JPS6361583A - Recording and reproducing device - Google Patents

Recording and reproducing device

Info

Publication number
JPS6361583A
JPS6361583A JP61205435A JP20543586A JPS6361583A JP S6361583 A JPS6361583 A JP S6361583A JP 61205435 A JP61205435 A JP 61205435A JP 20543586 A JP20543586 A JP 20543586A JP S6361583 A JPS6361583 A JP S6361583A
Authority
JP
Japan
Prior art keywords
signal
dropout
recording
clock signal
supplied
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP61205435A
Other languages
Japanese (ja)
Other versions
JPH0722370B2 (en
Inventor
Hiroshi Kitaura
坦 北浦
Yuichi Ninomiya
佑一 二宮
Yoshimichi Otsuka
吉道 大塚
Yoshinori Izumi
吉則 和泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Broadcasting Corp
Panasonic Holdings Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Hoso Kyokai NHK, Japan Broadcasting Corp, Matsushita Electric Industrial Co Ltd filed Critical Nippon Hoso Kyokai NHK
Priority to JP61205435A priority Critical patent/JPH0722370B2/en
Publication of JPS6361583A publication Critical patent/JPS6361583A/en
Publication of JPH0722370B2 publication Critical patent/JPH0722370B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To reduce the number of connecting wires and to prevent a monitoring picture from disappearing or going to noisy even if a failure such at the power source of a VTR is turned OFF or a connecting write is disconnected happens during reproducing by using a wire for a clock signal and a dropout detecting signal in common. CONSTITUTION:A dropout of signal happening during VTR reproducing is detected by a circuit 27, a reproduced signal is supplied to a receiver as a digital image data, and simultaneously a gate 28 is closed by the said dropout detecting signal to block a clock signal to be supplied. In the receiver, an internal reference oscillator 32 is controlled based on a clock signal supplied from a recording and reproducing device to synchronize the signals in phase, at the time, the image data is demodulated to original high-vision signals by a MUSE decoder 31. The period in which the clock signal is blocked because of dropout, a phase controlling signal to the internal reference oscillator 32 is held in a value immediately before the said blocking to prevent disorder in oscillation, and at the same time, dropout compensation is executed by using the MUSE decoder 31.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はテレビジョン信号の記録再生装置に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a recording and reproducing apparatus for television signals.

従来の技術 現行の標準テレビジョン方式に比べより高精細度な画像
が讐られるハイビジョンの映像信号を、放送衛星の27
MIIZ帯域幅の1チヤンネルを用いて伝送する帯域圧
縮伝送方式が提案されている。
Conventional technology High-definition video signals, which provide higher-definition images than the current standard television system, are transmitted by broadcasting satellites on 27
A band compression transmission method has been proposed in which transmission is performed using one channel of MIIZ bandwidth.

参考文献:二宮佑−他、「高品位テレビの衛星1チャン
ネル伝送方式(uusE)j、テレビジョン学会技術報
告方式回路研究会、TEBS95−2.昭和69年3月
22日、テレビ学技報VOL −7、五’a a ここに示しである伝送方式は、サブナイキストサンプリ
ングによって本来20MIIz以上の帯域を有するハイ
ビジョン(高品位チンピ)信号を約8M Hzに帯域圧
縮し、伝送するもので、静止画像の場合は4フィールド
即ち2フレームで1枚の画像の伝送が完結する。従って
受信機内部には伝送信号レート換算で2フレ一ム分のメ
モリを持っており伝送されて来るテレビジョン信号をフ
レーム間補完することにより1枚の画像を完成している
References: Tasuku Ninomiya et al., “High Definition Television Satellite One Channel Transmission System (UUSE)j, Television Society Technical Report System Circuit Study Group, TEBS95-2. March 22, 1986, Television Science Technical Report VOL -7, 5'a a The transmission method shown here uses sub-Nyquist sampling to compress the high-definition signal, which originally has a band of 20 MIIz or more, to about 8 MHz and transmits it. In this case, the transmission of one image is completed in 4 fields, that is, 2 frames.Therefore, the receiver has a memory for 2 frames in terms of the transmission signal rate, and the transmitted television signal is stored in a frame. A single image is completed by interpolation.

−万本方式によりハイビジョン信号は20 M Hz以
上の帯域からsM[Iz程度まで帯域圧縮されているの
で、衛星放送だけではなく記録再生の面からも有用であ
p、VTR,ビデオディスク等が考えられている。なお
これらの記録された信号を再生する時に、将来的にはV
TR、ビデオディスク等の本体内に、前記受信装置に含
まれているMUSEデコーダが内蔵されるであろうが、
当面は受信装置と組み合わせて用いられることになると
思われる。
- Because the high-definition signal is band-compressed from a band of 20 MHz or higher to about sM [Iz] using the Manbon system, it is useful not only for satellite broadcasting but also for recording and playback, and is useful for recording, playing, etc. It is being In the future, when playing back these recorded signals, V
The MUSE decoder included in the receiving device may be built into the main body of the TR, video disc, etc.
For the time being, it seems that it will be used in combination with a receiving device.

従来’/TR、ビデオディスク等の記録再生装置とチュ
ーナ、モニタ等との信号の接続はNTSCのコンポジッ
ト信号をアナログの状態で行なっているが、特にハイビ
ジョン信号では20 M tlz帯域のベースバンドの
状態での撮像、記録等が必要であり、広帯域信号の信号
処理、即ち輪郭補償やタイムベースコレクタ等ではディ
ジタル信号処理が必要となり、その都度アナログ−ディ
ジタル変換及びディジタル−アナログ変換(以下A/D
 。
Conventionally, signals are connected between recording and playback devices such as '/TR and video discs and tuners, monitors, etc. using NTSC composite signals in analog form, but especially high-definition signals use baseband signals in the 20 M tlz band. Digital signal processing is required for wideband signal processing, such as contour compensation and time base correction, and analog-to-digital conversion and digital-to-analog conversion (hereinafter referred to as A/D
.

D/Aと称する)を繰り返すことになりそれに供う画質
劣化が起こる恐れがある。更に受信装置のMUS!デコ
ーダ部分もディジタル信号処理であるため、もしVTR
に記録するため受信装置とのインタフェイスをアナログ
信号でやりとりするとすれば、更にA/D、D/Aと繰
シ返すことになり、画質が一段と劣化する可能性もある
。そこで受信装置とVTRのインタフェイスをディジタ
ル信号の状態で行うことによりA/D、D/Aの回数を
減らすことが考えられる。装置間の信号のインタフェイ
スをディジタルで行う場合のブロック図を第2図に示す
(referred to as D/A) is repeated, and there is a risk that the image quality will deteriorate accordingly. Furthermore, the receiving device MUS! Since the decoder part is also digital signal processing, if
If analog signals are exchanged at the interface with the receiving device for recording, the A/D and D/A operations will be repeated, which may further deteriorate the image quality. Therefore, it may be possible to reduce the number of A/D and D/A operations by interfacing the receiving device and the VTR in the form of digital signals. FIG. 2 shows a block diagram when the signal interface between devices is performed digitally.

第2図において1は衛星放送のSHF電波を受信し、選
局してFM復調するBSチューナ、2は復調された信号
をディジタル信号に変換するA/D。
In FIG. 2, 1 is a BS tuner that receives SHF radio waves from satellite broadcasting, selects a channel, and demodulates the FM, and 2 is an A/D that converts the demodulated signal into a digital signal.

3はディエンファシス等とディジタルで行う前処理回路
、4は入力信号切換スイッチで、一端はディエンファシ
ス3出力に、もう一端は”/TR等の外部信号と接続さ
れている。6はMUSKデコーダ本体、6はD/A、7
はノ・イビジョン信号全映出するモニタ、8はVTRの
記録のだめの時間軸伸張等を行う信号処理部、9はD/
ム、10はFM変調し、テープ等に記録、再生し再びF
M復調する記録再生部、11は人/D、12は再生信号
のジッタ全とるTBC及びVTR記録のために時間軸伸
張処理された信号音もとのMUSE信号に変換する時間
軸圧縮等の信号処理部である。同図においては1〜6が
受信装置、8〜12がVTR等記録再生装置をあられし
ている。
3 is a digital preprocessing circuit that performs de-emphasis, etc., 4 is an input signal changeover switch, one end is connected to the de-emphasis 3 output, and the other end is connected to an external signal such as "/TR". 6 is the MUSK decoder main body , 6 is D/A, 7
8 is a signal processing unit that expands the time axis of the VTR recording, and 9 is a D/
FM, 10 is FM modulated, recorded on tape etc., played back, and then F again.
11 is a recording and reproducing unit that demodulates the signal; 11 is a human/D signal; 12 is a signal for time axis compression, etc. that converts the signal sound that has been subjected to time axis expansion processing for TBC and VTR recording to the original MUSE signal, which removes all jitter from the reproduced signal; This is the processing section. In the figure, 1 to 6 are receiving devices, and 8 to 12 are recording and reproducing devices such as VTRs.

発明が解決しようとする問題点 記録再生装置と受信装置をディジタルインタフェイスと
した場合は、アナログインクフェイスの場合に比べてA
/D、D/Aを通る回数は各1回ずつ少くなっていると
いう利点がある。しかし、アナログの場合は同軸ケーブ
ル1本で良いのに比べてディジタルの場合は例えば8ビ
ツトの画像データとすればクロック信号と接地線を含め
て10本の信号線が必要である。更に、VTR等ではド
ロップアウトと称する再生FM信号の欠落が生ずるので
、通常はVTR内でラインメモリを用いて1水平走査期
間(以下1Hと称する)前の信号を埋め合わせているが
、MUSE信号の場合はデコーダ内のフレームメモリを
用いて2フレーム前の信号を埋め合わせる必要があり、
そのためにVTRから受信装置にドロップアウト期間を
伝えるためにもう1本の信号線を必要としていた。受信
装置及び記録再生装置の性格上、民生レベルの商品が主
流となるので信号線等はできるだけ少い刀が望ましく、
また記録側の接続線としてはドロップアウトパルス伝送
用信号線は不用でもあるので共用させるという意味から
もドロップアウトパルス伝送用の信号線が増加すること
は好ましくないという問題点がちった。
Problems to be Solved by the Invention When the recording/reproducing device and the receiving device are digital interfaces, the A
There is an advantage that the number of passes through /D and D/A is reduced by one each. However, in the case of analog, one coaxial cable is sufficient, but in the case of digital, for example, 8-bit image data requires 10 signal lines including a clock signal and a ground line. Furthermore, in VTRs, etc., a loss of the reproduced FM signal called dropout occurs, so normally a line memory is used in the VTR to compensate for the signal from one horizontal scanning period (hereinafter referred to as 1H), but when the MUSE signal In this case, it is necessary to use the frame memory in the decoder to compensate for the signal from two frames ago.
Therefore, another signal line was required to convey the dropout period from the VTR to the receiving device. Due to the nature of the receiving device and recording/playback device, consumer level products are the mainstream, so it is desirable to have as few signal lines as possible.
Further, since the signal line for transmitting dropout pulses is not needed as a connection line on the recording side, there is a problem that it is not desirable to increase the number of signal lines for transmitting dropout pulses from the point of view of shared use.

問題点を解決するだめの手段 本発明は前記記録再生装置と受信装置のインタフェイス
において、受信装置で前処理を施した後、1組のディジ
タル画像データとしてクロック信号とともに記録再生装
置に供給して記録し、再生時には、記録再生装置にて再
生され、信号処理を施された1組のディジタル画像デー
タと、クロック信号が受信装置に供給され、受信装置で
は前記供給されたクロック信号に基づいて内部基準発振
器の発振周波数及び位相を制御するとともに、前記記録
再生装置においてドロップアウトが発生した時は前記再
生信号の画像データとともに供給されるクロック信号を
前記ドロップアウトの期間遮断し、前記受信装置におい
てはクロックが遮断されたことを検出して内部に持って
いるメモリによシドロップアウ!・補償を打うとともに
内部基準発振器の制御信号を、クロック信号が遮断され
る直前の値に保持する様に構成したことを特徴とする記
録再生装置である。
Means for Solving the Problems The present invention provides, at the interface between the recording and reproducing apparatus and the receiving apparatus, a set of digital image data that is preprocessed by the receiving apparatus and then supplied to the recording and reproducing apparatus together with a clock signal. When recording and reproducing, a set of digital image data that has been reproduced by the recording and reproducing device and subjected to signal processing and a clock signal are supplied to the receiving device, and the receiving device performs internal processing based on the supplied clock signal. In addition to controlling the oscillation frequency and phase of the reference oscillator, when a dropout occurs in the recording and reproducing device, the clock signal supplied together with the image data of the reproduced signal is cut off for the period of the dropout, and in the receiving device. It detects that the clock has been cut off and uses its internal memory to drop out! - A recording/reproducing device characterized in that it is configured to perform compensation and hold the control signal of the internal reference oscillator at the value immediately before the clock signal was cut off.

作用 本発明は上記手段で説明した構成により、VTR再生中
に生じたドロップアラ)を検出して再生信号をディジタ
ル画像データとして受信装置に供給すると平行して供給
するクロック信号を前記ドロップアウト検出信号でゲー
トして遮断し、−万受信装置においては前記記録再生装
置よシ供給せられたクロック信号に基づいて内部基準発
振器を制御し位相同期をかけるとともに画像データi 
MUSEデコーダでもとのハイビジョン信号に復調する
Operation The present invention uses the configuration explained in the above means to detect drop errors that occur during VTR playback and supply the reproduced signal as digital image data to the receiving device, and then convert the clock signal supplied in parallel to the dropout detection signal. In the receiver, the internal reference oscillator is controlled and phase synchronized based on the clock signal supplied from the recording/reproducing device, and the image data i
The MUSE decoder demodulates it to the original high-definition signal.

またドロップアウトによりクロック信号が遮断された期
間は前記内部基準発振器の位相制御信号を遮断される直
前の値にホールドして発振の乱れを阻止するとともにM
tJSEデコーダ内のメモリを利用してドロップアウト
補償を行わせようとするものである。
In addition, during the period when the clock signal is cut off due to dropout, the phase control signal of the internal reference oscillator is held at the value immediately before the cutoff to prevent disturbance of oscillation, and
This method attempts to perform dropout compensation using memory within the tJSE decoder.

実施例 以下具体的な実施例について説明する。第1図は記録再
生装置の再生系と受信装置のMUSF、デコーダ部分に
ついて本発明に基づいたブロック図を示したものである
EXAMPLES Specific examples will be described below. FIG. 1 shows a block diagram of a reproducing system of a recording/reproducing apparatus, a MUSF of a receiving apparatus, and a decoder section based on the present invention.

同図において、2oは受信装置、21は記録再生装置を
示している。22はテープ・ヘッド系、23はF、M復
調回路、24はA/D変換器、26は第2図で説明した
時間軸圧縮、TBC等の信号処理回路、26は内部基準
発振器を含むクロック信号発生器、27は再生FM信号
よシトロツブアウトを検出する回路、28は受信装置に
供給すbクロック信号を、前記ドロップアウト検出信号
に基づいてゲートするクロックゲート回路、29は8ビ
ツトのディジタル画像データの信号線、30はクロック
信号の信号線を示す。31は再生されたディジタル画像
データの状態のMUSE信号をハイビジョン信号に復調
するMUSXデコーダ、32は供給されたクロック信号
に基づいて、内部基準発振器の発振周波数を分周して得
られた内部クロックと位相比較し、常に位相差が偽とな
る様に前記発振器の発振位相を制御する所謂PLL回路
を構成するクロック発生器で、もし入力クロック信号が
遮断された場合は内部クロックとの位相比較出力を遮断
するとともにクロック筐断直前の値を保持して発振位相
がゆすられることを阻止するようになっている。
In the figure, 2o indicates a receiving device, and 21 indicates a recording/reproducing device. 22 is a tape head system, 23 is an F and M demodulation circuit, 24 is an A/D converter, 26 is a signal processing circuit such as time base compression and TBC explained in FIG. 2, and 26 is a clock including an internal reference oscillator. a signal generator; 27 is a circuit for detecting dropout from the reproduced FM signal; 28 is a clock gate circuit for gating the b clock signal supplied to the receiving device based on the dropout detection signal; 29 is an 8-bit digital A signal line 30 for image data is a signal line for a clock signal. 31 is a MUSX decoder that demodulates the MUSE signal in the state of reproduced digital image data into a high-definition signal, and 32 is an internal clock obtained by dividing the oscillation frequency of the internal reference oscillator based on the supplied clock signal. A clock generator that composes a so-called PLL circuit that compares the phases and controls the oscillation phase of the oscillator so that the phase difference is always false.If the input clock signal is cut off, the output of the phase comparison with the internal clock is output. At the same time, the value immediately before the clock is cut off is held to prevent the oscillation phase from being fluctuated.

なお、ドロップアウトは通常は数μs〜数1゜μS程度
の短いものであるのでPLL回路にとってはこの程度の
遮断は全く影響がない。33は前記供給されたクロック
信号を常に監視しており、もし遮断された場合はその期
間に相当するパルスを前記MUSEデコーダ31及びク
ロック発生器32に供給するクロック遮断検出回路であ
る。なおMUSEデコーダではドロップアウトの補償は
、内部に持っている2フレームメモリの新しい画像デー
タによる書き込みを前記ドロップアウトの期間だけ止め
、実質的に2フレーム前のデータとすることにより行っ
ているが、この補償の方法は他にも種々考えられること
は言うまでもない。
Note that since the dropout is normally short, from several μs to several 1° μs, this level of interruption has no effect on the PLL circuit. Reference numeral 33 denotes a clock cutoff detection circuit which constantly monitors the supplied clock signal and, if cut off, supplies a pulse corresponding to the period to the MUSE decoder 31 and clock generator 32. Note that in the MUSE decoder, compensation for dropouts is achieved by stopping writing of new image data into the internal 2-frame memory for the dropout period, essentially setting the data to 2 frames earlier. It goes without saying that various other methods of compensation can be considered.

第3図はドロップアウトによりクロックが遮断されるま
での各部の信号の状態を示したもので、同図体)はFM
再生信号で40はFM波、41はドロップアウトにより
FM波が途切れたところ、(b)はFM復調波形で42
は通常の映像信号が復調されたところ、43はドロップ
アウトにより大きなノイズとなっていることを示す。(
C)はドロップアウト検出パルスで44がドロップアウ
ト期間を示す。(d)は受信装置に供給するクロック信
号で46は正常に再生されている期間、46はドロップ
アウト期間でクロックが遮断されているところを示す。
Figure 3 shows the signal status of each part until the clock is cut off due to dropout.
In the reproduced signal, 40 is the FM wave, 41 is where the FM wave is interrupted due to dropout, and (b) is the FM demodulation waveform at 42
43 indicates that a normal video signal has been demodulated, and that there is a large amount of noise due to dropout. (
C) is a dropout detection pulse, and 44 indicates a dropout period. (d) shows a clock signal supplied to the receiving device, 46 shows a period during which the signal is normally reproduced, and 46 shows a dropout period in which the clock is cut off.

但し同図は原理図であって実際には詳細なタイミング等
は本図と異なることがあることは勿論である。
However, this figure is a diagram of the principle, and it goes without saying that the detailed timing etc. may differ from this figure in reality.

なお本実施例では各回路はすべて公知であるので詳細な
説明は省略する。
In this embodiment, all the circuits are well known, so detailed explanations will be omitted.

発明の効果 本発明によれば、記録再生装置と受信装置のインタフェ
イスをディジタル信号で行う場合に必然的に信号線の本
数が増加するが、クロック信号とドロップアウト検出信
号線を共用とすることによシ接続線の本数を減少させ、
またそのために記録側の接続線と共用可能とすることが
できる様になる。更に、もし再生中にVTRの電源が切
れるとか、あるいは接続線が外れるとかの事故が起った
場合もクロック信号が遮断されるためMUSEデコーダ
で自動的にフレームスチル(静止画像)となりモニタ画
面が消えたりノイズとなることを防ぎ、非常に品位の高
い受信装置及び記録再生装置を提供できる等、効果の犬
なるものである。
Effects of the Invention According to the present invention, when the recording/reproducing device and the receiving device are interfaced with digital signals, the number of signal lines inevitably increases, but the clock signal and dropout detection signal line can be shared. By reducing the number of connecting wires,
Also, for this purpose, it becomes possible to share the connection line with the recording side. Furthermore, if an accident occurs such as the power to the VTR being cut off during playback or the connection wire being disconnected, the clock signal will be cut off and the MUSE decoder will automatically turn the monitor screen into a frame still (still image). It is highly effective in that it can prevent noise from disappearing or become noise, and can provide a receiving device and a recording/reproducing device of very high quality.

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

第1図は本発明の一実施例における記録再生装置の再生
系と受信装置のMUSEデコーダ部分についてのブロッ
ク図、第2図は従来例における受信装置と記録再生装置
のディジタルインタフェイスにおける接続例を示したブ
ロック図、第3図は本発明における各部の信号波形を示
した図である。 2Q・・・・・・受信装置、21・・・・・・記録再生
装置、22・・・・・・テープ・ヘッド系、23・・・
・・・FM復調回路、24・・・・・・A/D、25・
・・・・・信号処理回路、26・・・・・・クロック発
生器、27・・・・・・ドロップアウト検出回路、28
・・・・・・クロックゲート回路、29・・・・・・デ
ィジタル画像データ信号線、3Q・・・・・・クロック
信号線、31・・・・・・MUSEデコーダ、32・・
・・・・クロック発生器、33・・・・・・クロック遮
断検出回路。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 、ヲl 第2図 第3図
FIG. 1 is a block diagram of the playback system of a recording/playback device and the MUSE decoder portion of a receiving device in an embodiment of the present invention, and FIG. 2 is a connection example of a digital interface between a receiving device and a recording/playback device in a conventional example. The block diagram shown in FIG. 3 is a diagram showing signal waveforms of each part in the present invention. 2Q... Receiving device, 21... Recording and reproducing device, 22... Tape head system, 23...
...FM demodulation circuit, 24...A/D, 25.
... Signal processing circuit, 26 ... Clock generator, 27 ... Dropout detection circuit, 28
... Clock gate circuit, 29 ... Digital image data signal line, 3Q ... Clock signal line, 31 ... MUSE decoder, 32 ...
... Clock generator, 33 ... Clock cutoff detection circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

【特許請求の範囲】[Claims] アナログ入力テレビジョン信号をディジタル信号に変換
し、ディエンファシス等の信号処理を施した後1組のデ
ィジタル画像データとしてクロック信号とともに記録再
生装置に供給して記録し、再生時には、記録再生装置に
て再生され、信号処理を施された1組のディジタル画像
データと、クロック信号が受信装置に供給され、受信装
置では前記供給されたクロック信号に基づいて内部基準
発振器の発振周波数及び位相を制御するとともに、前記
記録再生装置においてドロップアウトが発生した時は前
記再生信号の画像データとともに供給されるクロック信
号と前記ドロップアウトの期間遮断し、前記受信装置に
おいてはクロックが遮断されたことを検出して内部に保
有している記憶装置によりドロップアウト補償を行うと
ともに内部基準発振器の制御信号を、クロック信号が遮
断される直前の値に保持する様に構成したことを特徴と
する記録再生装置。
After converting the analog input television signal into a digital signal and subjecting it to signal processing such as de-emphasis, it is supplied as a set of digital image data along with a clock signal to a recording/reproducing device for recording. A set of reproduced and signal-processed digital image data and a clock signal are supplied to a receiving device, and the receiving device controls the oscillation frequency and phase of an internal reference oscillator based on the supplied clock signal. When a dropout occurs in the recording/reproducing device, the clock signal supplied together with the image data of the reproduced signal is cut off for the period of the dropout, and the receiving device detects that the clock is cut off and performs internal processing. What is claimed is: 1. A recording/reproducing device characterized in that the recording/reproducing device is configured to perform dropout compensation using a storage device included in the internal reference oscillator and to hold a control signal for an internal reference oscillator at a value immediately before a clock signal is cut off.
JP61205435A 1986-09-01 1986-09-01 Recording / playback device Expired - Lifetime JPH0722370B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61205435A JPH0722370B2 (en) 1986-09-01 1986-09-01 Recording / playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61205435A JPH0722370B2 (en) 1986-09-01 1986-09-01 Recording / playback device

Publications (2)

Publication Number Publication Date
JPS6361583A true JPS6361583A (en) 1988-03-17
JPH0722370B2 JPH0722370B2 (en) 1995-03-08

Family

ID=16506819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61205435A Expired - Lifetime JPH0722370B2 (en) 1986-09-01 1986-09-01 Recording / playback device

Country Status (1)

Country Link
JP (1) JPH0722370B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0373087U (en) * 1989-11-20 1991-07-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0373087U (en) * 1989-11-20 1991-07-23

Also Published As

Publication number Publication date
JPH0722370B2 (en) 1995-03-08

Similar Documents

Publication Publication Date Title
US4943858A (en) TV signal recording and reproducing apparatus employing a digital interface and including signal drop-out compensation
JPS6361583A (en) Recording and reproducing device
US4686582A (en) Head switching in high resolution video reproduction apparatus
JP3120550B2 (en) Digital video tape recorder with camera
JPS59154887A (en) Video signal receiver
JPH0416084A (en) Method and apparatus for scrambling television signal
JPH065937B2 (en) Video signal recording method, video signal recording apparatus, and recording / reproducing apparatus
JP2708196B2 (en) Multiple subsampling signal adapter device
JP2999525B2 (en) Hi-vision receiver control method and device
JPS6367984A (en) Television receiver
US6137942A (en) Video recording medium for stop-motion playback
JPH0413897Y2 (en)
JP2523010B2 (en) Clamp pulse control circuit
JP2517335B2 (en) High-definition television signal receiver
JP3021623B2 (en) Descramble device
JPH084338B2 (en) Disk playback device
JP2613242B2 (en) Multi-signal recording / playback device
JP2594182B2 (en) MUSE decoder
JPS6119293A (en) Magnetic recording and reproducing device
JPH0197083A (en) Device for regeneration teletext signal
JPH04104679A (en) Transmission system for high-definition television signal
JPH0884320A (en) Video disk reproduction device and display system using it
JPH02203685A (en) Video signal recording reproducing method
JPH0245398B2 (en)
JPS59165586A (en) Television signal receiver

Legal Events

Date Code Title Description
R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term