JPS60214694A - Magnetic recorder - Google Patents

Magnetic recorder

Info

Publication number
JPS60214694A
JPS60214694A JP7081984A JP7081984A JPS60214694A JP S60214694 A JPS60214694 A JP S60214694A JP 7081984 A JP7081984 A JP 7081984A JP 7081984 A JP7081984 A JP 7081984A JP S60214694 A JPS60214694 A JP S60214694A
Authority
JP
Japan
Prior art keywords
frequency
low
signal
color
luminance signal
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
JP7081984A
Other languages
Japanese (ja)
Inventor
Motoyoshi Sasaki
佐々木　基好
Osamu Shimada
修 島田
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7081984A priority Critical patent/JPS60214694A/en
Publication of JPS60214694A publication Critical patent/JPS60214694A/en
Pending legal-status Critical Current

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
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal

Abstract

PURPOSE:To perform a low frequency conversion with the same frequency as a local frequency used for a color system and to improve a frequency characteristic by separating luminance signal components at the high frequency side by means of a comb-shaped filter. CONSTITUTION:A video signal is inputted to a BPF1, HPF5 and an LPF9 of a magnetic recorder, and color video signal components passing through the BPF1 are converted into low-frequency by means of a convertor 4. A luminance signal system is separated into two systems by a comb-shaped filter 2 and a subconvertor 3. Furthermore, the low-frequency side luminance signal whose color components are removed by the LPF9 is frequency-modulated in a modulator 10. The video signal through the HPF5 is added to a comb-shaped filter 6, converted into low-frequency in a convertor 7 by the local frequency from the subconvertor 4 after its color components are removed, and finally overlapped with a low- frequency conversion color signal by a mixer 8. The signal obtained in such a way is overlapped with the low frequency luminance signal which is frequency- modulated by a mixer 11, and made into a recording signal.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は磁気記録装置の高精細化に関するものである。[Detailed description of the invention] [Field of application of the invention] The present invention relates to high definition magnetic recording devices.

〔発明の背景〕[Background of the invention]

従来この種の装置の輝度信号記録系はローパスフィルタ
によってカラー成分を除去したのち周波数変調し、低域
変換されたカラー信号とともに記録する方式であった。Conventionally, the luminance signal recording system of this type of apparatus has been a system in which color components are removed by a low-pass filter, frequency-modulated, and recorded together with a low-pass-converted color signal.

このローパスフィルタの特性により高域側の輝度信号が
カットされるため、周波数特性が劣化し高精細化を計る
ことができないという木魚を有していた。Due to the characteristics of this low-pass filter, the brightness signal on the high frequency side is cut, so the frequency characteristics deteriorate and high definition cannot be achieved.

〔発明の目的〕[Purpose of the invention]

従って本発明の目的は、輝度信号系の周波数特性の改善
によって高精細化を計る信号処理回路を提供することに
ある。Therefore, an object of the present invention is to provide a signal processing circuit that achieves high definition by improving the frequency characteristics of a luminance signal system.

〔発明の概要〕[Summary of the invention]

このため本発明は、高域側の輝度信号成分をクシ形フィ
ルタを用いることによって分離し、カラー信号系に用い
られているローカル周波数と同一周波数を用いてコンバ
ートし低域変換カラー信号に重畳する回路を用けだもの
である。Therefore, the present invention separates the brightness signal component on the high frequency side using a comb filter, converts it using the same frequency as the local frequency used in the color signal system, and superimposes it on the low frequency converted color signal. It uses circuits.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を図により説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

ビデオ信号は、１バンドパスフイルタ、５バイパスフイ
ルタ、９０−バスフィルタに入力される。１バンドパス
フイルタを経たカラー信号成分は４コンバータにより低
域変換される。輝度信号系は２バイパスフイルタ、３０
−パスフィルタにより二系統に分離される。ローパスフ
ィルタによりカラー成分を除去した低域側輝度信号は、
従来同様１０モジユレータにより周波数変調される。一
方５バイパスフィルタを経たビデオ信号は、６クシ形フ
イルタによりカラー成分を除去したのち３サブコンバー
タからのローカル周波数により７コンバータに鉛いて低
域変換され、８ミキサーで低域変換カラー信号に重畳さ
れる。またこのとき用いられるローカル周波数はカラー
系に用いられるものと同一のものである。この信号は１
１ミキサーで、先に述べた周波数変調された低域輝度信
号と重畳され記録信号となる。以上述べた様に１本実施
例によれば、カラー信号の影響をうけることなく、高域
の輝度信号を取り出すことができるので、周波数特性の
改善を計ることができる。The video signal is input to a 1 band pass filter, a 5 bypass filter, and a 90-bus filter. The color signal component that has passed through the 1-band pass filter is low frequency converted by 4 converters. The luminance signal system has 2 bypass filters, 30
- Separated into two systems by a pass filter. The low-frequency side luminance signal from which color components have been removed by a low-pass filter is
Frequency modulation is performed by 10 modulators as in the conventional case. On the other hand, the video signal that has passed through 5 bypass filters has its color components removed by 6 comb filters, and then is sent to converter 7 for low-frequency conversion using the local frequency from 3 sub-converters, and is superimposed on the low-frequency converted color signal by mixer 8. Ru. Further, the local frequency used at this time is the same as that used for the color system. This signal is 1
1 mixer, the signal is superimposed with the frequency-modulated low-band luminance signal described above to become a recording signal. As described above, according to this embodiment, it is possible to extract a high-frequency luminance signal without being affected by a color signal, so that frequency characteristics can be improved.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、従来ローパスフィルタによりてカット
されていた３ＭＨ２以上の高域側の輝度信号をも取り出
し記録信も・とじて処理することができるので、周波数
特性を大幅に改善することができ、高精細化を計ること
ができる。According to the present invention, it is possible to extract the luminance signal on the high frequency side of 3MH2 or higher, which was conventionally cut by a low-pass filter, and process it together with the recorded signal, so the frequency characteristics can be significantly improved. , high definition can be achieved.

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

図は本発明の一実施例を示すシステムブロック図である
。 １　・バンドパスフィルタ ２・・クシ形フィルタ、３・・・サブコンバータ４・・
・コンバータ ５・・バイパスフィルタ、　６・・クシ形フィルタ７・
・・コンバータ、　８・・ミキサー９・・ローパスフィ
ルタ、１０・・モジュレータ１１・・・ミキサー。The figure is a system block diagram showing one embodiment of the present invention. 1 ・Band pass filter 2...Comb filter, 3...Sub converter 4...
・Converter 5... Bypass filter, 6... Comb filter 7.
Converter, 8 Mixer 9 Low pass filter, 10 Modulator 11 Mixer.

Claims (1)

【特許請求の範囲】[Claims] １、輝度信号の記録系回路において、クシ形フィルタを
用い、高域側の輝度信号をこのクシ形フィルタを通し、
カラー系に用いられるローカル周波数と同一周波数を用
いて低域変換することを特徴とする磁気記録装置。1. In the luminance signal recording circuit, a comb-shaped filter is used, and the luminance signal on the high frequency side is passed through this comb-shaped filter.
A magnetic recording device characterized by performing low frequency conversion using the same frequency as the local frequency used for color systems.
JP7081984A 1984-04-11 1984-04-11 Magnetic recorder Pending JPS60214694A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7081984A JPS60214694A (en) 1984-04-11 1984-04-11 Magnetic recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7081984A JPS60214694A (en) 1984-04-11 1984-04-11 Magnetic recorder

Publications (1)

Publication Number Publication Date
JPS60214694A true JPS60214694A (en) 1985-10-26

Family

ID=13442561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7081984A Pending JPS60214694A (en) 1984-04-11 1984-04-11 Magnetic recorder

Country Status (1)

Country Link
JP (1) JPS60214694A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269889A (en) * 1987-04-28 1988-11-08 Victor Co Of Japan Ltd Magnetic recording and reproducing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269889A (en) * 1987-04-28 1988-11-08 Victor Co Of Japan Ltd Magnetic recording and reproducing device

Similar Documents

Publication Publication Date Title
ATE28543T1 (en) SYSTEM FOR SEPARATION OF SIGNALS WITH REDUCED DATA FLOW.
US2909596A (en) Apparatus for magnetically recording electrical waves
JPH03104395A (en) Video signal processing circuit
US4007483A (en) Circuit for processing a color television signal prior to magnetic recording and corresponding restoring circuit
JPS60214694A (en) Magnetic recorder
KR870010536A (en) Noise Reduction Circuit of FM Recording System
JPS6146682A (en) Magnetic recording and recording device
JPS6170891A (en) High resolution signal converting device of television signal
JPH0418122Y2 (en)
JPS62277884A (en) Video signal recorder
JPS60192491A (en) Color signal separating circuit of magnetic video recording and reproducing device
JPH04247793A (en) Magnetic recording and reproducing device
JPS61161892A (en) Magnetic recording system of composite color television signal
JPS57181290A (en) Recording device for video signal
JPH04152791A (en) Magnetic recording and reproducing device
SU458865A1 (en) Magnetic recording apparatus playback channel
JPS60249495A (en) Magnetic picture recording and reproducing device
JPS6184195A (en) Magnetic recording and reproducing device
JPS5583389A (en) Recording and reproducing system for secam type color television signal
JPS6236995A (en) Signal processor
JPS6343488A (en) Video signal reproducing device
JPS63136789A (en) Frequency converter
JPS5840395B2 (en) FM modulation method
JPS62292090A (en) Magnetic video recording and reproducing system
JPS5929879U (en) magnetic recording and reproducing device