JPH0251984A - Television signal system converter - Google Patents

Television signal system converter

Info

Publication number
JPH0251984A
JPH0251984A JP63201889A JP20188988A JPH0251984A JP H0251984 A JPH0251984 A JP H0251984A JP 63201889 A JP63201889 A JP 63201889A JP 20188988 A JP20188988 A JP 20188988A JP H0251984 A JPH0251984 A JP H0251984A
Authority
JP
Japan
Prior art keywords
circuit
television signal
signal
definition television
screen
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
JP63201889A
Other languages
Japanese (ja)
Inventor
Yasuaki Sakanishi
保昭 坂西
Kazuhiro Miyabe
一裕 宮部
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 JP63201889A priority Critical patent/JPH0251984A/en
Publication of JPH0251984A publication Critical patent/JPH0251984A/en
Pending legal-status Critical Current

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  • Television Systems (AREA)

Abstract

PURPOSE:To freely switch a projection range at the time of projecting a high- definition television signal to a standard television receiver by delaying the timing of an address generating circuit to control a memory circuit. CONSTITUTION:The title converter is equipped with a scanning line converting circuit 2 to convert the high-definition television signal to the number of scanning lines of a standard television signal, a memory circuit 3 to store the scanning-line-converted signal, an address generating circuit 4 to control the memory circuit 3 and a timing delaying circuit 5 to delay the control signal of the timing of the address generating circuit 4. By the timing delaying circuit 5, the projected part of a screen is freely switched. Thus, the omission of the information of the picture due to a difference in aspect ratio when the high- definition television signal is scanning-line-converted and projected on a current standard system television receiver can be compensated with a simple method.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、標準カラーテレビジョン信号とアスペクト比
の異なる高品位テレビジョン信号を方式変換して、現行
標準カラーテレビジョン受像機で高品位テレビジョン信
号を受信できるようにするテレビジョン信号方式変換装
置に関するものである。
Detailed Description of the Invention (Field of Industrial Application) The present invention converts a standard color television signal and a high-definition television signal with a different aspect ratio to provide high-definition television on a current standard color television receiver. The present invention relates to a television signal format conversion device that enables reception of television signals.

(従来の技術) カラーテレビジョンの標準方式は、画面の縦横の比率で
あるアスペクト比が4=3になるように構成されている
。走査線の数はNTSC方式の場合525本、PAL方
式、SECAM方式の場合625本である。それに対し
て1次世代のテレビジョン放送方式である高品位テレビ
ジョン放送は、走査線を現行カラーテレビジョン方式の
およそ2倍の本数にし、さらに臨場感と迫力を生み出す
ために、現行テレビジョンよりも横に長い画面構成をと
っている。
(Prior Art) A standard color television system is configured so that the aspect ratio, which is the ratio of the length and breadth of the screen, is 4=3. The number of scanning lines is 525 in the case of the NTSC system, and 625 in the case of the PAL system and the SECAM system. On the other hand, high-definition television broadcasting, which is the next generation television broadcasting system, uses approximately twice the number of scanning lines as the current color television system, and in order to create a sense of realism and impact, it uses more scanning lines than current television systems. It also has a horizontally long screen configuration.

例えば、NHKの開発したハイビジョンでは、走査線数
1125本、アスペクト比16:9という値をとってい
る。
For example, the high-definition system developed by NHK has a number of scanning lines of 1125 and an aspect ratio of 16:9.

しかし、この高品位テレビジョン放送は、現行放送方式
用のテレビジョン受像機ではそのまま受信することがで
きないため、高品位テレビジョン信号を標準方式信号に
走査線変換して現行テレビジョン受像機で受信できるよ
うにする方式変換装置が必要となる。その際1問題とな
るのが高品位テレビジョン信号と標準方式テレビジョン
信号のアスペクト比の違いである。そこで、高品位テレ
ビジョン信号を現行テレビジョン受像機に映す場合の画
面処理として、次の3つの方式が考えられている。第1
の方法は、第3図Aに示すように、横長の高品位テレビ
ジョンの画像の両端をカットして取り除き、アスペクト
比を4=3にする方法であり、第2の方法は、第3図B
に示すように。
However, this high-definition television broadcast cannot be received as is with a television receiver for the current broadcasting system, so the high-definition television signal is scan line converted into a standard system signal and then received by the current television receiver. A system conversion device is required to enable this. One problem in this case is the difference in aspect ratio between high-definition television signals and standard television signals. Therefore, the following three methods have been considered for screen processing when displaying high-definition television signals on current television receivers. 1st
The second method is to cut and remove both ends of the horizontal high-definition television image to make the aspect ratio 4=3, as shown in Figure 3A.The second method is as shown in Figure 3A. B
As shown.

高品位テレビジョンの画像を横方向に圧縮してアスペク
ト比を4=3にする方法であり、第3の方法は、第3図
Cに示すように、水平方向のみならず垂直方向にも圧縮
して、はぼもとの高品位テレビジョン画像のアスペクト
比のまま4=3の画面の中にはめこむ方法であり、この
時、画面の上下には像は存在しない。
This is a method of compressing a high-definition television image horizontally to make the aspect ratio 4=3.The third method, as shown in Figure 3C, compresses not only the horizontal direction but also the vertical direction. This is a method of fitting the original high-definition television image into a 4=3 screen with its aspect ratio unchanged; at this time, there are no images above or below the screen.

上記3つの方法のうち、ここでは第1の方法について説
明する。高品位テレビジョン信号を現行標準テレビジョ
ン受像機に映出する際のブロック図を第4図に示す。
Of the above three methods, the first method will be described here. FIG. 4 shows a block diagram for displaying a high-definition television signal on a current standard television receiver.

高品位テレビジョン信号を高品位テレビジョン信号入力
端子7に入力し、走査線変換回路8によって走査線数を
現行テレビジョン信号と同一にする。そして、その走査
線変換された信号をメモリ回路9に取り込んで、アドレ
ス発生回路10によって書き込み、読み出しアドレスを
適当に与えることにより、第3図Aのように両端がカッ
トされた画像を得ることができる。
A high-definition television signal is input to a high-definition television signal input terminal 7, and a scanning line conversion circuit 8 makes the number of scanning lines the same as that of the current television signal. Then, by taking in the scanning line converted signal into the memory circuit 9, writing it in by the address generation circuit 10, and appropriately giving a read address, it is possible to obtain an image with both ends cut off as shown in FIG. 3A. can.

(発明が解決しようとするTs題) しかしながら、上述した3つの方法には、それぞれ次の
ような問題点がある。まず、第3図への方法では、画面
の水平方向の両端の情報が欠落してしまうという問題点
を有している。画面の両端であるからそれ程の影響はな
いが、例えば野球中継において得点や回数、アウトカウ
ントなどの表示が両端部に表示される場合もあり、その
ような場合には不都合が生じる。第3図Bの方法では、
第3図Aの方法のように情報が欠落するといったことは
ないが、画像が縦長になり不自然である。
(Ts problem to be solved by the invention) However, each of the three methods described above has the following problems. First, the method shown in FIG. 3 has the problem that information at both ends of the screen in the horizontal direction is lost. Since it is located at both ends of the screen, it does not have much of an effect, but, for example, during baseball broadcasts, displays such as scores, number of plays, out counts, etc. may be displayed at both ends, and in such a case, an inconvenience occurs. In the method shown in Figure 3B,
Although information is not lost as in the method shown in FIG. 3A, the image becomes vertically elongated and unnatural.

また、第3図Cの方法では、元の画像の感じを保ったま
ま画面の全情報を表示することができるが、上下両端に
は画像が無いため、このような使い方を長い間している
と、ブラウン管などの表示装置に型が残ってしまう恐れ
がある。
Also, with the method shown in Figure 3C, it is possible to display all the information on the screen while preserving the feel of the original image, but since there are no images at both the top and bottom edges, this method has been used for a long time. If this occurs, there is a risk that the mold may remain on display devices such as cathode ray tubes.

本発明は、上記問題点に鑑み、高品位テレビジョン信号
を走査線変換して現行標準方式テレビジョン受像機に映
出する場合のアスペクト比の違いによる画像の情報の欠
落を簡単な方法で補うことのできるテレビジョン信号方
式変換装置を提供するものである。
In view of the above problems, the present invention uses a simple method to compensate for the lack of image information due to differences in aspect ratio when scanning line converting a high-definition television signal and displaying it on a current standard television receiver. The present invention provides a television signal format conversion device that can perform the following functions.

(a題を解決するための手段) 本発明は1以上のような課題を解決するために。(Means for solving problem a) The present invention solves one or more problems.

高品位テレビジョン信号を久方信号とする高品位テレビ
ジョン信号入力端子と、該久方端子に接続され、高品位
テレビジョン信号の走査線数を標準テレビジョン信号の
走査線数に変換する走査線変換回路と、該走査線変換回
路の出方を記憶するメモリ回路と、該メモリ回路を制御
するアドレス発生回路と、該アドレス発生回路の出力で
ある制御(76号を遅延させて画面を左右に移動させる
タイミング遅延回路と、上記メモリ回路の出方に接続さ
れた変換信号出力端子とを備え、映像画面を左右方向に
移動することができるよう構成した。
A high-definition television signal input terminal that takes a high-definition television signal as a long signal, and a scanning terminal connected to the high-definition terminal that converts the number of scanning lines of the high-definition television signal to the number of scanning lines of a standard television signal. A line conversion circuit, a memory circuit that stores the output of the scanning line conversion circuit, an address generation circuit that controls the memory circuit, and a control that outputs the address generation circuit (No. 76 is delayed to change the screen left and right). The device is equipped with a timing delay circuit for moving the video screen, and a conversion signal output terminal connected to the output side of the memory circuit, so that the video screen can be moved in the left-right direction.

(作 用) 本発明は、上記した構成により、標準テレビジョン方式
とアスペクト比の異なる高品位テレビジョン信号を標準
テレビジョン受像機に映出する際、高品位テレビジョン
の画面の取り込み位置を無段階に切り換えることにより
、画面の左端から右端まで無段階に画面の見える位置を
ずらすことにより、画面全体を見ることができる。
(Function) With the above-described configuration, the present invention eliminates the capture position of the high-definition television screen when displaying a high-definition television signal having an aspect ratio different from that of the standard television system on a standard television receiver. By switching step by step, you can steplessly shift the viewing position of the screen from the left end to the right end of the screen, allowing you to see the entire screen.

(実施例) 以下、本発明の一実施例のテレビジョン信号方式変換装
置について、第1図を参照しながら説明する。
(Embodiment) Hereinafter, a television signal format conversion device according to an embodiment of the present invention will be described with reference to FIG.

第1図は、本発明の一実施例におけるテレビジョン信号
方式変換装置のブロック図である。第1図において、1
は高品位テレビジョン信号入力端子、2は高品位テレビ
ジョン信号を標準テレビジョン信号の走査線数に変換す
る走査線変換回路、3は走査線変換された信号を記憶す
るメモリ回路、4はメモリ回路を制御するアドレス発生
回路、5はアドレス発生回路4のタイミングの制御信号
を遅延させるタイミング遅延回路、6は変換信号出力端
子である。
FIG. 1 is a block diagram of a television signal format converter according to an embodiment of the present invention. In Figure 1, 1
is a high-definition television signal input terminal, 2 is a scanning line conversion circuit that converts the high-definition television signal to the number of scanning lines of a standard television signal, 3 is a memory circuit that stores the scan line-converted signal, and 4 is a memory An address generation circuit controls the circuit; 5 is a timing delay circuit that delays the timing control signal of the address generation circuit 4; and 6 is a conversion signal output terminal.

以上のように構成されたテレビジョン信号方式変換装置
について簡単に説明する。
The television signal format converter configured as described above will be briefly described.

走査線変換回路2により走査線変換された信号をメモリ
回路3に取り込み、アドレス発生回路4の制御信号によ
って水平方向の映出範囲を第2図Aのようにする。そし
て、上記制御信号にある一定の遅延作用を加えてやり、
第2図Bのように映出する画面をずらしてやる。また、
上記と同じようにアドレス発生回路4の制御信号に遅延
作用を加えてやり、第2図Cのように画面を映出させる
A signal subjected to scanning line conversion by the scanning line conversion circuit 2 is taken into the memory circuit 3, and the horizontal projection range is set as shown in FIG. 2A by the control signal of the address generation circuit 4. Then, by adding a certain delay effect to the above control signal,
Shift the projected screen as shown in Figure 2B. Also,
In the same manner as above, a delay effect is added to the control signal of the address generation circuit 4, and the screen is displayed as shown in FIG. 2C.

そして、このタイミング遅延回路5により画面の映出す
る部分を自由に切り換えることが可能である1通常は第
2図Bのパターンで十分であるが。
The timing delay circuit 5 allows the displayed portion of the screen to be freely switched. Normally, the pattern shown in FIG. 2B is sufficient.

画面左端から右端まで自由に映出する部分が瞬時に切り
換えられれば、高品位テレビジョン信号の全ての情報を
見ることができる。
If the portion of the screen that is displayed freely from the left edge to the right edge can be switched instantly, all information in the high-definition television signal can be viewed.

以上のように1本実施例によれば、アドレス発生回路4
のタイミングを遅延させるだけで簡単に高品位テレビジ
3ン画像の映出範囲を切り換えることができ、従来の欠
落した情報を補うことができる。
As described above, according to this embodiment, the address generation circuit 4
By simply delaying the timing, the display range of high-definition television images can be easily changed, and information missing in the conventional system can be compensated for.

(発明の効果) 以上のように、本発明によれば、メモリ回路を制御する
アドレス発生回路のタイミングを遅延させるだけで簡単
に高品位テレビジョン信号を標準テレビジョン信号に映
出する際の映出範囲を自由に切り換えることができ、従
来では欠落してしまっていた画面両端まで情報を見るこ
とができる。
(Effects of the Invention) As described above, according to the present invention, it is possible to easily convert a high-definition television signal into a standard television signal by simply delaying the timing of the address generation circuit that controls the memory circuit. The output range can be changed freely, and information can be seen at both ends of the screen, which was previously missing.

【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におけるテレビジョン信号方
式変換装置のブロック図、第2図はその表示画面の例、
第3図は従来の表示画面の例、第4図は従来のテレビジ
ョン信号方式変換装置のブロック図である。 1.7・・・高品位テレビジョン信号入力端子、2.8
・・・走査線変換回路、  3,9・・・メモリ回路、
4.10・・・アドレス発生回路。 5・・・タイミング遅延回路、 6,11・・・変換信
号出力端子6 袷〆禍 特許出願人 松下電器産業株式会社 第 図 第 図
FIG. 1 is a block diagram of a television signal format conversion device according to an embodiment of the present invention, and FIG. 2 is an example of its display screen.
FIG. 3 is an example of a conventional display screen, and FIG. 4 is a block diagram of a conventional television signal format converter. 1.7...High-definition television signal input terminal, 2.8
...Scanning line conversion circuit, 3,9...Memory circuit,
4.10 Address generation circuit. 5... Timing delay circuit, 6, 11... Converted signal output terminal 6 Patent applicant: Matsushita Electric Industrial Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 高品位テレビジョン信号を入力信号とする高品位テレビ
ジョン信号入力端子と、該入力端子に接続され、高品位
テレビジョン信号の走査線数を標準テレビジョン信号の
走査線数に変換する走査線変換回路と、該走査線変換回
路の出力を記憶するメモリ回路と、該メモリ回路を制御
するアドレス発生回路と、該アドレス発生回路の出力で
ある制御信号を遅延させて画面を左右に移動させるタイ
ミング遅延回路と、上記メモリ回路の出力に接続された
変換信号出力端子とを備え、映像画面を左右方向に移動
することができるテレビジョン信号方式変換装置。
A high-definition television signal input terminal that receives a high-definition television signal as an input signal, and a scanning line converter that is connected to the input terminal and converts the number of scanning lines of the high-definition television signal to the number of scanning lines of a standard television signal. a circuit, a memory circuit that stores the output of the scanning line conversion circuit, an address generation circuit that controls the memory circuit, and a timing delay that delays the control signal that is the output of the address generation circuit to move the screen left and right. What is claimed is: 1. A television signal format conversion device, comprising a circuit and a conversion signal output terminal connected to the output of the memory circuit, and capable of moving a video screen in the left-right direction.
JP63201889A 1988-08-15 1988-08-15 Television signal system converter Pending JPH0251984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63201889A JPH0251984A (en) 1988-08-15 1988-08-15 Television signal system converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63201889A JPH0251984A (en) 1988-08-15 1988-08-15 Television signal system converter

Publications (1)

Publication Number Publication Date
JPH0251984A true JPH0251984A (en) 1990-02-21

Family

ID=16448513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63201889A Pending JPH0251984A (en) 1988-08-15 1988-08-15 Television signal system converter

Country Status (1)

Country Link
JP (1) JPH0251984A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500683A (en) * 1990-03-26 1996-03-19 Canon Kabushiki Kaisha Image display apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01292984A (en) * 1988-05-20 1989-11-27 Sony Corp System converter for video signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01292984A (en) * 1988-05-20 1989-11-27 Sony Corp System converter for video signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500683A (en) * 1990-03-26 1996-03-19 Canon Kabushiki Kaisha Image display apparatus
US5504536A (en) * 1990-03-26 1996-04-02 Canon Kabushiki Kaisha Image display apparatus
US6288751B1 (en) 1990-03-26 2001-09-11 Canon Kabushiki Kaisha Image display apparatus

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