、確実
に色信号の垂直相関の有無を検出することができる。Effect of the Invention With the above-described configuration, the present invention can detect vertical changes in the amplitude level and phase of color signals, and can reliably detect the presence or absence of vertical correlation in color signals.

実施例 以下本発明の一実施例の信号処理回路について、図面を
参照しながら説明する。Embodiment Below, a signal processing circuit according to an embodiment of the present invention will be described with reference to the drawings.

第１図は、本発明の第１の実施例におけるブロック図で
ある。入力端子１より入力した信号はバンドパスフィル
タ２を通り、Ｌ　Ｈ遅延回路４と、合成器５から構成さ
れる変換器３にて色信号の垂直方向の位相変化を振幅変
化に変換される。その色信号は遅延回路６と比較回路７
に送られ、遅延回路６の出力は比較回路７へ送られる。FIG. 1 is a block diagram of a first embodiment of the present invention. A signal inputted from an input terminal 1 passes through a bandpass filter 2, and a converter 3 consisting of an LH delay circuit 4 and a synthesizer 5 converts the vertical phase change of the color signal into an amplitude change. The color signal is transmitted to the delay circuit 6 and the comparison circuit 7.
The output of the delay circuit 6 is sent to the comparison circuit 7.

比較回路７では、検波器８．９により入力信号を検波し
、それぞれの検波出力を比較器１０にて比較し、レベル
差が大なる時は例えばＨｉｇｈレベルの信号を演算回路
１２に出力すると同時に遅延回路１１へ送る。In the comparator circuit 7, the input signal is detected by the detector 8.9, and the respective detection outputs are compared by the comparator 10. When the level difference is large, for example, a high level signal is output to the arithmetic circuit 12, and at the same time The signal is sent to the delay circuit 11.

遅延回路１１の出力は演算回路１２へ送られる。演算回
路１２は、例えばインハ′−クー回路１３とアンド回路
１４より構成され、比較回路７の出力が１であり、かつ
遅延回路１１の出力が０である時のみに、１を出力する
ように演算を行う。この極性は、後段の回路構成により
逆であってももちろんかまわない。The output of the delay circuit 11 is sent to the arithmetic circuit 12. The arithmetic circuit 12 is composed of, for example, an input circuit 13 and an AND circuit 14, and outputs 1 only when the output of the comparator circuit 7 is 1 and the output of the delay circuit 11 is 0. Perform calculations. Of course, this polarity may be reversed depending on the circuit configuration of the subsequent stage.

ここで比較器１０の一例を第２図に示す。Here, an example of the comparator 10 is shown in FIG.

検波器８の出力は、コンパレータ１６の一人力とコンパ
レータ１７の十人力に接続され、検波器９の出力はコン
パレータ１６の十人力とコンパレータ１７の一人力に接
続され、コンパレータの出力はダイオード１８．１９で
ハイレベルをＯＲされ出力される。The output of the detector 8 is connected to the power of the comparator 16 and the power of the comparator 17, the output of the detector 9 is connected to the power of the comparator 16 and the power of the comparator 17, and the output of the comparator is connected to the power of the comparator 16 and the power of the comparator 17. At 19, the high level is ORed and output.

このように構成された本発明について、第３図の波形図
を用いて各部の動作を説明する。Regarding the present invention configured in this way, the operation of each part will be explained using the waveform diagram of FIG. 3.

まず、色信号振幅が垂直方向で変化した場合を第３図に
示す。ここでａ−１は第１．２図のａ〜ｉの各部に対応
した波形を示している。First, FIG. 3 shows a case where the color signal amplitude changes in the vertical direction. Here, a-1 indicates a waveform corresponding to each part of a to i in FIG. 1.2.

入力信号ａは、変換器であるくし形フィルタ３により色
信号が得られｂとなり、検波器８．９で検波することに
よりｃ、ｄとなり、比較器１０にてｅ、ｆの信号をＯＲ
することにより、ｇなる信号が出力され演算回路１２へ
送られる。信号ｇは、遅延回路１１によりＩＨ遅延され
たのち、信号りとなって演算回路１２へ送られる。そし
て信号ｇ、ｈを、演算回路１２で演算することにより、
ｉなる信号が出力される。ここで、信号ｉは、色の垂直
相関のない期間２を示していることがわかる。The input signal a is converted into a color signal b by the comb filter 3 which is a converter, and c and d are obtained by detection by the detector 8.9, and the signals e and f are ORed by the comparator 10.
As a result, a signal g is output and sent to the arithmetic circuit 12. The signal g is delayed by IH by the delay circuit 11 and then sent to the arithmetic circuit 12 as a signal. Then, by calculating the signals g and h in the calculation circuit 12,
A signal i is output. Here, it can be seen that signal i indicates period 2 in which there is no vertical correlation of colors.

次に色相が垂直方向で変化した場合を第４図に示す。Next, FIG. 4 shows a case where the hue changes in the vertical direction.

入力信号ａは変換器であるくし形フィルタ３により色信
号すとなり、検波器８．９で検波することによりｃ、ｄ
となり、比較器１０にてｅＸ　ｆ信号が得られ、ｇなる
信号が出力され演算回路１２へ送られる。また信号ｇは
、遅延回路ＩＩによりＩＨ遅延されたのち、信号りとな
って演算回路１２へ送られる。そして信号ｇ、ｈを演算
回路１２で演算することにより、ｉなる信号が出力され
る。ここで信号ｉは従来例では検出できなかった色相の
垂直相関のない期間２を示していることがわかる。つま
り第１図が示す如く、ＩＨ遅延回路で構成する変換器に
より、色相の垂直方向の変化を色の振幅方向の変化に変
換することにより、従来例でできなかった色相の垂直方
向の変化を検出することを可能にしたわけである。The input signal a is converted into a color signal by the comb filter 3 which is a converter, and is converted into c and d by being detected by the detector 8.9.
The eX f signal is obtained by the comparator 10, and a signal g is output and sent to the arithmetic circuit 12. Further, the signal g is delayed by IH by the delay circuit II, and then sent to the arithmetic circuit 12 as a signal. Then, by calculating the signals g and h in the calculation circuit 12, a signal i is output. Here, it can be seen that the signal i indicates a period 2 in which there is no vertical correlation of hues, which could not be detected in the conventional example. In other words, as shown in Figure 1, by converting the vertical change in hue into a change in the amplitude direction of the color using a converter composed of an IH delay circuit, vertical changes in hue that could not be achieved with the conventional example can be achieved. This made it possible to detect it.

ここで、バンドパスフィルタＢＰＦ２は、合成器５の後
段に位置してもよく、また検波器８．９の前後に位置し
てもよく、また除いてもよい。Here, the bandpass filter BPF2 may be located after the synthesizer 5, may be located before or after the detector 8.9, or may be omitted.

また本発明をＶＴＲ等の記録再生系に展開する場合、実
施例第１図のＢＰＦ２、変換器３までを記録系に挿入し
、それ以後のブロックを再生系に挿入し記録・再生系を
通すことにより本発明を実現することが可能である。こ
のようにすれば、遅延回路が２つで済むという長所もあ
る。Furthermore, when the present invention is applied to a recording/reproducing system such as a VTR, the blocks up to the BPF 2 and converter 3 shown in FIG. This makes it possible to realize the present invention. This has the advantage that only two delay circuits are required.

また、本発明をＰＡＬ方式に展開する場合、遅延回路の
遅延時間を、２　Ｈとする等若干の修正が必要である。Furthermore, when the present invention is applied to the PAL system, some modifications are required, such as setting the delay time of the delay circuit to 2H.

また、遅延回路をメモリ等で置きかえることにより本発
明をデジタル回路で実現することが可能であるが、本発
明の域をでるものではない。Further, the present invention can be implemented with a digital circuit by replacing the delay circuit with a memory or the like, but this does not go beyond the scope of the present invention.

発明の効果 以上の説明から明らかなように本発明は、入力色信号の
振幅及び位相の垂直方向の変化を変換器により一度振幅
方向の変化に変換した後に、前記比較回路により振幅レ
ベルを比較し、比較回路の出力を演算回路で演算するこ
とにより、色信号の垂直相関の有無を確実に検出するも
のであり、くし形フィルタを用いる信号処理回路にとっ
てその効果は大なるものがある。Effects of the Invention As is clear from the above description, the present invention converts vertical changes in the amplitude and phase of an input color signal into changes in the amplitude direction using a converter, and then compares the amplitude levels using the comparison circuit. By calculating the output of the comparator circuit in an arithmetic circuit, the presence or absence of vertical correlation of color signals can be reliably detected, and this has a great effect on a signal processing circuit using a comb filter.

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

第１図は本発明の一実施例による信号処理回路のブロッ
ク図、第２図はその要部のブロック図、第３図及び第４
図はそれぞれ第１図、第２図の各部の信号波形を示した
波形図、第５図は従来の信号処理回路のブロック図、第
６図はその波形図である。 ３・・・・・・変換器、７・・・・・・比較回路、１２
・・・・・・演算回路、４．６．１１・・・・・・ＩＨ
遅延回路、８．９・・・・・・検波回路、１０・・・・
・・比較器、１６．１７・・・・・・オペアンプ、１８
．１９・・・・・・ダイオード、５・・・・・・合成器
。 代理人の氏名　弁理士　中尾敏男　はか１名第３図 ４ｚ４　　　　　　４−とゆ 第４図 ４−Ｚ− 第５図 第６図FIG. 1 is a block diagram of a signal processing circuit according to an embodiment of the present invention, FIG. 2 is a block diagram of its main parts, and FIGS.
The figures are waveform diagrams showing signal waveforms at various parts in FIGS. 1 and 2, respectively. FIG. 5 is a block diagram of a conventional signal processing circuit, and FIG. 6 is a waveform diagram thereof. 3...Converter, 7...Comparison circuit, 12
......Arithmetic circuit, 4.6.11...IH
Delay circuit, 8.9...Detection circuit, 10...
... Comparator, 16.17 ... Operational amplifier, 18
．． 19...Diode, 5...Synthesizer. Name of agent Patent attorney Toshio Nakao 1 person Figure 3 4z4 4-Toyu Figure 4 4-Z- Figure 5 Figure 6

Claims (7)

【特許請求の範囲】[Claims] （１）入力色信号の振幅及び位相の垂直方向の変化を共
に振幅方向の変化に変換して出力する変換器と、前記変
換器の出力を所定時間遅延する第１の遅延回路と、前記
変換器の出力の振幅レベルと前記第１の遅延回路の出力
の振幅レベルを比較する比較回路と、前記比較回路の出
力を所定時間遅延する第２の遅延回路と、前記第１の比
較回路の出力と前記第２の遅延回路の出力とを演算する
演算回路を備え、入力色信号の振幅及び位相の垂直相関
を検出することを特徴とする信号処理回路。(1) A converter that converts vertical changes in the amplitude and phase of an input color signal into changes in the amplitude direction and outputs the same; a first delay circuit that delays the output of the converter for a predetermined time; and the converter. a comparison circuit that compares the amplitude level of the output of the first delay circuit with the amplitude level of the output of the first delay circuit; a second delay circuit that delays the output of the comparison circuit for a predetermined time; and an output of the first comparison circuit. A signal processing circuit comprising: an arithmetic circuit that calculates the output of the second delay circuit and the output of the second delay circuit, and detects a vertical correlation between the amplitude and phase of an input color signal. （２）変換器は、入力信号を所定期間遅延させる第３の
遅延回路と、前記第３の遅延回路の出力と前記入力信号
を合成する合成器から構成されることを特徴とする特許
請求の範囲第１項記載の信号処理回路。(2) The converter is comprised of a third delay circuit that delays an input signal for a predetermined period of time, and a synthesizer that combines the output of the third delay circuit and the input signal. The signal processing circuit according to scope 1. （３）比較回路は、入力信号を検波する第１及び第２の
検波器と、前記第１及び第２の検波器の出力レベルを比
較する比較器より構成されることを特徴とする特許請求
の範囲第１項記載の信号処理回路。(3) A patent claim characterized in that the comparison circuit includes first and second detectors that detect an input signal, and a comparator that compares the output levels of the first and second detectors. The signal processing circuit according to item 1. （４）演算回路は第１の比較回路の出力が１であり、か
つ第２の比較回路の出力が０である時のみに、１を出力
するように構成されていることを特徴とする特許請求の
範囲第１項記載の信号処理回路。(4) A patent characterized in that the arithmetic circuit is configured to output 1 only when the output of the first comparison circuit is 1 and the output of the second comparison circuit is 0. A signal processing circuit according to claim 1. （５）演算回路は第１の比較回路の出力が０であり、か
つ第２の比較回路の出力が１である時のみに、０を出力
するように構成されていることを特徴とする特許請求の
範囲第１項記載の信号処理回路。(5) A patent characterized in that the arithmetic circuit is configured to output 0 only when the output of the first comparison circuit is 0 and the output of the second comparison circuit is 1. A signal processing circuit according to claim 1. （６）所定期間を、１水平周期期間とすることを特徴と
する特許請求の範囲第１項記載の信号処理回路。(6) The signal processing circuit according to claim 1, wherein the predetermined period is one horizontal cycle period. （７）変換器の入力段もしくは後段、もしくは比較回路
の前段に、色信号成分を通過させるバンドパスフィルタ
を具備することを特徴とする特許請求の範囲第１項記載
の信号処理回路。(7) The signal processing circuit according to claim 1, further comprising a bandpass filter for passing a color signal component at an input stage or a subsequent stage of the converter, or at a stage before the comparison circuit.
JP27710485A 1985-04-25 1985-12-10 Signal processing circuit Expired - Lifetime JPH0671338B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP27710485A JPH0671338B2 (en) 1985-12-10 1985-12-10 Signal processing circuit
US06/854,746 US4734758A (en) 1985-04-25 1986-04-22 Signal processing circuit
DE8686303153T DE3684353D1 (en) 1985-04-25 1986-04-25 SIGNAL PROCESSING CIRCUIT.
EP86303153A EP0199602B1 (en) 1985-04-25 1986-04-25 Signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27710485A JPH0671338B2 (en) 1985-12-10 1985-12-10 Signal processing circuit

Publications (2)

Publication Number Publication Date
JPS62136188A true JPS62136188A (en) 1987-06-19
JPH0671338B2 JPH0671338B2 (en) 1994-09-07

Family

ID=17578831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27710485A Expired - Lifetime JPH0671338B2 (en) 1985-04-25 1985-12-10 Signal processing circuit

Country Status (1)

Country Link
JP (1) JPH0671338B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0370383A (en) * 1989-08-10 1991-03-26 Sony Corp Comb filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0370383A (en) * 1989-08-10 1991-03-26 Sony Corp Comb filter

Also Published As

Publication number Publication date
JPH0671338B2 (en) 1994-09-07

Similar Documents

Publication Publication Date Title
US5051818A (en) Video signal processing apparatus
KR900005813A (en) Luminance and Chromaticity Signal Separator
JPS647550B2 (en)
EP0173439B1 (en) Luminance/chrominance separator
JP2529834B2 (en) Video signal processor
JP2506530B2 (en) Luminance signal and color signal separation device for image signal
JPS62136188A (en) Signal processing circuit
US4734758A (en) Signal processing circuit
JPS62136187A (en) Signal processing circuit
JPS61247186A (en) Signal processing circuit
JPS63133784A (en) Signal processing circuit
JPS62152290A (en) Luminance signal and chrominance signal separating circuit
JPH0685586B2 (en) Signal processing device in digital correlation display and color television receiver
JPS62101193A (en) Hanging dot detector
JP3503442B2 (en) 2-line YC separator
KR900005604B1 (en) Magnetic recording and playback device
JP2610416B2 (en) NTSC digital chroma demodulation circuit
JP2537933B2 (en) Video signal separation device
JPS63149980A (en) Y/c separation circuit
JPH01296856A (en) Synchronizing signal separating device
JPH0644220Y2 (en) Luminance / Chromaticity separation circuit
JPH0362732A (en) Synchronizing signal level detector and pedestal level detector
JPH09252476A (en) Y/c separation circuit
KR19990004711A (en) Color and Luminance Signal Separation Circuit
JPH02193493A (en) Adaptive type comb line filter