KR970002925A - Recording Density Discrimination Device for Optical Discs - Google Patents
Recording Density Discrimination Device for Optical Discs Download PDFInfo
- Publication number
- KR970002925A KR970002925A KR1019950016643A KR19950016643A KR970002925A KR 970002925 A KR970002925 A KR 970002925A KR 1019950016643 A KR1019950016643 A KR 1019950016643A KR 19950016643 A KR19950016643 A KR 19950016643A KR 970002925 A KR970002925 A KR 970002925A
- Authority
- KR
- South Korea
- Prior art keywords
- density
- signal
- recording density
- focus
- disc
- Prior art date
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Abstract
본 발명은 고밀도 CD재생장치에서 장착된 디스크가 저밀도 CD인지 고밀도 CD인지를 판별할 수 있도록 한 광디스크의 기록밀도판별장치에 관한 것으로, 일반적인 CD재생장치에서는 디스크의 기록밀도를 판별할 수 없어 각 기록밀도에 따른 재생조건을 만족시킬 수 없어 최적의 재생상태를 유지할 수 없었던 점을 감안하여 본 발명은 대물렌즈의 촛점이 디스크의 기록면에 정확히 집광된 위치에서 포커싱 오차신호를 검출하고 RF신호 정형부에서 RF신호를 정형후 이를 레벨 비교부에서 설정되어 있는 기준레벨과 비교하여 그 비교결과에 따라 마이컴에서 현재 장착된 디스크의 기록밀도를 판별할 수 있도록 함으로써 현재 장착된 디스크가 고밀도 CD인지 저밀도 CD인지를 정확히 판별할 수 있게 되어 고밀도 CD 및 저밀도 CD에 대해 최적의 재생상태를 유지할 수 있도록 한 것이다.The present invention relates to an optical disc recording density discrimination apparatus capable of discriminating whether a disc mounted in a high density CD reproducing apparatus is a low density CD or a high density CD. In view of the fact that the reproducing condition according to the density could not be satisfied, the present invention could not maintain an optimal reproducing state. In the present invention, a focusing error signal is detected at a position where the focus of the objective lens is exactly focused on the recording surface of the disc. After shaping the RF signal, it is compared with the reference level set by the level comparator and the microcomputer can determine the recording density of the currently loaded disc according to the comparison result. Accurate discrimination ensures optimal playback of high and low density CDs It will have to make.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 일반적인 CD재생장치의 포커스 서보회로의 블럭 구성도, 제2도 (가)는 제1도에서 포커스 렌즈 인입 동작시의 포커스 구동신호 파형도, (나)는 제1도의 포커스 오차신호 검출부의 출력신호파형도, 제3도는 본 발명에 따른 광디스크의 기록밀도판별장치의 블럭 구성도.FIG. 1 is a block diagram of a focus servo circuit of a typical CD player, FIG. 2A is a waveform diagram of a focus drive signal during a focus lens insertion operation in FIG. 1, and B is a focus error signal detector of FIG. Fig. 3 is a block diagram of the recording density discrimination apparatus of the optical disc according to the present invention.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950016643A KR970002925A (en) | 1995-06-21 | 1995-06-21 | Recording Density Discrimination Device for Optical Discs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950016643A KR970002925A (en) | 1995-06-21 | 1995-06-21 | Recording Density Discrimination Device for Optical Discs |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970002925A true KR970002925A (en) | 1997-01-28 |
Family
ID=66524110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950016643A KR970002925A (en) | 1995-06-21 | 1995-06-21 | Recording Density Discrimination Device for Optical Discs |
Country Status (1)
Country | Link |
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KR (1) | KR970002925A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990000749A (en) * | 1997-06-10 | 1999-01-15 | 김영환 | CD / DVD Discrimination Device Using Focusing Error |
KR100288977B1 (en) * | 1997-12-30 | 2001-05-02 | 윤종용 | Optical disc discriminating device |
-
1995
- 1995-06-21 KR KR1019950016643A patent/KR970002925A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19990000749A (en) * | 1997-06-10 | 1999-01-15 | 김영환 | CD / DVD Discrimination Device Using Focusing Error |
KR100288977B1 (en) * | 1997-12-30 | 2001-05-02 | 윤종용 | Optical disc discriminating device |
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