JPS60162389A - Magnetic recording and reproduction device - Google Patents

Magnetic recording and reproduction device

Info

Publication number
JPS60162389A
JPS60162389A JP59017148A JP1714884A JPS60162389A JP S60162389 A JPS60162389 A JP S60162389A JP 59017148 A JP59017148 A JP 59017148A JP 1714884 A JP1714884 A JP 1714884A JP S60162389 A JPS60162389 A JP S60162389A
Authority
JP
Japan
Prior art keywords
head
reproduction
switch
signal
playback
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59017148A
Other languages
Japanese (ja)
Inventor
Haruo Inoue
晴夫 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59017148A priority Critical patent/JPS60162389A/en
Publication of JPS60162389A publication Critical patent/JPS60162389A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/93Regeneration of the television signal or of selected parts thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To enable variable reproduction from normal reproduction to double speed reproduction by providing two subheads having azimuth different from a main head adjacent to them, by repeating normal reproduction and double speed reproduction. CONSTITUTION:A reproduction output from each head is added to amplifiers 7- 10 through a rotary transformer 6, and a video FM signal and a low range conversion chroma signal are amplified. A head position detection signal is obtained through a PG coil 5 and amplifier 11, and a head switch signal 20 created by waveform-forming said signal switches a switches 13 and 14 to a tape touched head side. An envelope switch 15 is switched by an envelop switch signal 21 from a CPU12. Namely, the switch 15 is switched to a switch 13 side in normal reproduction, and switches it to the switch 14 side in still reproduction and high rate reproduction.

Description

【発明の詳細な説明】 (産業上の利用分野) 、本発明は、−殻内は画像磁気記録再生装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an image magnetic recording and reproducing device.

(従来例の構成とその問題点) 一般のホームビデオにおいて、ステイル再生。(Conventional configuration and its problems) Still playback in general home videos.

スロー再生、高速再生といった特殊再生機能が設けられ
ているが、高速再生の場合、例えばキャブズタン送シで
1.3倍速再生を考えると、再生出力のエンベロープは
第3図Bに示すようになり、画面上にノイズが現われる
。々お同図Sはヘッドスイッチングパルスでアル。
Special playback functions such as slow playback and high-speed playback are provided, but in the case of high-speed playback, for example, if we consider 1.3x playback with cab's tongue feed, the playback output envelope will be as shown in Figure 3B, Noise appears on the screen. In the same figure, S is a head switching pulse.

(発明の目的) 本発明は、通常再生から倍速再生までの可変速再生をノ
イズレスで行なえるようにすることを目的とする。
(Object of the Invention) An object of the present invention is to enable variable speed playback from normal playback to double speed playback without noise.

(発明の構成) 本発明の画像磁気記録再生装置は、180°割出しで互
いに異なったアジマスを有する2個の主ヘッドと、前記
主ヘッドに隣接して主ヘッドと異なったアジマスを有す
る2個の補助ヘッドでヘッドを構成し、通常再生及び倍
速再生を繰り返し、通常再生と倍速再生の時間の比率を
変えることにより、ノイズレスで通常再生から倍速再生
までの可変速再生を可能にしたものである。
(Structure of the Invention) The image magnetic recording and reproducing apparatus of the present invention includes two main heads indexed by 180° and having different azimuths, and two main heads adjacent to the main heads and having different azimuths from the main heads. The head is composed of an auxiliary head, repeats normal playback and double speed playback, and by changing the ratio of the time between normal playback and double speed playback, variable speed playback from normal playback to double speed playback is possible without noise. .

(実施例の説明) 第1図は本発明による磁気記録再生装置のブロ7り凶で
、1,2はそれぞれ主ヘッドのR,Lヘッド、3,4は
補助ヘッドのLl 、 L//ヘッドである。
(Description of Embodiments) FIG. 1 shows the magnetic recording/reproducing apparatus according to the present invention, in which 1 and 2 are main heads R and L heads, and 3 and 4 are auxiliary heads Ll and L//heads. It is.

各ヘッドからの再生出力は、ロータリトランス6を介し
て増幅器7〜10に加えられ、ビデオFM信号及び低域
変換クロマ信号が増幅される。またPCコイル5、増幅
器11を介して、図示しないシリンダの回転に同期して
ヘッド位置検出信号が得られ、これを波形成形したヘッ
ドスイッチ信号20により、テープタッチされているヘ
ッド側へスイッチ13.14を切り換える。そしてCP
U1.2カラノー1−ンヘo −f切換信号21でエン
ペローフ切換スイッチを切シ換える。即ち、通常再生で
はスイッチ15はスイッチ13側に、またステイル再生
、高速再生ではスイッチ14側に切り換える。16は映
像信号のFM復調回路でありFM信号はここで復調され
る。17はクロマ復調回路でありクロマ再生基準信号回
路18の出力を受けて、低域変換されたクロマ信号の通
常の3.58 MHzに変換する。これらの信号はミキ
シング回路19でミキシングされビデオ出力される。
The reproduction output from each head is applied to amplifiers 7 to 10 via a rotary transformer 6, and the video FM signal and the low frequency conversion chroma signal are amplified. Further, a head position detection signal is obtained via the PC coil 5 and the amplifier 11 in synchronization with the rotation of a cylinder (not shown), and a head switch signal 20 obtained by shaping the signal into a waveform is used to direct the switch 13 . Switch 14. And C.P.
Use the U1.2 Karano 1-Hen o-f changeover signal 21 to change over the envelope changeover switch. That is, the switch 15 is switched to the switch 13 side for normal playback, and to the switch 14 side for still playback or high-speed playback. 16 is an FM demodulation circuit for video signals, and the FM signal is demodulated here. Reference numeral 17 denotes a chroma demodulation circuit which receives the output of the chroma reproduction reference signal circuit 18 and converts it to the normal 3.58 MHz of the low frequency converted chroma signal. These signals are mixed by a mixing circuit 19 and output as a video.

第2図は本発明によるヘッド、シリンダの構成を示す図
で、■及び2は18(1″割出しで、互いに異なったア
ジマスを有する2個の主ヘッドであり、3及び4は主ヘ
ッドに隣接して(例えば2水平走査期間)、主ヘッドと
異なったアジマスを有する補助ヘッドであシ、Rヘッド
1とLヘッド2は通常再生の時使用し L/ヘッド3と
L“ヘッド4によりそれ以外の再生、例えば倍速再生を
行なう。
Fig. 2 is a diagram showing the structure of the head and cylinder according to the present invention, where ■ and 2 are two main heads with 18 (1'' index) and different azimuths, and 3 and 4 are the main heads. Auxiliary heads that are adjacent (for example, two horizontal scanning periods) and have a different azimuth from the main head, R head 1 and L head 2 are used during normal playback, and L/head 3 and L'' head 4 are used for normal playback. For example, playback at double speed is performed.

24は回転シリンダ、25はテープ、26はポストであ
る。
24 is a rotating cylinder, 25 is a tape, and 26 is a post.

そして、CPU12からのエンベロープの切換は、通常
再生から倍速再生への移行時においては倍速再生時にエ
ンベロープが最大となるタイミングで、また倍速再生か
ら通常再生への移行時においては通常再生時にエンベロ
ープが最大となるタイミングで行なう。こうすることに
より画面上にノイズの現われるのを防止することができ
る。そして通常再生と倍速再生を繰り返し、通常再生と
倍速再生の時間の比率を変化させることにより、通常再
生から倍速再生までの可変速再生をノイズレスで行なう
ことが可能となる。(第3図B)。
The envelope is switched from the CPU 12 at the timing when the envelope reaches its maximum during double-speed playback when transitioning from normal playback to double-speed playback, and when the envelope reaches its maximum during normal playback when transitioning from double-speed playback to normal playback. Do it at the right time. By doing this, it is possible to prevent noise from appearing on the screen. By repeating normal playback and double speed playback and changing the ratio of time between normal playback and double speed playback, variable speed playback from normal playback to double speed playback can be performed without noise. (Figure 3B).

(発明の効果) 以上のように本発明によれば、通常再生から倍速再生ま
での可変速再生ノイズレスで行なうことができる。
(Effects of the Invention) As described above, according to the present invention, variable speed reproduction from normal reproduction to double speed reproduction can be performed without noise.

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

第1図は本発明による磁気記録装置のブロック図、第2
図は本発明によるヘッド、シリンダの構成図、第3図は
テープパターンをトレースするヘッドの軌跡を示す図で
ある。 ■・・・Rヘッド(主ヘッド)、2・・・Lヘッド(主
ヘッド)、3・・・L′ヘッド(補助ヘッド)、4・・
・L”ヘッド(補助ヘッド)、5・・・PGコイル、6
・・・ロータリートランス、7・・・Rヘッド増幅器、
8・・・Lヘッド増幅器、9・・・L′ヘッド増幅器、
10・・・L〃ヘッド増幅器、11・・・増幅器、12
・・・CPU、13・・・主ヘツド切換スイッチ、14
・・・補助ヘッド切換スイッチ、15・・・エンペロー
フ切換スイッチ、16・・・FM復調回路、17・・・
クロマ復調回路、18・・・クロマ再生基準信号回路、
19・・・ミキシング回路、20・・・ヘッドスイッチ
信号、21・・・エンベロープ切換信号、22・・・カ
ラーロータリー切換信号、23・・・エンベロープ、2
4・・・回転シリンダ、25・・・テープ、26・・・
ポスト。
FIG. 1 is a block diagram of a magnetic recording device according to the present invention, and FIG.
The figure is a block diagram of the head and cylinder according to the present invention, and FIG. 3 is a diagram showing the locus of the head tracing the tape pattern. ■...R head (main head), 2...L head (main head), 3...L' head (auxiliary head), 4...
・L” head (auxiliary head), 5...PG coil, 6
...Rotary transformer, 7...R head amplifier,
8... L head amplifier, 9... L' head amplifier,
10...L head amplifier, 11... amplifier, 12
...CPU, 13...Main head changeover switch, 14
...Auxiliary head selection switch, 15...Empeloaf selection switch, 16...FM demodulation circuit, 17...
Chroma demodulation circuit, 18... chroma reproduction reference signal circuit,
19... Mixing circuit, 20... Head switch signal, 21... Envelope switching signal, 22... Color rotary switching signal, 23... Envelope, 2
4... Rotating cylinder, 25... Tape, 26...
post.

Claims (1)

【特許請求の範囲】[Claims] 180°割出しで互いに異なったアジマスを有する2個
の主ヘッドと、前記主ヘッドに隣接して主ヘッドと異な
ったアジマスを有する2個の補助ヘッドとを備え、通常
再生及び倍速再生を繰り返し、通常再生と倍速再生の時
間の比率を変えることにより、ノイズレスで通常再生か
ら倍速再生までの可変速再生を可能にしたことを特徴と
する磁気記録再生装置。
Two main heads indexed by 180° and having different azimuths from each other, and two auxiliary heads adjacent to the main heads having different azimuths from the main heads, repeating normal playback and double speed playback, A magnetic recording/reproducing device characterized in that variable speed playback from normal playback to double speed playback is possible without noise by changing the time ratio between normal playback and double speed playback.
JP59017148A 1984-02-03 1984-02-03 Magnetic recording and reproduction device Pending JPS60162389A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59017148A JPS60162389A (en) 1984-02-03 1984-02-03 Magnetic recording and reproduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59017148A JPS60162389A (en) 1984-02-03 1984-02-03 Magnetic recording and reproduction device

Publications (1)

Publication Number Publication Date
JPS60162389A true JPS60162389A (en) 1985-08-24

Family

ID=11935902

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59017148A Pending JPS60162389A (en) 1984-02-03 1984-02-03 Magnetic recording and reproduction device

Country Status (1)

Country Link
JP (1) JPS60162389A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262677A (en) * 1985-09-12 1987-03-19 Sharp Corp Magnetic recording and reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6262677A (en) * 1985-09-12 1987-03-19 Sharp Corp Magnetic recording and reproducing device

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