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JPH02107080A - television receiver - Google Patents

television receiver

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Publication number
JPH02107080A
JPH02107080A JP63259457A JP25945788A JPH02107080A JP H02107080 A JPH02107080 A JP H02107080A JP 63259457 A JP63259457 A JP 63259457A JP 25945788 A JP25945788 A JP 25945788A JP H02107080 A JPH02107080 A JP H02107080A
Authority
JP
Japan
Prior art keywords
signal
circuit
aspect ratio
image
displayed
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
JP63259457A
Other languages
Japanese (ja)
Other versions
JP2669546B2 (en
Inventor
Yasuhiro Hirano
裕弘 平野
Norihiko Fukinuki
吹抜 敬彦
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP63259457A priority Critical patent/JP2669546B2/en
Publication of JPH02107080A publication Critical patent/JPH02107080A/en
Application granted granted Critical
Publication of JP2669546B2 publication Critical patent/JP2669546B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To reproduce an image on the television receiver of wide aspect ratio without distortion by converting an existing television signal into a signal to which time axis compression processing is executed and displaying it. CONSTITUTION:A demodulation operation is respectively executed in a wide aspect signal decoder circuit 1 and an existing television signal decoder circuit 2 and the prescribed time axis compression processing is executed to the signal of the decoder circuit 2 in a horizontal time axis compression circuit 3. Next, a part except an area to be displayed with existing aspect ratio is replaced with a specific signal of a black level equivalent in a specific signal insertion circuit 4 and an image signal equivalent to a magnification image is formed in an image magnification processing circuit 5 by interpolation processing or the like. Either of a signal system A' or B' is selected in a selection circuit 6, the signal of system A and the signal of system B are selected in a selection circuit 7 by a display mode control signal from a mode discrimination circuit 10, and displayed on a picture tube 8. Thus, the existing television signal can be displayed on the receiver of the wide aspect ratio without the distortion.

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(TV)受像機におけるビデオ信
号の信号処理に係り、特に、ワイドアスペクト比の受像
機において現行アスペクト比の画像表示に好適なテレビ
ジョン受像機に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to signal processing of video signals in television (TV) receivers, and is particularly suitable for displaying images of current aspect ratios in wide aspect ratio receivers. related to television receivers.

〔従来の技術〕[Conventional technology]

従来より、テレビジョン信号ではアスペクト比4:3の
形態のものが採用されてきた。しかしながら、最近、よ
り臨場感のある画像表示の可能なワイドアスペクト比の
テレビジョン受像機への関心が高まっている。例えば、
次世代のTVとして開発が進められているHDTVでは
アスペクト比が16:9の形態のものを採用している。
Conventionally, television signals have had an aspect ratio of 4:3. However, recently, there has been increasing interest in wide aspect ratio television receivers that can display images with a more realistic feeling. for example,
HDTVs, which are being developed as next-generation TVs, have an aspect ratio of 16:9.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ワイドアスペクト比のテレビジョン受像機では現行テレ
ビジョンシステムとの両立性について配慮がされておら
ず、この受像機で現行テレビジョン信号を受像すると、
再生画像が歪むといった問題があった。
Wide aspect ratio television receivers do not take into consideration compatibility with current television systems, and when receiving current television signals with this receiver,
There was a problem that the reproduced image was distorted.

本発明の目的は、ワイドアスペクト比のテレビジョン受
像機において、現行テレビジョン信号も歪なく画像再生
ができるテレビジョン受像機を提供することにある。
An object of the present invention is to provide a wide aspect ratio television receiver that can reproduce images of current television signals without distortion.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成するために、現行テレビジョン信号のよ
うにアスペクト比が従来の4:3のものに対しては1時
間軸圧縮の処理を施した信号に変換して表示することに
より、再生画像上の歪を除去したものである。
In order to achieve the above objective, by converting the conventional 4:3 aspect ratio, such as current television signals, into a signal that has undergone 1 time axis compression processing and displaying the reproduced image. This is the result with the above distortion removed.

また、時間軸圧縮の処理によって映像信号の存在しない
位置には特定の信号を挿入することによって、視聴者に
異和感をもたせないようにしたものである。
Moreover, by inserting a specific signal into a position where no video signal exists through time axis compression processing, the viewer is not made to feel strange.

さらに、現行テレビジョン信号において画面の上下を欠
落させることにより擬似的にワイドアスペクト化した信
号に対しては、画面信号の補間処理を行なうことにより
、拡大操作を行ないワイドアスペクトのままで表示でき
るようにしたものである。
Furthermore, by performing interpolation processing on the screen signal, it is possible to perform an enlargement operation and display the signal as it is in wide aspect, by performing interpolation processing on the screen signal for the current television signal that has been made into a pseudo wide aspect by omitting the top and bottom of the screen. This is what I did.

さらに、現行システムと走査線数の異なるワイドアスペ
クト比のテレビジョン受像機に対しては、水平、垂直の
いずれに対しても時間軸圧縮をほどこした信号に変換し
た信号、あるいは水平同期信号の周波数を変更して表示
するようにしたものである。
Furthermore, for wide aspect ratio television receivers with a different number of scanning lines than the current system, a signal converted to a signal with time axis compression applied both horizontally and vertically, or the frequency of the horizontal synchronization signal. is displayed by changing the .

〔作用〕[Effect]

第2図は、走査線数は現行テレビジョンと一致している
ワイドアスペクト比、例えば16:9のテレビジョン受
像機に対して本発明を適用した場合の動作原理図を示す
FIG. 2 shows an operational principle diagram when the present invention is applied to a wide aspect ratio television receiver, for example, 16:9, in which the number of scanning lines matches that of current televisions.

同図(a)は、現行システムのアスペクト比(4:3)
のテレビジョン信号をそのままワイドアスペクト化の受
像機で再生した場合の画像を示す。この場合にはアスペ
クト比4:3の画像が16=9のアスペクト比で表示さ
れるため、本来、図中実線で表示されるべき画像も、同
図点線で示すように水平方向に引き伸ばされた画像とし
て表示されてしまう。すなわち、画像に歪が生ずる。
Figure (a) shows the aspect ratio of the current system (4:3).
This shows an image obtained when a television signal of 2000 is played back as is on a wide-aspect receiver. In this case, an image with an aspect ratio of 4:3 is displayed with an aspect ratio of 16=9, so the image that should originally be displayed as a solid line in the figure is stretched horizontally as shown by the dotted line in the figure. It will be displayed as an image. In other words, distortion occurs in the image.

一方、同図(b)は、現行のテレビジョン信号に対して
、水平方向に時間軸圧縮の処理を行なって表示した場合
である。この場合にはアスペクト比4:3を保存した正
規の状態で、同図のハツチをほどこした領域内に表示で
きる。したがって、表示画像には歪は発生しない。なお
、この場合には、画面の両端の領域は情報がないため、
特定(N号、例えば黒レベルの信号などにおきかえて表
示することにより、視覚的にも好ましい画像号示ができ
る。
On the other hand, FIG. 6B shows a case where a current television signal is displayed after performing time axis compression processing in the horizontal direction. In this case, it can be displayed in the hatched area in the figure in a normal state with an aspect ratio of 4:3. Therefore, no distortion occurs in the displayed image. In this case, there is no information in the areas at both ends of the screen, so
By substituting and displaying a specific signal (N, for example, a black level signal, etc.), it is possible to display a visually preferable image signal.

一方、同図(C)に示すように、現行アスペクト比の枠
内で画面の上下を削ってワイドアスペクト化した画像に
対しては、(b)に示すような時間軸圧縮の処理により
、斜線領域に画像が表示される。したがって、このよう
な場合には、さらに補間処理などによって、画像拡大の
操作を行ない、画面全体に表示することもできる。
On the other hand, as shown in (C) of the same figure, for an image created by cutting the top and bottom of the screen within the frame of the current aspect ratio to create a wide aspect, the diagonal lines are reduced by time axis compression processing as shown in (b). The image is displayed in the area. Therefore, in such a case, the image can be further enlarged by interpolation processing or the like and displayed on the entire screen.

次に、第3図は、走査線数も現行テレビジョンと異なる
ワイドアスペクト比のテレビジョン受像機に対して本発
明を適用した場合の動作原理図を示す。なお、この例に
おいては、走査線数も現行テレビジョンより多く、アス
ペクト比が16=9のものを示す。
Next, FIG. 3 shows a diagram of the operating principle when the present invention is applied to a television receiver having a wide aspect ratio, which also has a different number of scanning lines than current televisions. In this example, the number of scanning lines is also greater than that of current televisions, and the aspect ratio is 16=9.

同図(a)は、水平方向、垂直方向の時間軸圧縮処理に
より現行走査線数の範囲内でアスペクト比4:3の画像
表示を行なうもので、ハツチの領域に現行アスペクト比
の画像が表示できる。なお、ハツチの領域外には表示す
べき情報がないため、前述したように5例えば黒レベル
相当の信号など、特定の信号でマスキングを行なうこと
が望ましい。
Figure (a) displays an image with an aspect ratio of 4:3 within the current number of scanning lines through horizontal and vertical time axis compression processing, and the image with the current aspect ratio is displayed in the hatched area. can. Note that since there is no information to be displayed outside the hatched area, it is desirable to perform masking using a specific signal, such as a signal corresponding to the black level, as described above.

また、同図(c)は、(a)の形態の信号に対して、さ
らに補間処理などによって画像拡大の操作を行ない、上
下いっばいの枠まで使用して画像表示を行なうものであ
る。
In addition, in FIG. 4(c), the signal in the form of FIG. 3(a) is further enlarged by interpolation processing, etc., and the image is displayed using up to the upper and lower frames.

一方、同図(b)は、水平同期系を変更して。On the other hand, in the same figure (b), the horizontal synchronization system is changed.

特価的に現行システムと同一の走査線数の表示形態に変
更し、この変更した同期系で水平に時間軸圧縮した信号
を表示するものである。なお、この場合には受像機の同
期系統が引き込み範囲内にある場合に適用できるもので
ある。
At a special price, the display format is changed to one with the same number of scanning lines as the current system, and a signal compressed horizontally on the time axis is displayed using this changed synchronization system. Note that this case can be applied when the synchronization system of the receiver is within the pull-in range.

以上、述べたように、本発明によれば、現行テレビジョ
ンシステムのアスペクト比とは異なるワイドアスペクト
比の受像機において、現行テレビジョン信号を歪なく画
像表示することが可能になる。
As described above, according to the present invention, it is possible to display an image of a current television signal without distortion in a receiver having a wide aspect ratio different from that of the current television system.

〔実施例〕〔Example〕

以下1本発明の一実施例を第1図により説明する。これ
は、走査線数は現行テレビジョンと同一でアスペクト比
が例えば16:9の場合における実施例である。また、
テレビジョン信号としてはベースバンド領域の信号を想
定して説明する。
An embodiment of the present invention will be described below with reference to FIG. This is an example in which the number of scanning lines is the same as that of current televisions and the aspect ratio is, for example, 16:9. Also,
The following explanation assumes that the television signal is a baseband signal.

テレビジョン信号は、ワイドアスペクト信号デコーダ回
路1.現行テレビジョン信号デコーダ回路2でそれぞれ
所定の復調操作を行ない、例えば3原色信号R,G、B
に復調する。
The television signal is processed by wide aspect signal decoder circuit 1. The current television signal decoder circuit 2 performs a predetermined demodulation operation, and for example, the three primary color signals R, G, B are
demodulates to.

一方、制御信号発明回路9では、各部の動作に必要なり
ロック信号、同期信号などの各種制御信号を生成する。
On the other hand, the control signal generation circuit 9 generates various control signals such as lock signals and synchronization signals necessary for the operation of each part.

また、モード識別回路10では、例えば識別信号などよ
り、ワイドアスペクト信号か現行テレビジョン信号かの
モードを識別判定する。
Further, the mode identification circuit 10 identifies and determines the mode of the wide aspect signal or the current television signal based on, for example, an identification signal.

さて、現行テレビジョン信号デコーダ回路2の信号は、
水平時間軸圧縮回路3において、第2図(b)に示すよ
な領域に相当する信号になるように、所定の時間軸圧縮
の処理を行なう。なお、この時間軸圧縮回路はメモリ等
を利用して簡単に実現できるので具体的な構成等につい
ては説明を省略する。
Now, the signal of the current television signal decoder circuit 2 is
In the horizontal time axis compression circuit 3, a predetermined time axis compression process is performed so that the signal corresponds to the area shown in FIG. 2(b). Note that this time axis compression circuit can be easily realized using a memory or the like, so a detailed explanation of its configuration will be omitted.

次に、特定信号挿入回路4では、現行アスペクト比で表
示される領域以外の部分に相当する画像信号部分を、例
えば黒レベル相当などの特定な信号でおきかえるといっ
た処理を行なう。
Next, the specific signal insertion circuit 4 performs a process of replacing the image signal portion corresponding to the area other than the area displayed at the current aspect ratio with a specific signal, such as one corresponding to the black level.

また、画像拡大処理回路5では、第2図(Q)に示した
ように、補間処理などにより拡大画像に相当する画像信
号を生成する。
Further, the image enlargement processing circuit 5 generates an image signal corresponding to an enlarged image by interpolation processing or the like, as shown in FIG. 2(Q).

選択回路6では、第2図(b)の表示形態に対応する信
号系列A′、同図(c)の表示形態に対応する信号系列
B′のいずれかを選択する。この選択はモード選択信号
によって行なわれ、通常は系列A′が選択されているが
視聴者によって系列B′の信号を選択すJることかでき
る。
The selection circuit 6 selects either the signal series A' corresponding to the display format shown in FIG. 2(b) or the signal series B' corresponding to the display format shown in FIG. 2(c). This selection is made by a mode selection signal, and although series A' is normally selected, the viewer can select a series B' signal.

そして1選択回路7では、ワイドアスペクト比に対応す
る系列Aの信号、現行アスペクト比に対応する系列Bの
信号がモード識別回路からの表示モード制御信号で選択
される。そして、3原色受像管8に表示する。
Then, in the 1 selection circuit 7, signals of series A corresponding to the wide aspect ratio and signals of series B corresponding to the current aspect ratio are selected by the display mode control signal from the mode identification circuit. Then, it is displayed on the three primary color picture tube 8.

本発明の他の実施例を第4図に示す。この実施例は、先
に第3図に示したように走査線数も異なるテレビジョン
受像機において、第3図(a)、あるいは(c)の形態
で画像表示を行なう場合を示す。この実施例では、第1
図の水平時間軸圧縮回路4が、水平、垂直時間軸圧縮回
路11となっている以外は同様である。そして、この水
平、垂直時間軸圧縮回路11において、水平方向のみな
らず、垂直方向に対しても時間軸圧縮処理が行なわれる
点を除けば、動作は第1図と同様なため、詳細な説明は
省略する。
Another embodiment of the invention is shown in FIG. This embodiment shows a case where an image is displayed in the form shown in FIG. 3(a) or (c) in a television receiver having a different number of scanning lines as shown in FIG. 3 above. In this example, the first
The configuration is the same except that the horizontal time axis compression circuit 4 in the figure is replaced by a horizontal and vertical time axis compression circuit 11. In this horizontal and vertical time axis compression circuit 11, the operation is the same as that in FIG. 1, except that time axis compression processing is performed not only in the horizontal direction but also in the vertical direction, so a detailed explanation will be provided. is omitted.

また、本発明の他の〜実施例を第5図に示すにれは、第
3図(b)に対応する画像信号を生成する場合である。
Another embodiment of the present invention is shown in FIG. 5, in which an image signal corresponding to FIG. 3(b) is generated.

この場合には、制御信号発生回路12では、ワイドアス
ペクト信号、現行テレビジョン信号に対してそれぞれ異
なる形態の水平同期信号系列を発生するといった相異点
はあるが、その他の動作は同一のため、詳細な説明は省
略する。
In this case, although there is a difference in that the control signal generation circuit 12 generates horizontal synchronization signal sequences of different formats for the wide aspect signal and the current television signal, the other operations are the same. Detailed explanation will be omitted.

以」二、本実施例においては、現行テレビジョン信号デ
コーダ回路の出力信号がR,G、B33原信号を例に説
明したが、特にこれに限定されることはなく、例えば輝
度信号、2つの色差信号のような形態のものにも適用可
能なことは明らかである。
2. In this embodiment, the output signals of the current television signal decoder circuit are R, G, and B33 original signals. It is clear that the present invention can also be applied to signals in the form of color difference signals.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、現行システムのアスペクト比とは異な
るワイドアスペクト比のテレビジョン受像機において、
ワイドアスペクト信号、現行テレビジョン信号のいずれ
も歪なく画像表示ができるので、同一の受像機でアスペ
クト比の異なる複数種類のテレビジョン信号の受信が可
能である。
According to the present invention, in a television receiver having a wide aspect ratio different from that of the current system,
Since both wide aspect signals and current television signals can be displayed without distortion, the same receiver can receive multiple types of television signals with different aspect ratios.

なお、本発明の信号処理は、アナログ、ディジタル5あ
るいは両者の混合したいずれの形態でも実現することが
できる。
Note that the signal processing of the present invention can be realized in any form of analog, digital, or a mixture of both.

また、受像管ではフリッカ−などの妨害を低減するため
に、順次走査の形態のものを使用することもある。この
場合には、現行テレビジョン信号デコーダ回路2は1例
えばIDTVのように走査線2倍化補間などの信号処理
を行なった信号が出力信号となっているような構成のも
ので実現することが望ましい。
Furthermore, in order to reduce interference such as flicker, a progressive scanning type picture tube is sometimes used. In this case, the current television signal decoder circuit 2 can be realized by having a configuration in which the output signal is a signal that has undergone signal processing such as scanning line doubling interpolation, as in IDTV, for example. desirable.

また、本実施例ではアスペクト比16:9を例に説明し
たが、これに限定されず、任意のワイドアスペクト比に
対しても過分可能なことは明らかである。
Furthermore, although the present embodiment has been described using an aspect ratio of 16:9 as an example, the present invention is not limited to this, and it is clear that any wide aspect ratio can be used.

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

第1図、第4図、第5図はそれぞれ本発明の一実施例の
テレビジョン受像機の回路ブロック図、第2図、第3図
は本発明の動作原理の説明図である。 1・・・ワイドアスペクト信号デコーダ回路、2・・・
現行テレビジョン信号デコーダ回路、3・・・水平時間
軸圧縮回路、4・・・特定信号挿入回路、5・・・画像
拡大処理回路、6,7・・・選択回路、8・・・3原色
受像管、9,12・・・制御信号発生回路、10・・・
モード識別回路、11・・・水平、垂直時間軸圧縮回路
。 第 2 図 (0−)刻しイ〒了スヘ0クト矛ヒイ努+Yのり)ネd
も(0ン(bン十、キ剣′間叉1埋1;よコミ用番主仁
文鳩 3 口
FIGS. 1, 4, and 5 are circuit block diagrams of a television receiver according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of the operating principle of the present invention. 1... Wide aspect signal decoder circuit, 2...
Current television signal decoder circuit, 3... Horizontal time axis compression circuit, 4... Specific signal insertion circuit, 5... Image enlargement processing circuit, 6, 7... Selection circuit, 8... 3 primary colors Picture tube, 9, 12... Control signal generation circuit, 10...
Mode identification circuit, 11...Horizontal and vertical time axis compression circuit. Figure 2 (0-) Engraved I
Mo (0n (bn ten, Kiken' 1 burying 1; Yokomi-yobanshu Nibun-hato 3 mouths)

Claims (1)

【特許請求の範囲】[Claims] 1、現行システムとは異なるアスペクト比を有する受像
管より成るテレビジョン受像機において、現行テレビジ
ョン信号、ワイドアスペクト比テレビジョン信号を識別
する手段を有し、受信テレビジョン信号を現行テレビジ
ョン信号と識別した場合には、受信テレビジョン信号を
時間軸圧縮した信号系列に変換し、この変換した信号を
受像管上に表示することを特徴とするテレビジョン受像
機。
1. In a television receiver consisting of a picture tube having an aspect ratio different from that of the current system, there is a means for identifying a current television signal and a wide aspect ratio television signal, and the received television signal is distinguished from the current television signal. A television receiver characterized in that when the received television signal is identified, the received television signal is converted into a time-axis compressed signal sequence, and the converted signal is displayed on a picture tube.
JP63259457A 1988-10-17 1988-10-17 Television receiver Expired - Lifetime JP2669546B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63259457A JP2669546B2 (en) 1988-10-17 1988-10-17 Television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63259457A JP2669546B2 (en) 1988-10-17 1988-10-17 Television receiver

Publications (2)

Publication Number Publication Date
JPH02107080A true JPH02107080A (en) 1990-04-19
JP2669546B2 JP2669546B2 (en) 1997-10-29

Family

ID=17334332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63259457A Expired - Lifetime JP2669546B2 (en) 1988-10-17 1988-10-17 Television receiver

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497679A (en) * 1990-08-14 1992-03-30 Mitsubishi Electric Corp Television signal converter
JPH057349A (en) * 1991-06-04 1993-01-14 Sharp Corp Wide aspect television receiver
JPH0591484A (en) * 1991-09-30 1993-04-09 Victor Co Of Japan Ltd Television receiver
JPH0543673U (en) * 1991-11-06 1993-06-11 日本ビクター株式会社 Video signal processing circuit
US5323235A (en) * 1991-10-30 1994-06-21 Mitsubishi Denki Kabushiki Kaisha Aspect ratio converting apparatus and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351922A (en) * 1976-10-21 1978-05-11 Sony Corp Television receiver
JPS63123287A (en) * 1986-11-12 1988-05-27 Matsushita Electric Ind Co Ltd Discriminating signal transmission method for non-standard television signal
JPS63185173A (en) * 1987-01-27 1988-07-30 Matsushita Electric Ind Co Ltd television receiver
JPS63198487A (en) * 1987-02-12 1988-08-17 Matsushita Electric Ind Co Ltd television receiver

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5351922A (en) * 1976-10-21 1978-05-11 Sony Corp Television receiver
JPS63123287A (en) * 1986-11-12 1988-05-27 Matsushita Electric Ind Co Ltd Discriminating signal transmission method for non-standard television signal
JPS63185173A (en) * 1987-01-27 1988-07-30 Matsushita Electric Ind Co Ltd television receiver
JPS63198487A (en) * 1987-02-12 1988-08-17 Matsushita Electric Ind Co Ltd television receiver

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497679A (en) * 1990-08-14 1992-03-30 Mitsubishi Electric Corp Television signal converter
JPH057349A (en) * 1991-06-04 1993-01-14 Sharp Corp Wide aspect television receiver
JPH0591484A (en) * 1991-09-30 1993-04-09 Victor Co Of Japan Ltd Television receiver
US5323235A (en) * 1991-10-30 1994-06-21 Mitsubishi Denki Kabushiki Kaisha Aspect ratio converting apparatus and method
JPH0543673U (en) * 1991-11-06 1993-06-11 日本ビクター株式会社 Video signal processing circuit

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