JPS60128788A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS60128788A JPS60128788A JP58237491A JP23749183A JPS60128788A JP S60128788 A JPS60128788 A JP S60128788A JP 58237491 A JP58237491 A JP 58237491A JP 23749183 A JP23749183 A JP 23749183A JP S60128788 A JPS60128788 A JP S60128788A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- sound
- audio
- circuit
- recording
- 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
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
- H04N9/802—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving processing of the sound signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Description
【発明の詳細な説明】 [技術分野1 この発明はビデオチープレコーグ(以下VTRという。[Detailed description of the invention] [Technical field 1 This invention is a video cheap recorder (hereinafter referred to as a VTR).
)等の磁気記録再生装置に関するものである。) and other magnetic recording and reproducing devices.
[従来技術1
音声信号をFM変調し、FM変調された輝度信号と低域
変換色信号との間の周波数帯に入れ、VTRの回転ヘッ
ドにより記録再生を行なうHi−Fiビデオにおいては
、そのVTRがテレビ放送局の電波受信用のチューナを
備えている場合は、第1図のVH8−Hi−Fi方式の
ものでも第2図のβ−H1−Fi方式のものでも、チュ
ーナから得たFM音声IF信号を音声回路100により
1度復調し、その後音声記録回路101により音声FM
記録信号に再度変換して、これを第1図に示すVH3H
i Fi VTRでは4へラドヘリカルスキャン方式の
記録ヘッド102の音声へ52ド102L、102Rに
印加して記録し、また第2図に示すβ−H1−FiVT
Rでは2ヘツドヘリ力ルスキヤン方式の記録ヘッド10
2゛によって記録していた。[Prior art 1] In Hi-Fi video, the audio signal is FM-modulated and placed in a frequency band between the FM-modulated luminance signal and the low-frequency conversion color signal, and is recorded and reproduced by the rotating head of the VTR. If the device is equipped with a tuner for receiving radio waves from television broadcasting stations, the FM sound obtained from the tuner, whether it is the VH8-Hi-Fi system shown in Figure 1 or the β-H1-Fi system shown in Figure 2, is The IF signal is demodulated once by the audio circuit 100, and then the audio FM signal is demodulated by the audio recording circuit 101.
This is converted back into a recording signal and converted into a VH3H signal as shown in Figure 1.
In the i-Fi VTR, the sound of the recording head 102 of the 4-rad helical scan type is recorded by applying it to the 52-domains 102L and 102R, and the β-H1-FiVT shown in FIG.
In R, a two-head heli force scan type recording head 10 is used.
It was recorded by 2.
再生時には音声回路103によ1)復調して再生を行な
う。このように、従来のチューナHHi −Fi VT
Rでは右左の音声信号用に2個又は4個のFM変調及び
復調回路が必要となり、そのための大幅なコストアップ
になり、Hi Fiビデオは高価なものになり、さらに
回路も複雑かつ大きなものになるという欠点があった。During playback, the audio circuit 103 performs 1) demodulation and playback. In this way, the conventional tuner HHi-Fi VT
R requires two or four FM modulation and demodulation circuits for left and right audio signals, which significantly increases costs, making Hi-Fi video expensive, and making the circuits complex and large. There was a drawback.
[目的1
この発明はいわゆるチューナ付のHi−Fiビデオ等に
おいて音声の処理回路の一部をチューナの一部を利用す
ることにより、安価に構成で卜る磁気記録再生装置を提
供することを目的とする。[Objective 1] The object of the present invention is to provide a magnetic recording and reproducing device that can be constructed at a low cost by using a part of the tuner as a part of the audio processing circuit in a so-called Hi-Fi video etc. equipped with a tuner. shall be.
[構成1 以下にこの発明の一実施例を図面とともに説明する。[Configuration 1 An embodiment of the present invention will be described below with reference to the drawings.
第3図において、1は標準テレビ放送受信用のインター
キャリヤ方式のチューナ、2はチューナ1に接続された
映像IF(中間周波)増幅回路であり、この映像IF増
幅回路2の出力信号には映像IF信号とともに4.5M
Hzの音声IF信号も含まれる。この出力信号中の映像
IP倍信号映像回路3に印加され、4ヘツドのヘリカル
スキャン方式の記録ヘッド4に印加され、ビデオテープ
上に記録される。一方、音声IF信号は図示しないフィ
ルタ手段によって映像IF信号から分離され、外部信号
と内部信号の切換スイッチ5を介して周波数変換回路6
に印加され、局部発振回路7からの周波数により混合し
て、1〜2MHzの音声FM変調記録信号Sを得る。こ
の音声FM変調記録信号は第4図に示すように、低域変
換色信号Aの周波数とFM輝度信号Bとの間の周波数帯
にある。In FIG. 3, 1 is an intercarrier tuner for receiving standard television broadcasting, 2 is a video IF (intermediate frequency) amplification circuit connected to the tuner 1, and the output signal of this video IF amplification circuit 2 is a video 4.5M with IF signal
A Hz audio IF signal is also included. The video IP multiplied signal in this output signal is applied to a video circuit 3, applied to a 4-head helical scan type recording head 4, and recorded on a video tape. On the other hand, the audio IF signal is separated from the video IF signal by a filter means (not shown), and is passed through the frequency conversion circuit 6 via the external signal/internal signal changeover switch 5.
and mixed by the frequency from the local oscillation circuit 7 to obtain an audio FM modulated recording signal S of 1 to 2 MHz. This audio FM modulated recording signal is in a frequency band between the frequency of the low frequency conversion color signal A and the FM luminance signal B, as shown in FIG.
この音声FM変調記録信号は記録再生切換スイッチ8を
介して音声専用記録ヘッド4bに印加され、ビデオテー
プ上に記録される。記録方式は公知のVH8Hi−Fi
VTRにおけると同様である。This audio FM modulated recording signal is applied to the audio-only recording head 4b via the recording/reproduction changeover switch 8, and is recorded on the video tape. The recording method is the well-known VH8Hi-Fi
This is the same as in a VTR.
一方、外部入力の音声信号の記録は、該VTRに内蔵の
音声多重エンコーダ9により、左右両チャンネル信号を
テレビ用音声多重信号に生成して、RFコンバータ10
の音声FM変調回路11により音声IF信号に変換され
る。On the other hand, to record an externally input audio signal, an audio multiplex encoder 9 built into the VTR generates left and right channel signals into a TV audio multiplex signal, and an RF converter 10
The audio FM modulation circuit 11 converts the signal into an audio IF signal.
この音声IF信号は映像中間周波増幅回路2により得ら
れるものと同じ4.5MHzの周波数帯にあり、該音声
IF信号は切換スイッチ5を介して周波数変換回路6に
印加され、チューナから得た音声FM変調記録信号と同
様に記録ヘッド4bにより記録される。This audio IF signal is in the same 4.5 MHz frequency band as that obtained by the video intermediate frequency amplification circuit 2, and the audio IF signal is applied to the frequency conversion circuit 6 via the changeover switch 5, and the audio obtained from the tuner is It is recorded by the recording head 4b in the same way as the FM modulated recording signal.
12は音声専用記録へラド4bからの切換スイ・ンチ8
を介して得られる再生音声信号を処理する周波数変換回
路であり、この回1@12は局部発振回路7からの周波
数と音声専用記録へ・ラド4bから再生された音声信号
とにより、4.5MHz帯の音声IP傷信号生成する。12 is switch 8 for switching from RAD 4b to audio-only recording.
This is a frequency conversion circuit that processes the reproduced audio signal obtained via the local oscillation circuit 7, and this time 1@12 is a frequency conversion circuit that processes the reproduced audio signal obtained through the local oscillation circuit 7 and the audio signal reproduced from the audio-only recording/RAD 4b. Generate a voice IP signal for the band.
この周波数変換回路42で得られた4、5MHzの音声
IF信号はFM復個回路13a、サンプルホールY回路
13b、音声多重復調回路1’3cにてなる音声回路1
3にて音声FM復調処理され、R音声面:t&14R,
L音%diil1814LlJ’)可聴m波の各チャン
ネルの音声信号に変換される。The 4.5 MHz audio IF signal obtained by this frequency conversion circuit 42 is transmitted to the audio circuit 1 consisting of an FM decoupling circuit 13a, a sample hole Y circuit 13b, and an audio multiplexing/demodulation circuit 1'3c.
3, audio FM demodulation processing is performed, R audio side: t & 14R,
L sound %dil1814LlJ') is converted into an audio signal of each channel of the audible m-wave.
第3図において、15は映像再生回路を示す。In FIG. 3, 15 indicates a video reproduction circuit.
なお第3図において、再生時に記録ヘッドの切換時の信
号のドロップアウト時にはサンプルホール)′回路13
bが信号を一時記憶してドロップアウトを防ぐ。In addition, in Fig. 3, when the signal drops out when switching the recording head during playback, the sample hole)' circuit 13
b temporarily stores the signal to prevent dropouts.
第3図にVH3Hi−Fi力式の場合を示したが、β−
Hi Fi方式の場合には、映像回路3と周波数変換回
路6との後段に映像音声合成回路を設けて、かつ発振器
7を2個使用し、第5図に示すように音声FM変調記録
信号用の2つの搬送波を使って2つの信号S、、S2を
作り、これをフィールド毎に切り換えて、クロスF−り
を防ぐようにして、2つのビデオヘッドのみで映像と音
声とを記録することかで卜る。Figure 3 shows the case of VH3Hi-Fi force type, and β-
In the case of the Hi-Fi system, a video/audio synthesis circuit is provided after the video circuit 3 and the frequency conversion circuit 6, and two oscillators 7 are used, as shown in FIG. Two carrier waves can be used to create two signals S, , S2, and these can be switched for each field to prevent cross-feedback, and video and audio can be recorded using only two video heads. Divorce.
第6図にいわゆる8mmビデオと呼ばれる小型VTRに
この発明を利用した回路を示す。なお、第3図の回路と
同じ部分には同じ符号を付した。この小型VTRはチュ
ーす1を備え、映像増幅回路2で得た4、5MHz帯の
音声IF信号は周波数変換回路6により1.5MHz帯
の音声FM変調記録信号に変換される。この音声FM変
調記録信号は第7図に示すように低域変換色信号AとF
M輝輝度信号帯帯の間に挿入される。音声FM変調信号
は2へラドヘリカルスキャン方式の記録へ・ラド4に印
加される。FIG. 6 shows a circuit in which the present invention is applied to a small VTR called 8mm video. Note that the same parts as in the circuit of FIG. 3 are given the same reference numerals. This small VTR is equipped with a tuner 1, and a 4.5 MHz band audio IF signal obtained by a video amplifier circuit 2 is converted into a 1.5 MHz band audio FM modulated recording signal by a frequency conversion circuit 6. This audio FM modulation recording signal is a low frequency conversion color signal A and F as shown in FIG.
It is inserted between the M luminance signal bands. The audio FM modulation signal is applied to the rad 4 for recording using the radial helical scan method.
再生時には、記録ヘッドから再生された1、5MHz帯
の音声FM変調信号は切換スイッチ8を介して周波数変
換回路12に印加される。以後の動作は第3図の実施例
と同様である。During reproduction, the 1.5 MHz band audio FM modulated signal reproduced from the recording head is applied to the frequency conversion circuit 12 via the changeover switch 8. The subsequent operations are similar to the embodiment shown in FIG.
なお第6図において、16は記録ヘッドの回転制御用の
パイロット信号Pを発生すゐパイロット信号発生回路、
17は映像信号記録回路を示す。In FIG. 6, reference numeral 16 denotes a pilot signal generation circuit that generates a pilot signal P for controlling the rotation of the recording head;
17 indicates a video signal recording circuit.
なお第6図において、外部からの音声入力に対しては第
3図の回路における音声多重エンコーダ9、RFコンバ
ータ1Oの音声FM変調回路11を設けて、この出力を
周波数変換回路6に印加すればよい。In FIG. 6, for audio input from the outside, the audio multiplex encoder 9 in the circuit shown in FIG. good.
なお8mmVTRの場合、記録ヘッドのアジマス角が深
い(±1O°)のため、音声FM変調信号の2つのヘッ
ド間のクロストークが問題にならず、音声FM変調信号
用の搬送波は1つだけでよい。In the case of an 8mm VTR, the azimuth angle of the recording head is deep (±10°), so crosstalk between the two heads of the audio FM modulation signal is not a problem, and there is only one carrier wave for the audio FM modulation signal. good.
[効果]
以上詳述したように、この発明はチューナ付のVTR等
の磁気記録再生装置において、チューナの出力側から得
られる音声IF信号を直ちに記録用の周波数帯の音声F
M変調記録信号に変換するようにしたものであるから、
従来のよ)にチューナから得た音声IF信号を一度復調
するための処理回路(第1図と第2図の音声IP後段の
音声回路10O)が不要となり、回路構成を簡単にし装
置をコンパクトで軽量とし、かつ磁気記録再生装置を安
価にすることができる。[Effects] As described in detail above, the present invention provides an audio IF signal obtained from the output side of the tuner in a magnetic recording/reproducing device such as a VTR equipped with a tuner.
Since it is designed to convert into an M modulation recording signal,
This eliminates the need for a processing circuit (the audio circuit 10O after the audio IP in Figures 1 and 2) for once demodulating the audio IF signal obtained from the tuner (as in the conventional case), simplifying the circuit configuration and making the device more compact. The magnetic recording/reproducing device can be made lightweight and inexpensive.
第1図と第2図はチューナ付VTRの従来例を示すブロ
ック図、第3図はこの発明の一実施例を示すブロック図
、第4図と第5図は第3図の回路の信号の周波数分布図
、第6図は8闘ビデオにこの発明を適用した回路を示す
ブロック図、第7図は第6図の回路の信号の周波数分布
図である。
1・・・チューナ、2・・・音声中間周波増幅回路、4
・・・記録ヘッド、6,12・・・周波数変換回路。
特許出願人 株式会社 リ コー
代理 人 弁理士青山葆外1名
手続補正書(自、)
1事件の表示
昭和58年特許願第 237491 号2、発明の名称
磁気記録再生装置
3、補正をする者
事件との関係 特許出願人
fIi所東京都太口]区中馬込1丁目3番6号4代理人
5、補正命令の日付: 自 発
(1)明細書第3頁11行目[インターキャリア方式の
」とあるを削除する。
(2)同第3頁17行目[記録ヘッド4]とあるを「映
像専用記録へラド4aJに訂正する。
(3)同第7頁2行目「回転」とあるを「トラッキング
」に訂正する。
(4)同第8頁2行目「不要とな1)、」の後1こ「さ
らにFMされる音声信号に音声多重信号を用いているた
め音声FM変調信号用の搬送波が従来のHi−FiVT
Rの半分で済み、」を挿入する。
(5)第3図を別紙のとおり補正する。1 and 2 are block diagrams showing a conventional example of a VTR with a tuner, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIGS. 4 and 5 show signal diagrams of the circuit in FIG. 3. FIG. 6 is a block diagram showing a circuit to which the present invention is applied to the 8-game video, and FIG. 7 is a frequency distribution diagram of signals of the circuit shown in FIG. 6. 1... Tuner, 2... Audio intermediate frequency amplification circuit, 4
. . . Recording head, 6, 12 . . . Frequency conversion circuit. Patent Applicant Ricoh Co., Ltd. Agent Patent Attorney Aoyama Sogai 1 Procedural Amendment (Private) 1 Case Description 1982 Patent Application No. 237491 2 Name of the invention Magnetic recording and reproducing device 3 Person making the amendment Relationship to the case Patent applicant fIi, 1-3-6, Nakamagome, 1-3-6, Tokyo, Agent 5, Date of amendment order: Voluntary (1) Specification, page 3, line 11 [Intercarrier system] Delete the text "of". (2) On page 3, line 17, [Recording head 4] is corrected to ``Record head 4aJ for video only recording.'' (3) On page 7, line 2, ``rotation'' is corrected to ``tracking.'' do. (4) Page 8, line 2, "Unnecessary 1)," followed by a line "Furthermore, since an audio multiplex signal is used for the audio signal to be FM, the carrier wave for the audio FM modulated signal is FiVT
It only takes half of R.'' is inserted. (5) Amend Figure 3 as shown in the attached sheet.
Claims (1)
生装置において、チューナから得た音声中間周波信号を
FM輝度信号の周波数と低域変換色信号の周波数との罰
の周波数帯にある音声FM記録信号に変換する周波数変
換手段と記録ヘッドとを備え、上記周波数に変換された
音声FM記録信号を記録ヘッドにより記録することを特
徴とする磁気記録再生装置。(1) In a magnetic recording and reproducing device for video information recording equipped with a tuner, an audio intermediate frequency signal obtained from the tuner is converted into an audio FM signal in a frequency band between the frequency of the FM luminance signal and the frequency of the low frequency conversion color signal. 1. A magnetic recording and reproducing apparatus comprising a frequency conversion means for converting into a recording signal and a recording head, and the recording head records the audio FM recording signal converted to the frequency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58237491A JPS60128788A (en) | 1983-12-15 | 1983-12-15 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58237491A JPS60128788A (en) | 1983-12-15 | 1983-12-15 | Magnetic recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60128788A true JPS60128788A (en) | 1985-07-09 |
Family
ID=17016107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58237491A Pending JPS60128788A (en) | 1983-12-15 | 1983-12-15 | Magnetic recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60128788A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0314772U (en) * | 1989-06-28 | 1991-02-14 |
-
1983
- 1983-12-15 JP JP58237491A patent/JPS60128788A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0314772U (en) * | 1989-06-28 | 1991-02-14 |
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