JPS61265705A - Magnetic recording and reproducing device - Google Patents
Magnetic recording and reproducing deviceInfo
- Publication number
- JPS61265705A JPS61265705A JP10744585A JP10744585A JPS61265705A JP S61265705 A JPS61265705 A JP S61265705A JP 10744585 A JP10744585 A JP 10744585A JP 10744585 A JP10744585 A JP 10744585A JP S61265705 A JPS61265705 A JP S61265705A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- signal
- video signal
- audio
- carrier component
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ＦＭオーディオ信号の記録・再生機能を有す
る・・イファイ型ビデオテープレコーダのごとき磁気記
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 magnetic recording and reproducing apparatus, such as an IFEI type video tape recorder, having a recording and reproducing function of FM audio signals.
従来の技術
一般にＦＭオーディオ信号の記録・再生機能を有する磁
気記録再生装置（以下、Ｈｉ −Ｆｉ ＶＴＲと称す）
は、第３図に示すように、ビデオ信号とオーディオ信号
を磁気テープ上に重畳して記録する方式を採用している
。すなわち、音声ヘッドで記録した音声信号記録部Ａの
上に、映像ヘッドで完全に重ねてビデオ信号記録部Ｂが
形成されるように両ヘッドを回転シリンダーに取シ付け
、オーディオ信号をテープ深層部に記録した後、ビデオ
信号を記録するように構成されている。2. Description of the Related Art Magnetic recording and reproducing devices (hereinafter referred to as Hi-Fi VTRs) generally have the function of recording and reproducing FM audio signals.
As shown in FIG. 3, this system employs a method of recording video signals and audio signals in a superimposed manner on a magnetic tape. That is, both heads are attached to a rotating cylinder so that a video signal recording section B is completely overlapped by the video head on top of the audio signal recording section A recorded by the audio head, and the audio signal is transferred to the deep part of the tape. and is configured to record the video signal.
発明が解決しようとする問題点
ところが、そのような構成にてオーディオ信号キャリア
とビデオ信号キャリアを記録した場合、第４図に示すよ
うにビデオ信号の記録電流（キャリアをビデオ信号でＦ
Ｍ変調した信号）の増加に伴い、オーディオ信号の再生
出力が低下するという問題があった。本発明はＨｉ−Ｆ
ｉ ＶＴＲにおけ５るビデオ信号入力がなくオーディオ
信号のみを記録するモード、すなわちＦＭオーディオ専
用記録という特殊なモードにおいて、ビデオ信号の記録
に関与するキャリア成分の記録電流を減少させ、オーデ
ィオ信号の再生出力の向上、さらには性能のより向上を
図ろうとするものである。Problems to be Solved by the Invention However, when an audio signal carrier and a video signal carrier are recorded with such a configuration, as shown in FIG.
There is a problem in that the reproduction output of the audio signal decreases as the number of M-modulated signals increases. The present invention is based on Hi-F
In a special mode called FM audio-only recording, which is a mode in which there is no video signal input and only audio signals are recorded in a VTR, the recording current of the carrier component involved in recording the video signal is reduced, and the audio signal is reproduced. The aim is to improve output and further improve performance.
問題点を解決するための手段
前記問題点を解決するために本発明は、ＦＭオーディオ
専用記録モードを判別し、それによってビデオ信号の記
録増幅部の入力レベルや記録増幅器の利得を下げるなど
して、ビデオ信号の記録に関与するキャリア成分の記録
電流を減少させるように構成したものである。Means for Solving the Problems In order to solve the above problems, the present invention determines the FM audio exclusive recording mode, and accordingly lowers the input level of the video signal recording amplifier and the gain of the recording amplifier. , which is configured to reduce the recording current of the carrier component involved in recording the video signal.
作 用
本発明は上記のように構成することによシ、ビデオ信号
のキャリア成分の記録電流値を任意の値まで減しさせ、
ＦＭオーディオ信号記録専用時の性能をよシ向上させる
ことができる。Effect: By configuring as described above, the present invention reduces the recording current value of the carrier component of a video signal to an arbitrary value,
The performance when exclusively recording FM audio signals can be greatly improved.
実施例
以下、本発明の実施例を図面を参照して説明する。第１
図は記録増幅部の利得を変えて記録電流を変化させる実
施例のブロック図である。同図において、１はビデオ信
号入力がある場合には、ビデオ信号にてＦＭ変調された
キャリア成分が記録電流として入力され、ビデオ信号入
力がない場合には、そのキャリア成分のみが入力される
入力端子である。２は入力レベルを設定する入力レベル
設定回路、３は色信号記録帯域をつくるためのバイパス
フィルタ（Ｈ，Ｐ、Ｆ） 、４は記録増幅部、６はその
利得切換回路、６はＦＭオーディオ専用記碌判別信号Ｇ
の入力端子である。本実施例では、ＦＭオーディオ専用
記録判別信号ＧがＦＭオーディオ専用記録モード側にな
った時、その信号Ｇにて記録増幅部４の利得が下がるよ
うに利得切換回路６を含む制御回路を構成することによ
って、ビデオ信号のキャリア成分である記録電流を減少
させるようにしたものである。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram of an embodiment in which the recording current is changed by changing the gain of the recording amplification section. In the same figure, 1 is an input to which a carrier component FM modulated by the video signal is input as a recording current when a video signal is input, and only the carrier component is input when there is no video signal input. It is a terminal. 2 is an input level setting circuit that sets the input level, 3 is a bypass filter (H, P, F) for creating a color signal recording band, 4 is a recording amplification section, 6 is a gain switching circuit, and 6 is dedicated for FM audio. Recording status signal G
This is the input terminal of In this embodiment, the control circuit including the gain switching circuit 6 is configured so that when the FM audio-only recording discrimination signal G changes to the FM audio-only recording mode side, the gain of the recording amplification section 4 is reduced by the signal G. This reduces the recording current, which is the carrier component of the video signal.
第２図は記録増幅部の入力レベルを変化させる本発明の
別の実施例のブロック図である。周辺回路は第１図の実
施例と同様である。入力レベル設定回路２が図示のよう
なボリウムである場合、ＦＭオーディオ専用記録判別信
号Ｇにより、信号減衰回路を構成するトランジスタ７を
オンさせることにより、ポリウム８の分割比が抵抗９に
よって変わり、記録増幅部４０入力レベルが下がること
になる。従って、第１図の実施例と同様にビデオ信号の
キャリア成分の記録電流が減少し、再生時の音声性能が
より向上する。なお、第１図および第２図において、１
ｏはビデオヘッド、１１は磁気テープを示す。FIG. 2 is a block diagram of another embodiment of the present invention for changing the input level of the recording amplification section. The peripheral circuits are similar to the embodiment shown in FIG. When the input level setting circuit 2 is a volume as shown in the figure, by turning on the transistor 7 constituting the signal attenuation circuit by the FM audio recording discrimination signal G, the division ratio of the polyurethane 8 is changed by the resistor 9, and recording is performed. The input level of the amplifier section 40 will be lowered. Therefore, similar to the embodiment shown in FIG. 1, the recording current of the carrier component of the video signal is reduced, and the audio performance during reproduction is further improved. In addition, in Figures 1 and 2, 1
o indicates a video head, and 11 indicates a magnetic tape.
発明の効果
以上述べたように、本発明によれば、きわめて簡単な回
路構成でＦＭオーディオ専用記録時のビデオ信号の記録
に関与するキャリア成分の記録電流を任意の値に減少さ
せることができ、これにより、専用記碌部の再生性能の
向上を図ることが可能となるため、Ｈｉ−Ｆｉ ＶＴＨ
にとってきわめて有用なものとなるものである。Effects of the Invention As described above, according to the present invention, the recording current of the carrier component involved in recording the video signal during FM audio-only recording can be reduced to an arbitrary value with an extremely simple circuit configuration. This makes it possible to improve the playback performance of the dedicated recording section, so Hi-Fi VTH
It will be extremely useful for.
第１図は本発明の一実施例の回路構成を示すブロック図
、第２図は本発明の他の実施例を示すブロック図、第３
図（−）は重畳記録のトラックパターン図、第３図中）
は重畳記録状態を模式的に示す磁気テープの断面図、第
４図はビデオ信号の記録電流とオーディオ信号の再生出
力関係を示した線図である。
１・・・・・・入力端子、２・・・・・・入力レベル設
定回路、３・・・・・・バイパスフィルタ、４・・・・
・・記録増幅部、５・・・・・・利得切換回路、Ｇ・・
・・・・ＦＭオーディオ専用記録判別信号、７・・・・
・・トランジスタ、９・・・・・・抵抗、１ｏ・・・・
・・ビデオヘッド、１１・・・・・・磁気テープ。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第
１ 図
第２図
第３図
第４図FIG. 1 is a block diagram showing the circuit configuration of one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG.
(-) is a track pattern diagram for superimposed recording (in Figure 3)
4 is a cross-sectional view of a magnetic tape schematically showing a superimposed recording state, and FIG. 4 is a diagram showing the relationship between the recording current of a video signal and the reproduction output of an audio signal. 1...Input terminal, 2...Input level setting circuit, 3...Bypass filter, 4...
... Recording amplification section, 5... Gain switching circuit, G...
...FM audio dedicated recording discrimination signal, 7...
...Transistor, 9...Resistor, 1o...
...Video head, 11...Magnetic tape. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 2 Figure 3 Figure 4
Claims (1)
再生装置であって、ビデオ信号入力がなくオーディオ信
号のみを記録するモードにおいて、ビデオ信号の記録に
関与するキャリア成分の記録電流を減少させる制御回路
を備えたことを特徴とする磁気記録再生装置。A magnetic recording and reproducing device having a recording and reproducing function of an FM audio signal, which is equipped with a control circuit that reduces the recording current of a carrier component involved in recording a video signal in a mode in which only an audio signal is recorded without a video signal input. A magnetic recording and reproducing device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10744585A JPS61265705A (en) | 1985-05-20 | 1985-05-20 | Magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10744585A JPS61265705A (en) | 1985-05-20 | 1985-05-20 | Magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61265705A true JPS61265705A (en) | 1986-11-25 |
Family
ID=14459328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10744585A Pending JPS61265705A (en) | 1985-05-20 | 1985-05-20 | Magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61265705A (en) |
-
1985
- 1985-05-20 JP JP10744585A patent/JPS61265705A/en active Pending
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