KR940007771A

KR940007771A - Automatic recording current setting method and device

Info

Publication number: KR940007771A
Application number: KR1019920016725A
Authority: KR
Inventors: 나재훈
Original assignee: 윤종용; 삼성전자 주식회사
Priority date: 1992-09-15
Filing date: 1992-09-15
Publication date: 1994-04-28

Abstract

본 발명은 영상신호 기록시 최적의 기록전류를 공급해 주기 위한 것이다. 이를 위하여 자기테이프기록재생시스템에 있어서 픽업수단과 입력원으로부터 인가되는 영상신호를 기록 및 픽업수단에서 재생되는 신호를 재생하기 위한 영상신호 처리수단과 영상신호 처리수단에서 출력되는 신호 또는 픽업수단으로부터 재생되는 신호를 증폭하기 위한 증폭수단을 구비한 기록전류 자동설정장치에 있어서, 영상신호 처리수단에서 출력되는 기록전류가 최적의 값을 갖도록 가변적인 전류증록율로서 조정하여 증폭수단으로 출력하기 위한 기록전류 조정수단과, 전류증폭율에 의해 조정되어 기록된 신호가 재생모드 제어에 의해 증폭수단을 통해 출력되는 신호의 피크포락선을 검출하기 위한 포락선 검출수단과, 포락선 검출수단에서 검출된 가변적인 전류증폭율로서 조정된 복수의 기록신호에 대한 피크포락선값을 비교하여 가장 최적의 기록전류를 공급할 수 있도록 피크포락선에 해당하는 전류증폭율로 조정하도록 기록전류 조정수단의 동작을 제어하기 위한 제어부를 포함하도록 구성된다. 따라서 인가되는 영상신호를 자기테이프의 종류에 따라서 자기테이프가 포화되지 않는 한도내의 최대전류로 기록매체에 기록함으로써 재생화질을 개선한 이점이 있다.The present invention is to provide an optimum recording current when recording a video signal. To this end, in a magnetic tape recording and reproducing system, a video signal processing means for reproducing a video signal applied from a pickup means and an input source and a signal reproduced from a recording means and a pickup means and a signal output from a video signal processing means or a pickup means A recording current automatic setting device having an amplifying means for amplifying a signal, wherein the recording current for outputting to the amplifying means is adjusted as a variable current record rate so that the recording current output from the video signal processing means has an optimal value. Envelope detection means for detecting the peak envelope of the signal which is adjusted by the adjustment means, the current amplification rate and the recorded signal is output through the amplification means by the reproduction mode control, and the variable current amplification rate detected by the envelope detection means. By comparing the peak envelope values of the plurality of recording signals adjusted as And a control unit for controlling the operation of the recording current adjusting means to adjust the current amplification factor corresponding to the peak envelope so as to supply the optimum recording current. Therefore, there is an advantage in that the reproduction quality is improved by recording the applied video signal on the recording medium at the maximum current within the limit that the magnetic tape is not saturated according to the type of the magnetic tape.

Description

Automatic recording current setting method and device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 최적 기록전류 자동설정장치의 일실시예를 나타낸 장치도,1 is a device diagram showing an embodiment of an optimum recording current automatic setting device according to the present invention;

제2도는 본 발명에 의한 최적 기록전류 자동설정방법을 설명하기 위한 흐름도,2 is a flowchart illustrating a method for automatically setting an optimal recording current according to the present invention;

제3도는 제1도의 장치도에 있어서 제어부에서 출력되는 각 파형을 나타낸 파형도이다.FIG. 3 is a waveform diagram showing each waveform output from the controller in the apparatus diagram of FIG.

Claims

A method of automatically setting an optimum recording current according to a tape type of a magnetic tape recording and reproducing system, wherein recording and reproducing operations are performed while varying the amplification ratio of a recording signal according to a preset multi-stage amplification ratio to detect the optimum recording current at the beginning of recording. A recording and playback repeat control process for controlling to perform repeatedly, an optimal recording current amplification rate setting process for setting a maximum value of the detected values detected by the recording and playback repeat control process as an amplification ratio of an optimum recording current, and the optimum recording current amplification rate And an optimum recording current amplification factor setting process for controlling the current amplification gain of the video signal to be recorded in accordance with the amplification factor set in the setting process.

The method of automatically setting an optimum recording current according to claim 1, wherein the multi-stage amplification factor is set according to the type of tape in the recording and playback repeat control process.

A video signal processing means for recording a video signal applied from a pickup means and an input source and reproducing a signal reproduced by the pickup means in a magnetic tape recording and reproducing system, and a signal output from the video signal processing means or the pickup means. An automatic recording current setting device having an amplifying means for amplifying a signal reproduced from the same, wherein the recording current output from the video signal processing means is adjusted as a variable current amplification ratio so as to have an optimum value. Recording current adjusting means for outputting the data, an envelope detecting means for detecting a peak envelope of a signal which is adjusted and recorded by the current amplification factor and outputted through the amplifying means by a reproduction mode control, and the envelope detecting means For a plurality of recorded signals adjusted as variable current amplification And a control unit for controlling the operation of the recording current adjusting means to compare the peak envelope value to adjust the current amplification factor corresponding to the peak envelope that can supply the most optimal recording current. Setting device.

4. The apparatus of claim 3, wherein the controller determines the largest value among the plurality of peak envelope values as a value capable of supplying an optimal recording current.

※ Note: The disclosure is based on the initial application.