JPH0469862A - Magnetic recording or recording and reproducing device - Google Patents
Magnetic recording or recording and reproducing deviceInfo
- Publication number
- JPH0469862A JPH0469862A JP2183198A JP18319890A JPH0469862A JP H0469862 A JPH0469862 A JP H0469862A JP 2183198 A JP2183198 A JP 2183198A JP 18319890 A JP18319890 A JP 18319890A JP H0469862 A JPH0469862 A JP H0469862A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- recording
- modulator
- reproducing
- voltage
- 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
Links
Abstract
Description
［産業上の利用分野］
この発明は、家庭用のＶＴＲ等の磁気記録装置又は磁気
記録再生装置に関するものであり、使用するビデオテー
プ等の性能を充分に引き出すことができるようにしたも
のである。
［従来の技術］
一般に、家庭用ＶＴＲのビデオテープとしてノーマルテ
ープの他に該ノーマルテープよりも高性能の、いわゆる
ハイグレードテープが用いられている。このハイグレー
ドテープの性能を充分に引き出すのには、記録系又は再
生系の特性をノーマルテープの場合とは異ならしめる必
要がある。この特性を異ならしめるものとして、例えば
次のような場合が考えられる。
■ビデオ信号の輝度信号がＦＭ変調されて磁気記録され
る記録系において、ＦＭ変調される以前の輝度信号の高
域の小レベル信号成分を強調するデイテールエンファシ
ス回路のエンファシス量を制御する。
■ビデオ信号の輝度信号がＦＭ変調されて磁気記録され
る記録系において、ＦＭ変調された輝度信号の低域信号
成分を持上げるＦＭイコライザの等化■を制御する。
■再生された輝度信号がＦＭ復調される再生系において
、ＩＩ調される以前のＦＭ輝度１を号の高域を持」−げ
るＦＭビ〜・キング回路のピーキング量を制御する。
■再生された輝度信号がＦＭ復調される再生系において
、復調されｋＩ＆信号のノイズをキャンセルするノイズ
キャンセラのキャンセル量を制御゛４る。
一方、前記した記録系又は再す、系の特性をビデオテー
プの種類に応して自動的に制御するために、該ビデオテ
ープに中波長の基１ｐ信号を記録してこれを再生し、再
生された基ＩＪＮｉ号のレベルを検出してこれを記憶し
、記憶された基準信号のレベルに応じて前記記録系又は
再生系の特性を制御することが考えられる。
［発明が解決しようとする課題］
ところて、ビデオテープに単波長の基準信号を記録する
には、該基準信号を発生ずる独立した発振器を設けるこ
とが考えられる。
この発明は前記の独やした発振器を用いることなく、単
波長の基）Ｊｉ−信号を得ることができる磁気記録装置
又は磁気記録再生装置を提供するものである。
［課ａをＭ決するための、１′段］
上記の課題を解決−りるために、この発明では、Ｆ Ｍ
変調器に所定レベルの１６流電圧を選１１に的に入力Ｊ
る直流電圧源４：備え、前記Ｆト１変調器じ前記直流、
雷、圧を入力して青られる該Ｆ Ｍ変：Ａ器の出力ｆｉ
＝ ｔＲ記の専゛準信号として用いるようにしたもので
ある。
［作用］
１−記のように構成された磁気記録又は記り再生装置で
は、ＦＭ変調器に直流電圧源からの直流電圧が入力され
ることにより、該ＦＭ変調器からは単波長の基準信号が
得られる。[Field of Industrial Application] The present invention relates to a magnetic recording device or a magnetic recording/reproducing device such as a home VTR, and is designed to fully bring out the performance of the video tape, etc. used. . [Prior Art] Generally, in addition to normal tapes, so-called high-grade tapes having higher performance than normal tapes are used as video tapes for home VTRs. In order to fully bring out the performance of this high-grade tape, it is necessary to make the characteristics of the recording system or reproduction system different from those of normal tape. For example, the following cases can be considered as things that make this characteristic different. (2) In a recording system in which the luminance signal of a video signal is FM-modulated and magnetically recorded, the amount of emphasis of a detail emphasis circuit that emphasizes the high-frequency small-level signal component of the luminance signal before FM modulation is controlled. (2) In a recording system in which the luminance signal of a video signal is FM-modulated and magnetically recorded, equalization (2) of an FM equalizer is controlled to boost the low frequency signal component of the FM-modulated luminance signal. (2) In a reproducing system in which the reproduced luminance signal is FM demodulated, the amount of peaking of the FM beating circuit is controlled so that the FM luminance 1 before II modulation has a high frequency range. (2) In the reproduction system in which the reproduced luminance signal is FM demodulated, the amount of cancellation of the noise canceller that cancels the noise of the demodulated kI&signal is controlled (4). On the other hand, in order to automatically control the characteristics of the above-mentioned recording system or reproducing system according to the type of videotape, a mid-wavelength base 1p signal is recorded on the videotape and played back. It is conceivable to detect the level of the reference signal IJNi and store it, and to control the characteristics of the recording system or reproduction system according to the level of the stored reference signal. [Problems to be Solved by the Invention] In order to record a single-wavelength reference signal on a videotape, it is conceivable to provide an independent oscillator that generates the reference signal. The present invention provides a magnetic recording device or a magnetic recording/reproducing device that can obtain a single wavelength Ji signal without using the above-mentioned independent oscillator. [Step 1' for determining task a] In order to solve the above problem, in this invention, F M
Select the 16-current voltage of a predetermined level to the modulator and input it to 11.
a DC voltage source 4 comprising: the DC voltage source 4 for the F1 modulator;
The FM change that is blue by inputting lightning and pressure: Output fi of unit A
It is designed to be used as the exclusive signal of = tR. [Operation] In the magnetic recording or recording/reproducing device configured as described in 1- above, by inputting a DC voltage from a DC voltage source to the FM modulator, a single wavelength reference signal is output from the FM modulator. is obtained.
【実施例コ
以下に、この発明の一実施例を図について説明する。
図は家庭用のＶＴＲの記録・再生系の要部の概略を示す
ブロック図である。
図において、符号１は記録系の入力端子であり、該入力
端子にはテレビ受信機等から得られた記録すべきビデオ
信号が入力される。この入力されたビデオ信号は記録輝
Ｉ！！信号処理回路２に入力され、Ｌ Ｐ Ｆ等により
輝度信号のみが取り出される。ここで分離された高域の
クロマ信号は図示していない他の手段により処理される
。前記の取り出された輝度１８号は後述するスイッチ３
を介してＦ ｒＶ／Ｉ変調器４に入力され、ＦＭ変調さ
れる。このＦＭ変Ｗ器７に入力される。該加算器では端
子８ ｔｆｉ ；＞の低域に変換された前記クロマ信号
と加算され、記録アンプ９及び録再切換スイッチ】０を
紅でビデオへラド１１により図示していないビデオテー
プに記録される。
前記ビデオテープからビデオヘッド１１により再生され
たカラービデオ信号は再生プリアンプを経て図示してい
ないクロマ信号処理回路及び輝度信号処理回路へ供給さ
れ、図示していないＣＲＴ等によりカラー画像が再生さ
れる。上記したものはスイッチ：３を除いて周知の家庭
用ＶＴＲに用いられているものである。
図において、符号１３３は直流電圧源てあり、前記した
ように記録系・再生系の特性を使用するビデオテープに
見合うように設定する際には、前記スイッチ；（を介し
て前記ＦＭ変調器４に所定の直流電圧を入力するもので
ある。この所定の直流電圧が入力されることにより、Ｆ
Ｍ変調器４からはこの直流電圧：こ応した単波長の基準
信号（例えば３、．８ＭＨ２）が出力され、この基準信
号が前記ビデオヘット１１により前記のビデオテープに
記録される。
この記録された基準信号はビデオヘット１１により再生
され、前記再生プリアンプ１２を経て再生レベル検出器
１４に供給される。この再生レベル検出器１４で検出さ
れた基準信号の再生レベルはメモリ１５に記憶される。
該メモリに記憶された基準信号の再生レベルは比較器１
６において直流電性源１７の基準電圧と比較され、比較
誤差信号信号が記録されてこれが再生されたときのメモ
リ１５から出力される再生レベルと等しくしである。
前記コントロール信号発生器１８では前記の比較誤差信
号に応じたコントロール信号が発生され、該コントロー
ル信号は端子１９を経て記録系の図示していないデイテ
ールエンファシス回路、ＦＭイコライザ５、再生系の図
示していないＦＭピーキング回路又は図示していないノ
イズキャンセラに供給され、記録系又は再生系の特性が
制御（設定）される。
前記のような構成を有するＶＴＲでは、前記スイッチ３
により直流電圧Ｒ１３をＦＭ変調器４に接続して記録系
又は再生系の特性が設定された後、前記スイッチ３を記
録輝度信号処理回路２側に接続して前記したようにして
ビデオ信号の記録又は再生を行なう、このビデオ信号の
記録又は再生では記録系又は再生系の特性が使用するビ
デオテープの特性に見合ったものとなっているので、該
ビデオテープの性能を充分に引き出すことができる。
［発明の効果コ
この発明は上記したように、記録すべきビデオ信号の輝
度信号等の情報信号がＦＭ変調されるＦＭ変調器を記録
系に有する磁気記録又は記録再生装置であって、基準信
号を記録して再生し、この再生された信号のレベルに応
して前記情報信号の記録系又は再生系の特性を制御し、
以て前記記録系又は再生系の特性をビデオテープ等の磁
気記録媒体の特性に見合ったものに設定するようにした
ものにおいて、前記ＦＭ変調器に所定レベルの直流電圧
を選択的に入力する直流電圧源を備え、前記ＦＭ変調器
に前記直流電圧を入力して得られる該ＦＭ変調器の出力
を前記の基準信号として用いるようにしたから、独立し
た発振器を用いることなく、単波長の基準信号を発生さ
せることができ、構成を簡単ならしめ得る。[Example 1] An example of the present invention will be described below with reference to the drawings. The figure is a block diagram schematically showing the main parts of the recording/playback system of a home VTR. In the figure, reference numeral 1 denotes an input terminal of a recording system, into which a video signal to be recorded obtained from a television receiver or the like is input. This input video signal is Recorded! ! The signal is input to the signal processing circuit 2, and only the luminance signal is extracted by LPF or the like. The high frequency chroma signal separated here is processed by other means not shown. The above-mentioned extracted brightness No. 18 is sent to switch 3, which will be described later.
The signal is input to the F rV/I modulator 4 via the F rV/I modulator 4 and subjected to FM modulation. The signal is input to this FM converter 7. In the adder, the signal is added to the chroma signal converted to a low frequency signal at the terminal 8, and is recorded on a video tape (not shown) by the video controller 11 with the recording amplifier 9 and the recording/reproducing switch 0 turned red. Ru. A color video signal reproduced from the video tape by the video head 11 is supplied to a chroma signal processing circuit and a luminance signal processing circuit (not shown) via a reproduction preamplifier, and a color image is reproduced by a CRT (not shown) or the like. The above-mentioned switches, except for switch 3, are used in well-known home VTRs. In the figure, reference numeral 133 denotes a DC voltage source, and as described above, when setting the characteristics of the recording system and playback system to match the video tape used, the FM modulator 4 is connected through the switch; A predetermined DC voltage is input to the F.
The M modulator 4 outputs a single wavelength reference signal (for example, 3.8 MH2) corresponding to this DC voltage, and this reference signal is recorded on the video tape by the video head 11. This recorded reference signal is reproduced by the video head 11 and supplied to the reproduction level detector 14 via the reproduction preamplifier 12. The reproduction level of the reference signal detected by the reproduction level detector 14 is stored in the memory 15. The reproduction level of the reference signal stored in the memory is determined by the comparator 1.
6, it is compared with the reference voltage of the DC electrical source 17, and a comparison error signal is recorded and is equal to the reproduction level output from the memory 15 when it is reproduced. The control signal generator 18 generates a control signal corresponding to the comparison error signal, and the control signal is passed through a terminal 19 to a detail emphasis circuit (not shown) in the recording system, an FM equalizer 5, and a reproduction system (not shown). The signal is supplied to an FM peaking circuit (not shown) or a noise canceller (not shown), and the characteristics of the recording system or reproduction system are controlled (set). In the VTR having the above configuration, the switch 3
After connecting the DC voltage R13 to the FM modulator 4 and setting the characteristics of the recording system or reproduction system, the switch 3 is connected to the recording luminance signal processing circuit 2 side and the video signal is recorded as described above. In recording or reproducing video signals, the characteristics of the recording system or reproducing system match the characteristics of the video tape used, so the performance of the video tape can be fully utilized. [Effects of the Invention] As described above, the present invention is a magnetic recording or recording/reproducing apparatus having an FM modulator in a recording system in which an information signal such as a luminance signal of a video signal to be recorded is FM-modulated; recording and reproducing the information signal, and controlling the characteristics of the recording system or reproduction system of the information signal according to the level of the reproduced signal,
In this apparatus, the characteristics of the recording system or the reproduction system are set to match the characteristics of a magnetic recording medium such as a video tape, and a DC voltage of a predetermined level is selectively input to the FM modulator. Since the FM modulator is equipped with a voltage source and the output of the FM modulator obtained by inputting the DC voltage is used as the reference signal, a single wavelength reference signal can be generated without using an independent oscillator. can be generated and the configuration can be simplified.
図はこの発明の一実施例を示すものであり、ＶＴＲの記
録・再生系の要部の概略を示すブロック図である。
３：スイッチ、４：ＦＭ変調器、１３：直流電圧源。The figure shows one embodiment of the present invention, and is a block diagram schematically showing the main parts of a recording/reproducing system of a VTR. 3: switch, 4: FM modulator, 13: DC voltage source.
Claims (1)
系に有する磁気記録又は記録再生装置であって、 基準信号を記録して再生し、この再生された信号のレベ
ルに応じて前記情報信号の記録系又は再生系の特性を制
御し、以て前記記録系又は再生系の特性を磁気記録媒体
の特性に見合ったものに設定するようにしたものにおい
て、 前記ＦＭ変調器に所定レベルの直流電圧を選択的に入力
する直流電圧源を備え、前記ＦＭ変調器に前記直流電圧
を入力して得られる該ＦＭ変調器の出力を前記の基準信
号として用いるようにしたことを特徴とする磁気記録又
は記録再生装置。[Claims] A magnetic recording or recording/reproducing device having an FM modulator in the recording system for FM modulating an information signal to be recorded, which records and reproduces a reference signal and adjusts the level of the reproduced signal. The characteristics of the recording system or reproduction system of the information signal are controlled according to the characteristics of the information signal recording system or reproduction system, thereby setting the characteristics of the recording system or reproduction system to match the characteristics of the magnetic recording medium, wherein the FM modulation a DC voltage source that selectively inputs a DC voltage at a predetermined level to the FM modulator, and the output of the FM modulator obtained by inputting the DC voltage to the FM modulator is used as the reference signal. A magnetic recording or recording/reproducing device characterized by:
Priority Applications (19)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183198A JP2532295B2 (en) | 1990-07-11 | 1990-07-11 | Magnetic recording / reproducing device |
| US07/721,349 US5257109A (en) | 1990-07-02 | 1991-06-28 | Magnetic recording and reproducing apparatus |
| FI913193A FI913193A7 (en) | 1990-07-02 | 1991-07-01 | MAGNETISK INSPELNINGS- OCH AOTERGIVNINGSANORDNING. |
| EP96107016A EP0731605A3 (en) | 1990-07-02 | 1991-07-02 | Magnetic reproduction device with noise cancellation |
| EP96106992A EP0731604A3 (en) | 1990-07-02 | 1991-07-02 | Magnetic reproduction device with noise cancellation |
| EP96106993A EP0730375A3 (en) | 1990-07-02 | 1991-07-02 | Magnetic recording and reproducing apparatus |
| EP96107017A EP0737010A3 (en) | 1990-07-02 | 1991-07-02 | Magnetic recording and reproducing apparatus using a reference level |
| DE69125975T DE69125975T2 (en) | 1990-07-02 | 1991-07-02 | Magnetic recording and playback device |
| ES91110950T ES2103757T3 (en) | 1990-07-02 | 1991-07-02 | RECORDING AND MAGNETIC REPRODUCTION DEVICE. |
| EP91110950A EP0464772B1 (en) | 1990-07-02 | 1991-07-02 | Magnetic recording and reproducing apparatus |
| KR1019910011166A KR100216880B1 (en) | 1990-07-02 | 1991-07-02 | Magnetic recording/reproducing apparatus |
| US07/944,973 US5416641A (en) | 1990-07-02 | 1992-09-15 | Magnetic recording/reproducing apparatus including a switch for selectively supplying a reference signal to the recording unit |
| US07/944,899 US5249064A (en) | 1990-07-02 | 1992-09-15 | Noise canceller for use in a magnetic reproducing apparatus |
| US07/944,909 US5400149A (en) | 1990-07-02 | 1992-09-15 | Magnetic recording apparatus having improved detail emphasis circuit |
| US08/205,817 US5446539A (en) | 1990-07-02 | 1994-03-04 | Magnetic recording and reproducing device with selective line noise canceling |
| KR1019960026746A KR100216878B1 (en) | 1990-07-02 | 1996-07-02 | Magnetic recording apparatus having improved detail emphasis circuit |
| KR1019960026744A KR100216879B1 (en) | 1990-07-02 | 1996-07-02 | Magnetic recording/reproducing apparatus including a switch for selectively supplying a reference signal to the recording unit |
| KR1019960026747A KR100216881B1 (en) | 1990-07-02 | 1996-07-02 | Magnetic recording and reproducing apparatus with optional line noise canceller |
| KR1019960026745A KR100216876B1 (en) | 1990-07-02 | 1996-07-02 | Noise canceller for use in a magnetic reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183198A JP2532295B2 (en) | 1990-07-11 | 1990-07-11 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0469862A true JPH0469862A (en) | 1992-03-05 |
| JP2532295B2 JP2532295B2 (en) | 1996-09-11 |
Family
ID=16131488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2183198A Expired - Lifetime JP2532295B2 (en) | 1990-07-02 | 1990-07-11 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2532295B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61206970A (en) * | 1985-03-11 | 1986-09-13 | Matsushita Electric Ind Co Ltd | Video signal recording and playback device |
-
1990
- 1990-07-11 JP JP2183198A patent/JP2532295B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61206970A (en) * | 1985-03-11 | 1986-09-13 | Matsushita Electric Ind Co Ltd | Video signal recording and playback device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2532295B2 (en) | 1996-09-11 |
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