JPS58223976A - Vtr recorder and reproducer for character signal - Google Patents
Vtr recorder and reproducer for character signalInfo
- Publication number
- JPS58223976A JPS58223976A JP57106909A JP10690982A JPS58223976A JP S58223976 A JPS58223976 A JP S58223976A JP 57106909 A JP57106909 A JP 57106909A JP 10690982 A JP10690982 A JP 10690982A JP S58223976 A JPS58223976 A JP S58223976A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- recording
- character
- vtr
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
- H04N9/8233—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being a character code signal
- H04N9/8238—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal the additional signal being a character code signal for teletext
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/93—Regeneration of the television signal or of selected parts thereof
- H04N5/9305—Regeneration of the television signal or of selected parts thereof involving the mixing of the reproduced video signal with a non-recorded signal, e.g. a text signal
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、テレビジ式ン信号（以下ＴＶ倍信号略す）の
垂直帰線期間に重畳された文字信号を記録再生すること
のできる磁気録画再生装置（以下ＶＴＲと略す）に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing apparatus (hereinafter abbreviated as VTR) capable of recording and reproducing a character signal superimposed on the vertical blanking period of a television-type signal (hereinafter abbreviated as TV double signal). It is related to.
ＶＴＲの利用方法としては、ＴＶ傷信号記録再生する場
合と、撮像装置によ９画像を録画し再生する場合の二つ
がある。このうちのＴＶ傷信号記録再生において、ＴＶ
傷信号記録再生するだけでなく、新しい放送サービスで
ある。電子通信学会誌ＶＯＬ６５．随１ｙＰ５Ｂ、村崎
著［テレテキス）Ｊ＆Ｃ記載されている文字多重放送の
文字信号も同時に記録して、ＴＶ画傷に関係のある補間
番組などを利用したいというニーズが高まってくると考
えられる。そのためＫは。There are two ways to use a VTR: to record and reproduce TV scratch signals, and to record and reproduce nine images using an imaging device. Among these, in TV scratch signal recording and reproduction, TV
It is a new broadcasting service that not only records and plays scratch signals. Journal of the Institute of Electronics and Communication Engineers VOL65. It is thought that there will be a growing need to simultaneously record the text signals of teletext broadcasting described in 1yP5B, Murasaki [Teletext] J&C, and to use interpolated programs related to TV picture scratches. Therefore, K.
文字信号をＶＴＲに記録再生する事が必要である。It is necessary to record and reproduce character signals on a VTR.
第１図に従来のＶＴＲのブロック図を示す。FIG. 1 shows a block diagram of a conventional VTR.
この図において、１はＴＶ傷信号入力端子、２はＴＶ傷
信号ら輝度信号を抜き取るＬＰＦ回路。In this figure, 1 is a TV flaw signal input terminal, and 2 is an LPF circuit that extracts a luminance signal from the TV flaw signal.
３は色信号を抜き取るＢＰＦ回路、４はＦＭ変調回路、
５は色信号を低周波変換する低周波変換回路、６は色信
号への影響をなくすためのＲＰＦ回路、７は輝度信号へ
の影響をなくすためのＬＰＦ回路、８は録画再生のヘッ
ド系、９は増幅回路、１０ハ再生ヘツド系から得られた
信号から輝度信号を分離するＨＰＦ回路、１１は色信号
を分離するＬＰＦ回路、１２はＦＭ復調回路。3 is a BPF circuit that extracts the color signal, 4 is an FM modulation circuit,
5 is a low frequency conversion circuit that converts the color signal into a low frequency signal; 6 is an RPF circuit that eliminates the influence on the color signal; 7 is an LPF circuit that eliminates the influence on the luminance signal; 8 is a head system for recording and playback; 9 is an amplifier circuit, 11 is an HPF circuit that separates a luminance signal from the signal obtained from the reproduction head system, 11 is an LPF circuit that separates a color signal, and 12 is an FM demodulation circuit.
１５は再生色信号を高周波変換する高周波変換回路、１
４は輝度信号のキャリアを取シ除くＬＰＦ回路、１５は
色信号のみを取シ出すＢＰＦ回品。15 is a high frequency conversion circuit that converts the reproduced color signal into a high frequency signal;
4 is an LPF circuit that removes the carrier of the luminance signal, and 15 is a BPF circuit that removes only the color signal.
１６は再生ＴＶ倍信号出力端子である。このようなＶＴ
Ｒにおいて、映像信号を記録再生する場合釦ついて説明
する。まず記録時には入力端子１からの映像信号はＬＰ
Ｆ回路２とＢＰＦ回路３によシ輝度信号と３．５８ Ｍ
Ｈｚを搬送波とする色信号とに分離される。このように
して分離された輝度信号はＦＭ変調回路４にょＦ）ＦＭ
変調され、ＥＰＦ回路６で色信号に影響を与える低周波
成分が除かれる。Reference numeral 16 is a reproduced TV double signal output terminal. VT like this
In R, the buttons used when recording and reproducing video signals will be explained. First, during recording, the video signal from input terminal 1 is LP.
The luminance signal and 3.58 M are transmitted through F circuit 2 and BPF circuit 3.
The signal is separated into a color signal using Hz as a carrier wave. The luminance signal separated in this way is sent to the FM modulation circuit 4.
The EPF circuit 6 removes low frequency components that affect the color signal.
一方１色値号は３−５８ＡｆＪ７ｚの搬送波が低周波変
換回路５によ＃）６２９に１１２ Ｋ変換され、ＬＰＦ
回路７で輝度信号圧影響を与える高周波成分が除かれて
、前記の輝度信号と加算して録画ヘッド系８によシ録画
される。次に再生時には、記録媒体に記録された映像信
号が再生ヘッド系８にｔ より取ル出され、増幅回
路９で増幅された後。On the other hand, for one color value, the carrier wave of 3-58AfJ7z is converted to #)629 by 112K by the low frequency conversion circuit 5, and the LPF
High frequency components that affect the luminance signal pressure are removed by the circuit 7, added to the luminance signal, and recorded by the recording head system 8. Next, at the time of reproduction, the video signal recorded on the recording medium is taken out to the reproduction head system 8 through t, and after being amplified by the amplifier circuit 9.
ＥＰＦ回路１０で輝度信号から分離され、ＬＰＦ回路１
１で６２９ ＫＨｚを搬送波とする色信号が分離される
。ＨＰＦ回路１０で得られた輝度信号はＦＭ変調されて
いるのでＦＭ復調回路１２により復調し、 ４ＭＥｚ程
度のＦＭ復調による搬送波漏れをＬＰＦ回路１４で除去
して輝度信号を得る。またＬＰＦ回路１１で得られた色
信号は、 ｉ、５８Ｍ１１ｚを搬送波とする信号に高周
波変換回路１３で変換され、 ５．５８ＭＨｚを中心と
する通過帯域を有するＢＰＦ回路１５によシ色信号を得
て、上記輝度信号と加え合わせて、映像信号を再生する
ことができる。It is separated from the luminance signal by the EPF circuit 10, and then the LPF circuit 1
1, a color signal having a carrier wave of 629 KHz is separated. Since the luminance signal obtained by the HPF circuit 10 is FM modulated, it is demodulated by the FM demodulation circuit 12, and the carrier wave leakage caused by the FM demodulation of about 4 MEz is removed by the LPF circuit 14 to obtain the luminance signal. Further, the color signal obtained by the LPF circuit 11 is converted into a signal using i, 58M11z as a carrier wave by a high frequency conversion circuit 13, and a color signal is obtained by a BPF circuit 15 having a passband centered at 5.58MHz. In addition to the luminance signal, a video signal can be reproduced.
しかし、このようなＶＴＲにおいて、ＬＰＦ回路２で輝
度信号を抜き取るためのフィルタが挿入されているため
、ＶＴＲの記録帯域は第２図に示すように約２ＭＨｚの
周波数帯域となる。However, in such a VTR, since a filter is inserted for extracting the luminance signal by the LPF circuit 2, the recording band of the VTR becomes a frequency band of approximately 2 MHz as shown in FIG.
一方１文字信号の信号スペクトルは、第３図に示すよう
に、 ２．８６ＭＨ２をし中断周波数として４．５Ｍ
Ｈｚまで存在する。従りて１文字信号をＶＴＲに記録し
再生しようと□する場合には従来のＶＴＲでは記録帯域
が狭いために１文字信号を記録できず、ＴＶ番組に関連
した文字放送をＶＴＲに記録し再生したいというユーザ
要求を満足できないという問題があった。On the other hand, the signal spectrum of a single character signal is 2.86MH2 and the interruption frequency is 4.5M, as shown in Figure 3.
Exist up to Hz. Therefore, when trying to record a single character signal on a VTR and play it back, conventional VTRs cannot record a single character signal due to their narrow recording band, so it is necessary to record and playback text broadcasts related to TV programs on the VTR. There was a problem in that it was not possible to satisfy the user's request to do so.
本発明の目的は、上記した従来の欠点をなくし１文字信
号を記録再生できるＶＴＲを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a VTR capable of recording and reproducing single character signals without the above-mentioned conventional drawbacks.
上記目的を達成するために１本発明では従来のＶＴＲに
用いられているＬＰＦ回路を１文字信号が重畳されてい
る期間のみ無効とすること圧よυ、他のＴＶ傷信号録画
再生に影響を与、えることなく１文字信号を記録、再生
できるようにするものである。In order to achieve the above object, the present invention disables the LPF circuit used in conventional VTRs only during the period when a single character signal is superimposed. This allows a single character signal to be recorded and reproduced without the need for input or input.
以下、本発明の一実施例を第４図により説明する。第４
図において、１〜１６までは第１図のブロック図におけ
るものと同じであり、１７はＬＰＦ回路２を無効とする
スイッチ回路、１ＢはＨＰＦ回路６を無効とするスイッ
チ回路、１９ハ記録色信号処理回路を切り離すスイッチ
回路、２０はＨＰＦ回路１０を無効とするスイッチ回路
、２１は再生色信号処理回路を切シ離すスイッチ回路。An embodiment of the present invention will be described below with reference to FIG. Fourth
In the figure, 1 to 16 are the same as those in the block diagram of FIG. 1, 17 is a switch circuit that disables the LPF circuit 2, 1B is a switch circuit that disables the HPF circuit 6, and 19C is a recording color signal. A switch circuit for disconnecting the processing circuit, 20 a switch circuit for disabling the HPF circuit 10, and 21 a switch circuit for disconnecting the reproduced color signal processing circuit.
２２は記録系同期分離回路、２５は文字信号がＴＶ信信
号型重畳れている位置を検出する記録系文字信号重畳位
置検出回路、２４は再生系同期分離回路、２５は再生系
文字信号重畳位置検出回路。22 is a recording system synchronization separation circuit; 25 is a recording system character signal superimposition position detection circuit for detecting the position where a character signal is superimposed in a TV signal type; 24 is a reproduction system synchronization separation circuit; 25 is a reproduction system character signal superimposition position detection circuit.
２６は再生時の映像期間のカラーバースト信号に同期し
た色副搬送波を垂直帰線期間だけ持続させる色副搬送波
発生回路、２７は垂直帰線期間に上記信号をカラーバー
スト信号として付加するためのスイッチ回路である。ま
ず、記録系について説明する。記録系文字信号重畳位置
検出回路２６からの出力信号は、第５図（Ａｌに示すよ
うに。Reference numeral 26 denotes a color subcarrier generation circuit that maintains a color subcarrier synchronized with the color burst signal of the video period during playback only during the vertical retrace period, and 27 a switch for adding the above signal as a color burst signal during the vertical retrace period. It is a circuit. First, the recording system will be explained. The output signal from the recording system character signal superimposition position detection circuit 26 is as shown in FIG. 5 (Al).
文字信号が重畳されている位置に対応して信号が出力さ
れる。また、その出力信号はスイッチ回路１７，１８．
１９の制御信号として働く。まず。A signal is output corresponding to the position where the character signal is superimposed. Further, the output signal is transmitted to the switch circuits 17, 18 .
It serves as a control signal for 19. first.
文字信号が重畳されていない通常のＴＶ傷信号期間は記
録系文字信号重畳位置検出回路２５の出力信号はロウと
なり、スイッチ回路１７ 、１８をオフ、１９をオンと
して、従来のＶＴＲのブロック構成と同様の接続となｐ
ＴＶ信号を記録することができる。次に１文字信号が重
畳されている期間では、記録系文字信号重畳位置検出回
路２３の出力信号はハイとなって、スイッチ回路１７゜
１８をオン、１９をオフとさせる。スイッチ回路１７を
オンとした事でＬＰＦ回路２は無効となシ。During a normal TV scratch signal period when a character signal is not superimposed, the output signal of the recording system character signal superimposition position detection circuit 25 is low, and the switch circuits 17 and 18 are turned off and switch circuit 19 is turned on, which corresponds to the conventional VTR block configuration. With a similar connection
TV signals can be recorded. Next, during a period in which one character signal is superimposed, the output signal of the recording character signal superimposition position detection circuit 23 becomes high, turning on the switch circuits 17 and 18 and turning off the switch circuits 19. By turning on the switch circuit 17, the LPF circuit 2 is disabled.
ＶＴＲの記録帯域は文字信号を記録するに十分な帯域と
なる。また、スイッチ回路１９をオフとし色信号処理回
路を切離すことによ’） 、 ６２９ＫＪＩｚの低周波
色信号による文字信号への影響をなくすことができる。The recording band of a VTR is sufficient to record character signals. Furthermore, by turning off the switch circuit 19 and disconnecting the color signal processing circuit, it is possible to eliminate the influence of the 629KJIz low frequency color signal on the character signal.
さらに色信号への影響をなくすためのＨＰＦ回路６は不
要となシ文字信号への影響も考えスイッチ回路１８をオ
ンとしＨＰＦ回路６の効果を無効としている。以上のよ
うな回路構成であれば１文字信号をＶＴＲに記録でき、
しかも、これらの操作は文字信号が重畳されている期間
、すなわち垂直帰線期間であるため１通常のＴＶ傷信号
記録には何ら影響を与えない。Furthermore, considering the influence of the HPF circuit 6 on unnecessary color signals, the switch circuit 18 is turned on to nullify the effect of the HPF circuit 6. With the above circuit configuration, a single character signal can be recorded on a VTR,
Furthermore, since these operations occur during the period in which character signals are superimposed, that is, during the vertical retrace period, they have no effect on normal TV scratch signal recording.
次に、再生系について説明する。再生系文字信号重畳位
置検出回路２５かもの出力信号は、記録系と同様圧、第
５図（Ａ） Ｋ示す１文字信号が重畳されている期間の
み信号が出力される。また。Next, the reproduction system will be explained. The output signal of the reproduction system character signal superimposition position detection circuit 25 is the same as that of the recording system, and is output only during the period when one character signal shown in FIG. 5(A) K is superimposed. Also.
その出力信号はスイッチ回路２０ 、２１の制御信号と
して働く。まず１文字信号が重畳されていない期間は再
生系文字信号重畳位置検出回路２５の出力信号はロウと
なシ、スイッチ回路２０がオフ。The output signal serves as a control signal for the switch circuits 20 and 21. First, during a period in which one character signal is not superimposed, the output signal of the reproduction character signal superimposition position detection circuit 25 remains low, and the switch circuit 20 is turned off.
２１がオンとなシ従来のＶＴＲ再生系で再生される。次
に１文字信号が重畳されている期間では。21 is on, the video is played back using a conventional VTR playback system. Next, during the period when a single character signal is superimposed.
再生系文字信号重畳位置検出回路２５の出力信号はハイ
となり、スイッチ回路２０をオン、２１をオフとさせる
。スイッチ回路２０をオンとすることで、ＢＰＦ回路１
０の効果を無効として１文字信号の低域成分をそのまま
再生できる。また、スイッチ回路２１をオフとすること
で、記録されてＡない色信号の処理回路を切離し不要な
信号が文字信号に混入して再生されないようにする。The output signal of the reproduction character signal superimposition position detection circuit 25 becomes high, turning on the switch circuit 20 and turning off the switch circuit 21. By turning on the switch circuit 20, the BPF circuit 1
The low frequency component of a single character signal can be reproduced as is by nullifying the effect of 0. Further, by turning off the switch circuit 21, the processing circuit for the unrecorded color signal is disconnected, thereby preventing unnecessary signals from being mixed into the character signal and being reproduced.
なお、ＬＰＦ回路１４については輝度信号のキャリアを
取シ除くためのフィルタであｌ）、４ＭＨｚ程度をしゃ
断層波数としているため文字信号の再生に対して特に問
題がなく、従ってＬＰＦ回路１４は常にオンさせている
。以上のような回路構成であれば、記録されている文字
信号を再生でき、しかも、これらの操作は文字信号が重
畳されている期間、すなわち垂直帰線期間である 。Note that the LPF circuit 14 is a filter for removing the carrier of the luminance signal (l), and has a blocking wave number of about 4 MHz, so there is no particular problem with the reproduction of character signals, and therefore the LPF circuit 14 is always It's turned on. With the above circuit configuration, recorded character signals can be reproduced, and these operations can be performed during the period in which the character signals are superimposed, that is, the vertical retrace period.
ため１通常のＴＶ傷信号再生には何ら影響を及はさない
。しかし１文字信号の重畳期間では。Therefore, 1 normal TV scratch signal reproduction is not affected in any way. However, during the superimposition period of one character signal.
色信号処理回路を切離すためカラーバースト信号がなく
、そのために、映像信号の再生時に色同期がとれないと
いう問題がある。これを解決する一手段として、再生時
の映像期間のカラーバースト信号に同期した色副搬送波
を垂直帰線期間だけ持続させる色副搬送波発生回路２６
を設け、垂直帰線期間にスイッチ回路２７をオンさせて
色副搬送波発生回路２６からの信号を再生信号の垂直帰
線期間にカラーバースト信号と［２て付加する。Since the color signal processing circuit is separated, there is no color burst signal, and therefore, there is a problem that color synchronization cannot be achieved when the video signal is reproduced. As a means to solve this problem, a color subcarrier generation circuit 26 that maintains a color subcarrier synchronized with a color burst signal in a video period during playback for only a vertical retrace period
is provided, the switch circuit 27 is turned on during the vertical retrace period, and the signal from the color subcarrier generating circuit 26 is added to the color burst signal [2] during the vertical retrace period of the reproduced signal.
以上述べたよ５に本発明によれば１文字信号をＶＴＲに
記録再生できるので１文字放送サービスをいつでも受け
ることができ１個人用のＶＴＲだけでなく、業務用ＶＴ
Ｒにも適用でき。As mentioned above, according to the present invention, since a single character signal can be recorded and played back on a VTR, a single character broadcasting service can be received at any time, and it can be used not only for personal use but also for commercial use.
It can also be applied to R.
さらに９文字放送のソフトコピーが出来るため情報ファ
イルとして保存でき、ユーザーの利用範囲が広がるとい
う効果がある。Furthermore, since it is possible to make a soft copy of nine character broadcasts, it can be saved as an information file, which has the effect of widening the scope of use by users.
第１図は従来のＶＴＲのブロック図、第２図はＶＴＲの
記録帯域を示す周波数特性図、第３図は文字信号のスペ
クトル分布を示す周波数特性図、第４図は本発明のＶＴ
Ｒの一実施例を示すブロック図、第５図は文字信号の重
畳位置を示す波形図である。
１７〜２１・・・スイッチ回路、２３・・・記録系文字
信号重畳位置検出回路、２５・・・再生系文字信号重畳
位置検出回路、２６・・・色副搬送波発生回路。
オ １ 記
才 ２ 図
間液牧〔Ｍｌ２）
周波数〔Ｍｌ−１ｚＪFigure 1 is a block diagram of a conventional VTR, Figure 2 is a frequency characteristic diagram showing the recording band of the VTR, Figure 3 is a frequency characteristic diagram showing the spectral distribution of character signals, and Figure 4 is a diagram of the VT of the present invention.
FIG. 5 is a block diagram showing an embodiment of R. FIG. 5 is a waveform diagram showing superimposition positions of character signals. 17-21... Switch circuit, 23... Recording system character signal superimposition position detection circuit, 25... Reproduction system character signal superimposition position detection circuit, 26... Color subcarrier generation circuit. O 1 Kisei 2 Utsuma Rumaki〔Ml2) Frequency〔Ml-1zJ
Claims (1)
記録、再生する際に、記録時および再生時の少なくとも
いずれか一方において、テレビジ厘ン信号の垂直帰線期
間だけ磁気録画再生装置の輝度信号処理回路の周波数帯
域を広帯域化し１色値号は記録時再生時ともに輝度信号
と混合しないことを特徴とする文字信号のＶＴＲ記録再
生装買０1. When recording and reproducing a television signal in a magnetic recording and reproducing device, the brightness signal processing circuit of the magnetic recording and reproducing device is activated only during the vertical blanking period of the television signal during at least one of recording and reproduction. VTR recording and reproducing equipment for character signals characterized by widening the frequency band and not mixing one color value with the luminance signal during recording and reproduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57106909A JPS58223976A (en) | 1982-06-23 | 1982-06-23 | Vtr recorder and reproducer for character signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57106909A JPS58223976A (en) | 1982-06-23 | 1982-06-23 | Vtr recorder and reproducer for character signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58223976A true JPS58223976A (en) | 1983-12-26 |
| JPH0362076B2 JPH0362076B2 (en) | 1991-09-24 |
Family
ID=14445567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57106909A Granted JPS58223976A (en) | 1982-06-23 | 1982-06-23 | Vtr recorder and reproducer for character signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58223976A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977784A (en) * | 1982-10-25 | 1984-05-04 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| EP0159871A2 (en) * | 1984-04-12 | 1985-10-30 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and playback apparatus for teletext signals |
| JPS60216680A (en) * | 1984-04-12 | 1985-10-30 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| EP0172991A2 (en) * | 1984-08-23 | 1986-03-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Method and device for recording and reproducing colour video signals with data lines |
| JPS61123375A (en) * | 1984-11-20 | 1986-06-11 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| JPS61129773A (en) * | 1984-11-26 | 1986-06-17 | Pioneer Electronic Corp | Record information reproduction device |
| JPS61260792A (en) * | 1985-05-14 | 1986-11-18 | Akai Electric Co Ltd | Color signal recording system |
-
1982
- 1982-06-23 JP JP57106909A patent/JPS58223976A/en active Granted
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977784A (en) * | 1982-10-25 | 1984-05-04 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| JPH0141064B2 (en) * | 1982-10-25 | 1989-09-01 | Matsushita Electric Ind Co Ltd | |
| EP0159871A2 (en) * | 1984-04-12 | 1985-10-30 | Matsushita Electric Industrial Co., Ltd. | Magnetic recording and playback apparatus for teletext signals |
| JPS60216680A (en) * | 1984-04-12 | 1985-10-30 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| EP0172991A2 (en) * | 1984-08-23 | 1986-03-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Method and device for recording and reproducing colour video signals with data lines |
| EP0172991A3 (en) * | 1984-08-23 | 1987-11-11 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. | Method and device for recording and reproducing colour video signals with data lines |
| JPS61123375A (en) * | 1984-11-20 | 1986-06-11 | Matsushita Electric Ind Co Ltd | Video tape recorder |
| JPS61129773A (en) * | 1984-11-26 | 1986-06-17 | Pioneer Electronic Corp | Record information reproduction device |
| JPS61260792A (en) * | 1985-05-14 | 1986-11-18 | Akai Electric Co Ltd | Color signal recording system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0362076B2 (en) | 1991-09-24 |
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