JPS639004A - Magnetic recording and reproducing device - Google Patents

Magnetic recording and reproducing device

Info

Publication number
JPS639004A
JPS639004A JP15303286A JP15303286A JPS639004A JP S639004 A JPS639004 A JP S639004A JP 15303286 A JP15303286 A JP 15303286A JP 15303286 A JP15303286 A JP 15303286A JP S639004 A JPS639004 A JP S639004A
Authority
JP
Japan
Prior art keywords
recording
signal
follow
magnetic
reproduced
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
JP15303286A
Other languages
Japanese (ja)
Inventor
Satoshi Onodera
聡 小野寺
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP15303286A priority Critical patent/JPS639004A/en
Publication of JPS639004A publication Critical patent/JPS639004A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To attain follow-up recording based upon the same track recording system for video and sound by providing the titled device with magnetic heads for erasing a recording signal from a reproduced track and magnetic heads for recording a signal delayed by one frame period. CONSTITUTION:A video signal and a sound signal frequency-multiplexedly recorded on the same track are reproduced by magnetic heads 2a, 2b, 3a, 3b. The reproduced signals are supplied to a recording amplifier circuit 18 through a reproducing amplifier circuit 15, a frame delay circuit 16 and a change-over switch 17, but a signal from a follow-up picture recording circuit 19 or a follow-up sound recording circuit 20 is supplied to the circuit side turned by the switch 17 in stead of the reproduced signal. Thereby, the reproduced signal is erased by the erasing magnetic head 14, and after the passage of one frame period, a signal outputted from the circuit 19 or 20 through the magnetic heads 12a, 12b, 13a, 13b and the reproduced signal are recorded.

Description

【発明の詳細な説明】 [産業上の利用分野コ この発明は、後追い録画と後追い録音を可能にした磁気
記録再生装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording and reproducing device that enables follow-up recording and follow-up recording.

[従来の技術] 一般家庭用のビデオテープレコーダには、音声信号をP
M変調して映像信号と同一トラック上に周波数多重記録
する、いわゆる音声ハイファイ記録方式の磁気記録再生
装置がある。この種の磁気記録再生装置の音声記録方法
には、映像信号専用の磁気ヘッドの外に音声信号専用の
磁気ヘッドを設ける方式と、映像も音声も同一の磁気ヘ
ッドにより記録する方式の2方式があるが、いずれの方
式も映像信号を構成する輝度信号と色信号の周波数帯域
の中間に、FM変調音声信号を記録する点で共通する。
[Prior art] General home video tape recorders do not accept audio signals as P.
There is a magnetic recording/reproducing device using a so-called high-fidelity audio recording method, which performs M modulation and frequency multiplexing recording on the same track as a video signal. There are two methods for recording audio in this type of magnetic recording/reproducing device: a method in which a magnetic head dedicated to audio signals is provided in addition to a magnetic head dedicated to video signals, and a method in which both video and audio are recorded using the same magnetic head. However, both methods have in common that an FM modulated audio signal is recorded in the middle of the frequency bands of the luminance signal and color signal that constitute the video signal.

第3図に示す従来の磁気記録再生装置lは、映像信号専
用の一対磁気ヘッド2a、2bに対し、所定角変異なら
しめた位置に、音声信号専用の一対磁気ヘッド3a、3
bを設けたものであり、磁気ヘッド3a、3bにより音
声信号を深層記録したトラックに、続く磁気ヘッド2a
、2bが映像信号を記録することにより、音声信号と映
像信号を重ね省き記録する方式をとるものである。
In the conventional magnetic recording/reproducing apparatus l shown in FIG. 3, a pair of magnetic heads 3a, 3 dedicated to audio signals are placed at a predetermined angular deviation position with respect to a pair of magnetic heads 2a, 2b dedicated to video signals.
b, and the magnetic head 2a following the track on which the audio signal was deeply recorded by the magnetic heads 3a and 3b.
, 2b records the video signal, so that the audio signal and the video signal are recorded without being overlapped.

[発明が解決しようとする問題点] 上記従来の磁気記録再生装置lは、映像信号と音声信号
が同一のトラック上に周波数多重記録されるため、音声
信号を映像信号とは別の専用トラックに記録していた従
前の磁気記録再生装置のように、映像信号又は音声信号
のいずれか一方だけを後から好みの信号で置換する、い
わゆる後追い録画や後追い録音ができない等の問題点が
あった。
[Problems to be Solved by the Invention] In the conventional magnetic recording and reproducing device l described above, the video signal and the audio signal are frequency-multiplexed recorded on the same track, so the audio signal is recorded on a dedicated track separate from the video signal. Unlike previous magnetic recording and reproducing devices that recorded data, there were problems such as the inability to perform follow-up recording or follow-up recording, in which only one of the video signal or the audio signal could be replaced later with a desired signal.

[問題点を解決するための手段] この発明は、上記問題点を解決したものであり、映像信
号と音声信号を磁気テープに斜交するトラック上に周波
数多重記録する磁気記録再生装置であって、後追い記録
しようとするトラックから再生された信号について、映
像信号か音声信号のいずれか一方を、後追い記録せんと
する信号でもって置換する信号置換手段と、この信号置
換手段の出力を1フレーム期間遅延するフレーム遅延回
路と、前記後追い記録しようとして再生したトラックか
ら記録信号を消去する消去用磁気ヘッドと、この消去用
磁気ヘッドにより消去されたトラックに前記フレーム遅
延回路の出力を記録する後追い記録用磁気ヘッドとを設
けて構成したことを特徴とするものである。
[Means for Solving the Problems] The present invention solves the above-mentioned problems, and is a magnetic recording and reproducing device that frequency-multiplexes video signals and audio signals on oblique tracks on a magnetic tape. , a signal replacement means for replacing either the video signal or the audio signal with the signal to be followed for recording with respect to the signal reproduced from the track to be followed for recording, and the output of the signal replacement means for one frame period. a frame delay circuit for delaying, an erasing magnetic head for erasing a recorded signal from a track reproduced in an attempt to perform follow-up recording, and a follow-up recording head for recording the output of the frame delay circuit on the track erased by the erasing magnetic head. The present invention is characterized in that it is configured by providing a magnetic head.

[作用] この発明は、磁気テープの同一トラック上に周波数多重
記録された映像信号と音声信号を、一旦再生したあと個
別に1フレーム期間遅延し、一方の信号を後追い記録せ
んとする信号でもって置換し、既に消去済みのトラック
に他方の信号とともに記録することにより、後追い録画
又は後追い録音する。
[Function] This invention reproduces the video signal and the audio signal frequency-multiplexed on the same track of a magnetic tape, and then individually delays them by one frame period so that one of the signals can be recorded later. Follow-up recording or follow-up recording is performed by replacing the signal and recording it on the already erased track along with the other signal.

[実施例] 以下、この発明の実施例について、第1.2図を参照し
て説明する。第1図は、この発明の磁気記録再生装置の
一実施例を示す回路構成図、第2図は、第1図に示した
磁気ヘッドの位置関係を示す展開図である。
[Example] Hereinafter, an example of the present invention will be described with reference to FIG. 1.2. FIG. 1 is a circuit diagram showing an embodiment of the magnetic recording/reproducing apparatus of the present invention, and FIG. 2 is a developed diagram showing the positional relationship of the magnetic heads shown in FIG.

第1.2図中、磁気記録再生袋W11は、一対の映像信
号専用の磁気ヘッド2a、2bと一対の音声信号専用の
磁気ヘッド3a、3bのそれぞれに、ヘッドドラム4上
で1トラック分の高さの差をもたせ、アジマスを対応さ
せた後追い記録用の磁気ヘッド+2a、12bと13a
、13bを組みにして設け、さらに磁気ヘッド12aと
13bの間にヘッドドラム上で1トラック分の高さの差
をもたせて消去用磁気ヘッド14を設けたものである。
In FIG. 1.2, the magnetic recording and reproducing bag W11 has a pair of magnetic heads 2a, 2b dedicated to video signals and a pair of magnetic heads 3a, 3b dedicated to audio signals, respectively, for one track on the head drum 4. Magnetic heads +2a, 12b and 13a for follow-up recording with different heights and corresponding azimuths
, 13b are provided as a set, and an erasing magnetic head 14 is provided between the magnetic heads 12a and 13b with a height difference of one track on the head drum.

これらの後追い記録用磁気ヘッド12a。These follow-up recording magnetic heads 12a.

12bには、それぞれ再生アンプ回路15を介してフレ
ーム遅延回路16が接続しである。フレーム遅延回路1
6は、人力を1フレーム周期遅延す。
12b are connected to frame delay circuits 16 via reproduction amplifier circuits 15, respectively. Frame delay circuit 1
6 delays human power by one frame period.

るものであり、それぞれ切り替えスイッチ17を介して
後追い記録用磁気ヘッド12a、12b。
The magnetic heads 12a and 12b for follow-up recording are connected to each other via a changeover switch 17, respectively.

13a、+3bのための記録アンプ回路I8に接続しで
ある。切り替えスイッチ16は、後追い記録時に切り替
えられ、後追い録画回路19又は後追い録音回路20に
接続される。
It is connected to the recording amplifier circuit I8 for 13a and +3b. The changeover switch 16 is switched during follow-up recording and is connected to the follow-up recording circuit 19 or the follow-up recording circuit 20.

ここで、例えば後追い録音する場合、磁気ヘッド3a、
3bに対応する切り替えスイッチ+6が後追い録音回路
20側に切り替わる。そして、この状態で磁気ヘッド2
a、2b及び3a、3bによる再生と消去用磁気ヘッド
14による消去が逐次行われる。まず、°磁気ヘッド2
a、2bにより再生された映像信号は、再生アンプ回路
15、フレーム遅延回路16、切り替えスイッチ17を
介して記録アンプ回路18に供給される。これに対し、
磁気ヘッド3a、3bにより再生された音声信号は、切
り替えスイッチ17が後追い録音回路20側に切り替わ
っているために、記録アンプ回路!8には供給されず、
代わって後追い録音回路20から供給される音声信号が
切り替えスイッチ17を介して記録アンプ回路I8に供
給される。
Here, for example, when performing follow-up recording, the magnetic head 3a,
The changeover switch +6 corresponding to 3b is switched to the follow-up recording circuit 20 side. In this state, the magnetic head 2
Reproduction by a, 2b, 3a, and 3b and erasing by the erasing magnetic head 14 are performed sequentially. First, °magnetic head 2
The video signals reproduced by a and 2b are supplied to a recording amplifier circuit 18 via a reproduction amplifier circuit 15, a frame delay circuit 16, and a changeover switch 17. On the other hand,
The audio signals reproduced by the magnetic heads 3a and 3b are transferred to the recording amplifier circuit! 8 is not supplied,
Instead, the audio signal supplied from the follow-up recording circuit 20 is supplied to the recording amplifier circuit I8 via the changeover switch 17.

このため、磁気ヘッド3a、2a(又は磁気ヘッド2b
、3b)により音声信号と映像信号の順で再生されたト
ラックは、消去用磁気ヘッド!4により消去され、1フ
レーム周期経過した後に磁気ヘッド13a、12a(又
は磁気ヘッド+2b。
Therefore, the magnetic heads 3a, 2a (or magnetic head 2b)
, 3b), the track reproduced in the order of the audio signal and the video signal is erased by the erasing magnetic head! 4, and after one frame period has elapsed, the magnetic heads 13a, 12a (or magnetic head +2b) are erased.

13b)を介して、それぞれ後追い記録回路20から供
給された音声信号と1フレーム周期前に再生した映像信
号が記録される。従って、映像信号に関しては、磁気ヘ
ッド2a、2bが一旦再生したものとまったく同じ信号
が、磁気ヘッド12a。
13b), the audio signal supplied from the follow-up recording circuit 20 and the video signal reproduced one frame period ago are recorded. Therefore, regarding the video signal, the magnetic head 12a receives exactly the same signal as once reproduced by the magnetic heads 2a and 2b.

12bにより再び元のトラックに記録されるわけである
が、音声信号は、後追い録音回路20から供給されたも
のが、以前に記録されていたものに代わって記録され、
こうして後追い録音が進行する。
12b, the audio signal is recorded on the original track again, but the audio signal supplied from the follow-up recording circuit 20 is recorded in place of the previously recorded audio signal.
In this way, follow-up recording progresses.

また、後追い録画する場合、磁気ヘッド2a。In addition, when performing follow-up recording, the magnetic head 2a.

2bに対応する切り替えスイッチ16が後追い録画回路
+9側に切り替わる。そして、この状態で磁気ヘッド2
a、2b及び3a、3bによる再生と消去用磁気ヘッド
14による消去が所定の順序を追って行われる。すなわ
ち、上述の後追い録音時間様、磁気ヘッド3a、2a(
又は磁気ヘッド2b、3b)により音声信号と映像信号
の順で再生されたトラックは、消去用磁気ヘプト14に
より消去され、■フレーム周期経過後に磁気ヘッド13
a、12a(又は磁気ヘッド12b、13b)を介して
、今度は1フレーム周期前に再生した音声信号と後追い
録画回路19から供給された映像信号が記録される。従
って、音声信号に関しては、磁気ヘッド3a、3bが一
旦再生したものとまったく同じ信号が、磁気ヘッド13
a、13bにより再び元のトラックに記録されるわけで
あるが、映像信号は、後追い録画回路I9から供給され
たものが、以前に記録されていたものに代わって記録さ
れ、こうして後追い録画が進行する。
The changeover switch 16 corresponding to 2b is switched to the trailing recording circuit +9 side. In this state, the magnetic head 2
Reproduction by a, 2b, 3a, and 3b and erasing by the erasing magnetic head 14 are performed in a predetermined order. That is, for the follow-up recording time described above, the magnetic heads 3a, 2a (
Or, the track reproduced in the order of the audio signal and the video signal by the magnetic heads 2b, 3b) is erased by the erasing magnetic head 14, and after the frame period has elapsed, the magnetic head 13
This time, the audio signal reproduced one frame period before and the video signal supplied from the follow-up recording circuit 19 are recorded via the magnetic heads 12a and 12a (or the magnetic heads 12b and 13b). Therefore, regarding the audio signal, exactly the same signal once reproduced by the magnetic heads 3a and 3b is reproduced by the magnetic head 13.
The video signal is recorded on the original track again by steps a and 13b, but the video signal supplied from the follow-up recording circuit I9 is recorded in place of the previously recorded one, and in this way the follow-up recording progresses. do.

このように、上記磁気記録再生装置11は、磁気テープ
の同一トラック上に周波数多重記録された映像信号と音
声信号を、磁気ヘッド2a、3a及び2b、3bにより
一旦再生したあと、フレーム遅延回路16において個別
にlフレーム期間遅延し、切り替えスイッチ17の切り
替えることによって、後追い録画回路19又は後追い録
音回路20からの後追い記録せんとする信号でもって一
方の信号を置換し、既に消去済みのトラックに他方の信
号とともに記録する構成としたから、従来実現が難しい
とされていた映像・音声同一トラック記録方式にありな
がら、後追い記録用の磁気ヘッド12a〜13bと必要
なトラックのみ消去できる消去用磁気ヘッド14及び記
録タイミングを合わせるためのフレーム遅延回路16等
を新たに付加することによって、確実な後追い録画酸は
後追い録音が可能である。
In this manner, the magnetic recording/reproducing device 11 once reproduces video signals and audio signals frequency-multiplexed on the same track of a magnetic tape using the magnetic heads 2a, 3a, 2b, 3b, and then transmits them to the frame delay circuit 16. By individually delaying one frame period and switching the changeover switch 17, one signal is replaced with a signal to perform follow-up recording from the follow-up recording circuit 19 or the follow-up recording circuit 20, and the other signal is added to the already erased track. Since the configuration is such that recording is performed along with the signal, the magnetic heads 12a to 13b for follow-up recording and the erasing magnetic head 14 that can erase only the necessary tracks are used, despite the video/audio same track recording method, which has been considered difficult to realize in the past. By newly adding a frame delay circuit 16 and the like for adjusting the recording timing, reliable follow-up recording is possible.

なお、上記実施例では、磁気記録再生装置11として、
映像用と音声用の磁気ヘッドを別個に設ける方式のもの
を例にとったが、単一の映像・音声ヘッドを用いる方式
のものにも、同様に適用できるのは勿論である。
In the above embodiment, the magnetic recording/reproducing device 11 includes:
Although we have taken as an example a system in which magnetic heads for video and audio are provided separately, it goes without saying that the present invention can be similarly applied to systems that use a single video/audio head.

[発明の効果コ 以上説明したように、この発明は、磁気テープの同一ト
ラック上に周波数多重記録された映像信号と音声信号と
を、一旦再生したあと個別に1フレーム期間遅延し、一
方の信号を後追い記録せんとする信号でもって置換し、
既に消去済みのトラックに他方の信号とともに記録する
構成としたから、従来実現が雉しいとされていた映像・
音声同一トラック記録方式にありながら、後追い記録用
の磁気ヘッドと必要なトラックのみ消去できる消去用磁
気ヘッドと記録タイミングを合わせるためのフレーム遅
延回路等を新たに付加することによって、確実な後追い
録画酸は後追い録音が可能であり、映像用と音声用の磁
気ヘッドを別個に設ける方式にも、或は単一の映像・音
声ヘッドを用いる方式にも、適用できるので、幅広い用
途をもつ等の優れた効果を奏する。
[Effects of the Invention] As explained above, in the present invention, video signals and audio signals frequency-multiplexed on the same track of a magnetic tape are once reproduced and then individually delayed for one frame period, so that one of the signals is is replaced by a signal to be recorded later,
Because it is configured to record on a track that has already been erased along with the other signal, it is possible to record video and other signals on a track that has already been erased.
Although it uses the same audio track recording method, it has a magnetic head for trailing recording, a magnetic head for erasing that can erase only the necessary tracks, and a frame delay circuit to match the recording timing, etc., to ensure reliable trailing recording. It is possible to perform follow-up recording, and it can be applied to systems with separate magnetic heads for video and audio, or systems that use a single video/audio head, so it has the advantage of having a wide range of uses. It has a great effect.

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

第1図は、この発明の磁気記録再生装置の一実施例を示
す回路構成図、第2図は、第1図に示した磁気ヘッドの
位置関係を示す展開図、第3図は、従来の磁気記録再生
装置の一例を示す回路構成図である。 If、、、磁気記録再生装置、12a、12b。 +3a、+3b、、、後追い記録用磁気ヘッド。 148. 消去用磁気ヘッド、+6.、、フレーム遅延
回路、+7.、、切り替えスイッチ。
FIG. 1 is a circuit configuration diagram showing an embodiment of the magnetic recording/reproducing apparatus of the present invention, FIG. 2 is a developed view showing the positional relationship of the magnetic head shown in FIG. 1, and FIG. FIG. 1 is a circuit configuration diagram showing an example of a magnetic recording/reproducing device. If, , magnetic recording and reproducing device, 12a, 12b. +3a, +3b... Magnetic head for follow-up recording. 148. Erasing magnetic head, +6. , , frame delay circuit, +7. ,,Selector switch.

Claims (1)

【特許請求の範囲】[Claims] 映像信号と音声信号を磁気テープに斜交するトラック上
に周波数多重記録する磁気記録再生装置であって、後追
い記録しようとするトラックから再生された信号につい
て、映像信号か音声信号のいずれか一方を、後追い記録
せんとする信号でもって置換する信号置換手段と、この
信号置換手段の出力を1フレーム期間遅延するフレーム
遅延回路と、前記後追い記録しようとして再生したトラ
ックから記録信号を消去する消去用磁気ヘッドと、この
消去用磁気ヘッドにより消去されたトラックに前記フレ
ーム遅延回路の出力を記録する後追い記録用磁気ヘッド
とを設けてなる磁気記録再生装置。
A magnetic recording and reproducing device that frequency multiplexes video and audio signals on diagonal tracks on a magnetic tape, and records either the video signal or the audio signal with respect to the signal reproduced from the track to be recorded later. , a signal replacement means for replacing the signal with the signal to be recorded later, a frame delay circuit for delaying the output of the signal replacement means by one frame period, and an erasing magnet for erasing the recorded signal from the track reproduced for the purpose of the later recording. A magnetic recording/reproducing device comprising: a head; and a follow-up recording magnetic head for recording the output of the frame delay circuit on a track erased by the erasing magnetic head.
JP15303286A 1986-06-30 1986-06-30 Magnetic recording and reproducing device Pending JPS639004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15303286A JPS639004A (en) 1986-06-30 1986-06-30 Magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15303286A JPS639004A (en) 1986-06-30 1986-06-30 Magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPS639004A true JPS639004A (en) 1988-01-14

Family

ID=15553476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15303286A Pending JPS639004A (en) 1986-06-30 1986-06-30 Magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS639004A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233704A (en) * 1988-07-22 1990-02-02 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
JPH0233704A (en) * 1988-07-22 1990-02-02 Sharp Corp Magnetic recording and reproducing device

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