JPS6393285A - Method and device recording and reproducing multiplex information signal - Google Patents
Method and device recording and reproducing multiplex information signalInfo
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- JPS6393285A JPS6393285A JP61239823A JP23982386A JPS6393285A JP S6393285 A JPS6393285 A JP S6393285A JP 61239823 A JP61239823 A JP 61239823A JP 23982386 A JP23982386 A JP 23982386A JP S6393285 A JPS6393285 A JP S6393285A
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は多重化情報信号記録再生方法及びその装置に係
り、特にカラー映像信号と容重信号とを多重化して記録
媒体に記録し、これを再生する多重化情報信号記録再生
方法及びその記８！装置と再生装置とに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multiplexed information signal recording and reproducing method and apparatus, and more particularly to a multiplexed information signal recording and reproducing method and apparatus for multiplexing a color video signal and a volumetric signal, recording the same on a recording medium, and reproducing the same. Multiplexed information signal recording and reproducing method and its notes 8! The present invention relates to a device and a playback device.
従来の技術
映像信号と音声信号とを記録媒体に記録し、これを再生
する場合、種々の多Φ化手段が用いられるが、その中の
一つの例として、例えば本出願人が先に特公昭５８−２
３９９８号公報（特願昭５２−２５２６２号）に開示し
た「情報信号記録方法」、特公昭５９−２９０３１＠公
報（特願昭５８−５５４１号）に開示した「情報信号記
録再生方法」、更には特公昭５９−２９０３２号公報（
特願昭５８−５５４２号）に開示した１情報信号再生装
置」が知られている。Conventional Technology When recording a video signal and an audio signal on a recording medium and reproducing them, various multi-Φ means are used. 58-2
"Information signal recording method" disclosed in Japanese Patent Publication No. 3998 (Japanese Patent Application No. 52-25262), "Information Signal Recording and Reproducing Method" disclosed in Japanese Patent Publication No. 59-29031 (Japanese Patent Application No. 58-5541), and is published in Special Publication No. 59-29032 (
"1 Information Signal Reproducing Apparatus" disclosed in Japanese Patent Application No. 58-5542) is known.
これらは、帯域制限された輝度信号と、低域変換搬送色
信号とを、帯域制限された輝度信号の高域周波数部分に
て帯域共用多重化し、更にこの帯域共用多重化信号に、
輝度信号の上限周波数よりも高い周波数の−又は二双上
の搬送波を音声信号で周波数変調（ＦＭ）Ｌ、て得たＦ
Ｍ音声信号を周波数分割多重し、この周波数分割多堕信
号で−の搬送波を周波数変調して１！７たＦＭ信号を記
録媒体に記録し、この記録媒体から再生したＦＭ信号を
記録時と逆の信号処理を行なって再生する方法。These band-limited luminance signals and low-pass converted carrier chrominance signals are band-shared multiplexed in the high frequency part of the band-limited luminance signal, and then added to this band-shared multiplexed signal.
F obtained by frequency modulating (FM) L with an audio signal on a carrier wave with a frequency higher than the upper limit frequency of the luminance signal.
The M audio signal is frequency-division multiplexed, the - carrier wave is frequency-modulated with this frequency-division multiplexed signal, the 1!7 FM signal is recorded on a recording medium, and the FM signal reproduced from this recording medium is reversely recorded. A method for performing signal processing and playback.
又は再生装置である。Or a playback device.
これらの本出願人が開示した記録方法、記録再生方法及
び再生装置によれば、比較的伝送系の歪が人であっても
、シングルキャリアであるという特性から復調映像信号
にビート妨害を生ずることなしに輝度信号、搬送色信号
及び−チャンネル又は二チャンネル以上の音声信号を同
一トラックに記録し、再生することができるほか、その
他種々の優れた特長を有する。According to the recording method, recording/playback method, and playback device disclosed by the present applicant, even if the transmission system is relatively distorted, beat interference will not occur in the demodulated video signal due to the single carrier characteristic. In addition to being able to record and reproduce a luminance signal, a carrier color signal, and a -channel or two or more channels of audio signals on the same track without using the same track, it also has various other excellent features.
このため、これらの本出願人の提案になる情報信号記録
方法により記録された、Ｖｌ−ＩＤ（登録商標）と呼ば
れる静電容量変化読取検出型ビデオディスク、及びこの
ビデオディスクから本出願人の提案になる情報信号再生
装置に基づいてカラーテレビジョン信号を復調再生する
ビデオディスク再生装置は現在実用に供され、一般に広
く普及している。For this reason, a capacitance change reading detection type video disc called Vl-ID (registered trademark) recorded using the information signal recording method proposed by the present applicant, and a video disc of a capacitance change reading detection type proposed by the present applicant from this video disc are used. A video disc playback device that demodulates and plays back a color television signal based on the information signal playback device of 2007 is currently in practical use and is widely used.
発明が解決しようとする問題点
ところで、このような方法で記録再生される情報信号の
うら、帯域制限された輝度信号の周波数帯域を、高解像
度化を目的として広げようと試みるとき、帯域ａ＋１１
限された輝度信号の上限周波数よりもすぐ近くの高周波
数位置に盲声キャリア（ＦＭ音声信＠）が存在するため
、上記の輝度信号の周波数帯域を広げるには、これらの
ＦＭ音声信号を初めから記録しないようにするか、又は
別の周波′数位置へ移動させれば良い。Problems to be Solved by the Invention Incidentally, when attempting to widen the frequency band of the band-limited luminance signal, which is the other side of the information signal recorded and reproduced by such a method, for the purpose of increasing the resolution, the frequency band of the band a+11
Since a blind voice carrier (FM voice signal@) exists at a high frequency position immediately near the upper limit frequency of the limited brightness signal, in order to widen the frequency band of the brightness signal mentioned above, it is necessary to Either it should not be recorded from that point on, or it should be moved to another frequency position.
しかしながら、この情報記録方法では記録された記録流
ビデオディスクやそのビデオディスク再生装置が既に大
田に存在する現在、これら既存の記録済ビデオディスク
との互換ｆ１を保つことを考慮すると、ＦＭ音声信号の
記録周波数位置を移動したり、ＦＭ音声信号自体の記録
を止めることはできない。However, with this information recording method, recorded recording stream video discs and video disc playback devices already exist in Ota, and considering the need to maintain compatibility f1 with these existing recorded video discs, it is difficult to record FM audio signals. It is not possible to move the recording frequency position or stop recording of the FM audio signal itself.
本発明は上記の点に鑑みて創作されたもので、既存の記
録済記録媒体を専用に再生する再生装置とのｒＬ換性を
保ちながら、映像信号を広帯域で記録再生し１７る多重
化情報信号記録再生方法及びその記録装置を提供するこ
とを目的とする。The present invention has been created in view of the above points, and is capable of recording and reproducing video signals in a wide band while maintaining rL compatibility with a reproducing apparatus that exclusively reproduces existing recorded recording media. An object of the present invention is to provide a signal recording/reproducing method and a recording device thereof.
問題点を解決するための手段
本発明の多重化情報信号記録再生方法は、映像信号など
の広帯域の第１の情報信号の所定周波数領域の信号成分
のみを一定レベル減衰した後、所定周波数領域に第１の
情報信号より狭帯域の第２の情報信号で搬送波を角度変
調して得た被角度変調波信号を多重し、これにより得ら
れた多重化情報信号を変調してから記録媒体に記録し、
再生時は上記記録媒体から再生及び復調して１ｇられた
再生多重化情報信号から上記被角度変調波信号を分離し
、この被角度変調波信号を再生多重化情報信号に略逆相
で加算することにより、前記第１の情報信号を取り出す
ようにしたものである。Means for Solving the Problems The multiplexed information signal recording and reproducing method of the present invention attenuates only the signal components in a predetermined frequency range of a broadband first information signal such as a video signal to a certain level, and then attenuates the signal components in a predetermined frequency range. Angle-modulated wave signals obtained by angle-modulating a carrier wave with a second information signal having a narrower band than the first information signal are multiplexed, and the resulting multiplexed information signal is modulated and then recorded on a recording medium. death,
During reproduction, the angle-modulated wave signal is separated from the reproduced multiplexed information signal obtained by reproducing and demodulating 1g from the recording medium, and this angle-modulated wave signal is added to the reproduced multiplexed information signal in substantially opposite phase. Accordingly, the first information signal is extracted.
また、本発明の多重化情報信号記録装置は、上記第１の
情報信号の所定周波数領域の信号成分のみを一定レベル
減衰する減衰手段と、上記多重化情報信号を生成する多
重手段と、記録手段とからなる。Further, the multiplexed information signal recording device of the present invention includes attenuation means for attenuating only signal components in a predetermined frequency region of the first information signal to a certain level, multiplexing means for generating the multiplexed information signal, and recording means. It consists of.
更に、本発明の多重化情報信号再生装置は、変調されて
記録されている上記多重化情報信号を記録済記録媒体か
ら再生及び復調して再生多小化情報悟りを得る復調手段
と、周波数選択手段と、再生多重化情報信号から前記Ｗ
Ｓ１の情報信号を分離出力する手段とからなる。Furthermore, the multiplexed information signal reproducing apparatus of the present invention includes a demodulating means for reproducing and demodulating the modulated and recorded multiplexed information signal from a recorded recording medium to obtain reproduced multiplexed information, and a frequency selection method. and means for extracting the W from the regenerated multiplexed information signal.
and means for separating and outputting the information signal of S1.
作用
本発明になる多重化情報信号記録再生方法は、映像信号
などの第１図（Ａ＞に示す如き周波数スペクトラムの広
帯域の第１の情報信号の所定周波数領域の信号成分のみ
を一定レベル減衰して第１図（［３）に示寸如ぎ周波数
スペクトラムの第１の情報信号を生成する。第１図（８
）中、ｆＭは上記所定周波数領域の中心周波数を示す。Function: The multiplexed information signal recording and reproducing method according to the present invention attenuates only signal components in a predetermined frequency region of a first information signal having a wide frequency spectrum as shown in FIG. 1 (A>) such as a video signal to a certain level. A first information signal having a frequency spectrum as shown in FIG. 1 ([3)] is generated.
), fM indicates the center frequency of the predetermined frequency range.
次に、第１の情報信号よりも狭帯域の第２の情報信号で
搬送波を角度変調して（ｑだ被角度変調波信号を、第１
図（Ｂ）に示した周波数スペクトラムの第１の情報４５
号の上記所定周波数領域に多重して第１図（Ｃ）に示づ
”如き周波数スペクトラムの多重化情報信号を生成する
。ここで、第１図（Ｃ）中、ｆＡｌ、ｆＭ２は夫々上記
被角度変調波信号の搬送波周波数を示す。被角度変調波
信号は第１図（Ｃ）で【、Ｌ２チャンネル分多徂されて
いるが、１又は３以上であってもよいことは勿論である
。Next, the carrier wave is angle-modulated with a second information signal having a narrower band than the first information signal (the angle-modulated wave signal is
First information 45 of the frequency spectrum shown in Figure (B)
A multiplexed information signal having a frequency spectrum as shown in FIG. 1(C) is generated by multiplexing the signal into the predetermined frequency region of the signal. The carrier wave frequency of the angle modulated wave signal is shown. In FIG.
次に、第１図（Ｃ）に示す周波数スペクトラムの多重化
情報信号で単一の搬送波を例えば周波数変調することに
より、第１図（Ｄ＞に示す如き周波数スペクトラムの被
変調多重化情報信号を生成し、この信号をディスクや磁
気テープなどの記録媒体に記録する。なお、第１図（Ｄ
＞中、ｆｃは搬送波中心周波数を示し、斜線部分は搬送
波−移帯域を示す。Next, by frequency modulating, for example, a single carrier wave with the multiplexed information signal having the frequency spectrum shown in FIG. 1(C), a modulated multiplexed information signal having the frequency spectrum shown in FIG. This signal is recorded on a recording medium such as a disk or magnetic tape.
>, fc indicates the carrier wave center frequency, and the shaded area indicates the carrier-transfer band.
次に再生時には上記記録媒体から再生された被変調多重
化情報信号を復調して第１図（Ｃ）に示す如き周波数ス
ペクトラムの再生多重化情報信号信号を得た後、その中
の被角度変調波１５号を、ｆＡｌ。Next, during reproduction, after demodulating the modulated multiplexed information signal reproduced from the recording medium to obtain a reproduced multiplexed information signal having a frequency spectrum as shown in FIG. Wave No. 15, fAl.
ｆＭ２を各々通過中心周波数とするフィルタにより夫々
分離する。しかる後に、この分離された被角度変調波信
号を、上記再生多重化情報信号に略逆相で加算すること
により、再生多重化情報信号中の被角度変調波信号が略
相殺除去され、第１図（［３）に示す如き周波数スペク
トラムの第１の情報信号が取り出される。They are separated by filters each having a passing center frequency of fM2. Thereafter, by adding this separated angle-modulated wave signal to the regenerative multiplexed information signal in substantially opposite phase, the angle-modulated wave signal in the regenerated multiplexed information signal is substantially canceled out, and the first A first information signal having a frequency spectrum as shown in Figure ([3)] is extracted.
本発明になる多重化情報信号記録装置【よ、本発明にな
る多重化情報信号記録（１■生方法中の記録方法を実現
するための装置で、まず減衰手段により第１図（Ｂ）に
示す如き周波数スペクトラムの第１の情報信号を１！７
る。この第１の情報信号のレベル減衰されている所定周
波数領域の中心周波数を第１図（Ｂ）に示す如＜ｆＭと
すると、減衰手段ｆＭにおいて６ｃ［（以上で、かつ、
２０．Ｅ以下の範囲内の減衰量でレベル減衰を行なう。A multiplexed information signal recording device according to the present invention [a device for realizing the multiplexed information signal recording method according to the present invention (1. The first information signal with the frequency spectrum as shown is 1!7
Ru. If the center frequency of the predetermined frequency range in which the level of the first information signal is attenuated is <fM as shown in FIG.
20. Level attenuation is performed with an attenuation amount within the range of E or less.
また、レベル減衰づ゛る第１の情報信号の所定周波数領
域を第１図（Ｂ）に示す如＜ＦＷとすると、上記減衰手
段は
ｆ Ｍ ／ ２ ＞ Ｆ Ｗ
なる関係を満足するレベル減衰を行なう。Further, if the predetermined frequency range of the first information signal whose level is attenuated is <FW as shown in FIG. Let's do it.
多重化情報信号再生装置は上記の減衰手段より取り出さ
れた第１の情報信号の所定周波数領域に、多重手段によ
り少なくとも前記被角度変調波信号を多重して第１図（
Ｃ）に示す如き周波数スペクトラムの多重化情報信号を
生成し、これを記録手段により更に変調した後記録媒体
に記録する。The multiplexed information signal reproducing device multiplexes at least the angle modulated wave signal by the multiplexing means onto a predetermined frequency region of the first information signal extracted from the attenuation means, as shown in FIG.
A multiplexed information signal having a frequency spectrum as shown in C) is generated, further modulated by a recording means, and then recorded on a recording medium.
また、本発明になる多重化情報信号再生装置は、本発明
になる多重化情報信号記録再生方法中の再生方法を実現
するだめの装置で、記録済記録媒体から再生した信号を
復調手段により第１図（Ｃ）に示す如き周波数スペクト
ラムの再生多重化情報信号を取り出し、周波数選択手段
により被角度変調波信号を分離出力し、分離手段により
上記復調手段から取り出された再生多重化信号に、上記
周波数選択手段よりの被角度変調波信号を略逆相にして
加ｔ１′１ｊることにより、分離手段より第１の情報信
号を取り出す構成としたものである。Further, the multiplexed information signal reproducing device according to the present invention is a device for realizing the reproducing method in the multiplexed information signal recording and reproducing method according to the present invention. 1. A regenerated multiplexed information signal having a frequency spectrum as shown in FIG. The first information signal is extracted from the separation means by adding the angle-modulated wave signal from the frequency selection means with a substantially opposite phase t1'1j.
従って、被角度変調波信号は再生多重化情報信号中から
周波数選択手段により取り出され、第１の情報信号は上
記分離手段により再生多重化信号中の被角度変調波信号
を相殺除去することにより取り出される。Therefore, the angle modulated wave signal is extracted from the reproduced multiplexed information signal by the frequency selection means, and the first information signal is extracted by canceling and removing the angle modulated wave signal from the reproduced multiplexed signal by the separating means. It will be done.
実施例
第２図は本発明方法の記録系及び記録装置の一実施例の
ブロック系統図を示す。同図中、入力９席子１に入来し
たＮＴＳＣ方式カラー映像信号はくし形フィルタ２に供
給され、ここで輝度信号と搬送色信号とに夫々分離され
る。くし形フィルタ２より取り出された輝度信号は、第
３図（Ａ＞にその周波数スペクトラムを示す如く、帯１
ｇ１Ｏ〜５．２ＭＨ７の広帯域信号であり、帯域Ｍ止フ
ィルタ（ＢＥＦ）３に供給され、ココＴ： ３．５Ｍ
Ｈ７テ約−１２Ｊ３減衰されて第３図（Ｂ）に示す如き
周波数スペクトラムとなる。Embodiment FIG. 2 shows a block system diagram of an embodiment of the recording system and recording apparatus of the method of the present invention. In the figure, an NTSC color video signal input to an input 9-seat element 1 is supplied to a comb filter 2, where it is separated into a luminance signal and a carrier color signal, respectively. The luminance signal extracted from the comb filter 2 has a frequency spectrum in band 1, as shown in FIG. 3 (A>).
It is a wideband signal of g1O~5.2MH7 and is supplied to the band M stop filter (BEF) 3, where T: 3.5M
H7te is attenuated by about -12J3, resulting in a frequency spectrum as shown in FIG. 3(B).
また、このＢＥＦ３の出力輝度信号の第３図（Ｂ）にＦ
Ｗで示す、〜３ＣＢにおける減衰周波数領域は±４５０
ｋＨＺに選定されである。このように、ＢＥＦ３より３
．５Ｍ Ｉｆ ｚ±４５０ｋＨＺの周波数領域の輝度信
号成分をレベル減衰するのは、次の理由による。Ｎ Ｔ
Ｓ Ｃ方式カラー映像信号は周知の如く、２種類の色
差信号で３．５８ Ｍ ＨＺの色副搬送波を直角二相変
調して得られた搬送色信号を、輝度信号に周波数インタ
ーリ−ピング手法で帯域共用多重化した信号である。従
って、くし形フィルタ２によりＮＴＳＣ方式カラー映像
信号から搬送色信号を除去した世の輝度信号には、第４
図にその周波数スペクトラムを示す如く、搬送色信号帯
域の輝度信号成分エネルギーを含ｌυでいる。この搬送
色信号帯域の輝度信号成分は、映像信号の水平ｗ？像度
に換算すると、約２８０Ｔ Ｖ本に相当する。Moreover, in FIG. 3 (B) of the output luminance signal of this BEF3, F
The attenuation frequency range at ~3CB, denoted W, is ±450
It was selected as kHz. In this way, 3 from BEF3
．． The reason why the level of the luminance signal component in the frequency domain of 5M If z±450kHz is attenuated is as follows. N.T.
As is well known, the SC system color video signal is a carrier color signal obtained by orthogonal two-phase modulation of a 3.58 MHz color subcarrier using two types of color difference signals, and is converted into a luminance signal using a frequency interleaving method. This is a band-sharing multiplexed signal. Therefore, in the luminance signal obtained by removing the carrier color signal from the NTSC color video signal using the comb filter 2, the fourth
As shown in the figure, the frequency spectrum includes the luminance signal component energy of the carrier color signal band. The luminance signal component of this carrier color signal band is the horizontal w? of the video signal. In terms of image resolution, this corresponds to approximately 280 TV lines.
それゆえ、この搬送色信号帯域の輝度信号成分を完全に
抑圧することは、この帯域の解像瓜を得ることができな
くなるので行なえない。Therefore, it is not possible to completely suppress the luminance signal component in this carrier color signal band, since this would make it impossible to obtain a high resolution of this band.
一方、上記の搬送色信号帯域に含まれる３、５ＭＨｚ±
４５０ｋｌ−１２の周波数領域には、後述する２つの被
周波数変調音声信号（ＦＭ音声信号）が多重されるよう
に現行のビデオディスクの規格により定められているの
で、上記の周波数領域の輝度信号成分を全く抑圧しない
と、再生情報に悪影野を与えてしまう。On the other hand, 3.5MHz± included in the above carrier color signal band
The current video disc standard specifies that two frequency modulated audio signals (FM audio signals), which will be described later, are multiplexed in the 450kl-12 frequency region, so the luminance signal component in the above frequency region is If it is not suppressed at all, it will give a bad shadow field to the reproduced information.
そこで、本発明では減衰周波数領域をＦＷ、その中心周
波数をｆＭとしたとぎ、ｆ Ｍ ／ ２ ＞ Ｆ Ｗに
選定し、また周波数ｆＭにおけるレベル減衰ｍを−６」
〜−２０，１３の範囲内に選定する。このレベル減衰量
範囲内のレベル減衰により、再生輝１σ信号及び再生音
声（Ｅｉ号共に実用１支Ｖ：ｌなく再生されることが本
発明者により確認された。本実施例は、上記減衰周波数
領域Ｆｗが９００ｋＨｚで、周波数ｆ Ｍ ／ ２は１
．７５ ＭＨｚ （＝ ３．５Ｍｌ−１２÷２）であり
、また３、 ５Ｍ ＨＺにおけるレベル減衰■は一１２
ｄＢで、いずれも上記の条件を満たしている。Therefore, in the present invention, the attenuation frequency region is set to FW, its center frequency is set to fM, and f M / 2 > FW is selected, and the level attenuation m at frequency fM is set to -6.
Select within the range of ~-20,13. The inventor has confirmed that by level attenuation within this level attenuation amount range, both the reproduced brightness 1σ signal and the reproduced sound (Ei) can be reproduced without a practical V:l. The area Fw is 900kHz and the frequency f M / 2 is 1
．． 75 MHz (= 3.5 Ml - 12 ÷ 2), and the level attenuation at 3.5 MHz is -12
dB, all of which satisfy the above conditions.
再び第１図に戻って説明するに、くし形フィルタ２より
取り出された、３．５８ＭＨ２±５００ｋｌ−１ｚの帯
域をもつ製送色信号は、周波数変換器４に供給され、こ
こで約２．５６ＭＨｚ±５００ｋｌ−（ｚの帯域をもつ
低域変換搬送色信号に変換される。この低域変換搬送色
信号は、前記した既存のビデオディスクシステムで伝送
される低域変換搬送色信号と同一の周波数帯域を有し、
もとの色ＤＩ搬送波周波数の５／７倍の色副搬送波周波
数を有するから、輝度信号と周波数インターリーブの関
係にある。Returning to FIG. 1 again, the color feed signal extracted from the comb filter 2 and having a band of 3.58 MH2±500 kl-1z is supplied to the frequency converter 4, where it is converted to a frequency of about 2.5 MHz. It is converted into a low frequency converted carrier color signal having a band of 56MHz±500kl-(z. This low frequency converted carrier color signal is the same as the low frequency converted carrier color signal transmitted in the existing video disc system mentioned above Has a frequency band,
Since it has a color subcarrier frequency that is 5/7 times as high as the original color DI carrier frequency, it is in a frequency interleaved relationship with the luminance signal.
加算回路５はＢＥＦ３より取り出された第３図（Ｂ）に
示した周波数スペクトラムの輝度信号と、周波数変換器
４より取り出された上記の低域変換搬送色信号とを加算
して両信乃が帯域共用多重化された映像信号を生成し、
この映像信号を加篩回路６に供給する。The adder circuit 5 adds the luminance signal of the frequency spectrum shown in FIG. Generates a shared multiplexed video signal,
This video signal is supplied to the filtering circuit 6.
一方、入力端子７及び８には第１ヂヤンネルの音声信号
で３．４３Ｍ＋−１２の搬送波を周波数変調して得た周
波数帯域３．４３Ｍ）１２±７５ｋｌ−１７の第１チヤ
ンネルのＦＭ音声信号と、第２チヤンネルの音声信号で
３．７３ＭＨ２の搬送波を周波数変調して得た周波数帯
域３．７３Ｍ１−ＬＺ±７５ｋ）Ｉｚの第２チヤンネル
のＦＭ音声信号とが別々に入来し、これより加幹回路６
に供給される。On the other hand, input terminals 7 and 8 receive the first channel FM audio signal with a frequency band of 3.43M) 12±75kl-17 obtained by frequency modulating the carrier wave of 3.43M+-12 with the first channel audio signal. , the second channel FM audio signal in the frequency band 3.73M1-LZ±75k)Iz obtained by frequency modulating the 3.73MH2 carrier wave with the second channel audio signal enters separately, and from this, the second channel FM audio signal is input. Trunk circuit 6
supplied to
これにより、加算回路６より取り出される信号は、第３
図（Ｃ）に周波数スペクトラムを示す如く、加算回路５
よりの輝度信号Ｙと低域変換搬送色信号ＣＲとの帯域共
用多重化信号に、Ｏｉ度信号Ｙの減衰周波数頭１１１３
．５Ｍ１−ＩＺ±４５０ｋＨｚ内に位買する２チヤンネ
ルのＦＭ音声信号Ａ１及びＡ２が多重化されてなる多重
化信号となる。As a result, the signal taken out from the adder circuit 6 is
As shown in the frequency spectrum in Figure (C), the adder circuit 5
The attenuation frequency head 1113 of the Oi intensity signal Y is added to the band-sharing multiplexed signal of the luminance signal Y and the low-frequency conversion carrier chrominance signal CR.
．． A multiplexed signal is obtained by multiplexing two channels of FM audio signals A1 and A2 within 5M1-IZ±450kHz.
この多重化信号は周波数変調器９に供給され、ここで−
の搬送波を周波数変調して、前記した既存のビデオディ
スクシステムで記録再生されるＦＭ信号と同一の搬送波
偏移帯域（例えばシンクチップレベルが６．１Ｍ１−Ｉ
Ｚ、ホワイトピークレベルが７．９ＭＨｚ）を有するＦ
Ｍ信号に変換された後、出力端子１０を介して公知の光
ビームを用いた記録装詔（図示せず）に供給され、これ
により例えばディスクに螺旋状トラックを形成して記録
される。This multiplexed signal is fed to a frequency modulator 9, where -
frequency modulation of the carrier wave of
Z, F with a white peak level of 7.9MHz)
After being converted into an M signal, the signal is supplied via the output terminal 10 to a recording device (not shown) using a known light beam, thereby recording, for example, a spiral track on a disk.
次に本発明の再生系の動作につき説明する。第５図は本
発明方法の再生系及び再生装置の一実施例のブロック系
統図を示す。同図中、入力端子１２には記録済ビデオデ
ィスクから再生されたＦＭ信号が入来し、これよりＦＭ
復調器１３に供給されてＦＭ復調され、第３図（Ｃ）に
示した周波数スペクトラムの再生多重化信号とされる。Next, the operation of the reproduction system of the present invention will be explained. FIG. 5 shows a block system diagram of an embodiment of the reproducing system and reproducing apparatus of the method of the present invention. In the figure, an FM signal reproduced from a recorded video disc is input to the input terminal 12, and from this, the FM signal is input to the input terminal 12.
The signal is supplied to the demodulator 13 and subjected to FM demodulation, resulting in a regenerated multiplexed signal having the frequency spectrum shown in FIG. 3(C).
この再生多重化信号は帯域フィルタ（以下ＢＰＦと記す
）１４及び１５に夫々供給されて、第３図（Ｃ）にＡ１
及びＡ２で示した周波数スペクトラムの第１及び第２チ
ヤンネルの再生ＦＭ音声信号が分離Ｐ波されて出力端子
１６．１７を介してＦ ｆｖｌ復調器（図示せず）へ出
力される一方、波形整形回路１８及び１つに別々に供給
される。This regenerated multiplexed signal is supplied to bandpass filters (hereinafter referred to as BPF) 14 and 15, respectively, and as shown in FIG.
The reproduced FM audio signals of the first and second channels of the frequency spectrum indicated by A2 and A2 are separated into P waves and outputted to the Ffvl demodulator (not shown) via output terminals 16 and 17, while being waveform shaped. The circuits 18 and 1 are supplied separately.
また、これと同時に上記の再生多重化信号はくし形フィ
ルタ２０に供給され、ここで低域変換搬送色信号成分が
除去された輝度信号及びＦＭ音声信号からなる再生信号
が取り出されて、時間合わせのための遅延回路２１を通
して加算回路２３に供給される。一方、波形整形回路１
８により波形整形された第１チヤンネルの再生ＦＭ音声
信号と、波形整形回路１９により波形整形された第２チ
ヤンネルの再生ＦＭ音声信号と番よ夫々移相回路２４゜
２５により逆相となるように移相された後、加諒回路２
３に供給される。これにより、加偽回路２３からは遅延
回路２１の出力再生信号中のＦＭ８声信局信号殺除去さ
れて、第３図（Ｂ）に示した如き周波数スペクトラムの
広帯域の再生輝度信号のみが取り出される。At the same time, the above-mentioned reproduced multiplexed signal is supplied to the comb filter 20, where a reproduced signal consisting of a luminance signal and an FM audio signal from which the low-pass conversion carrier color signal component has been removed is extracted, and the time adjustment is performed. The signal is supplied to an adder circuit 23 through a delay circuit 21. On the other hand, waveform shaping circuit 1
The reproduced FM audio signal of the first channel whose waveform has been shaped by the waveform shaping circuit 19 and the reproduced FM audio signal of the second channel whose waveform has been shaped by the waveform shaping circuit 19 are set to have opposite phases by the respective phase shift circuits 24 and 25. After being phase-shifted, the additive circuit 2
3. As a result, the FM8 voice signal station signal in the reproduced signal output from the delay circuit 21 is removed from the add/fail circuit 23, and only the reproduced luminance signal with a wide frequency spectrum as shown in FIG. 3(B) is extracted. .
他方、くし形フィルタ２０により再生多重化信号中から
輝度信号周波数成分を除去されて取り出された再生信号
はＢＰＦ２６に供給され、ここで２．５６Ｍ１−１ｚ±
５００ｋ）ｌＺｏの再生低域変換搬送色信号のみがＰ波
された後周波数変換器２７に供給される。周波数変換器
２７により周波数変換されてもとの帯ｂＩ （３，５８
ＭＨ２±５００ｋＨｚ ） Ｉ、ニー戻された再生搬送
色信号は、加算回路２８に供給される。On the other hand, the reproduced signal, which is extracted by removing the luminance signal frequency component from the reproduced multiplexed signal by the comb filter 20, is supplied to the BPF 26, where 2.56M1-1z±
500k) Only the reproduced low frequency conversion carrier color signal of lZo is supplied to the frequency converter 27 after being made into a P wave. The frequency is converted by the frequency converter 27 and the original band bI (3,58
MH2±500kHz) I, the knee-returned reproduced carrier color signal is supplied to the adder circuit 28.
なお、多くの場合、再生信号中には再４一過程によって
生ずる時間軸変動を伴っているので、この周波数変換器
２７にはこの時間軸変動を除去するための公知の回路を
備えていること警ま勿論である。Note that, in many cases, the reproduced signal is accompanied by time axis fluctuations caused by the reproduction process, so the frequency converter 27 should be equipped with a known circuit for removing this time axis fluctuation. Of course, be careful.
加算回路２８は加算回路２３より取り出された第３図（
Ｂ）に示す如き周波数スペクトラムの広帯域再生輝度信
号と、周波数変換器２７より取り出された時間軸変動の
殆どない再生搬送色信号とを夫々加算し、これにより得
られた帯域共用多重化信号を再生ＮＴＳＣ方式カラー映
像信号として出力端子２つへ出力する。このようにして
、既存のビデオディスクシステムに比べ、水平解像度が
大幅に向上した高画質の再生カラー画像を得ることがで
きる。The adder circuit 28 is shown in FIG. 3 taken out from the adder circuit 23 (
B) A broadband reproduced luminance signal with a frequency spectrum as shown in FIG. Output to two output terminals as an NTSC color video signal. In this way, it is possible to obtain high quality reproduced color images with significantly improved horizontal resolution compared to existing video disc systems.
ところで、第３図（Ｃ）に示した多ｍ化信号の周波数ス
ペクトラム中、約３Ｍ１−（１以上の輝度信号高域成分
を除いた信号部分は既存のビデオディスクシステムで伝
送される多重化信号の周波数スペクトラムと同一である
。従って、本実施例により記録されたビデオディスクを
既存のビデオディスク再生装置で再生した場合は、上記
の約３８１１７以上の輝度信号高域成分は無視され、そ
れ以外の信号は正常に再生されるので、既存のビデオデ
ィスクと同等の多重化信号の再生が行なえることとなる
。By the way, in the frequency spectrum of the multi-m signal shown in FIG. Therefore, when a video disc recorded according to this embodiment is played back using an existing video disc playback device, the high-frequency components of the luminance signal above about 38117 are ignored, and the other components are ignored. Since the signal is reproduced normally, it is possible to reproduce the multiplexed signal in the same way as with existing video discs.
なお、本発明は上記の実施例に限定されるものではなく
、その他種々の変形例も包含するものである。例えば、
第５図に示したＢＰＦ２６の入力信号はＦＭ復調器１３
の出力再生多重化信号とし、かつ、周波数変換ｆ！Ａ２
７と加算回路２８との間に、搬送色信号用くし形フィル
タを挿入する構成としてもよい。また、音声信号以外の
他の情報信号（例えばコンピュータプログラム、ファク
シミリ信号、その他各種のディジタルデータ）を音声信
号に代えて、又は音声信号とは別チャンネルで記録する
ようにしてもよい。It should be noted that the present invention is not limited to the above embodiments, but also includes various other modifications. for example,
The input signal of the BPF 26 shown in FIG.
The output regenerated multiplexed signal is the frequency converted f! A2
A configuration may also be adopted in which a comb filter for carrier color signals is inserted between 7 and the addition circuit 28. Furthermore, information signals other than the audio signal (for example, computer programs, facsimile signals, and various other types of digital data) may be recorded in place of the audio signal or on a channel separate from the audio signal.
更に、記録媒体としては、再生専用のビデオディスクに
限らず、磁気テープ、書き替え可能な光ディスク等、他
の記録媒体にも適用することができることは勿論である
。Furthermore, the recording medium is not limited to a playback-only video disc, but can of course be applied to other recording media such as a magnetic tape and a rewritable optical disc.
発明の効果
上述の如く、本発明によれば、記録媒体あるいｔよ記録
再生装置の伝送帯域に応じて既存の記録再生システムよ
りも広帯域で映像信号などの情報信号を記録再生するこ
とができ、また映像信号が帯域制限され、映像帯域内で
他の情報信号（例えば被角度変調音声信号）が多重化さ
れ、しがも標準化されているような既存の記録再生シス
テムとのＩｉ換性を保ちながら、より広帯域の映像信号
の記録、再生ができ、水平解像度が向上した高画質の再
生画像を得ることかぐきる等の特長を有するものである
。Effects of the Invention As described above, according to the present invention, information signals such as video signals can be recorded and reproduced in a wider band than existing recording and reproduction systems, depending on the transmission band of the recording medium or the recording and reproduction apparatus. In addition, the video signal is band-limited, other information signals (for example, angle-modulated audio signals) are multiplexed within the video band, and compatibility with existing recording and reproducing systems that are standardized is also improved. It has features such as being able to record and play back video signals over a wider band while maintaining the same quality, and to obtain high-quality playback images with improved horizontal resolution.
第１図は本発明の動作原理を説明するための各１９号の
周波数スペクトラムを示す図、第２図は本発明方法の記
録系及び記録装ｄの一実施例を示すブロック系統図、第
３図は第２図及び第５図図示ブロック系統の動作説明用
の各部の信号の周波数スペク１〜ラムを示す図、第４図
は輝度信号の周波数スペクトラムの一例を示す図、第５
図は本発明方法の再生系及び再生装置の一実施例を示す
ブ［１ツク系統図である。
１・・・カラー映像信号入力端子、２．２０・・・くし
形フィルタ、３・・・帯域阻止フィルタ（ＢＥＦ）、５
．６，２３．２８・・・加算回路、７，８・・・ＦＭ音
声信号入力端子、９・・・周波数変調器、１２・・・再
生ＦＭ多重化信号入力端子、１３・・・ＦＭ復調器、１
４．１５・・・ＦＭ音声信号分離用帯域フィルタ（ＢＰ
Ｆ）、２４．２５・・・移相回路、２９・・・再生カラ
ー映像信号出力端子。
特許出願人 日木ビクター株式会社
第 鳳 図
第２図
箪３図
ｔ ｄＢ＋
（ｄ８）
第４ 図
第５図
手続補正書
昭和６１年１１月１７１
１、事件の表示
昭和６１年 特訂願 第２３９８２３号２、発明の名称
５単化情報信号記録再生方法及びその装置３、補正をす
る者
事件との関係 特許出願人
住所 〒２２１ 神奈川県横浜市神奈用区守屋町３丁
目１２番地名称 （４３２） 日本ビクター株式会社
代表者 取締役社長 垣 木 邦 夫
４、代理人
住所 〒１０２ 東京都千代田区麹町５丁目７番地６
、 補正の対象
明細書の特許請求の範囲、発明の詳細な説明の欄。
７、補正の内容
（１）明ｍ古中、特許請求の範囲の欄記載を別紙の通り
補正する。
■ 同、第１１頁６行及び第１４頁１６行記載の「６ｄ
Ｂ」をｒ３．ＥＪと補正する。
特許請求の範囲
［（１）映像信号などの広帯域の第１の情報信号の所定
周波数領域の信号成分のみを一定レベル減衰した後、該
所定周波数領域に該第１の情報信号より狭帯域の第２の
情報信号で搬送波を角度変調して得た被角度変調波信号
を多重し、これにより得られた多重化情報信号で単一の
搬送波を変調してから記録媒体に記録し、再生時は該記
録媒体から再生した被変調多重化情報信号を復調して得
られた再生多重化情報信号から該被角度変調波信号を周
波数選択して分離し、該再生多重化情報信号に該分離し
た被角度変調波信号を略逆相にして加筒することにより
再生された該第１の情報信号を取り出すことを特徴とす
る多用化情報信号記録再生方法。
■ 映像信号などの広帯域の第１の情報信号の所定周波
数ｇＡ域の信号成分のみを一定レベル減衰する減衰手段
と、
少なくとも該減衰手段より取り出された第１の情報信号
の該所定周波数領域に、該第１の情報信号より狭帯域の
第２の情報信号で搬送波を角度変調して得た被角度変調
波信号を多重する多重手段と、
該多重手段より取り出された多重化情報信号で単一の搬
送波を変調してから記録媒体に記録する記録手段とより
なることを特徴とする多重化情報信号記録装置。
■ 該減衰手段は該第１の情報信号の該所定周波数領域
の信号成分のみを、１．ｅ以上で、かつ、２０出以下の
範囲内の減衰量でレベル減衰することを特徴とする特許
請求の範囲第２項記載の多重化情報信号記録装置。
（４）該減衰手段は、レベル減衰する該第１の情報信号
の該所定周波ｒｌｌ領域をＦｗ、該所定周波数領域の中
心周波数をｆＭとしたとき、
ｆ Ｍ ／ ２ ＞ Ｆ Ｗ
なる関係を満足するレベル減衰を行なうことを特徴とす
る特許請求の範囲第２項又は第３項記載の多重化情報信
号記録装置。
■ 該第１の情報信号ｔよ輝度信号であり、該第２の情
報信号は音声信号であり、該多重手段は該輝度信号中の
該レベル減衰された所定周波＠領域に被角度変調波音声
信号が多重されると共に、該所定周波数領域よりも低周
波数領域に低域変換搬送色信号が帯域共用多重化されて
なる多重化情報信号を生成出力することを特徴とする特
許請求の範囲第２項乃至第４項のうちいずれか一項記載
の多重化情報信号記録装置。
６）所定周波数領域の信号成分のみが一定レベル減衰さ
れている映像信号などの広帯域の第１の情報信号の該所
定周波数領域に、該第１の情報信号より狭帯域の第２の
情報信号で搬送波を角度変調して得た被角度変調波信号
が多重されてなる多重化情報信号が、変調されて記録さ
れている記録済記録媒体の既記緑信号を再生し、再生信
号を復調して再生多ｍ化情報信号を得る復調手段と、該
復調手段より取り出さ机た再生多重化情報信号から該被
角度変調波信号を分離出力する周波数選択手段と、
該再生多重化情報信号に該分離された被角度変調波信号
を略逆相にして加算することにより、該再生多重化情報
信号から該第１の情報信号を分離出力する手段とよりな
ることを特徴とする多重化情報信号再生装置。」FIG. 1 is a diagram showing the frequency spectrum of each No. 19 for explaining the operating principle of the present invention, FIG. 2 is a block system diagram showing an embodiment of the recording system and recording device d of the method of the present invention, and FIG. The figures are diagrams showing frequency spectra 1 to 1 of signals of each part for explaining the operation of the block systems shown in Figures 2 and 5, Figure 4 is a diagram showing an example of the frequency spectrum of a luminance signal, and Figure 5 is a diagram showing an example of the frequency spectrum of a luminance signal.
The figure is a block system diagram showing an embodiment of the reproducing system and reproducing apparatus of the method of the present invention. 1... Color video signal input terminal, 2.20... Comb filter, 3... Band rejection filter (BEF), 5
．． 6, 23, 28... Addition circuit, 7, 8... FM audio signal input terminal, 9... Frequency modulator, 12... Reproduction FM multiplexed signal input terminal, 13... FM demodulator ,1
4.15...Band filter for FM audio signal separation (BP
F), 24.25... Phase shift circuit, 29... Playback color video signal output terminal. Patent Applicant Hiki Victor Co., Ltd. Daiho Figure 2 Figure 3 Figure 3 t dB+ (d8) Figure 4 Figure 5 Procedural Amendment November 1985 171 1. Indication of the Case 1988 Special Amendment Application No. 239823 No. 2, Name of the invention 5 Single information signal recording and reproducing method and device 3, Relationship with the case of the person making the amendment Patent applicant address 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa 221 Name (432) Victor Japan Co., Ltd. Representative Director and President Kunio Kakiki 4, Agent address 5-7-6 Kojimachi, Chiyoda-ku, Tokyo 102
, claims and detailed description of the invention in the specification to be amended. 7. Contents of amendment (1) The description in the scope of claims is amended as shown in the attached sheet. ■ “6d” written on page 11, line 6 and page 14, line 16
B” to r3. Correct with EJ. Claims [(1) After attenuating only the signal components in a predetermined frequency range of a wideband first information signal such as a video signal to a certain level, a signal component in a narrower band than the first information signal is added to the predetermined frequency range. The angle-modulated wave signal obtained by angle-modulating the carrier wave with the information signal No. 2 is multiplexed, and the resulting multiplexed information signal is used to modulate a single carrier wave and then recorded on a recording medium. The angle modulated wave signal is frequency-selected and separated from the reproduced multiplexed information signal obtained by demodulating the modulated multiplexed information signal reproduced from the recording medium, and the separated multiplexed information signal is added to the reproduced multiplexed information signal. 1. A versatile information signal recording and reproducing method, characterized in that the first information signal reproduced by curving an angle modulated wave signal with a substantially reverse phase is extracted. (2) Attenuation means for attenuating only signal components in a predetermined frequency gA range of a wideband first information signal such as a video signal to a certain level; and at least the predetermined frequency range of the first information signal extracted from the attenuation means; multiplexing means for multiplexing angle-modulated wave signals obtained by angle-modulating a carrier wave with a second information signal having a narrower band than the first information signal; and a single multiplexed information signal extracted from the multiplexing means. 1. A multiplexed information signal recording device comprising: a recording means for modulating a carrier wave and recording the modulated carrier wave on a recording medium. (2) The attenuating means reduces only the signal component of the first information signal in the predetermined frequency range to 1. 3. The multiplexed information signal recording apparatus according to claim 2, wherein the level is attenuated by an amount of attenuation within a range of e or more and 20 or less. (4) The attenuation means satisfies the relationship f M / 2 > F W , where Fw is the predetermined frequency rll region of the first information signal whose level is attenuated, and fM is the center frequency of the predetermined frequency region. 4. The multiplexed information signal recording apparatus according to claim 2, wherein the multiplexed information signal recording apparatus performs level attenuation. (2) The first information signal t is a luminance signal, the second information signal is an audio signal, and the multiplexing means adds the angle-modulated wave audio to the level-attenuated predetermined frequency region of the luminance signal. The second aspect of the present invention is characterized in that the signals are multiplexed and a multiplexed information signal is generated and outputted by band-sharing multiplexing of a low frequency transform carrier color signal in a frequency region lower than the predetermined frequency region. The multiplexed information signal recording device according to any one of items 1 to 4. 6) A second information signal having a narrower band than the first information signal is added to the predetermined frequency region of a wideband first information signal such as a video signal in which only signal components in a predetermined frequency region are attenuated to a certain level. A multiplexed information signal obtained by multiplexing an angle-modulated wave signal obtained by angle-modulating a carrier wave reproduces the green signal of the recorded recording medium on which the modulated signal is recorded, and demodulates the reproduced signal. demodulating means for obtaining a reproduced multiplexed information signal; frequency selection means for separating and outputting the angle modulated wave signal from the reproduced multiplexed information signal extracted from the demodulating means; 1. A multiplexed information signal reproducing device comprising means for separating and outputting the first information signal from the reproduced multiplexed information signal by adding the angle-modulated wave signals with substantially opposite phases. ”
Claims (6)
波数領域の信号成分のみを一定レベル減衰した後、該所
定周波数領域に該第１の情報信号より狭帯域の第２の情
報信号で搬送波を角度変調して得た被角度変調波信号を
多重し、これにより得られた多重化情報信号で単一の搬
送波を変調してから記録媒体に記録し、再生時は該記録
媒体から再生した被変調多重化情報信号を復調して得ら
れた再生多重化情報信号から該被角度変調波信号を周波
数選択して分離し、該再生多重化情報信号に該分離した
被角度変調波信号を略逆相にして加算することにより再
生された該第１の情報信号を取り出すことを特徴とする
多重化情報信号記録再生方法。(1) After attenuating only the signal components in a predetermined frequency range of a wideband first information signal such as a video signal to a certain level, a second information signal having a narrower band than the first information signal is added to the predetermined frequency range. Angle modulated wave signals obtained by angle modulating a carrier wave are multiplexed, a single carrier wave is modulated with the multiplexed information signal obtained by this, and then recorded on a recording medium, and when reproduced, it is reproduced from the recording medium. The angle modulated wave signal is frequency-selected and separated from the regenerated multiplexed information signal obtained by demodulating the modulated multiplexed information signal, and the separated angle modulated wave signal is added to the regenerated multiplexed information signal. 1. A multiplexed information signal recording and reproducing method, characterized in that the first information signal reproduced by adding the first information signal in substantially opposite phase is extracted.
波数領域の信号成分のみを一定レベル減衰する減衰手段
と、 少なくとも該減衰手段より取り出された第１の情報信号
の該所定周波数領域に、該第１の情報信号より狭帯域の
第２の情報信号で搬送波を角度変調して得た被角度変調
波信号を多重する多重手段と、 該多重手段より取り出された多重化情報信号で単一の搬
送波を変調してから記録媒体に記録する記録手段とより
なることを特徴とする多重化情報信号記録装置。(2) Attenuation means for attenuating only signal components in a predetermined frequency range of a broadband first information signal such as a video signal to a certain level; , multiplexing means for multiplexing angle-modulated wave signals obtained by angle-modulating a carrier wave with a second information signal having a narrower band than the first information signal; 1. A multiplexed information signal recording device comprising a recording means for modulating one carrier wave and then recording it on a recording medium.
域の信号成分のみを６ｄＢ以上で、かつ、２０ｄＢ以下
の範囲内の減衰量でレベル減衰することを特徴とする特
許請求範囲第２項記載の多重化情報信号記録装置。(3) The attenuation means attenuates the level of only the signal component in the predetermined frequency region of the first information signal by an attenuation amount within a range of 6 dB or more and 20 dB or less. 2. The multiplexed information signal recording device according to item 2.
の該所定周波数領域をＦｗ、該所定周波数領域の中心周
波数をｆ＿Ｍとしたとき、 ｆ＿Ｍ／２＞Ｆｗ なる関係を満足するレベル減衰を行なうことを特徴とす
る特許請求の範囲第２項又は第３項記載の多重化情報信
号記録装置。(4) The attenuation means performs level attenuation that satisfies the relationship: f_M/2>Fw, where Fw is the predetermined frequency region of the first information signal whose level is to be attenuated, and f_M is the center frequency of the predetermined frequency region. A multiplexed information signal recording device according to claim 2 or 3, characterized in that the multiplexed information signal recording device performs the following.
報信号は音声信号であり、該多重手段は該輝度信号中の
該レベル減衰された所定周波数領域に被角度変調波音声
信号が多重されると共に、該所定周波数領域よりも低周
波数領域に低域変換搬送色信号が帯域共用多重化されて
なる多重化情報信号を生成出力することを特徴とする特
許請求の範囲第２項乃至第４項のうちいずれか一項記載
の多重化情報信号記録装置。(5) the first information signal is a luminance signal; the second information signal is an audio signal; The second aspect of the present invention is characterized in that the signals are multiplexed and a multiplexed information signal is generated and outputted by band-sharing multiplexing of a low frequency transform carrier color signal in a frequency region lower than the predetermined frequency region. The multiplexed information signal recording device according to any one of items 1 to 4.
されている映像信号などの広帯域の第１の情報信号の該
所定周波数領域に、該第１の情報信号より狭帯域の第２
の情報信号で搬送波を角度変調して得た被角度変調波信
号が多重されてなる多重化情報信号が、変調されて記録
されている記録済記録媒体の既記録信号を再生し、再生
信号を復調して再生多重化情報信号を得る復調手段と、 該復調手段より取り出された再生多重化情報信号から該
被角度変調波信号を分離出力する周波数選択手段と、 該再生多重化情報信号に該分離された被角度変調波信号
を略逆相にして加算することにより、該再生多重化情報
信号から該第１の情報信号を分離出力する手段とよりな
ることを特徴とする多重化情報信号再生装置。(6) In the predetermined frequency range of a wideband first information signal such as a video signal in which only signal components in a predetermined frequency range are attenuated to a certain level, a second information signal having a narrower band than the first information signal is added.
A multiplexed information signal obtained by multiplexing an angle-modulated wave signal obtained by angle-modulating a carrier wave with an information signal of demodulating means for demodulating to obtain a regenerated multiplexed information signal; frequency selection means for separating and outputting the angle modulated wave signal from the regenerated multiplexed information signal extracted by the demodulating means; Multiplexed information signal regeneration characterized by comprising means for separating and outputting the first information signal from the regenerated multiplexed information signal by adding the separated angle modulated wave signals with substantially opposite phases. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239823A JPS6393285A (en) | 1986-10-08 | 1986-10-08 | Method and device recording and reproducing multiplex information signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61239823A JPS6393285A (en) | 1986-10-08 | 1986-10-08 | Method and device recording and reproducing multiplex information signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6393285A true JPS6393285A (en) | 1988-04-23 |
Family
ID=17050380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61239823A Pending JPS6393285A (en) | 1986-10-08 | 1986-10-08 | Method and device recording and reproducing multiplex information signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6393285A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02149087A (en) * | 1988-11-30 | 1990-06-07 | Victor Co Of Japan Ltd | Information signal recording disk and reproducing device therefor |
-
1986
- 1986-10-08 JP JP61239823A patent/JPS6393285A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02149087A (en) * | 1988-11-30 | 1990-06-07 | Victor Co Of Japan Ltd | Information signal recording disk and reproducing device therefor |
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