KR970012525A - Disc Type Discrimination Device - Google Patents

Disc Type Discrimination Device Download PDF

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Publication number
KR970012525A
KR970012525A KR1019950028221A KR19950028221A KR970012525A KR 970012525 A KR970012525 A KR 970012525A KR 1019950028221 A KR1019950028221 A KR 1019950028221A KR 19950028221 A KR19950028221 A KR 19950028221A KR 970012525 A KR970012525 A KR 970012525A
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KR
South Korea
Prior art keywords
signal
comparator
focus
disc
comparing
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Application number
KR1019950028221A
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Korean (ko)
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KR0157563B1 (en
Inventor
마병인
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김광호
삼성전자 주식회사
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Priority to KR1019950028221A priority Critical patent/KR0157563B1/en
Publication of KR970012525A publication Critical patent/KR970012525A/en
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Publication of KR0157563B1 publication Critical patent/KR0157563B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter

Abstract

본 발명은 두께가 다른 CD와 고밀도의 광디스크 메모리를 하나의 광픽업장치로 재생할 수 있는 플레이어에서의 디스크종류판별장치에 관한 것이다. 본 발명의 장치는 포커스서치중에 광픽업장치에서 출력되는 고조파 아날로그(RF)신호를 입력받아 완충시켜 출력하는 버퍼와, 고주파성분의 노이즈를 제거하기 위해 로우패스필터링시키는 로우패스필터와, 노이즈 제거된 신호를 각기 다르게 설정한 기준레벨과 비교하는 복수개의 비교기와, 포커스에러(FE)신호를 기설정한 기준레벨과 비교하는 비교기와, 비교기의 비교 신호와 복수개의 비교기중 하나의 비교기의 비교신호를 논리곱연산하여 정확한 포커스제로크로스(FZC)신호를 검출하는 논리곱소자, 및 복수개의 비교기의 비교신호의 상태변화에 따라 디스크의 종류를 인식하여 디스크에 해당하는 플레이 동작을 시키고, 검출된 포커스제로크로스(FZC)신호를 이용하여 포커스 서보를 가동시키는 제어부로 구성된다. 따라서 본 발명은 포커스서치중에 디스크종류를 판별하므로 플레이 동작의 오류를 줄일 수 있는 효과를 제공한다.The present invention relates to a disc type discriminating device in a player capable of reproducing a CD having a different thickness and an optical disc memory having a high density with one optical pickup device. The apparatus of the present invention is a buffer for receiving and buffering a harmonic analog (RF) signal output from an optical pickup device during a focus search, a low pass filter for low pass filtering to remove high frequency components, and a noise removal A plurality of comparators for comparing the signals with reference levels set differently, a comparator for comparing the focus error (FE) signal with a preset reference level, a comparison signal of the comparator and one of the comparators Logical multiplication operation to detect the correct focus zero cross (FZC) signal, and to recognize the type of the disc in accordance with the change of the state of the comparison signal of the plurality of comparators and to play the play operation corresponding to the disc, the detected zero And a control unit for operating the focus servo using the cross FZC signal. Therefore, the present invention provides the effect of reducing the error of the play operation by determining the disc type during the focus search.

Description

디스크종류판별장치Disc Type Discrimination Device

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

제2도는 본 발명의 바람직한 실시예에 따른 디스크종류판별장치를 나타내는 구성도.2 is a block diagram showing a disk type discriminating apparatus according to a preferred embodiment of the present invention.

Claims (6)

두께가 다른복수의 디스크를 하나의 광픽업장치로 재생할 수 있는 플레이어의 턴 테이블에 탑재된 디스크의 종류를 판별하여 플레이동작을 수행하는 장치에 있어서, 입력되는 고조파 아날로그(RF)신호와 기설정한 제1기준신호를 비교하여 출력하는 제1비교기; 입력되는 고조파 아날로그(RF)신호와 기설정한 제2기준신호를 비교하여 출력하는 제2비교기; 입력되는 포커스에러(FE)신호와 기설정한 제3기준신호를 비교하여 포커스제로 크로스신호를 검출하는 제3비교기; 상기 제2비교기의 비교신호와 상기 제3비교기에서 검출한 포커스제로크로스신호를 논리곱연산하여 원하는 포커스제로크로스신호를 추출하여 출력하는 논리곱소자; 및 상기 제1비교기와 제2비교기로부터 인가되는 두 비교신호의 상태변화를 이용하여 디스크종류를 인식하여 해당하는 플레이동작을 시키고, 상기 논리곱소자로부터 인가되는 포커스제로크로스신호를 이용하여 포커스서보동작을 시키는 제어부를 포함하는 디스크종류판별장치.A device for determining a type of disc mounted on a turn table of a player that can reproduce a plurality of discs having different thicknesses with one optical pickup device, and performing a play operation. A first comparator for comparing and outputting a first reference signal; A second comparator comparing the input harmonic analog (RF) signal with a preset second reference signal and outputting the same; A third comparator for comparing the input focus error (FE) signal with a preset third reference signal and detecting a focus zero cross signal; A logical multiplication device for performing logical AND operation on the comparison signal of the second comparator and the focus zero cross signal detected by the third comparator to extract and output a desired focus zero cross signal; And a disc play operation by recognizing a disc type using a state change of two comparison signals applied from the first comparator and the second comparator, and a focus servo operation using a focus zero cross signal applied from the logical product. Disc type discrimination apparatus comprising a control unit for causing. 제1항에 있어서, 상기 입력되는 포커스에러(FE)신호와 고조파 아날로그(RF)신호는 포거스서치중에 얻어지며, 포커스에러(FE)신호는 1.2㎜ 두께의 광디스크의 경우 S자형 곡선으로 나타나고, 0.6㎜ 두께의 고밀도 광디스크메모리의 경우 S자형 곡선 이외에 미세한 파형이 포함되어 나타나는 것을 특징으로 하는 디스크종류판별장치.The method according to claim 1, wherein the input focus error (FE) signal and harmonic analog (RF) signal are obtained during a focus search, and the focus error (FE) signal is represented by an S-shaped curve in case of an optical disk having a thickness of 1.2 mm, In case of 0.6mm thick high density optical disk memory, disc type discrimination apparatus is characterized by including fine waveforms in addition to S-shaped curves. 제2항에 있어서, 상기 제1비교기는 고조파 아날로그신호의 미세한 레벨부분까지 검출하고, 상기 제2비교기는 고조파 아날로그신호의 미세한 레벨부분은 무시하고 정촛점내에서 얻어지는 레벨이 큰부분만을 검출하도록 상기 제2비교기의 제2기준신호가 제1비교기의 제1기준신호보다 큰 값으로 설정됨을 특징으로 하는 디스크종류판별장치.The method of claim 2, wherein the first comparator detects even the minute level portion of the harmonic analog signal, and the second comparator ignores the minute level portion of the harmonic analog signal and detects only a portion having a large level obtained within the focal point. And a second reference signal of the second comparator is set to a value larger than the first reference signal of the first comparator. 제1항에 있어서, 상기 제1비교기와 상기 제2비교기의 전단에는 입력되는 고조파 아날로그(RF)신호를 버퍼링하여 출력하는 버퍼가 연결됨을 특징으로 하는 디스크종류판별장치.The disk type discrimination apparatus according to claim 1, wherein a buffer for buffering and outputting an input harmonic analog (RF) signal is connected to a front end of the first comparator and the second comparator. 제4항에 있어서, 상기 버퍼는 버퍼링된 고조파 아날로그(RF)신호의 고주파성분의 노이즈를 제거하기 위해 고조파 아날로그(RF)신호를 로우패스필터링시키는 로우패스필터를 더 포함하는 것을 특징으로 하는 디스크종류판별장치.The disk type of claim 4, wherein the buffer further comprises a low pass filter configured to low pass filter the harmonic analog signal to remove noise of a high frequency component of the buffered harmonic analog signal. Discrimination device. 제4항에 있어서, 상기 버퍼는 연산증폭기를 사용한 전압 폴로워로 구성됨을 특징으로 하는 디스크종류판별장치.5. The disk type discrimination apparatus according to claim 4, wherein the buffer comprises a voltage follower using an operational amplifier. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950028221A 1995-08-31 1995-08-31 Disk discriminator KR0157563B1 (en)

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KR1019950028221A KR0157563B1 (en) 1995-08-31 1995-08-31 Disk discriminator

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990052633A (en) * 1997-12-23 1999-07-15 구자홍 Optical record carrier discrimination method
KR100272366B1 (en) * 1997-12-27 2000-11-15 구자홍 Method of disk distinction
KR100423143B1 (en) * 1998-11-19 2004-07-15 주식회사 대우일렉트로닉스 Disc discrimination method for CD and DVD disc players

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990038613A (en) * 1997-11-06 1999-06-05 윤종용 Optical Disc Discrimination Device and Method
KR100424488B1 (en) * 2002-01-15 2004-03-25 엘지전자 주식회사 Method for discriminating a type of an optical disc
KR100990101B1 (en) * 2003-10-16 2010-10-29 주식회사 히타치엘지 데이터 스토리지 코리아 Apparatus and method for cancelling a noise in focus error signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990052633A (en) * 1997-12-23 1999-07-15 구자홍 Optical record carrier discrimination method
KR100272366B1 (en) * 1997-12-27 2000-11-15 구자홍 Method of disk distinction
KR100423143B1 (en) * 1998-11-19 2004-07-15 주식회사 대우일렉트로닉스 Disc discrimination method for CD and DVD disc players

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KR0157563B1 (en) 1998-12-15

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