JP2971481B2 - Method converter - Google Patents
Method converterInfo
- Publication number
- JP2971481B2 JP2971481B2 JP1186498A JP18649889A JP2971481B2 JP 2971481 B2 JP2971481 B2 JP 2971481B2 JP 1186498 A JP1186498 A JP 1186498A JP 18649889 A JP18649889 A JP 18649889A JP 2971481 B2 JP2971481 B2 JP 2971481B2
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- Japan
- Prior art keywords
- signal
- color
- circuit
- luminance
- line
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- Details Of Television Scanning (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はハイビジョンの放送方式として提案されてい
るアスペクト比16:9のMUSE信号を、現行525本方式の受
像機で見れるように方式変換する装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for converting a 16: 9 aspect ratio MUSE signal proposed as a high-definition broadcasting system so that it can be viewed on a current 525-line receiver. .
従来の技術 ハイビジョン信号のような広帯域映像信号を帯域圧縮
して伝送する方法の一つとして［MUSE方式］が提案（NH
K技術研究「MUSE方式の開発」第39巻 第２号昭和62
年）されている。またMUSE信号を現行受像機で見るため
の方式変換装置も提案されている。その詳細は、例えば
［MUSE−525本コンバータ」（S63電子情報通信学会春季
全国大会 Ｄ−169）に述べられている。この中で述べ
られている変換方式の実施例では、アスペクト比はハイ
ビジョンのワイドな画面の両サイドを切り捨てて、現行
受像機のアスペスト比4:3の画面全体に映出しようとす
るものである。また走査線数の変換は1125本からまず10
50本に変換した後、525本に変換するものである。2. Description of the Related Art [MUSE method] is proposed as one of the methods for transmitting a wideband video signal such as a high-definition video signal after compressing the band (NH
K Technology Research "Development of MUSE Method" Vol.39 No.2 Showa 62
Years). In addition, a system conversion device for viewing a MUSE signal with a current receiver has been proposed. The details are described in, for example, [MUSE-525 Converter] (S63 IEICE Spring National Convention D-169). In the embodiment of the conversion method described therein, the aspect ratio is to cut off both sides of the wide screen of the HDTV and to project the entire screen with the aspect ratio of 4: 3 of the current receiver. . In addition, the conversion of the number of scanning lines
After converting to 50, it is converted to 525.
発明が解決しようとする課題 しかしながら、上記のような方式変換装置では、送ら
れてきた信号の両サイドを切り捨ててしか表示出来ない
という問題点を有していた。Problems to be Solved by the Invention However, the above-described system conversion apparatus has a problem that the displayed signal can be displayed only by truncating both sides of the transmitted signal.
本発明はかかる点を鑑み、両サイドを切り捨てること
なく、送られてきたアスペクト比16:9のMUSE信号をその
ままのアスペクト比で現行525本方式の受像機に表示で
きる方式変換装置を提供することを目的とする。In view of the above, the present invention provides a system conversion device capable of displaying a transmitted MUSE signal having an aspect ratio of 16: 9 with the same aspect ratio on a current 525-line receiver without truncating both sides. With the goal.
課題を解決するための手段 本発明は525本方式に間引くために生ずる歪を除くプ
リフィルタと、MUSE信号の３本の走査線から１本に間引
く回路と、MUSE信号から525本方式に時間軸変換する回
路と、線順次で送られてきた２つの色信号を同時信号に
変換する回路とを備えた方式変換装置である。Means for Solving the Problems The present invention provides a pre-filter for eliminating distortion caused by thinning out to 525 lines, a circuit for thinning out three lines of a MUSE signal to one line, and a time axis of 525 lines from a MUSE signal. This is a system conversion device including a circuit for converting and a circuit for converting two color signals sent line-sequentially into a simultaneous signal.
作用 本発明は前記した構成より、1/3に間引く回路で走査
線数1125本のMUSE信号を375本に間引き、時間軸変換回
路で525本方式に時間軸変換して現行525本方式の受像機
にMUSE信号を16:9のアスペクト比で表示しようとするも
のである。Operation The present invention reduces the number of MUSE signals of 1125 scanning lines to 375 with a circuit for thinning out to 1/3 from the above-described configuration, converts the time axis to 525 with a time axis conversion circuit, and receives the current 525-line image. It is intended to display a MUSE signal on a computer with an aspect ratio of 16: 9.
実施例 本発明の実施例について以下に図面を用いて説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
MUSE信号の信号形式については前記文献［MUSE方式」
に詳細に述べられているが、２つの色信号Ｒ−Ｙ、Ｂ−
Ｙ信号は1/4に時間軸圧縮され、線順次で輝度信号と時
間軸多重して伝送される。さらに色信号は輝度信号に対
して４水平走査期間（4H）先行して伝送されるが、本発
明の本質には関係がないので、理解を容易にするために
以下の説明では4Hの先行はないものとして説明する。For the signal format of the MUSE signal, refer to the above document [MUSE method].
Described in detail, two color signals RY and B-
The Y signal is time-axis-compressed to 1/4 and transmitted in a time-division multiplexed with the luminance signal in a line-sequential manner. Further, the chrominance signal is transmitted four horizontal scanning periods (4H) ahead of the luminance signal. However, since it is not relevant to the essence of the present invention, in order to facilitate understanding, the precedence of 4H is used in the following description. Explain as if there is no.
走査線数525本、アスペクト比4:3（16:12）の現行受
像機にアスペクト比16:9の信号を表示するには525×９
÷12≒394の走査線数で表示すればよい。しかし、走査
線数1125本から394本に変換するには走査線数を1/2.855
に減らす必要がある。そこで本発明は実現の容易さから
第３図に示すように走査線数を簡単な比率の1/3の375本
に間引き、上下に75本ずつの非表示部を設け、アスペク
ト比4:3の現行受像機の表示部にアスペクト比16:9で表
示しようとするものである。525 x 9 to display a 16: 9 aspect ratio signal on a current receiver with 525 scanning lines and 4: 3 (16:12) aspect ratio
What is necessary is just to display by the number of scanning lines of {12} 394. However, to convert from 1125 scanning lines to 394 scanning lines, reduce the number of scanning lines to 1 / 2.855.
Need to be reduced to Therefore, the present invention thins out the number of scanning lines to 1/3 of a simple ratio of 375 lines as shown in FIG. 3 for ease of realization, and provides 75 non-display parts at the top and bottom, and an aspect ratio of 4: 3. Is intended to be displayed at an aspect ratio of 16: 9 on the display unit of the current receiver.
第１図は本発明の一実施例における方式変換装置のブ
ロック構成図である。第１図において１は入力端、２は
信号を1/3に間引く時に生ずる歪を除くプリフィルタ、
３は線順次で伝送されてきた色信号を２種類の同時色信
号に復元するデコード回路、４、５は信号を２本おきに
抜き取る抜取回路、６は輝度信号の時間軸変換を行なう
輝度走査線変換回路、７は色信号の時間軸変換を行なう
色走査変換回路、８はデジタル信号をアナログ信号に変
換するD/A変換器、９は輝度信号の出力端、10、11は色
信号の出力端である。FIG. 1 is a block diagram of a system conversion apparatus according to an embodiment of the present invention. In FIG. 1, 1 is an input terminal, 2 is a pre-filter for removing a distortion generated when the signal is thinned to 1/3,
Reference numeral 3 denotes a decoding circuit for restoring a color signal transmitted line-sequentially to two types of simultaneous color signals, reference numeral 4 denotes a sampling circuit for extracting every other signal, and reference numeral 6 denotes a luminance scan for converting a luminance signal into a time axis. A line conversion circuit, 7 is a color scan conversion circuit for converting a color signal on a time axis, 8 is a D / A converter for converting a digital signal into an analog signal, 9 is an output terminal of a luminance signal, and 10 and 11 are color signal output terminals. Output end.
以上のように構成された本実施例の方式変換装置にお
いて、走査線を1/3に間引く間引き方は、第４図に示す
ように輝度信号（Y1、Y2、Y3…）は２本おきに選択して
1/3に間引き、色信号（C1、C2、C3…）は線順次で伝送
されてきた全色信号を用いて同時信号に変換した後、各
々の色信号を輝度信号と同様２本おきに選択して1/3に
間引こうとするものである。なお色信号の添え字の奇数
番号はＲ−Ｙ信号を、偶数番号はＢ−Ｙ信号を表わすも
のとする。In the method conversion apparatus of this embodiment configured as described above, the method of thinning out the scanning lines to 1/3 is such that the luminance signals (Y 1 , Y 2 , Y 3 ...) Are 2 as shown in FIG. Select every other book
The color signals (C 1 , C 2 , C 3 ...) Are converted to simultaneous signals using all the color signals transmitted in a line-sequential manner, and each color signal is converted to a 2 It is intended to select every other book and thin out to 1/3. The odd numbers of the suffixes of the color signals represent the RY signal, and the even numbers represent the BY signal.
次にその動作を説明する。入力端１にはA/D変換器
（図示せず）でデジタル信号に変換されたMUSE信号の映
像信号が到来する。プリフィルタ２で走査線数を1/3に
間引くことによって生じる歪が除かれる。歪が除かれた
映像信号のうち時間軸多重された輝度信号Ｙは抜取回路
４に送られ、第４図に示すように例えばY1,Y4,Y7…と２
本おきに抜き取られる。1/3に間引かれた375本の輝度信
号は記憶素子で構成された輝度走査変換回路６でMUSEの
走査から525本方式の走査に時間軸変換される。輝度走
査変換回路６ではMUSE信号の１水平走査時間を525本方
式の１水平走査時間に変換する水平時間軸変換を行なう
とともに、第３図に示すように走査線数375本で画面を
構成するために、垂直周期の適当な時刻に連続して読み
出す垂直連続読み出し変換を行なっている。Next, the operation will be described. A video signal of a MUSE signal converted into a digital signal by an A / D converter (not shown) arrives at the input terminal 1. The distortion caused by thinning out the number of scanning lines to 1/3 by the pre-filter 2 is eliminated. The time-division-multiplexed luminance signal Y of the video signal from which the distortion has been removed is sent to the sampling circuit 4 and, for example, Y1, Y4, Y7.
It is extracted every other book. The 375 luminance signals thinned out to 1/3 are time-converted from MUSE scanning to 525-line scanning by a luminance scanning conversion circuit 6 composed of storage elements. The luminance scan conversion circuit 6 performs horizontal time axis conversion for converting one horizontal scanning time of the MUSE signal to one horizontal scanning time of 525 lines, and forms a screen with 375 scanning lines as shown in FIG. For this purpose, vertical continuous read conversion is performed in which data is read continuously at appropriate times in the vertical cycle.
線順次時間軸多重された色信号は色デコード回路３で
２つの同時信号に復元される。MUSEの色信号は前述した
ように、２つの色差信号Ｒ−Y,B−Ｙが交互に送られて
くる。その為、輝度信号と同じように２本おきに抜き取
ったのではどちらか一方の色信号しか復元できない。そ
こで本発明では第４図に示すように送られてきた全部の
色信号を用いて復元しようとするものである。今仮に輝
度信号としてY4を抜き取ったとすると、Ｂ−Ｙ信号はは
同一走査線で送られてきたC4を、Ｒ−Ｙ信号は前後の走
査線で送られてきたC3、C5の平均で復元しようとするも
のである。The color signals time-division multiplexed in a line-sequential manner are restored by the color decoding circuit 3 into two simultaneous signals. As described above, two color difference signals RY and BY are alternately sent to the MUSE color signal. Therefore, if every third line is extracted as in the case of the luminance signal, only one of the color signals can be restored. Therefore, in the present invention, as shown in FIG. 4, restoration is performed using all the color signals sent. If Y 4 is extracted as a luminance signal, the BY signal is C 4 transmitted on the same scanning line, and the RY signal is C 3 and C 5 transmitted on the preceding and succeeding scanning lines. They try to restore on average.
色デコード回路３は第５図に示すように１水平走査期
間（1H）遅延回路71、72と、加算回路73と、信号の大き
さを1/2にする1/2回路74と、切替回路75で構成されてい
る。端子70に到来した信号（0H）は1H遅延回路71で色信
号のみ1H遅延（1H）させられ、1H遅延回路72でさらに1H
遅延（2H）させられる。加算回路73で0H信号と2H信号を
加算し、1/2回路74で信号の大きさを1/2にすると、線路
78に平均化されたＲ−Ｙ信号と、Ｂ−Ｙ信号が交互に得
られる。1H遅延回路71の出力の線路79にはこれとは反対
のＢ−Ｙ信号と、Ｒ−Ｙ信号が交互に得られる。切替回
路75で1Hごとに実線で表わした接続と、点線で表わした
接続に切り換えると端子76にＲ−Ｙ信号が、端子77にＢ
−Ｙ信号が連続して得られ、２つの同時色信号が復元さ
れる。As shown in FIG. 5, the color decoding circuit 3 includes one horizontal scanning period (1H) delay circuits 71 and 72, an addition circuit 73, a 1/2 circuit 74 for reducing the signal size to 1/2, and a switching circuit. Consists of 75. The signal (0H) arriving at the terminal 70 is delayed by 1H (1H) only for the color signal by the 1H delay circuit 71, and further delayed by 1H by the 1H delay circuit 72.
Delayed (2H). When the 0H signal and the 2H signal are added by the adder circuit 73 and the signal size is halved by the 1/2 circuit 74, the line
An RY signal and a BY signal averaged to 78 are obtained alternately. On the output line 79 of the 1H delay circuit 71, an opposite BY signal and an RY signal are alternately obtained. When the switching circuit 75 switches between the connection represented by the solid line and the connection represented by the dotted line every 1H, the RY signal is supplied to the terminal 76, and the B signal is supplied to the terminal 77.
The −Y signal is obtained continuously, and the two simultaneous color signals are restored.
２つの同時信号に復元された色信号は抜取回路５で各
々３本から１本に抜き取られ、記憶素子で構成された色
走査変換回路７に送られる。1/3に間引かれた375本づつ
の２種類の色信号は色走査変換回路７でMUSEの走査から
525本方式の走査に時間軸変換される。色信号は時間軸
多重を行なうために1/4に時間軸圧縮されているので、
水平時間軸変換が行なわれるとともに,1/4に時間軸圧縮
された分も伸張されて読みだされる。さらに輝度信号と
同様に垂直連続読出変換も行なわれる。The color signals restored to the two simultaneous signals are extracted from three to one by the extraction circuit 5, respectively, and sent to the color scanning conversion circuit 7 composed of storage elements. The two types of color signals of 375 lines each decimated to 1/3 are converted from the MUSE scan by the color scan conversion circuit 7.
The time axis is converted to 525-line scanning. Since the color signal is time-axis compressed to 1/4 to perform time-axis multiplexing,
The horizontal time axis conversion is performed, and the time axis compressed by 1/4 is expanded and read. Further, vertical continuous read conversion is performed similarly to the luminance signal.
525方式に変換された輝度信号と２つの色信号はD/A変
換器６でデジタル信号からアナログ信号に変換され、出
力端９には525本方式に変換され、アスペクト比16:9の
輝度信号が、出力端10、11には525本方式に変換され、
アスペクト比16:9の２種類の色信号が得られる 以上説明したように、本実施例によれば伝送されてき
たアスペクト比16:9のMUSE信号をアスペクト比16:9のま
まで現行525本方式の受像機に表示でき、更に色信号は
送られてきた全信号を用いて復元するので、画質の良い
映像が表示できる。The luminance signal and the two color signals converted into the 525 format are converted from a digital signal into an analog signal by the D / A converter 6, and the output terminal 9 is converted into the 525-line format, and the luminance signal having an aspect ratio of 16: 9 is output. However, the output terminals 10 and 11 are converted to a 525-line system,
As described above, according to the present embodiment, the currently used MUSE signal having the aspect ratio of 16: 9 is converted to the current 525 signals while maintaining the aspect ratio of 16: 9. Since the image can be displayed on an image receiver, and the color signal is restored using all the transmitted signals, a high quality image can be displayed.
第２図は本発明の第２の実施例を示す方式変換装置で
ある。同図において第１図と同様な動作をするものには
同じ番号をつけ説明は省略する。21は輝度信号を1/3に
間引くとともに、MUSEの走査から525本方式の走査に時
間軸変換する輝度間引回路、22は垂直読出変換回路、23
は時間軸多重するために1/4に時間軸圧縮された色信号
を元の時間軸に復元するための色伸張回路、24は走査変
換回路である。FIG. 2 shows a system converter according to a second embodiment of the present invention. In the figure, the same operations as those in FIG. 1 are denoted by the same reference numerals, and the description is omitted. Reference numeral 21 denotes a luminance thinning-out circuit for thinning out the luminance signal to 1/3 and converting the time axis from MUSE scanning to 525-line scanning, 22 a vertical readout conversion circuit, and 23
Is a color expansion circuit for restoring the color signal compressed on the time axis to 1/4 for time axis multiplexing to the original time axis, and 24 is a scan conversion circuit.
以上のように構成された第２の実施例の方式変換装置
について、以下その動作を説明する。記憶素子で構成さ
れた輝度間引回路21では輝度信号が２本おきに書き込ま
れ、MUSEの走査から525本方式の走査に水平時間軸変換
されて読みだされる。水平時間軸変換された輝度信号は
垂直読出変換回路22で垂直連続読み出し変換が行なわれ
る。The operation of the system converter of the second embodiment configured as described above will be described below. In the luminance thinning circuit 21 composed of a storage element, a luminance signal is written every two lines, and the horizontal time axis is converted from the MUSE scan to the 525-line scan and read. The vertical readout conversion circuit 22 performs vertical continuous readout conversion on the luminance signal subjected to the horizontal time axis conversion.
色伸張回路23は記憶素子で構成されており、時間軸多
重された色信号が読み込まれ、４倍に時間軸伸張されて
読みだされる。４倍に時間軸伸張された色信号は色デコ
ード回路３で線順次信号から２つの同時色信号に変換さ
れ、抜取回路５で各々の色信号は２本おきに抜き取られ
る。抜き取られた２つの色信号は走査変換回路24でMUSE
の走査から525本方式の走査に水平時間軸変換されると
ともに、垂直連続読み出し変換される。The color expansion circuit 23 is composed of a storage element, and reads out the color signals multiplexed on the time axis, expands the time axis by a factor of four, and reads them. The color signal expanded on the time axis by a factor of four is converted from a line sequential signal into two simultaneous color signals by a color decoding circuit 3, and each of the color signals is extracted by a sampling circuit 5 every two lines. The extracted two color signals are converted by the scan conversion circuit 24 into MUSE signals.
Is converted from horizontal scanning to horizontal scanning on the basis of the 525-line system, and vertical continuous reading conversion is performed.
以上の様に本実施例によれば輝度間引回路21を記憶素
子で構成し、色伸張回路23を色デコード回路３の前に設
けることにより、以降の回路の動作速度を低速化するこ
とができ、動作の安定化がはかれるとともに、低速の安
価な素子で構成出来る。As described above, according to the present embodiment, the luminance thinning circuit 21 is constituted by a storage element, and the color expansion circuit 23 is provided before the color decoding circuit 3, so that the operation speed of the subsequent circuits can be reduced. As a result, the operation can be stabilized, and a low-speed and inexpensive element can be used.
第６図は本発明の第３の実施例における方式変換装置
のブロック構成図である。第６図において33は１水平期
間（1H）遅延回路、34はMUSE信号の輝度信号と色信号を
同時に２本おきに抜き取るY.C抜取回路、35はMUSE信号
の色信号のみを２本おきに抜き取るＣ抜取回路、36は線
順次で交互に伝送されてきた色信号を２種類の連続した
色信号に並べ替える色デコードSW、である。FIG. 6 is a block diagram of a system conversion apparatus according to a third embodiment of the present invention. In FIG. 6, reference numeral 33 denotes a one-horizontal period (1H) delay circuit, reference numeral 34 denotes a YC extraction circuit which simultaneously extracts the luminance signal and color signal of the MUSE signal every three lines, and reference numeral 35 extracts only the color signal of the MUSE signal every two lines. A C sampling circuit 36 is a color decoder SW for rearranging color signals transmitted alternately in line sequence into two types of continuous color signals.
以上のように構成された本実施例の方式変換装置にお
いて、間引きかたは、第７図に示すように２本おきに選
択した輝度信号（Y1,Y4,Y7…）と色信号（C1,C4,C7…）
と、次の走査線の色信号（C2,C5,C8…）とを選択しよう
とするものである。In the method conversion apparatus of the present embodiment configured as described above, the thinning method is such that the luminance signal (Y 1 , Y 4 , Y 7 ...) And the chrominance signal (C 1 , C 4 , C 7 …)
And the color signals (C 2 , C 5 , C 8 ...) Of the next scanning line.
以下にその動作を説明する。入力端１にはA/D変換器
（図示せず）でデジタル信号に変換されたMUSE信号の映
像信号が到来する。プリフィルタ２で走査線数を1/3に
間引くことによって生じる歪が除かれる。プリフィルタ
２の出力信号（第８図ａ）の一方は1H遅延回路33に、も
う一方はＣ抜取回路35に送られる。1H遅延回路33で１水
平期間遅延した信号（ｂ）はY.C抜取り回路34で２本お
き輝度信号と色信号が一緒に抜き取られる（ｃ）。同時
にＣ抜取回路35では色信号のみが２本おきに抜き取られ
る（ｄ）。Y.C抜取回路34で1/3に間引かれたうちの輝度
信号は記憶素子で構成された輝度走査変換回路６でMUSE
の走査から525本方式の走査に時間軸変換される。輝度
走査変換回路６ではMUSE信号に１水平走査時間を525本
方式の１水平走査時間に変換すると水平時間軸変換を行
なうとともに、第３図に示すように走査線数375本で画
面を構成するために、垂直周期の適当な時刻に連続して
読みだす垂直連続読み出し変換が行なわれる。The operation will be described below. A video signal of a MUSE signal converted into a digital signal by an A / D converter (not shown) arrives at the input terminal 1. The distortion caused by thinning out the number of scanning lines to 1/3 by the pre-filter 2 is eliminated. One of the output signals of the prefilter 2 (FIG. 8a) is sent to the 1H delay circuit 33 and the other is sent to the C sampling circuit 35. From the signal (b) delayed by one horizontal period by the 1H delay circuit 33, a luminance signal and a chrominance signal are extracted together at every third line by the YC extraction circuit 34 (c). At the same time, only the color signal is extracted every two lines in the C extraction circuit 35 (d). The luminance signal that has been thinned out to 1/3 by the YC sampling circuit 34 is converted to a MUSE signal by the luminance scan conversion circuit 6 composed of storage elements.
Is converted to a 525-line scan on a time axis. In the luminance scan conversion circuit 6, when one horizontal scanning time is converted into one 525 horizontal scanning time in the MUSE signal, horizontal time axis conversion is performed, and a screen is constituted by 375 scanning lines as shown in FIG. For this purpose, vertical continuous read conversion for continuously reading at an appropriate time in the vertical cycle is performed.
MUSEの色信号は前述したように、２つの色差信号Ｒ−
Y,B−Ｙが交互に送られてくる。そのため、２本おきに
抜き取ったのではどちらか一方の色信号しか得られな
い。即ち線路13にはＲ−Y,B−Y,R−Ｒ……の信号が、線
路14には逆のＢ−Y,R−Y,B−Ｙ……の信号が得られる。
そこで色デコードSW36で並び替えを行なう。色デコード
SW36のスイッチを実線で示した位置と点線で示した位置
とを3H周期で切り換えると、線路15には連続した色差信
号Ｒ−Ｙが、線路16には連続した色差信号Ｂ−Ｙが得ら
れる。As described above, the color signals of MUSE are two color difference signals R-
Y and BY are sent alternately. Therefore, if every third line is extracted, only one of the color signals can be obtained. That is, a signal of RY, BY, RR,... Is obtained on the line 13, and a signal of reverse BY, RY, BY,.
Therefore, rearrangement is performed by the color decoder SW36. Color decoding
When the switch of SW36 is switched between the position indicated by the solid line and the position indicated by the dotted line at a 3H cycle, a continuous color difference signal RY is obtained on the line 15 and a continuous color difference signal BY is obtained on the line 16. .
色デコードSW36で２つの連続した色差信号に復元され
た色信号は、記憶素子で構成された色走査変換回路７に
送られ、MUSEの走査から525本方式の走査に時間軸変換
される。色信号は時間軸多重を行なうために1/4に時間
軸圧縮されているので、水平時間軸変換が行なわれると
ともに、1/4に時間軸圧縮された分も伸張されて読みだ
される。さらに輝度信号と同様に垂直連続読み出し変換
も行なわれる。The color signal restored to two continuous color difference signals by the color decoding SW 36 is sent to a color scan conversion circuit 7 composed of a storage element, and is converted from MUSE scan to 525-line scan time base. Since the color signal is time-axis-compressed to 1/4 in order to perform time-axis multiplexing, horizontal time-axis conversion is performed, and the time-axis-compressed portion is expanded and read out. In addition, vertical continuous read conversion is performed in the same manner as the luminance signal.
525方式に変換された輝度信号の２つの色信号はD/A変
換器８でデジタル信号からアナログ信号に変換され、出
力端９には525本方式に変換され、アスペクト比16:9の
輝度信号が、出力端10、11には525本方式に変換され、
アスペクト比16:9の２種類の色信号が得られる なお第６図のY.C抜取回路34と前に配置された1H遅延
回路33をＣ抜取回路35の前に配置しても、輝度信号を抜
き取った前の走査線の色信号を用いるだけで、本実施例
と同様の効果が得られることは明かである。The two color signals of the luminance signal converted to the 525 system are converted from a digital signal to an analog signal by the D / A converter 8, and the output terminal 9 is converted to the 525 system, and the luminance signal having an aspect ratio of 16: 9. However, the output terminals 10 and 11 are converted to a 525-line system,
Two types of color signals having an aspect ratio of 16: 9 can be obtained. Even if the YC extraction circuit 34 and the 1H delay circuit 33 disposed in front of the YC extraction circuit 34 in FIG. It is apparent that the same effect as in the present embodiment can be obtained only by using the color signal of the previous scanning line.
以上説明したように、本実施例によれば２つの色信号
のうち、１つは抜き取った輝度信号と同じ走査線の色信
号、他の１つはその前、または後の走査線の色信号を用
いている。その結果、輝度信号と色信号の空間距離が短
く、画質の良い映像が得られる。As described above, according to this embodiment, of the two color signals, one is the color signal of the same scanning line as the extracted luminance signal, and the other is the color signal of the preceding or subsequent scanning line. Is used. As a result, a spatial distance between the luminance signal and the chrominance signal is short, and an image with good image quality can be obtained.
発明の効果 以上説明したように、本発明によれば伝送されてきた
アスペクト比16:9のMUSE信号をアスペクト比16:9のまま
で現行525本方式の受像機に表示でき、その実用的効果
は大きい。Effect of the Invention As described above, according to the present invention, a transmitted MUSE signal having an aspect ratio of 16: 9 can be displayed on a current 525-line receiver without changing the aspect ratio of 16: 9. Is big.
第１図は本発明における一実施例の方式変換装置のブロ
ック図、第２図は本発明の他の実施例の方式変換装置の
ブロック図、第３図は表示方法を説明する図、第４図は
信号の間引き方法を説明する図、第５図は色デコード回
路のブロック図であ 第６図は本発明における他の実施例の方式変換装置のブ
ロック図、第７図は信号の間引き方法を説明する図、第
８図は抜取り動作説明図である。 １……入力端、２……プリフィルタ、３……色デコード
回路、４、５……抜取回路、６……輝度走査変換回路、
７……色走査変換回路、８……D/A変換器、９……輝度
信号出力端、10、11……色信号出力端、21……輝度間引
回路、22……垂直読出変換回路、23……色伸張回路、24
……走査変換回路、71、72……1H遅延回路、73……加算
回路、74……1/2回路、75……切替回路、33……１水平
走査期間遅延回路、34……Y.C抜取り回路、35……Ｃ抜
取り回路、36……色デコードSW。FIG. 1 is a block diagram of a system converter according to one embodiment of the present invention, FIG. 2 is a block diagram of a system converter of another embodiment of the present invention, FIG. FIG. 5 is a diagram for explaining a signal decimation method, FIG. 5 is a block diagram of a color decoding circuit, FIG. 6 is a block diagram of a system conversion device according to another embodiment of the present invention, and FIG. FIG. 8 is an explanatory view of the extracting operation. 1 input terminal 2 prefilter 3 color decoding circuit 4 5 extraction circuit 6 luminance scan conversion circuit
7: color scan conversion circuit, 8: D / A converter, 9: luminance signal output terminal, 10, 11 ... color signal output terminal, 21: luminance thinning circuit, 22: vertical readout conversion circuit , 23 ... Color expansion circuit, 24
…… Scan conversion circuit, 71, 72… 1H delay circuit, 73… Addition circuit, 74… 1/2 circuit, 75… Switching circuit, 33… 1 horizontal scanning period delay circuit, 34… YC sampling Circuit, 35 ... C sampling circuit, 36 ... Color decode SW.
フロントページの続き (72)発明者 古賀 豊勝 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 浜田 雅則 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (72)発明者 二宮 佑一 東京都世田谷区砧１丁目10番11号 日本 放送協会放送技術研究所内 (72)発明者 和泉 ▲吉▼則 東京都世田谷区砧１丁目10番11号 日本 放送協会放送技術研究所内 (56)参考文献 特開 平２−92185（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H04N 11/00 - 11/24 Continued on the front page (72) Inventor Toyokatsu Koga 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. Inventor Yuichi Ninomiya 1-10-11 Kinuta, Setagaya-ku, Tokyo Japan Broadcasting Corporation Research Institute of Broadcasting Technology (56) References JP-A-2-92185 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H04N 11/00-11/24
Claims (3)
歪を除くためのプリフィルタと、輝度信号を1/3に間引
く抜取回路と、線順次で伝送されてくる色信号を２つの
同時色信号に復元する色デコード回路と、復元された色
信号を1/3に間引く抜取回路と、輝度信号をMUSE信号形
式から525本方式に時間軸変換する輝度走査変換回路
と、色信号をMUSE信号形式から525本方式に時間軸変換
する色走査変換回路とを備えたことを特徴とする方式変
換装置。1. A pre-filter for removing distortion caused by thinning out the number of scanning lines to 1/3, a sampling circuit for thinning out a luminance signal to 1/3, and a color signal transmitted line-sequentially by two. A color decoding circuit for restoring to a simultaneous color signal, a sampling circuit for thinning out the restored color signal to 1/3, a luminance scanning conversion circuit for converting the luminance signal from the MUSE signal format to the 525-line method on a time axis, and A method conversion device comprising: a color scanning conversion circuit for converting a MUSE signal format to a 525-line method on a time axis.
歪を除くためのプリフィルタと、記憶素子で構成された
輝度信号を1/3に間引く輝度間引き回路と、間引かれた
輝度信号の垂直連続読み出し変換を行なう垂直読出変換
回路と、色信号を４倍に時間軸伸張する色伸張回路と、
線順次で伝送されてくる色信号を２つの同時色信号に復
元する色デコード回路と、復元された色信号を1/3に間
引く抜取回路と、色信号を525本方式に時間軸変換する
走査変換回路とを備えたことを特徴とする方式変換装
置。2. A pre-filter for eliminating distortion caused by thinning out the number of scanning lines to 1/3, a luminance thinning-out circuit constituted by storage elements for thinning out a luminance signal to 1/3, and a thinned-out luminance A vertical read conversion circuit that performs vertical continuous read conversion of a signal, a color expansion circuit that expands a color signal by four times on a time axis,
A color decoding circuit for restoring a color signal transmitted line-sequentially to two simultaneous color signals, a sampling circuit for thinning out the restored color signal to 1/3, and a scan for converting the color signal into a 525-line system on a time axis A system conversion device comprising a conversion circuit.
歪を除くためのプリフィルタと、１水平走査期間遅延回
路と、輝度信号と色信号を同時に抜き取るY.C抜取回路
と、色信号のみを抜き取るＣ抜取回路と、線順次で交互
に伝送されてくる色信号を２種類の連続した色信号に並
び替える色デコードSWと、輝度信号をMUSE信号形式から
525本方式に時間軸変換する輝度走査変換回路と、色信
号をMUSE信号形式から525本方式に時間軸変換する色走
査変換回路とを備えたことを特徴とする方式変換装置。3. A pre-filter for removing distortion caused by thinning out the number of scanning lines to 1/3, a one horizontal scanning period delay circuit, a YC extraction circuit for simultaneously extracting a luminance signal and a color signal, and only a color signal. C extraction circuit, a color decoding switch that rearranges color signals transmitted alternately in line sequence into two types of continuous color signals, and a luminance signal from the MUSE signal format.
A system conversion device comprising: a luminance scan conversion circuit for performing time axis conversion to a 525 line system; and a color scan conversion circuit for converting a color signal from a MUSE signal format to a 525 line time base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186498A JP2971481B2 (en) | 1989-07-19 | 1989-07-19 | Method converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1186498A JP2971481B2 (en) | 1989-07-19 | 1989-07-19 | Method converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0350988A JPH0350988A (en) | 1991-03-05 |
| JP2971481B2 true JP2971481B2 (en) | 1999-11-08 |
Family
ID=16189542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1186498A Expired - Fee Related JP2971481B2 (en) | 1989-07-19 | 1989-07-19 | Method converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2971481B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992008323A1 (en) * | 1990-10-31 | 1992-05-14 | Matsushita Electric Industrial Co., Ltd. | Television system converter |
| KR0146695B1 (en) * | 1991-09-30 | 1998-09-15 | 강진구 | Transfer method of television signal and its apparatus |
| JPH0779582A (en) * | 1993-09-09 | 1995-03-20 | Toshiba Corp | Optically driven motor |
| JP4757271B2 (en) * | 2008-03-07 | 2011-08-24 | 則雄 宮内 | Brushless DC motor having a secondary power source and method for charging and driving the same |
-
1989
- 1989-07-19 JP JP1186498A patent/JP2971481B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0350988A (en) | 1991-03-05 |
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