KR950001661A - Standard / Long Time Mode Discrimination Circuit and Method - Google Patents

Standard / Long Time Mode Discrimination Circuit and Method Download PDF

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Publication number
KR950001661A
KR950001661A KR1019930010890A KR930010890A KR950001661A KR 950001661 A KR950001661 A KR 950001661A KR 1019930010890 A KR1019930010890 A KR 1019930010890A KR 930010890 A KR930010890 A KR 930010890A KR 950001661 A KR950001661 A KR 950001661A
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South Korea
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channel
mode
signal
speed mode
double speed
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KR1019930010890A
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Korean (ko)
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KR0126805B1 (en
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윤수원
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김광호
삼성전자 주식회사
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing

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  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

본 발명은 SP/LP모드 판별회로 및 그 방법이 개시되어 있다.The present invention discloses an SP / LP mode discrimination circuit and a method thereof.

본 발명은 배속모드에서 채널별로 재생되는 신호 중 소정대역이내의 파일롯트신호만을 검출하는 저역통과필터, 미리 설정된 샘플링 포인트에서 저역통과필터를 통해 픽업된 파일롯트신호와 기준파일롯트신호와의 오차신호를 출력하는 ATF제어부, 채널별 기준파일롯트신호를 선택할 수 있는 선택신호를 ATF제어부에 출력하며, 자동 트랙 탐색신호의 오차신호의 레벨에 따라 SP/LP모드인지를 판별하여 그 결과를 출력하는 마이콤, 마이콤으로부터 출력되는 SP/LP모드 판별신호에 적응하여기록매체의 주행속도를 제어하는 서보부를 포함하여 2배속 재생시 ATF 오차신호를 이용하여 현재 2배속으로 재생하고 있는 테이프가 SP로 녹화된 부분인지 LP로 녹화된 부분인지를 용이하게 판별할 수 있다.According to the present invention, a low pass filter detecting only a pilot signal within a predetermined band among signals reproduced for each channel in a double speed mode, and an error signal between a pilot signal picked up through a low pass filter at a predetermined sampling point and a reference pilot signal The ATF control unit outputs a signal to the ATF control unit, and selects a reference pilot signal for each channel, and determines whether it is in the SP / LP mode according to the error signal level of the automatic track search signal and outputs the result. In this case, the tape that is currently playing at double speed using the ATF error signal during double speed playback, including the servo unit that controls the running speed of the recording medium in response to the SP / LP mode discrimination signal output from the microcomputer It is possible to easily determine whether or not the portion recorded with the LP.

Description

표준/장시간모드 판별회로 및 그 방법Standard / Long Time Mode Discrimination Circuit and Method

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

제 4도는 본 발명에 의한 SP/LP모드 판별회로의 일 실시예에 따른 회로도.4 is a circuit diagram according to an embodiment of the SP / LP mode discrimination circuit according to the present invention.

Claims (9)

오디오신호, 비디오신호, 트랙을 판별하는 파일롯트신호를 각각 미리 정해진 주파수대역으로 기록된 기록매체로부터 이를 재생하는 8㎜ 영상기기에 있어서 ; 배속모드에서 채널별로 재생되는 신호 중 소정대역이내의 파일롯트신호만을 검출하는 필터수단; 미리 설정된 샘플링 포인트에서 상기 필터수단을 통해 픽업된 파일롯트신호와 기준파일롯트신호와의 오차신호를 출력하는 자동 트랙 탐색(ATF) 제어수단; 채널별 기준파일롯트신호를 선택할 수 있는 선택신호를 상기 ATF제어부에 출력하며, 상기 자동 트랙 탐색신호의 오차신호의 레벨에 따라 SP/LP모드인지를 판별하여 그 결과를 출력하는 제어수단; 및 상기 제어수단으로부터 출력되는 SP/LP모드 판별신호에 적응하여 기록매체의 주행속도를 제어하는 서보수단을 포함함을 특징으로 하는 SP/LP모드 판별회로.An 8 mm video apparatus for reproducing an audio signal, a video signal, and a pilot signal for discriminating a track from a recording medium recorded in a predetermined frequency band, respectively; Filter means for detecting only a pilot signal within a predetermined band of signals reproduced for each channel in the double speed mode; Automatic track search (ATF) control means for outputting an error signal between a pilot signal and a reference pilot signal picked up by the filter means at a preset sampling point; Control means for outputting a selection signal for selecting a reference pilot signal for each channel to the ATF control unit, and determining whether it is in the SP / LP mode according to the error signal level of the automatic track search signal and outputting the result; And servo means for controlling the traveling speed of the recording medium in response to the SP / LP mode discrimination signal output from the control means. 제 1항에 있어서, 상기 배속모드는 2배속모드임을 특징으로 하는 SP/LP모드 판별회로.2. The SP / LP mode discrimination circuit according to claim 1, wherein the double speed mode is a double speed mode. 제 1항에 있어서, 상기 미리 설정된 샘플링 포인트는 채널의 중간지점임을 특징으로 하는 SP/LP모드 판별회로.The SP / LP mode discrimination circuit of claim 1, wherein the preset sampling point is a midpoint of a channel. 제 1항에 있어서, 상기 제어수단은 상기자동 트랙 탐색 오차신호의 레벨값이 각 채널의 샘플링 포인트에서모두 동일한 레벨을 나타내면 SP 2배속을 SP로 기록된 부분에서 재생할 경우, 또는 LP 2배속으로 LP로 기록된 부분에서재생할 경우로 인식하여 정상 2배속모드를 수행하도록 상기 서보수단을 제어함을 특징으로 하는 SP/LP모드 판별회로.2. The control means according to claim 1, wherein the control means reproduces the SP double speed at a portion recorded as SP or LP at double LP speed if the level value of the automatic track search error signal indicates the same level at each sampling point of each channel. SP / LP mode discrimination circuit, characterized in that the servo means is controlled to perform the normal double speed mode by recognizing the case of reproducing in the recorded portion. 제 1항에 있어서, 상기 제어수단은 상기 자동 트랙 탐색 오차신호의 레벨값이 채널의 샘플링 포인트의 어느 한 지점에서 “0”레벨을, 다른 한 지점에서는 “1”레벨과 “-1”레벨을 번갈아 가지면 LP 2배속모드에서 SP로 기록된 부분을 재생할 경우임을 인식하여 상기 서보수단을 제어하여 정상 SP 2배속모드를 수행함을 특징으로 하는 SP/LP모드 판별회로.2. The control unit according to claim 1, wherein the control means sets the level value of the automatic track search error signal to the level "0" at one point of the sampling point of the channel, and the level "1" and "-1" at another point. Alternately recognizing the case of reproducing the portion recorded with the SP in the LP double speed mode and controlling the servo means to perform the normal SP double speed mode. 제 1항에 있어서, 상기 제어수단은 상기 자동 트랙 탐색 오차신호의 레벨값이 채널의 샘플링 포인트의 어느 한 지점에서“ -1”레벨을 다른 한 지점에서 “1”레벨을 가지면 SP 2배속모드에서 LP로 기록된 부분임을 판단하여 정상 LP 2배속모드를 수행하도록 상기서보수단을 제어함을 특징으로 하는 SP/LP모드 판별회로.The method of claim 1, wherein the control means in the SP double speed mode if the level value of the automatic track search error signal has a "-1" level at one point of a sampling point of a channel and a "1" level at another point. SP / LP mode discrimination circuit, characterized in that for controlling the servo means to perform the normal LP double speed mode by judging that the portion recorded in LP. 8㎜ 영상기기에 있어서 : 각 채널별 기준파일롯트신호를 선택하는 기준파일롯트신호 선택단계; 각 채널의소정 포인트에서 자동 트랙 탐색신호를 샘플링하는 샘플링단계; 각 채널의 자동 트랙 탐색 오차신호가 동일한 레벨을 가지면 정상 배속모드를 수행하는 정상 배속모드 수행단계; 상기 정상 배속모드 수행단계에서 각 채널의 자동 트랙 탐색 오차신호가 동일한 레벨을 가지지 않으면 자동 탐색 오차신호의 레벨이 어느 한 채널에서 교번적으로 서로 다른 레벨을 가지면 SP모드로 인식하여 SP 배속모드를 수행하는 SP 배속모드 수행단계; 및 상기 정상 배속모드 수행단계에서 각 채널의자동 트랙 탐색 오차신호가 동일한 레벨을 가지지 않으면 상기 자동 탐색 오차신호의 레벨이 각 채널별 서로 다른 레벨을가지면 LP 배속모드로 인식하여 LP 배속모드를 수행하는 LP 배속모드 수행단계를 포함함을 특징으로 하는 SP/LP모드 판별방법.An 8mm imaging apparatus comprising: a reference pilot signal selecting step of selecting a reference pilot signal for each channel; A sampling step of sampling an automatic track search signal at a predetermined point of each channel; Performing a normal speed mode when the automatic track search error signal of each channel has the same level; In the normal speed mode performing step, if the auto track search error signal of each channel does not have the same level, if the level of the auto search error signal has different levels alternately in any one channel, the SP mode is recognized by performing the SP mode. Performing the SP double speed mode; And in the normal speed mode performing step, if the automatic track search error signal of each channel does not have the same level, if the level of the automatic search error signal has a different level for each channel, the LP speed mode is performed by performing the LP speed mode. SP / LP mode discrimination method comprising the step of performing the LP double speed mode. 제 7 항에 있어서, 상기 배속모드는 2배속모드임을 특징으로 하는 SP/LP모드 판별방법.8. The SP / LP mode discrimination method according to claim 7, wherein the double speed mode is a double speed mode. 제 7 항에 있어서, 상기 샘플링단계에서 각 채널의 미리 설정된 샘플링 포인트는 채널의 중간지점임을 특징으로 하는 SP/LP모드 판별방법.8. The method of claim 7, wherein the predetermined sampling point of each channel in the sampling step is a midpoint of the channel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930010890A 1993-06-15 1993-06-15 Apparatus and method for mode detecting for recording speed in video cassette recorder KR0126805B1 (en)

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KR1019930010890A KR0126805B1 (en) 1993-06-15 1993-06-15 Apparatus and method for mode detecting for recording speed in video cassette recorder

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KR1019930010890A KR0126805B1 (en) 1993-06-15 1993-06-15 Apparatus and method for mode detecting for recording speed in video cassette recorder

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KR950001661A true KR950001661A (en) 1995-01-03
KR0126805B1 KR0126805B1 (en) 1998-04-01

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