JPH0289616U - - Google Patents
Info
- Publication number
- JPH0289616U JPH0289616U JP16814188U JP16814188U JPH0289616U JP H0289616 U JPH0289616 U JP H0289616U JP 16814188 U JP16814188 U JP 16814188U JP 16814188 U JP16814188 U JP 16814188U JP H0289616 U JPH0289616 U JP H0289616U
- Authority
- JP
- Japan
- Prior art keywords
- track cross
- peak level
- obtaining
- ratio
- optical disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図はその要部を示すブロツク図、第３図はそ
の動作を示す各部波形図である。
２１…デイスク検出器、２２…エンベロープ検
出器、２３…ピーク検出器、２４…コンパレータ
、２５…比較回路、２６…演算回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing the main parts thereof, and FIG. 3 is a waveform diagram of each part showing its operation. 21... Disk detector, 22... Envelope detector, 23... Peak detector, 24... Comparator, 25... Comparison circuit, 26... Arithmetic circuit.
Claims (1)
る光デイスク装置において、トラツククロス信号
を得る手段と、該トラツククロス信号をエンベロ
ープ検波してピークレベル期間を検出する手段と
、上記トラツククロス信号の平均値を得る手段と
、上記ピークレベル期間において上記平均値が所
定レベル以上となる回数を計数する手段と、該計
数結果の上記ピークレベル発生回数に対する比率
を演算する手段とを有し、該比率によりデイスク
の種類を判別することを特徴とする光デイスク装
置。 An optical disk device for recording or reproducing information by irradiating light onto a disk, comprising means for obtaining a track cross signal, means for detecting an envelope of the track cross signal to detect a peak level period, and an average of the track cross signals. means for obtaining a value, means for counting the number of times the average value is equal to or higher than a predetermined level during the peak level period, and means for calculating a ratio of the counting result to the number of times the peak level occurs, and according to the ratio. An optical disk device characterized by determining the type of disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16814188U JPH0548254Y2 (en) | 1988-12-26 | 1988-12-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16814188U JPH0548254Y2 (en) | 1988-12-26 | 1988-12-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0289616U true JPH0289616U (en) | 1990-07-16 |
| JPH0548254Y2 JPH0548254Y2 (en) | 1993-12-22 |
Family
ID=31457063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16814188U Expired - Lifetime JPH0548254Y2 (en) | 1988-12-26 | 1988-12-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0548254Y2 (en) |
-
1988
- 1988-12-26 JP JP16814188U patent/JPH0548254Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548254Y2 (en) | 1993-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |