JPH05199473A - Television signal receivers of different aspect ratios - Google Patents
Television signal receivers of different aspect ratiosInfo
- Publication number
- JPH05199473A JPH05199473A JP4028975A JP2897592A JPH05199473A JP H05199473 A JPH05199473 A JP H05199473A JP 4028975 A JP4028975 A JP 4028975A JP 2897592 A JP2897592 A JP 2897592A JP H05199473 A JPH05199473 A JP H05199473A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- receiver
- television
- compressed
- circuit
- 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
Landscapes
- Television Systems (AREA)
- Details Of Television Scanning (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は標準テレビ信号などを横
長標準テレビ受信機や高品位テレビ受信機へ表示するア
スペクト比の異なるテレビ信号受信機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal receiver having a different aspect ratio for displaying a standard television signal or the like on a horizontally long standard television receiver or a high definition television receiver.
【0002】[0002]
【従来の技術】高品位テレビ方式(アスペクト比16/
9)とアスペクト比の異なる現行標準テレビ方式(アス
ペクト比4/3)の信号を受信する高品位テレビ受信機
においては、標準テレビ方式の信号は高品位テレビCR
T画面の縦の長さを基準にして高品位テレビ方式に信号
変換し、図4に示す状態でCRT画面に映し出された。
ここで100は高品位テレビ方式のようなアスペクト比
が4/3より大なるCRT画面、101は標準テレビC
RT相当の画面領域、102,103は変換した標準テ
レビの映像信号がなく映し出されない領域、102e,
103eはそれらの前記領域の境界線部である。一方、
横長標準テレビ受信機の場合は上記テレビ方式信号変換
の必要はないが、図4に示す状態で画面に映し出され
た。2. Description of the Related Art High-definition television system (aspect ratio 16 /
9) In the high-definition television receiver that receives the signal of the current standard television system (aspect ratio 4/3) different in aspect ratio from 9), the signal of the standard television system is the high-definition television CR.
The signal was converted into a high-definition television system based on the vertical length of the T screen and displayed on the CRT screen in the state shown in FIG.
Here, 100 is a CRT screen having an aspect ratio larger than 4/3 as in a high definition television system, and 101 is a standard television C.
A screen area corresponding to RT, 102 and 103 are areas which are not displayed without a converted standard television image signal, 102e,
103e is a boundary line part of the above-mentioned areas. on the other hand,
In the case of a horizontally long standard television receiver, the television system signal conversion is not necessary, but it was displayed on the screen in the state shown in FIG.
【0003】[0003]
【発明が解決しようとする課題】上記のごとく高品位テ
レビ受信機や横長標準テレビ受信機などに、現行の標準
テレビ信号を映し出す時、その画面101の左右両端境
界線部102e,103eに以下に示すような問題があ
った。すなわち、映像の鮮鋭度を上げるため、それぞれ
の水平走査期間内の各時刻において輝度信号の変化量
(微分量)に比例した水平方向磁界を水平偏向磁界に重
畳し、輝度の変化する前後の部分で水平走査速度を基準
より速い速度及び遅い速度に変化させる所謂速度変調回
路を使用した場合である。As described above, when a current standard television signal is displayed on a high-definition television receiver or a horizontally long standard television receiver, the following are displayed on the left and right boundary parts 102e and 103e of the screen 101. There was a problem as shown. That is, in order to increase the sharpness of the image, a horizontal magnetic field proportional to the change amount (differential amount) of the luminance signal is superimposed on the horizontal deflection magnetic field at each time in each horizontal scanning period, and the portion before and after the change in luminance is superimposed. In the case of using a so-called speed modulation circuit for changing the horizontal scanning speed to a speed higher or lower than the reference speed.
【0004】図3に高品位テレビ受信機に速度変調回路
を使用した従来例を示す。ここで11は標準テレビ信号
入力端子、12は高品位テレビ信号に変換させる信号変
換回路、12aは輝度信号出力端子、14は高品位テレ
ビ受信機、14aは映像信号処理回路、14bはCR
T、14cはカソード、14dはグリッド電極、14
e,14fは水平・垂直偏向コイル、16は速度変調回
路、17は速度変調コイルである。FIG. 3 shows a conventional example in which a speed modulation circuit is used in a high definition television receiver. Here, 11 is a standard television signal input terminal, 12 is a signal conversion circuit for converting into a high-definition television signal, 12a is a luminance signal output terminal, 14 is a high-definition television receiver, 14a is a video signal processing circuit, and 14b is a CR.
T, 14c is a cathode, 14d is a grid electrode, 14
e and 14f are horizontal / vertical deflection coils, 16 is a velocity modulation circuit, and 17 is a velocity modulation coil.
【0005】前記信号変換回路12或いは映像信号処理
回路14aで発生した輝度信号の出力を速度変調回路1
6に送り、輝度の変化する前後部分で水平走査速度を基
準より速い速度及び遅い速度に変化させるような電流出
力を速度変調コイル17に送る。これによって映像の鮮
鋭度が向上した。The output of the luminance signal generated in the signal conversion circuit 12 or the video signal processing circuit 14a is used as the speed modulation circuit 1
6 and sends a current output to the speed modulation coil 17 so as to change the horizontal scanning speed to a higher speed and a lower speed than the reference in the front and rear portions where the brightness changes. This improved the sharpness of the image.
【0006】しかしながら図4に示す境界線部102
e,103eでは、速度変調回路16は輝度信号の大き
な変化量を受け、CRT画面の該境界線部102e,1
03eにリンギングを発生させ、ぎらついた見苦しい画
像となっていた。However, the boundary line portion 102 shown in FIG.
In e and 103e, the velocity modulation circuit 16 receives a large change amount of the luminance signal, and the boundary line portions 102e and 1e of the CRT screen are changed.
Ringing occurred in 03e, resulting in a glaring and unsightly image.
【0007】本発明の目的は上記の問題点を除去するた
めのもので、高品位テレビ受信機や横長標準テレビ受信
機などに、アスペクト比のより少ない標準テレビ信号な
どを受信する場合、速度変調回路を具備しても、それら
のCRT表示装置の画面にリンギングにより、ぎらつい
た見苦しい画像のない速度変調回路効果のあるテレビ受
信機を提供することを目的とするものである。An object of the present invention is to eliminate the above-mentioned problems. When a standard television signal having a smaller aspect ratio is received by a high-definition television receiver or a landscape standard television receiver, the speed modulation is performed. It is an object of the present invention to provide a television receiver having a speed modulation circuit effect which does not cause a glaring and unsightly image due to ringing on the screens of those CRT display devices even if the circuit is provided.
【0008】[0008]
【課題を解決するための手段】上記課題を解決するた
め、本発明のアスペクト比の異なるテレビ信号受信機
は、テレビ受信機の画面上において、当該受信機固有の
アスペクト比とは異なるアスペクト比の受信画像を再生
する際に、画面の両端に暗色レベル映像を生成するテレ
ビ信号受信機において、当該テレビ信号の受信画と暗色
レベル映像との境界部では、電子ビームの走査速度の速
度変調をオフすることを特徴とする。また、テレビ受信
機において、前記受信機のCRT画面のアスペクト比が
増加している比率に逆比例して、入力テレビ信号の各水
平周期走査時間を圧縮し、圧縮した時間相当の暗色レベ
ル映像信号をそれぞれ前記圧縮映像信号の前後に付加し
た変換映像信号を出力する一方、前記変換映像信号の輝
度信号の発生、及び、各水平周期走査期間の前記圧縮映
像信号開始時刻より所定時間加算した時刻から、該圧縮
映像信号終了時刻より所定時間減算した時刻まで制御信
号の発生をする画像変換手段と、映像の鮮鋭度を向上さ
せるCRT電子ビーム走査水平方向磁界を発生させる速
度変調回路及び速度変調コイルと、前記画像変換手段か
ら発生する前記輝度信号を同じ前記手段からの制御信号
が発生している時間だけ速度変調回路に通過させる速度
変調スイッチ回路とを具備し、前記入力テレビ信号方式
と前記テレビ受信機のテレビ信号方式が異なる時は、入
力テレビ信号を前記テレビ受信機のテレビ信号方式に変
換してから、前記画像変換手段に入力することを特徴と
する。In order to solve the above problems, a television signal receiver of a different aspect ratio according to the present invention has an aspect ratio different from the aspect ratio peculiar to the receiver on the screen of the television receiver. In a television signal receiver that generates dark color level images at both ends of the screen when playing back a received image, speed modulation of the electron beam scanning speed is turned off at the boundary between the received image of the television signal and the dark color level image. It is characterized by doing. Further, in the television receiver, each horizontal cycle scanning time of the input television signal is compressed in inverse proportion to the increasing ratio of the aspect ratio of the CRT screen of the receiver, and the dark color level video signal corresponding to the compressed time is compressed. While outputting the converted video signal added before and after the compressed video signal, the generation of the luminance signal of the converted video signal and the time obtained by adding a predetermined time from the compressed video signal start time in each horizontal scanning period An image conversion means for generating a control signal until a time obtained by subtracting a predetermined time from the end time of the compressed video signal, a speed modulation circuit and a speed modulation coil for generating a CRT electron beam scanning horizontal magnetic field for improving the sharpness of the video. A speed at which the luminance signal generated by the image conversion means is passed through the speed modulation circuit for the time during which the control signal from the same means is generated A tone switch circuit, and when the input television signal system and the television signal system of the television receiver are different, the input television signal is converted to the television signal system of the television receiver, and then the image conversion means is provided. It is characterized by inputting.
【0009】[0009]
【作用】横長標準テレビ受信機などテレビ受信機が、入
力テレビ信号方式と一致し、アスペクト比の少ないテレ
ビ信号を受信する時は、そのテレビ信号は画像変換手段
により、アスペクト比が大きく増加した値に逆比例して
水平周期走査時間を圧縮し、圧縮時間相当の黒レベル信
号映像信号を前後に付加した変換が像信号が映像処理回
路に送られている。一方、画像変換手段により発生した
輝度信号は速度変調回路に送られ、速度変調コイルに電
流を流す。画像変換手段により同時に発生している制御
信号により上記速度変調回路が作動するので、圧縮され
た画像の左右端境界線部付近の輝度信号の変化の大なる
部分では速度変調回路が作動しないようになる。When the television receiver such as the landscape standard television receiver receives the television signal having the same aspect ratio as the input television signal system and the aspect ratio is small, the aspect ratio of the television signal is greatly increased by the image conversion means. The image signal is sent to the video processing circuit by a conversion in which the horizontal cycle scanning time is compressed in inverse proportion to the above and the black level signal video signal corresponding to the compression time is added to the front and back. On the other hand, the luminance signal generated by the image conversion means is sent to the velocity modulation circuit, and a current is passed through the velocity modulation coil. Since the speed modulation circuit is activated by the control signal generated simultaneously by the image conversion means, the speed modulation circuit should be prevented from operating in a large portion of the change in the luminance signal near the left and right boundary lines of the compressed image. Become.
【0010】尚、高品位テレビ受信機などテレビ受信機
が、入力テレビ信号と異なり、アスペクト比の少ないテ
レビ信号を受信する時は、まず入力テレビ信号をテレビ
受信機のテレビ信号方式に変換してから、前記画像変換
手段に入力する。When a television receiver such as a high-definition television receiver receives a television signal having a small aspect ratio unlike the input television signal, first the input television signal is converted into the television signal system of the television receiver. To the image conversion means.
【0011】[0011]
【実施例】図1に一実施例のブロック図を示す。ここで
11,12,14,14a〜14f,16,17は図3
と同じである。13は画像変換手段、13aは変換映像
信号出力端子、13bは輝度信号出力端子、13cは制
御信号出力端子である。18は速度変調スイッチ回路で
ある。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a block diagram of one embodiment. Here, 11, 12, 14, 14a to 14f, 16 and 17 are shown in FIG.
Is the same as. Reference numeral 13 is an image converting means, 13a is a converted video signal output terminal, 13b is a luminance signal output terminal, and 13c is a control signal output terminal. Reference numeral 18 is a speed modulation switch circuit.
【0012】動作は次のようになる。標準テレビ信号は
信号変換回路12に高品位テレビ信号に変換される。次
に画像変換手段13で(4/3)/(16/9)の比率
で各水平周期走査時間を圧縮し、圧縮した時間相当の黒
レベル(暗色レベル)映像を前後に付加した変換映像信
号を出力端子13aより高品位テレビ受信機14に入力
する。一方、前記画像変換手段13の輝度信号出力端子
13bより画像変換される輝度信号を速度変調スイッチ
回路18に入力する。該速度変調スイッチ回路18には
前記画像変換手段によって制御信号が出力端子13cに
出力され前記速度変調スイッチ回路18の作動を制御す
る。前記制御信号は、圧縮された画像の左右両端境界部
102e,103e付近の輝度信号の変化量の大きな部
分で、速度変調スイッチ回路18をOFFの状態にする
ので、境界線部102e,103eでリンギングが起こ
ることはない。図2に輝度信号aと制御信号b及びテレ
ビ受信機の画面cとの関係を示す。走査時間でΔT1,
ΔT2だけ圧縮した時間よりさらに少なくした制御信号
を発生するようにする。また、図2において、制御信号
bの代わりに、制御信号dのようにアナログ量に比例し
て速度変調回路の出力電流を増減するようにしてもよ
い。The operation is as follows. The standard television signal is converted by the signal conversion circuit 12 into a high definition television signal. Next, the image conversion means 13 compresses each horizontal cycle scanning time at a ratio of (4/3) / (16/9), and a converted video signal in which black level (dark color level) video corresponding to the compressed time is added before and after. Is input to the high-definition television receiver 14 from the output terminal 13a. On the other hand, the brightness signal subjected to the image conversion from the brightness signal output terminal 13b of the image conversion means 13 is input to the speed modulation switch circuit 18. A control signal is output to the output terminal 13c of the speed modulation switch circuit 18 by the image conversion means to control the operation of the speed modulation switch circuit 18. The control signal causes the speed modulation switch circuit 18 to be in the OFF state in a portion where the amount of change in the luminance signal near the left and right boundary portions 102e and 103e of the compressed image is large, so that the ringing at the boundary line portions 102e and 103e. Will never happen. FIG. 2 shows the relationship between the luminance signal a, the control signal b, and the screen c of the television receiver. ΔT 1 in scanning time,
A control signal that is shorter than the time compressed by ΔT 2 is generated. Further, in FIG. 2, instead of the control signal b, the output current of the speed modulation circuit may be increased / decreased in proportion to the analog amount like the control signal d.
【0013】また、図1での実施例は入力テレビ信号が
テレビ受信機のテレビ信号方式と異なる場合であるが、
同一の場合は図1の信号変換回路12は必要ない。入力
が標準テレビ信号であり、テレビ受信機が横長標準テレ
ビ受信機の場合などが、同一の場合にあたる。In the embodiment shown in FIG. 1, the input TV signal is different from the TV signal system of the TV receiver.
In the same case, the signal conversion circuit 12 of FIG. 1 is not necessary. The same applies when the input is a standard television signal and the television receiver is a horizontally long standard television receiver.
【0014】[0014]
【発明の効果】高品位テレビ受信機や横長標準テレビ受
信機などに、アスペクト比のより少ない標準テレビ信号
などを受信する場合、速度変調回路を具備しても、CR
T表示装置の画面にリンギングによる見苦しい画像がな
くなり、しかも速度変調回路効果のあるテレビ受信機と
なる。When a standard television signal having a smaller aspect ratio is received by a high-definition television receiver or a horizontally long standard television receiver, even if a speed modulation circuit is provided, a CR
This makes it possible to eliminate the unsightly image due to ringing on the screen of the T display device and to provide a television receiver having a speed modulation circuit effect.
【図1】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図2】本発明の速度変調スイッチ回路への制御信号の
説明図である。FIG. 2 is an explanatory diagram of control signals to the speed modulation switch circuit of the present invention.
【図3】従来例のブロック図である。FIG. 3 is a block diagram of a conventional example.
【図4】画面の両端に映像信号が映し出されない状態を
示す説明図である。FIG. 4 is an explanatory diagram showing a state in which a video signal is not displayed on both ends of a screen.
11 標準テレビ入力端子 12 信号変換回路 13 画像変換手段 13a 変換映像信号出力端子 13b 輝度信号出力端子 13c 制御信号出力端子 14 高品位テレビ受信機 16 速度変調回路 17 速度変調コイル 18 速度変調スイッチ回路 11 standard television input terminal 12 signal conversion circuit 13 image conversion means 13a converted video signal output terminal 13b luminance signal output terminal 13c control signal output terminal 14 high-definition television receiver 16 speed modulation circuit 17 speed modulation coil 18 speed modulation switch circuit
Claims (2)
信機固有のアスペクト比とは異なるアスペクト比の受信
画像を再生する際に、画面の両端に暗色レベル映像を生
成するテレビ信号受信機において、当該テレビ信号の受
信画と暗色レベル映像との境界部では、電子ビームの走
査速度の速度変調をオフすることを特徴とするアスペク
ト比の異なるテレビ信号受信機。1. A television signal receiver for generating a dark color level image on both ends of a screen when a received image having an aspect ratio different from an aspect ratio peculiar to the receiver is reproduced on the screen of the television receiver, A television signal receiver having a different aspect ratio, characterized in that velocity modulation of an electron beam scanning velocity is turned off at a boundary portion between the received image of the television signal and the dark color level image.
比率に逆比例して、入力テレビ信号の各水平周期走査時
間を圧縮し、圧縮した時間相当の暗色レベル映像信号を
それぞれ前記圧縮映像信号の前後に付加した変換映像信
号を出力する一方、前記変換映像信号の輝度信号の発
生、及び、各水平周期走査期間の前記圧縮映像信号開始
時刻より所定時間加算した時刻から、該圧縮映像信号終
了時刻より所定時間減算した時刻まで制御信号の発生を
する画像変換手段と、 映像の鮮鋭度を向上させるCRT電子ビーム走査水平方
向磁界を発生させる速度変調回路及び速度変調コイル
と、 前記画像変換手段から発生する前記輝度信号を同じ前記
手段からの制御信号が発生している時間だけ速度変調回
路に通過させる速度変調スイッチ回路とを具備し、 前記入力テレビ信号方式と前記テレビ受信機のテレビ信
号方式が異なる時は、入力テレビ信号を前記テレビ受信
機のテレビ信号方式に変換してから、前記画像変換手段
に入力することを特徴とするアスペクト比の異なるテレ
ビ信号受信機。2. A television receiver, wherein each horizontal cycle scanning time of an input television signal is compressed in inverse proportion to a ratio in which an aspect ratio of a CRT screen of the receiver is increased, and a dark color corresponding to the compressed time is compressed. While outputting a converted video signal in which level video signals are added before and after the compressed video signal, a luminance signal of the converted video signal is generated and a predetermined time is added from the compressed video signal start time of each horizontal scanning period. Image conversion means for generating a control signal from the time when the predetermined time is subtracted from the end time of the compressed video signal, and a speed modulation circuit and speed for generating a CRT electron beam scanning horizontal magnetic field for improving the sharpness of the video. The modulation coil and the luminance signal generated from the image conversion means are passed through the speed modulation circuit for the time during which the control signal from the same means is generated. When the input TV signal system and the TV signal system of the TV receiver are different, the input TV signal is converted to the TV signal system of the TV receiver, and then the image conversion is performed. A television signal receiver having a different aspect ratio, characterized by inputting means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4028975A JPH05199473A (en) | 1992-01-20 | 1992-01-20 | Television signal receivers of different aspect ratios |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4028975A JPH05199473A (en) | 1992-01-20 | 1992-01-20 | Television signal receivers of different aspect ratios |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05199473A true JPH05199473A (en) | 1993-08-06 |
Family
ID=12263428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4028975A Pending JPH05199473A (en) | 1992-01-20 | 1992-01-20 | Television signal receivers of different aspect ratios |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05199473A (en) |
-
1992
- 1992-01-20 JP JP4028975A patent/JPH05199473A/en active Pending
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