JPS6374288A - Recording and reproducing device for video signal - Google Patents
Recording and reproducing device for video signalInfo
- Publication number
- JPS6374288A JPS6374288A JP61218793A JP21879386A JPS6374288A JP S6374288 A JPS6374288 A JP S6374288A JP 61218793 A JP61218793 A JP 61218793A JP 21879386 A JP21879386 A JP 21879386A JP S6374288 A JPS6374288 A JP S6374288A
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- JP
- Japan
- Prior art keywords
- signal
- recording
- pass filter
- color difference
- reproduction
- 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.)
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Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 230000000903 blocking effect Effects 0.000 claims 2
- 239000002131 composite material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は映像信号の記録再生装置に係り、特に、モノク
ロとカラーによる映像信号の記録／再生を行うに好適な
映像信号の記録再生装置に関する〔発明の背景〕
最近、固体撮像素子や撮像管等の過像ディバイスと、記
録媒体として安価で比較的記憶容量の大きな磁気ディス
クを用いた記録装置とを組み合わせ、被写体を電子的に
撮影してその静止画像を磁気ディスクに記録し、画像の
再生は別途に設けられたテレビジョンシステムやプリン
タ等で行う電子スチルカメラシ、ステムが開発されてい
る。また、通常のフィルムや印画紙などの可視記録媒体
に記録された静止画像を撮影して磁気ディスクに記録す
る映像磁気記録システム、及び磁気ディスク上から映像
信号を読み出してこれをテレビジョン等に写し出す映像
再生システムも実現されているところでこのような従来
の磁気記録再生装置においては、映像信号のうち輝度信
号を所定の周波数域にＦＭ変調する輝度信号記録系と、
前記映像信号のうち色差信号を所定の周波数にＦＭ変調
するクロマ信号記録系とを有しており、これら画記録系
から得られる信号に基づいて映像信号のカラー記録を行
うように構成されている。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a video signal recording and reproducing device, and more particularly to a video signal recording and reproducing device suitable for recording and reproducing monochrome and color video signals. BACKGROUND OF THE INVENTION Recently, it has been possible to electronically photograph a subject by combining an overimage device such as a solid-state image sensor or an image pickup tube with a recording device that uses a magnetic disk, which is inexpensive and has a relatively large storage capacity, as a recording medium. Electronic still camera systems have been developed that record still images on magnetic disks and reproduce the images using a separately provided television system, printer, or the like. In addition, there is a video magnetic recording system that captures still images recorded on visible recording media such as ordinary film and photographic paper and records them on a magnetic disk, and a video magnetic recording system that reads video signals from the magnetic disk and displays them on a television etc. In such a conventional magnetic recording and reproducing device where a video reproduction system has also been realized, a luminance signal recording system that FM modulates a luminance signal of the video signal into a predetermined frequency range;
It has a chroma signal recording system that FM modulates the color difference signal of the video signal to a predetermined frequency, and is configured to perform color recording of the video signal based on the signals obtained from these image recording systems. .
この場合に前記輝度信号記録系には輝度信号の全帯域の
うち輝度信号及び色差信号の各々の周波数特性が交叉す
る周波数付近より高域側の周波数域の信号成分を通過さ
せるハイパスフィルタを含んでおり、モノクロ記録時は
このハイパスフィルタにより抽出された輝度信号に基づ
いて映像信号の記録が行われるように構成され且つクロ
マ信号記録系の出力信号は遮断され、記録されないよう
に構成されていた。In this case, the luminance signal recording system includes a high-pass filter that passes signal components in a frequency range higher than the frequency where the frequency characteristics of the luminance signal and color difference signal intersect among the entire luminance signal band. During monochrome recording, the video signal is recorded based on the luminance signal extracted by the high-pass filter, and the output signal of the chroma signal recording system is cut off so that it is not recorded.
従って輝度信号のうち輝度信号及び色差信号の各々の周
波数特性が交叉する周波数より低域の信号成分が遮断さ
れ、またクロマ信号成分が輝度信号に重畳される等の現
象が生じ高解像度の画像が得られないという問題があっ
た。Therefore, the signal components of the luminance signal lower than the frequency at which the frequency characteristics of the luminance signal and color difference signal intersect are blocked, and phenomena such as chroma signal components being superimposed on the luminance signal occur, resulting in a high-resolution image. The problem was that I couldn't get it.
〔発明の目的〕
本発明はこのような事情に鑑みてなされたものであり、
高解像度でモノクロ画像の記録及び再生を行うことがで
きる映像信号の記録再生装置を提供することを目的とす
るものである。[Object of the invention] The present invention has been made in view of the above circumstances, and
It is an object of the present invention to provide a video signal recording and reproducing device capable of recording and reproducing monochrome images at high resolution.
本発明は上記目的を達成するために輝度信号及び色差信
号を各々所定の周波数でＦＭ変調して記録し、または各
々所定の周波数でＦＭ変調され記録された輝度信号及び
色差信号をＦＭ復調して再生する映像信号の記録再生装
置において、輝度信号記録系または輝度信号再生系は記
録信号の全帯域のうち輝度信号及び色差信号の各々の周
波特性曲線が交叉する周波数付近より高域側の周波数域
の信号成分を通過させるハイパスフィルタを含み、モノ
クロ記録再生時に該ハイパスフィルタをバイパスさせる
伝送路を形成するバイパス手段と、モノクロ記録再生時
に色差信号記録再生系から出力される色差信号を遮断す
る信号遮断手段とを存することを特徴とするものである
。In order to achieve the above object, the present invention records a luminance signal and a color difference signal by FM modulating each at a predetermined frequency, or performs FM demodulation of a luminance signal and a color difference signal which have been FM modulated and recorded at a predetermined frequency. In a recording/reproduction device for a video signal to be reproduced, the luminance signal recording system or luminance signal reproduction system operates in a frequency range higher than the frequency near the intersection of the respective frequency characteristic curves of the luminance signal and the color difference signal among the entire band of the recorded signal. bypass means that includes a high-pass filter that passes a signal component and forms a transmission path that bypasses the high-pass filter during monochrome recording and playback; and a signal cutoff that blocks color difference signals output from the color difference signal recording and playback system during monochrome recording and playback. It is characterized by comprising means.
以下、添付図面に従って本発明に係る映像信号の記録再
生装置の好ましい実施例を詳説する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a video signal recording and reproducing apparatus according to the present invention will be described in detail below with reference to the accompanying drawings.
第１図には本発明に係る映像信号の記録再生装置の記録
系の一実施例の構成が示されている。同図において、デ
コーダ１０は１変信号記録系のＦＭ変調器１２とクロマ
信号記録系のＦＭ変調器１４に接続され、ＦＭ変調器１
２は周波数補正回路１６、ハイパスフィルタ１８、スイ
ッチ２０を介して混合器２２に接続されている。FIG. 1 shows the configuration of an embodiment of a recording system of a video signal recording/reproducing apparatus according to the present invention. In the figure, a decoder 10 is connected to an FM modulator 12 of a 1-variant signal recording system and an FM modulator 14 of a chroma signal recording system.
2 is connected to a mixer 22 via a frequency correction circuit 16, a high-pass filter 18, and a switch 20.
一方ＦＭ変調器１４は周波数補正回路２４、ローパスフ
ィルタ２６、スイッチ２８を介して混合器２２に接続さ
れている。そして混合器２２は記録用増幅器３０を介し
て磁気ヘッド３２に接続されている。On the other hand, the FM modulator 14 is connected to the mixer 22 via a frequency correction circuit 24, a low-pass filter 26, and a switch 28. The mixer 22 is connected to a magnetic head 32 via a recording amplifier 30.
デコーダ１０には複合同期信号を含む映像信号が供給さ
れ、この映像信号はデコーダ１ｏによって複合同期信号
を含む輝度信号と、色差信号Ｒ−Ｙ、Ｂ−Ｙに分離され
、それぞれＦＭ変調器１２、工４へ供給される。複合同
期信号を含む輝度信号はＦＭ変調器１２によって高域側
にＦＭ変調され、周波数補正回路１６を介してハイパス
フィルタ１８に出力される。ハイパスフィルタ１８は輝
度信号及び色差信号の各々の周波数特性が交叉する周波
数、例えば２．５ＭＨｚ以上の信号を通過させるように
構成されており、カラー記録時には輝度信号のうち２．
５ＭＨ２以上の信号がスイッチ２０を介して混合器２２
へ供給される。A video signal containing a composite synchronization signal is supplied to the decoder 10, and this video signal is separated by the decoder 1o into a luminance signal containing the composite synchronization signal and color difference signals R-Y and B-Y. It is supplied to factory 4. The luminance signal including the composite synchronization signal is FM-modulated to the high frequency side by the FM modulator 12 and output to the high-pass filter 18 via the frequency correction circuit 16. The high-pass filter 18 is configured to pass a signal having a frequency at which the frequency characteristics of the luminance signal and the color difference signal intersect, for example, a signal of 2.5 MHz or more.
A signal of 5MH2 or more is sent to the mixer 22 via the switch 20.
supplied to
一方、色差信号Ｒ−Ｙ、Ｂ−ＹはＦＭ変調器１４によっ
て低域側にＦＭ変調され、周波数補正回路２４を介して
ローパスフィルタ２６に出方される。ローパスフィルタ
２６は輝度信号及び色差信号の各々の周波数特性が交叉
する周波数、例えば２．５ＭＨｚ以下の信号成分のみを
通過させるように構成されているので、カラー記録時に
は変調映像信号のうち２．５ＭＨｚ以下の信号がスイッ
チ２８を介して混合器２２へ出力される。そして輝度信
号記録系から出力された信号とクロマ信号記録系から出
力された信号とが混合器２２で混合され増幅器３０へ出
力される。この信号は所定のレベルに増幅された後磁気
ヘフド３２に供給され、磁気ディスク等の回転記録媒体
に磁気記録される。On the other hand, the color difference signals R-Y and B-Y are FM-modulated to the lower frequency side by the FM modulator 14 and output to the low-pass filter 26 via the frequency correction circuit 24. The low-pass filter 26 is configured to pass only signal components at frequencies below 2.5 MHz, for example, frequencies at which the frequency characteristics of the luminance signal and the color difference signal intersect, so that 2.5 MHz of the modulated video signal is passed during color recording. The following signals are output to mixer 22 via switch 28. The signal output from the luminance signal recording system and the signal output from the chroma signal recording system are mixed by a mixer 22 and output to an amplifier 30. This signal is amplified to a predetermined level and then supplied to the magnetic head 32, where it is magnetically recorded on a rotating recording medium such as a magnetic disk.
ここで、本実施例においては、スイッチ２０．２８を信
号選択手段として機能させるために、スイッチ２０の接
点２０ｂがハイパスフィルタ１８の入力側に接続され、
スイッチ２８の接点２８ｂが接地されている。即ち、モ
ノクロによる記録時にはスイッチ２０．２８の作動によ
ってハイパスフィルタ１８を迂回する信号伝送路を輝度
信号記録系に形成すると共に、ローパスフィルタ２６の
出力側を遮断する信号伝送路をクロマ信号記録系に形成
するように構成されている。このため、本実施例によれ
ば、モノクロによる記録時には周波数補正回路１６の出
力信号がハイパスフィルタ１８を迂回して、直接スイッ
チ２０を介して混合器２２に出力され、ローパスフィル
タ２６の出力側が遮断され、混合器２２の入力側が接地
される。In this embodiment, in order to make the switch 20.28 function as a signal selection means, the contact 20b of the switch 20 is connected to the input side of the high-pass filter 18.
A contact 28b of the switch 28 is grounded. That is, when recording in monochrome, a signal transmission path that bypasses the high-pass filter 18 is formed in the luminance signal recording system by operating the switch 20.28, and a signal transmission path that blocks the output side of the low-pass filter 26 is formed in the chroma signal recording system. configured to form. Therefore, according to this embodiment, when recording in monochrome, the output signal of the frequency correction circuit 16 bypasses the high-pass filter 18 and is directly output to the mixer 22 via the switch 20, and the output side of the low-pass filter 26 is cut off. The input side of the mixer 22 is grounded.
これにより磁気ヘッド３２にはクロマ信号が出力される
ことはなく、また輝度信号の全帯域（０〜１０ＭＨｚ）
に亘る信号成分が磁気ヘッド３２に出力され、モノクロ
による記録時に高解像度の画像を記録することができる
。As a result, no chroma signal is output to the magnetic head 32, and the entire brightness signal band (0 to 10 MHz) is output to the magnetic head 32.
The signal components covering the range are output to the magnetic head 32, and a high resolution image can be recorded during monochrome recording.
一方、再生系は、第２図に示されるように、再生用増幅
器３４、ハイパスフィルタ３６、スイッチ３８、周波数
補正回路４０．ＦＭ復調器４２、（８号処理回路４４、
エンコーダ４６、ローパスフィルタ４８、スイッチ５０
、周波数補正回路５２、ＦＭ復調器５４、信号処理回路
５６から構成されている。On the other hand, as shown in FIG. 2, the reproduction system includes a reproduction amplifier 34, a high-pass filter 36, a switch 38, a frequency correction circuit 40. FM demodulator 42, (No. 8 processing circuit 44,
Encoder 46, low pass filter 48, switch 50
, a frequency correction circuit 52, an FM demodulator 54, and a signal processing circuit 56.
磁気ヘッド３２の出力信号は増幅器３４によって所定の
レベルに増幅された後、輝度信号再生系に含まれるハイ
パスフィルタ３６に出力されると共に、クロマ信号再生
系を構成するローパスフィルタ４８に出力される。ハイ
パスフィルタ３６はハイパスフィルタ１８と同様に輝度
信号及び色差信号の各々の周波数特性が交叉する周波数
、例えば２．５ＭＨｚ以上の信号を通過させるように構
成されており、磁気ヘッド３２により得られる再生信号
のうち２．５ＭＨｚ以上の信号成分がハイパスフィルタ
３６、スイッチ３８、周波数補正回路４０を介してＦＭ
復調器４２に出力される。ＦＭ復調器４２からはベース
バンドの輝度信号Ｙが出力され、この信号は信号処理回
路４４を介してエンコーダ４６へ出力される。The output signal of the magnetic head 32 is amplified to a predetermined level by an amplifier 34, and then output to a high-pass filter 36 included in the luminance signal reproduction system, and also to a low-pass filter 48 constituting the chroma signal reproduction system. Like the high-pass filter 18, the high-pass filter 36 is configured to pass a signal having a frequency at which the frequency characteristics of the luminance signal and the color difference signal intersect, for example, a signal of 2.5 MHz or more, and the reproduced signal obtained by the magnetic head 32. Of these, signal components of 2.5 MHz or higher are converted to FM via a high-pass filter 36, a switch 38, and a frequency correction circuit 40.
The signal is output to the demodulator 42. The FM demodulator 42 outputs a baseband luminance signal Y, and this signal is output to the encoder 46 via the signal processing circuit 44.
一方、ローパスフィルタ４８は２．５ＭＨｚ以下の信号
成分を通過させるように構成されており、再生されたＦ
Ｍ状態の映像信号のうち２．５ＭＨｚ以下の信号成分の
みがローパスフィルタ４８、スイッチ５０、周波数補正
回路５２を介してＦＭ復調器５４に出力される。そして
ＦＭ復調器５４からはベースバンドの線順次色差信号が
出力される。この線順次化された色差信号は信号処理回
路５６で同時化され、エンコーダ４６に出力される。エ
ンコーダ４６からは所定のフォーマット （例えばＮＴ
ＳＣ方式）の映像信号が出力される。On the other hand, the low-pass filter 48 is configured to pass signal components of 2.5 MHz or less, and the regenerated F
Only signal components of 2.5 MHz or less of the M-state video signal are output to the FM demodulator 54 via the low-pass filter 48, switch 50, and frequency correction circuit 52. Then, the FM demodulator 54 outputs a baseband line-sequential color difference signal. This line-sequential color difference signal is synchronized by the signal processing circuit 56 and output to the encoder 46. The encoder 46 outputs a predetermined format (for example, NT
SC system) video signal is output.
そしてこの映像信号はＣＲＴ制御回路、ＣＲＴに出力さ
れ、ＣＲＴの画面上に画像表示される。This video signal is then output to a CRT control circuit and CRT, and an image is displayed on the screen of the CRT.
ここで、本実施例においては、スイッチ３８．５０を信
号選択手段として機能させるために、スイッチ３８の接
点３８ｂがハイパスフィルタ３６の入力側に接続され、
スイッチ５０の接点５０ｂが接地されている。このため
モノクロによる再生時には増幅器３４の出力信号がハイ
パスフィルタ３６を迂回して直接スイッチ３８を介して
周波数補正回路４０に出力され、かつクロマ信号の出力
はスイッチ５０の作動によって阻止され、周波数補正回
路５２の入力側が接地される。このためモノクロによる
再生時にはベースバンドの輝度信号全帯域（０〜１０Ｍ
Ｈｚ）に亘る信号成分がエンコーダ４６に出力されると
共に、クロマ信号はエンコーダ４６に出力されなくなる
。これによりモノクロ再生時にＧ１高解像度の画像を得
ることができる。Here, in this embodiment, in order to make the switch 38.50 function as a signal selection means, the contact 38b of the switch 38 is connected to the input side of the high-pass filter 36.
A contact 50b of the switch 50 is grounded. Therefore, during monochrome reproduction, the output signal of the amplifier 34 bypasses the high-pass filter 36 and is directly output to the frequency correction circuit 40 via the switch 38, and the output of the chroma signal is blocked by the operation of the switch 50, and the frequency correction circuit The input side of 52 is grounded. Therefore, during monochrome playback, the entire baseband luminance signal band (0 to 10M
Hz) is output to the encoder 46, and the chroma signal is no longer output to the encoder 46. This makes it possible to obtain G1 high resolution images during monochrome playback.
なお、スイッチ２０．２８．３８．５０はそれぞれメカ
ニカルスイッチやアナログスイッチによって構成しても
良い。Note that the switches 20, 28, 38, and 50 may each be configured by a mechanical switch or an analog switch.
以上説明したように、本発明ではモノクロによる記録時
にはクロマ信号を遮断し且つ輝度信号の全帯域の信号成
分を用いて記録するように構成したので、本発明によれ
ば簡単な回路構成によって高解像度のモノクロ再生画像
を得ることができるAs explained above, in the present invention, when recording in monochrome, the chroma signal is blocked and the signal components of the entire band of the luminance signal are used for recording. It is possible to obtain a monochrome reproduction image of
第１図は本発明に係る映像信号の記録再生装置の記録系
の一実施例を示す構成図、第２図は本発明に係る映像信
号の記録再生装置の再生系の一実施例の構成図である。
１２．１４・・・ＦＭ変調器、 １８．３６・・・ハ
イパスフィルタ、 ２０．２８．３８．５０・・・ス
イッチ、 ２６．４８・・・ローパスフィルタ、４２
．５４・・・ＦＭ復調器。FIG. 1 is a block diagram showing an embodiment of a recording system of a video signal recording/playback apparatus according to the present invention, and FIG. 2 is a block diagram of an embodiment of a playback system of a video signal recording/playback apparatus according to the present invention. It is. 12.14...FM modulator, 18.36...High pass filter, 20.28.38.50...Switch, 26.48...Low pass filter, 42
．． 54...FM demodulator.
Claims (1)
て記録し、または各々所定の周波数でＦＭ変調され記録
された輝度信号及び色差信号をＦＭ復調して再生する映
像信号の記録再生装置において、 輝度信号記録系または輝度信号再生系は記録信号の全帯
域のうち輝度信号及び色差信号の各々の周波特性曲線が
交叉する周波数付近より高域側の周波数域の信号成分を
通過させるハイパスフィルタを含み、 モノクロ記録再生時に該ハイパスフィルタをバイパスさ
せる伝送路を形成するバイパス手段と、モノクロ記録再
生時に色差信号記録再生系から出力される色差信号を遮
断する信号遮断手段とを有することを特徴とする映像信
号の記録再生装置。[Scope of Claims] A video signal in which a luminance signal and a color difference signal are each FM modulated at a predetermined frequency and recorded, or a luminance signal and a color difference signal which are each FM modulated and recorded at a predetermined frequency are FM demodulated and reproduced. In the recording and reproducing apparatus, the luminance signal recording system or the luminance signal reproducing system records signal components in a frequency range higher than the frequency where the respective frequency characteristic curves of the luminance signal and color difference signal intersect, out of the entire band of the recorded signal. A bypass means for forming a transmission path that includes a high-pass filter for passing through the high-pass filter and bypasses the high-pass filter during monochrome recording and reproduction, and a signal blocking means for blocking the color difference signal output from the color difference signal recording and reproduction system during monochrome recording and reproduction. A video signal recording and reproducing device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61218793A JPS6374288A (en) | 1986-09-17 | 1986-09-17 | Recording and reproducing device for video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61218793A JPS6374288A (en) | 1986-09-17 | 1986-09-17 | Recording and reproducing device for video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6374288A true JPS6374288A (en) | 1988-04-04 |
Family
ID=16725453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61218793A Pending JPS6374288A (en) | 1986-09-17 | 1986-09-17 | Recording and reproducing device for video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6374288A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63191787U (en) * | 1987-05-27 | 1988-12-09 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55120288A (en) * | 1979-03-09 | 1980-09-16 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
| JPS59169285A (en) * | 1983-03-16 | 1984-09-25 | Canon Inc | Picture recording system |
-
1986
- 1986-09-17 JP JP61218793A patent/JPS6374288A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55120288A (en) * | 1979-03-09 | 1980-09-16 | Matsushita Electric Ind Co Ltd | Magnetic recording and reproducing device |
| JPS59169285A (en) * | 1983-03-16 | 1984-09-25 | Canon Inc | Picture recording system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63191787U (en) * | 1987-05-27 | 1988-12-09 |
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