TWI240258B - Method for detecting a wobble signal - Google Patents
Method for detecting a wobble signal Download PDFInfo
- Publication number
- TWI240258B TWI240258B TW092120932A TW92120932A TWI240258B TW I240258 B TWI240258 B TW I240258B TW 092120932 A TW092120932 A TW 092120932A TW 92120932 A TW92120932 A TW 92120932A TW I240258 B TWI240258 B TW I240258B
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- TW
- Taiwan
- Prior art keywords
- signal
- patent application
- wobble
- phase
- wobble frequency
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 6
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 241001494479 Pecora Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
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- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
- G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
- G11B2220/215—Recordable discs
- G11B2220/216—Rewritable discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2562—DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- G11B2220/2575—DVD-RAMs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/24—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
- G11B7/24073—Tracks
- G11B7/24082—Meandering
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
Description
1240258 五、發明説明(3) · 免任何混淆。此法較之先前技術之解決方案,可輸送較大 波幅和較少雜訊。所以,此解決方案之可靠性,對輸入信 號的信號對雜訊比依賴較低。 另外,進一步處理包括相位靈敏性整流。其優點是相 位靈敏性整流對於特殊目的,是充分確立的技術。 按照本發明,比較步驟又包括下列步驟,產生該處理 過合量信號和該處理過差異信號之進一步差異信號。產生 此進/步差異信號是將處理過合量信號和處理過差異信號 加以比較之最容易方式。進一步差異信號直接因輸入信號 内所含擺頻信號與參致信號間的相對相位而定。 比較步驟宜進一步包括將該進一步差異信號,或該處 理過合量信號和該處理過差異信號,經單一擺頻期間之積 合梦驟。藉經單一擺頻周期的積合,積合值與輪入信號的 波幅裏比例。如此亦可容易獲得擺頻信號之信號波幅。輸 出信號的符號表示輸入信號的相位。由於輸出信號對輸入 信號波幅之比例,輸出信號亦可用來控制輸入信號的波 幅。 、 本發明方法宜再包括參玫信號計算步驟。使用擺頻週 期内的相位作為輸入參變數,即可容易計算參 資訊由鎖入擺頻佗號内的PLL (相位鎖定迴路)可撂。盔 算正弦或餘弦參玫信號,可用c〇RDIC演算。 " 另外,本發明方法又包括參玫信號在查 驟。 樣0
如果PLL以數位實現,已知可在信號内-何處表内儲羊 相對應參致值可儲存於查索表内。 處對^號 右擺頻信5
1240258 五、發明說明(4) ‘ 擺頻週期内取樣3 2次,則查索表即含有3 2次鍵入。 按照本發明又一要旨,擺頻信號之檢測方法包括對具 有不同擺頻頻率的複數參玫信號,並行進行本發明方法。 以高密度光碟而言,資訊最好使用複數不同擺頻頻率,尤 其是三種不同擺頻頻率,編碼入擺頻信號内。以此等頻率 各平行進行本發明方法,得以可靠檢測所編碼資訊。 記錄媒體讀/寫裝置宜包括進行本發明方法用之機構 。此種裝置在檢測擺頻信號方面非常可靠。即使在光學記 錄媒體的記錄面積内,可安全恢復位址資訊。 實施方式 為更佳瞭解本發明起見,在如下參見附圖說明有益造 型中特定具體例。須知本發明不限於此等具體例,而特定 之特點可權宜組合和/或修飾,不違本發明之範圍。 DVD + RW碟片之軌道擺頻,基本上為單調正弦波。只有 少部份執道擺頻是相調,並含有位址位元、輔助資料位元 和同位位元。此部份在預溝(ADIP)内稱為位址。第1圖表 示此ADIP部份跨越三個擺頻週期P1,P2,P3之擺頻信號WS。 由圖可見,在第二擺頻週期P2内的擺頻信號WS被反相,並 構成負擺頻。正、負擺頻的順序用來把資訊編碼於ADIP内 。為將此資訊解碼,必須確實檢測正、負擺頻。 第2圖表示本發明方法之方塊圖。輸入信號IS與參玫 信號RS比較,後者是由參玫信號發生器8所產生,其相位 和頻率相當於所需擺頻信號。為此目的,加器1把輸入信 號IS和參玫信號RS相加,以產生合量信號S1。加器2把輸 i^aii hi 第8頁 1240258 五、發明說明(5) * 入信號IS和負參玫信號RS相加,得相差信號S2。視輸入信 號I S和參玫信號RS間之相對相位,二信號s 1,S2之一有較 大值,而另一信號S2,S1有較小值。若輸入信號! s的相位 與參玫信號RS —致,或信號I S,RS間之相位為π的整數倍 ,則此效果最明顯。鎖定於擺頻信號W S的二絕對值計算器 3,4 ’分別計算合量信號S1的絕對值信號a 1,以及相差信 號S 2的絕對值信號A 2。又一加器5把合量信號s 1的絕對值 #號A1和相差彳§號S 2的負絕對值信號a 2相加,產生進一步 相差信號DS。此進一步相差信號DS利用積合器6在擺頻週 期内積合,得輸出信號0S。積合後,輸出信號值視輸入信 號I S内所含擺頻信號WS的波幅和相位而定。 第3圖表示本發明又一具體例之方塊圖。代替進一步 相差信號DS之積合,二積合器6, 7分別用來積合合量信號 S1的絕對值信號A1以及相差信號s 2的絕對值信號A 2。以此 方式,可得二積合信號II和12,形成輸出信號0S之基礎。 輸出信號0S是利用加器5把第一積合信號II和負第二積合 信號I 2相加而產生。 第4圖表示光學記錄媒體14讀/寫裝置。此裝置包括 進行本發明方法用之機構18b,以獲得輸出信號0S,可將 光學記錄媒體14的擺頻軌道16内所含資訊解碼。從光源1〇 射出的掃描光束2 0利用準直儀11準直,並利用光束分裂器 12轉向。物鏡13把掃描光束20聚焦在帶有資訊的光學記錄 媒體14之一層15的擺頻軌道16上。從帶有資訊之層15反射 的掃描光束20,利用物鏡13準直,利用造象單位17在光檢
第9頁 1240258 五、發明說明(6) ^ 波器9上造象。來自光檢波器9的信號以評鑑單位1 8評鑑。 評鑑單位包括追蹤誤差信號TE發生機構18a,該信號供至 追蹤調整器19,確保掃描光束20盡量接近擺頻執道16的執 道中心運動。評鑑單位又包括機構1 8b,供檢測擺頻信號 WS並產生輸出信號OS,為擺頻信號WS内所含資訊解碼所 需0 第10頁
Claims (1)
1240258 六、申巧專利範圍 1 · 一種擺頻信號之檢測方法,其 驟: 特徵為, 包括 (RS,;包括擺頻信號(^)的輸入信號(1 加以比較,參玫信號(RS)的相位 與參玟信 擺頻信號;以;5 頻率相當於所 下步 位者 把輸出信號(0S)輸出,以指示擺頻信號 f虎 所需 之波幅和相 •如申喷專利範圍第1項之方法,其中比較步驟包括·· 產生輪入信號(IS)和參玫信號(RS)之合量信號(S1) 和差異信號(S2)者。 3·如申請專利範圍第2項之方法,其中比較步驟又包 括: 進一步處理該合量信號(S1)和該相差信號(S2)者。 4·如申請專利範圍第3項之方法,其中進一步處理包 括絕對值計算和相位靈敏性整流之一者。 5 ·如申請專利範圍第3項之方法,其中比較步驟又包 括產生該處理過合量信號(S1)和該處理過差異信號(S2)之 進一步差異信號(DS)者。
6·如申請專利範圍第3項之方法,其中比較步驟又包 括把該進一步不同信號(DS),或該進一步處理過合量信號 (A1)及該進一步處理過差異信號(A2),在擺頻週期加以積 合者。 7 ·如申請專利範圍第1項之方法,又包括步驟為: 計算參致信號(R S )者。
第12頁 1240258 六、申請專利範圍 8. 如申請專利範圍第1項之方法,又包括步驟為: 把參玫信號(RS)儲存於表内者。 9. 一種擺頻信號之檢測方法,其特徵為,包括對具有 不同擺頻頻率之複數參政信號(RS ),並行進行申請專利範 圍第1項之方法者。 1 0. —種記錄媒體之讀/寫裝置,其特徵為,包括機 構以進行申請專利範圍第1項之方法者。
第13頁
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02017521A EP1388850A1 (en) | 2002-08-06 | 2002-08-06 | Method for detecting a wobble signal |
Publications (2)
Publication Number | Publication Date |
---|---|
TW200402701A TW200402701A (en) | 2004-02-16 |
TWI240258B true TWI240258B (en) | 2005-09-21 |
Family
ID=30129187
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW092120932A TWI240258B (en) | 2002-08-06 | 2003-07-31 | Method for detecting a wobble signal |
Country Status (7)
Country | Link |
---|---|
US (1) | US20040027956A1 (zh) |
EP (1) | EP1388850A1 (zh) |
JP (1) | JP2004134054A (zh) |
KR (1) | KR20040014203A (zh) |
CN (1) | CN100346398C (zh) |
DE (1) | DE60302949T2 (zh) |
TW (1) | TWI240258B (zh) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100685397B1 (ko) * | 2004-08-09 | 2007-02-22 | 삼성에스디아이 주식회사 | 평판 표시 소자 및 그 제조방법 |
EP1742221A1 (en) * | 2005-06-28 | 2007-01-10 | Deutsche Thomson-Brandt Gmbh | Method and circuit for evaluating a wobble signal |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4958737A (zh) * | 1972-10-04 | 1974-06-07 | ||
NL8103117A (nl) * | 1981-06-29 | 1983-01-17 | Philips Nv | Inrichting voor het beschrijven en/of uitlezen van een registratiedrager. |
NL8800152A (nl) * | 1988-01-22 | 1989-08-16 | Philips Nv | Optische uitleesbare registratiedrager van het beschrijfbare type, een inrichting voor het vervaardigen van een dergelijke registratiedrager, en inrichtingen voor het optekenen en/of uitlezen van informatie op/uit een dergelijke registratiedrager. |
KR950010418B1 (ko) * | 1991-08-28 | 1995-09-16 | 미쯔비시덴끼 가부시끼가이샤 | 광기록재생장치 |
KR100230232B1 (ko) * | 1994-06-30 | 1999-11-15 | 윤종용 | 다중 이용자를 위한 광디스크 기록재생장치 |
US5506824A (en) * | 1994-12-20 | 1996-04-09 | Eastman Kodak Company | Frequency modulation to biphase data conversion for writable CD ATIP data |
JPH1069646A (ja) * | 1996-08-29 | 1998-03-10 | Ricoh Co Ltd | 光ディスク媒体、光ディスク装置 |
US6385257B1 (en) * | 1997-01-21 | 2002-05-07 | Sony Corporation | Frequency demodulating circuit, optical disk apparatus thereof and preformating device |
JP3915163B2 (ja) * | 1997-03-18 | 2007-05-16 | ソニー株式会社 | ディジタル信号再生回路 |
US6172952B1 (en) * | 1997-06-11 | 2001-01-09 | Matsushita Electric Industrial Co., Ltd. | Optical disk device with abnormal jump detection |
JPH1173645A (ja) * | 1997-08-28 | 1999-03-16 | Mitsubishi Electric Corp | 光ディスク装置 |
JP4653315B2 (ja) * | 1999-01-25 | 2011-03-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 記録担体及び記録担体を走査するための装置 |
US6345018B1 (en) * | 1999-08-04 | 2002-02-05 | Ricoh Company, Ltd. | Demodulation circuit for demodulating wobbling signal |
EP1098301A2 (en) * | 1999-11-03 | 2001-05-09 | Samsung Electronics Co., Ltd. | Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium |
JP2003517171A (ja) * | 1999-12-15 | 2003-05-20 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光学記録担体及び走査装置 |
JP2002279640A (ja) * | 2001-03-21 | 2002-09-27 | Ricoh Co Ltd | ウォブル検出回路とその装置 |
-
2002
- 2002-08-06 EP EP02017521A patent/EP1388850A1/en not_active Withdrawn
-
2003
- 2003-07-18 KR KR1020030049195A patent/KR20040014203A/ko not_active Application Discontinuation
- 2003-07-22 US US10/625,002 patent/US20040027956A1/en not_active Abandoned
- 2003-07-25 DE DE60302949T patent/DE60302949T2/de not_active Expired - Fee Related
- 2003-07-31 JP JP2003283647A patent/JP2004134054A/ja active Pending
- 2003-07-31 TW TW092120932A patent/TWI240258B/zh not_active IP Right Cessation
- 2003-08-06 CN CNB031275389A patent/CN100346398C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2004134054A (ja) | 2004-04-30 |
DE60302949D1 (de) | 2006-02-02 |
EP1388850A1 (en) | 2004-02-11 |
US20040027956A1 (en) | 2004-02-12 |
KR20040014203A (ko) | 2004-02-14 |
CN1487508A (zh) | 2004-04-07 |
TW200402701A (en) | 2004-02-16 |
DE60302949T2 (de) | 2006-07-27 |
CN100346398C (zh) | 2007-10-31 |
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MM4A | Annulment or lapse of patent due to non-payment of fees |