JPH04227166A - Television receiver - Google Patents

Television receiver

Info

Publication number
JPH04227166A
JPH04227166A JP2417559A JP41755990A JPH04227166A JP H04227166 A JPH04227166 A JP H04227166A JP 2417559 A JP2417559 A JP 2417559A JP 41755990 A JP41755990 A JP 41755990A JP H04227166 A JPH04227166 A JP H04227166A
Authority
JP
Japan
Prior art keywords
signal
phase
output
speed modulation
ghost
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
JP2417559A
Other languages
Japanese (ja)
Inventor
Yasuharu Abe
安倍 康晴
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.)
Fujitsu General Ltd
Original Assignee
Fujitsu General 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 Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP2417559A priority Critical patent/JPH04227166A/en
Publication of JPH04227166A publication Critical patent/JPH04227166A/en
Pending legal-status Critical Current

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  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

PURPOSE:To improve image quality by varying the phase of a modulating current supplied to the velocity modulation coil for contour correction of an image loaded on a picture tube neck corresponding to a ghost signal in a video signal to which neighboring ghost signals are mixed. CONSTITUTION:A current C on the velocity modulation coil 5 can be corrected and a contour correction effect on a ghost signal part can be suppressed by performing the waveform shaping of the secondary differentiation signal Y1 of an input luminance signal Y by a digital delay part 2, and also, varying the phase of the secondary differentiation signal Y1 corresponding to control data S outputted from a tuner part 6 based on the phase of the ghost signal at every reception channel.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】カラーテレビ受像機、ディスプレ
イモニタ等映像関連機器の受像管の電子ビーム速度変調
による画像補正に関する。
[Industrial Application Field] The present invention relates to image correction by electron beam velocity modulation of picture tubes of video-related equipment such as color television receivers and display monitors.

【0002】0002

【従来技術】画像の輪郭補正のための速度変調回路は輝
度信号Yを利用して受像管ネックに装着した速度変調コ
イルに所定の電流を流す。従って、速度変調コイルの電
流は輝度信号Yと同じ位相関係にあり、受像管のカソー
ド等をドライブする映像回路の出力信号に対して一定な
位相関係とし、画像の輪郭を最良の状態に補正する。し
かし、図4に示す受像画面7のように、近接ゴースト信
号(点線で表示)等が混入すると、源映像信号A(実線
で表示)は乱れた映像信号Bとなるため、正規の速度変
調幅T1 に対して幅広T2 の速度変調幅となる。従
って、速度変調コイルを流れる幅広T2 の変調電流C
によりゴースト信号部の輪郭を強調する不具合を生じ画
質が著しく劣化する等の欠点がある。
2. Description of the Related Art A speed modulation circuit for image contour correction uses a luminance signal Y to flow a predetermined current through a speed modulation coil attached to the neck of a picture tube. Therefore, the current in the speed modulation coil has the same phase relationship as the luminance signal Y, and has a constant phase relationship with the output signal of the video circuit that drives the cathode of the picture tube, etc., correcting the outline of the image to the best condition. . However, as shown in the image receiving screen 7 shown in FIG. 4, if a nearby ghost signal (indicated by a dotted line) or the like is mixed in, the source video signal A (indicated by a solid line) becomes a disturbed video signal B. The speed modulation width is wider than T1. Therefore, the wide T2 modulation current C flowing through the velocity modulation coil
This has drawbacks such as the problem of emphasizing the outline of the ghost signal portion and significantly deteriorating the image quality.

【0003】0003

【発明が解決しようとする課題】本発明は従来例に鑑み
てなされたもので、近接するゴースト信号等の混入する
映像信号において、受像管ネックに装着した速度変調コ
イルに供給する変調電流の位相をゴースト信号に応じて
可変し、画像の輪郭補正の不具合を軽減し画質の改善を
図ることを目的とする。
Problem to be Solved by the Invention The present invention has been made in view of the conventional example, and it is an object of the present invention to change the phase of the modulating current supplied to the velocity modulating coil attached to the picture tube neck in a video signal mixed with adjacent ghost signals, etc. The objective is to reduce defects in image contour correction and improve image quality by varying the value according to the ghost signal.

【0004】0004

【課題を解決するための手段】本発明は、画像の輪郭補
正のための速度変調回路用輝度信号Yを2次微分し、デ
ィジタルディレイ部で波形成形すると共に、受信チャン
ネル毎のゴースト信号の位相に基づくチューナ部出力の
制御信号データに応じて2次微分信号の位相を可変する
ことで速度変調コイルの電流を補正し、ゴースト信号部
の輪郭補正効果を抑圧することに特徴がある。
[Means for Solving the Problems] The present invention second-order differentiates a luminance signal Y for a speed modulation circuit for image contour correction, shapes the waveform in a digital delay section, and adjusts the phase of a ghost signal for each reception channel. The present invention is characterized in that the current of the speed modulation coil is corrected by varying the phase of the second-order differential signal in accordance with the control signal data of the tuner output based on the control signal data, thereby suppressing the contour correction effect of the ghost signal portion.

【0005】[0005]

【作用】図1に示すように、輝度信号Yの2次微分回路
1、ディジタルディレイ部2、合成器3、速度変調回路
4、速度変調コイル5、チューナ部6の回路構成からな
り、ディジタルディレイ部2でチューナ部6出力の制御
信号データSにより輝度信号Yの2次微分信号Y1 を
位相シフトした信号Y2 と、2次微分信号Y1 との
合成信号を速度変調回路4のドライブ信号とし、速度変
調コイル5に輪郭補正用電流Cを供給する。
[Operation] As shown in FIG. 1, the circuit consists of a second-order differentiator circuit 1 for the luminance signal Y, a digital delay section 2, a synthesizer 3, a speed modulation circuit 4, a speed modulation coil 5, and a tuner section 6. A signal Y2 obtained by phase-shifting the second-order differential signal Y1 of the luminance signal Y using the control signal data S output from the tuner section 6 in section 2 and a composite signal of the second-order differential signal Y1 is used as a drive signal for the speed modulation circuit 4, and the speed A contour correction current C is supplied to the modulation coil 5.

【0006】[0006]

【実施例】画像の鮮鋭度を向上させるためには、シャー
プなプリシュートおよびシャープなオーバシュートをつ
けるため受像管の電子ビームの速度を変調することで、
等価的に受像管のカソード信号に輝度変化を起こさせ水
平方向の画像の輪郭補正を行う。図1に受像管のネック
に装着した電子ビームの速度変調コイル5による位相可
変型速度変調回路のブロック図を示す。1はチューナ部
6出力の輝度信号Yを微分する2次微分回路、2はチュ
ーナ部6出力の制御信号データSにより2次微分回路1
出力2次微分信号Y1 のディジタル波形成形および位
相シフト等の処理をするディジタルディレイ部、3はデ
ィジタルディレイ部2出力の2次微分位相シフト信号Y
2 と2次微分信号Y1 との合成器、4は合成器3出
力信号の位相で速度変調コイル5に輪郭補正用電流Cを
供給する速度変調回路、6は受信チャンネル毎のゴース
ト信号に基づき画像の輪郭補正位相を制御する信号デー
タSを出力するチューナ部である。
[Example] In order to improve the sharpness of the image, the speed of the electron beam of the picture tube is modulated to create sharp preshoot and sharp overshoot.
Equivalently, a brightness change is caused in the cathode signal of the picture tube to correct the contour of the image in the horizontal direction. FIG. 1 shows a block diagram of a phase variable speed modulation circuit using an electron beam speed modulation coil 5 attached to the neck of a picture tube. 1 is a second-order differentiator circuit that differentiates the luminance signal Y output from the tuner section 6; 2 is a second-order differentiator circuit 1 that uses the control signal data S output from the tuner section 6;
A digital delay section processes the digital waveform shaping and phase shift of the output second-order differential signal Y1, and 3 is the second-order differential phase shift signal Y of the output of the digital delay section 2.
2 is a synthesizer for the second-order differential signal Y1; 4 is a speed modulation circuit that supplies a contour correction current C to the speed modulation coil 5 at the phase of the output signal of the synthesizer 3; 6 is a speed modulation circuit that supplies an image correction current C to the speed modulation coil 5 based on the ghost signal of each receiving channel; This is a tuner unit that outputs signal data S for controlling the contour correction phase of the .

【0007】図2に前記図1のディジタルディレイ部2
のブロック図を示す。10は2次微分信号Y1 の低域
通過フィルタ、11はディジタル変換器、12はサブサ
ンプリング等により波形応答の良い信号を作り出す波形
成形および制御データSに応じて位相を可変してプリシ
ュート側またはオーバシュート側に画像の輪郭強調補正
位置を設定するシフトレジスタ、15はチューナ部6の
システムコントロール出力等のゴースト信号に基づく制
御データSにより前記シフトレジスタを制御するデコー
ダ、13はアナログ変換器、14は低域通過フィルタで
ある。
FIG. 2 shows the digital delay section 2 of FIG.
The block diagram is shown below. 10 is a low-pass filter for the second-order differential signal Y1, 11 is a digital converter, and 12 is a waveform shape that generates a signal with good waveform response by subsampling, etc., and whose phase is varied according to the control data S, to the preshoot side or 15 is a decoder that controls the shift register with control data S based on a ghost signal such as the system control output of the tuner unit 6; 13 is an analog converter; 14 is a low pass filter.

【0008】例えば、図3に示すように、近接したゴー
スト信号(点線で表示)の混入した入力信号Yの場合、
ディジタルディレイ部2入力の2次微分信号Y1 に対
して、ディジタルディレイ部2出力信号Y2 をチュー
ナ部6システムコントロール出力の制御データSにより
画質を損なわない位置に位相シフトし、ゴースト信号部
での輪郭補正効果を抑圧して画質を改善する。尚、シス
テムコントロール出力等の制御データSはゴースト画面
を見ながらのユーザコントロールおよび受像機のチャン
ネルプリセット等任意に設定可能である。
For example, as shown in FIG. 3, in the case of an input signal Y mixed with a nearby ghost signal (indicated by a dotted line),
With respect to the second-order differential signal Y1 input to the digital delay section 2, the digital delay section 2 output signal Y2 is phase-shifted to a position that does not impair image quality using the control data S of the system control output of the tuner section 6, and the outline in the ghost signal section is Improve image quality by suppressing correction effects. The control data S such as system control output can be arbitrarily set by user control while viewing the ghost screen, channel preset of the receiver, etc.

【0009】[0009]

【発明の効果】以上のように本発明は、画像の輪郭補正
のための速度変調回路用輝度信号Yを2次微分し、ディ
ジタルディレイ部で波形成形すると共に、受信チャンネ
ル毎のゴースト信号に基づくチューナ部出力の制御信号
データに応じて任意に2次微分信号の位相を設定し、速
度変調コイルに供給する変調電流の波形と位相を補正す
ることで、画像ゴースト部の輪郭補正の不具合を軽減し
画質の改善を図ることができる。
As described above, the present invention secondarily differentiates the luminance signal Y for a speed modulation circuit for image contour correction, shapes the waveform in a digital delay section, and generates a signal based on a ghost signal for each reception channel. By arbitrarily setting the phase of the second-order differential signal according to the control signal data of the tuner output and correcting the waveform and phase of the modulation current supplied to the speed modulation coil, problems with contour correction of image ghost parts are reduced. It is possible to improve the image quality.

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

【図1】位相可変型の速度変調回路のブロック図である
FIG. 1 is a block diagram of a phase variable speed modulation circuit.

【図2】図1のディジタルディレイ部のブロック図であ
る。
FIG. 2 is a block diagram of a digital delay section in FIG. 1;

【図3】図1の動作波形図である。FIG. 3 is an operational waveform diagram of FIG. 1;

【図4】従来の速度変調動作を説明するための受像画面
に対する動作波形図である。
FIG. 4 is an operation waveform diagram for an image receiving screen for explaining a conventional speed modulation operation.

【符号の説明】[Explanation of symbols]

1  2次微分回路 2  シフトレジスタ12、デコーダ15等からなるデ
ィジタルディレイ部 3  信号の合成器 4  速度変調回路 5  受像管の電子ビームを変調する速度変調コイル6
  チューナ部
1 Second-order differentiator circuit 2 Digital delay section 3 consisting of shift register 12, decoder 15, etc. Signal combiner 4 Velocity modulation circuit 5 Velocity modulation coil 6 that modulates the electron beam of the picture tube
Tuner part

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】  輝度信号Yの2次微分回路と、同2次
微分回路出力信号の位相をディレイするディジタルディ
レイ部と、同ディジタルディレイ部の入力信号と出力信
号との合成器と、受像管の電子ビームを変調する速度変
調回路とを有し、チューナ部システムコントロール出力
等の制御信号データにより前記ディジタルディレイ部出
力信号の位相を可変し、前記速度変調回路出力の速度変
調用電流波形を補正してなるテレビ受像機。
1. A second-order differentiator circuit for a luminance signal Y, a digital delay section that delays the phase of an output signal of the second-order differentiator circuit, a synthesizer for input and output signals of the digital delay section, and a picture tube. a speed modulation circuit that modulates the electron beam of the speed modulation circuit, the phase of the digital delay section output signal is varied by control signal data such as a tuner section system control output, and the current waveform for speed modulation of the speed modulation circuit output is corrected. A television receiver.
【請求項2】  前記ディジタルディレイ部が2次微分
信号の低域通過フィルタとディジタル変換器と信号位相
をシフトするシフトレジスタとアナログ変換器と出力用
フィルタと前記シフトレジスタを制御するデコーダとか
らなる請求項1のテレビ受像機。
2. The digital delay section includes a low-pass filter for a second-order differential signal, a digital converter, a shift register for shifting the signal phase, an analog converter, an output filter, and a decoder for controlling the shift register. A television receiver according to claim 1.
JP2417559A 1990-12-28 1990-12-28 Television receiver Pending JPH04227166A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2417559A JPH04227166A (en) 1990-12-28 1990-12-28 Television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2417559A JPH04227166A (en) 1990-12-28 1990-12-28 Television receiver

Publications (1)

Publication Number Publication Date
JPH04227166A true JPH04227166A (en) 1992-08-17

Family

ID=18525648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2417559A Pending JPH04227166A (en) 1990-12-28 1990-12-28 Television receiver

Country Status (1)

Country Link
JP (1) JPH04227166A (en)

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