KR940022447A - Tape type discrimination method and recording circuit of recording and reproducing apparatus - Google Patents

Tape type discrimination method and recording circuit of recording and reproducing apparatus Download PDF

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Publication number
KR940022447A
KR940022447A KR1019930003401A KR930003401A KR940022447A KR 940022447 A KR940022447 A KR 940022447A KR 1019930003401 A KR1019930003401 A KR 1019930003401A KR 930003401 A KR930003401 A KR 930003401A KR 940022447 A KR940022447 A KR 940022447A
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KR
South Korea
Prior art keywords
recording
tape
frequency
output
signal
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KR1019930003401A
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Korean (ko)
Inventor
정문채
최영준
신관보
조도현
김승일
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이헌조
주식회사 금성사
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Priority to KR1019930003401A priority Critical patent/KR940022447A/en
Publication of KR940022447A publication Critical patent/KR940022447A/en

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Abstract

본 발명은 기록재생장치의 테이프 종류 판별방법 및 그 회로에 관한 것으로, 종래에는 테이프의 종류에 상관없이 신호를 기록하거나 선택기능을 잘못선택하여 기록신호의 감도를 저하시키는 문제점이 있었다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape type discrimination method and a circuit thereof of a recording and reproducing apparatus. In the related art, there is a problem of degrading the sensitivity of a recording signal by recording a signal regardless of the type of tape or by incorrectly selecting a selection function.

이러한 점을 감안하여 본 발명에서는 기록모드 초기에 테이프의 1트랙에 스윕주파수를 기록한 후 재생하여 최대 포락선 신호에 따른 주파수를 검출하고, 이 검출주파수를 테이프 주파수 특성 테이블과 비교하여 테이프의 종류를 판별하게 된다. 이에따라, 기록 신호를 테이프의 자성특성에 따라 보상하여 최적의 상태로 기록하게 된다.In view of this point, in the present invention, the sweep frequency is recorded on one track of the tape at the beginning of the recording mode and reproduced to detect the frequency according to the maximum envelope signal, and the type of tape is determined by comparing the detected frequency with the tape frequency characteristic table. Done. As a result, the recording signal is compensated according to the magnetic characteristics of the tape, thereby recording in an optimal state.

Description

기록재생장치의 테이프 종류 판별방법 및 그 회로Tape type discrimination method and recording circuit of recording and reproducing apparatus

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

제1도는 본 발명 기록재생장치의 테이프 종류 판별회로의 블럭도,1 is a block diagram of a tape type discrimination circuit of the recording and reproducing apparatus of the present invention;

제2도는 본 발명에 따른 테이프 종류 판별시 신호 흐름도.2 is a signal flow chart for determining the tape type according to the present invention.

Claims (2)

기록명령(CREC)이 있을 때 테이프 종류 선택명령의 유무를 판별하는 제1단계와, 제1단계에서 테이프 종류선택 명령이 있으면 이 명령에 따라 입력신호의 주파수 특성을 보상하여 기록하는 제2단계와, 제1단계에서 테이프 종류 선택명령이 없으면 테이프의 주행을 정지시켜 일정 트랙에 스윕주파수(fSW)을 기록하는 제3단계와, 제3단계에서 기록동작이 완료되면 기록된 스윕주파수(fSW)를 재생하여 최대 포락선 신호에 따른 주파수를 검출하는 제4단계와, 제4단계에서 검출한 주파수(V3)를 테이프 주파수 특성에 따른 테이블과 비교하여 테이프 종류를 판별하고 이에 따라 최적상태로 기록동작을 수행하는 제5단계로 이루어진 기록 재생장치의 테이프 종류 판별방법.A first step of determining whether there is a tape type selection command when there is a recording command (C REC ), and a second step of compensating and recording the frequency characteristic of an input signal according to this command if there is a tape type selection command in the first step And a third step of recording the sweep frequency f SW on a predetermined track by stopping the tape running if there is no tape type selection command in the first step, and the recorded sweep frequency f when the recording operation is completed in the third step. SW is regenerated to detect the frequency according to the maximum envelope signal, and the frequency (V 3 ) detected in the fourth step is compared with the table according to the tape frequency characteristics to determine the tape type and accordingly A tape type discrimination method of a recording and reproducing apparatus, comprising a fifth step of performing a recording operation. 기록명령(CREC)이 입력될때 외부의 테이프 종류 판별명령에 따라 캡스턴 구동부(4)를 제어하여 테이프의 주행을 정지시킴과 아울러 주파수 발생부(2)를 제어하여 스윕주파수(fSW)를 발생시키고 시스템의 전체동작을 제어하는 제어부(1)와, 상기 주파수 발생부(2)의 출력(fw)을 일정레벨 증폭하여 헤드(HD1)를 통해 기록하는 기록앰프(3)와, 기록이 완료된후 상기 헤드(HD1)의 검출신호(Vi)를 소정레벨 증폭하는 프리앰프(5)와, 이 프리엠프(5)의 출력(V1)을 입력받아 포락선 신호(V2)를 검출하는 포락선신호 검출부(6)와, 이 포락선 신호검출부(6)의 출력(V2)을 상기 주파수 발생부(2)의 출력(fSW)과 비교하여 최대 포락선 신호에 따른 주파수(Vz)를 검출하는 최대 주파수 검출부(7)와, 이 최대주파수 검출부(7)의 출력(V3)을 테이프 주파수 특성 테이블(9)과 비교하여 테이프 종류를 판별하는 테이프 특성 판별부(8)와, 이 테이프 특성 판별부(8)의 출력(V4)에 따라 기록할 신호의 주파수 특성을 보상하는 주파수 특성 보상부(10)와, 이 주파수 특성 보상부(10)의 출력(V3)을 테이프 기록하는 신호기록부(11)로 구성함을 특징으로 하는 기록재생장치의 테이프 종류 판별회로.When the recording command (C REC ) is input, the capstan driving unit 4 is stopped according to the external tape type discrimination command, and the driving of the tape is stopped, and the frequency generating unit 2 is controlled to generate the sweep frequency f SW . A control unit 1 for controlling the overall operation of the system, a recording amplifier 3 for amplifying the output f w of the frequency generator 2 by a predetermined level and recording the data through the head HD 1 , and After completion, the preamplifier 5 amplifies the detection signal Vi of the head HD 1 by a predetermined level and the output V 1 of the preamplifier 5 detects the envelope signal V 2 . The envelope signal detector 6 and the output V 2 of the envelope signal detector 6 are compared with the output f SW of the frequency generator 2 to detect the frequency V z according to the maximum envelope signal. Comparing the maximum frequency detector 7 and the output V 3 of the maximum frequency detector 7 with the tape frequency characteristic table 9 A tape characteristic discriminating unit 8 for discriminating the type of tape, a frequency characteristic compensating unit 10 for compensating for the frequency characteristic of a signal to be recorded according to the output V 4 of the tape characteristic discriminating unit 8, and A tape type discrimination circuit of a recording and reproducing apparatus, characterized by comprising a signal recording section (11) for tape recording the output (V 3 ) of the frequency characteristic compensation section (10). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930003401A 1993-03-06 1993-03-06 Tape type discrimination method and recording circuit of recording and reproducing apparatus KR940022447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930003401A KR940022447A (en) 1993-03-06 1993-03-06 Tape type discrimination method and recording circuit of recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930003401A KR940022447A (en) 1993-03-06 1993-03-06 Tape type discrimination method and recording circuit of recording and reproducing apparatus

Publications (1)

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KR940022447A true KR940022447A (en) 1994-10-20

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KR1019930003401A KR940022447A (en) 1993-03-06 1993-03-06 Tape type discrimination method and recording circuit of recording and reproducing apparatus

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KR (1) KR940022447A (en)

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