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1. (WO2010073450) SIGNAL PROCESSING CIRCUIT AND OPTICAL DISK REPRODUCER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/073450 International Application No.: PCT/JP2009/005442
Publication Date: 01.07.2010 International Filing Date: 19.10.2009
IPC:
G11B 7/085 (2006.01) ,G11B 7/004 (2006.01) ,G11B 7/09 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
08
Disposition or mounting of heads or light sources relatively to record carriers
085
with provision for moving the light beam into, or out of, its operative position.
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
04
using fluorescent or phosphorescent record carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
08
Disposition or mounting of heads or light sources relatively to record carriers
09
with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
Applicants:
パナソニック株式会社 PANASONIC CORPORATION [JP/JP]; 大阪府門真市大字門真1006番地 1006, Oaza Kadoma, Kadoma-shi, Osaka 5718501, JP (AllExceptUS)
菊本佳祐 KIKUMOTO, Keisuke; null (UsOnly)
織田剛 ODA, Takeshi; null (UsOnly)
岡佳典 OKA, Yoshinori; null (UsOnly)
Inventors:
菊本佳祐 KIKUMOTO, Keisuke; null
織田剛 ODA, Takeshi; null
岡佳典 OKA, Yoshinori; null
Agent:
新居広守 NII, Hiromori; 大阪府大阪市淀川区西中島5丁目3番10号タナカ・イトーピア新大阪ビル6階新居国際特許事務所内 c/o NII Patent Firm, 6F, Tanaka Ito Pia Shin-Osaka Bldg.,3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-city, Osaka 5320011, JP
Priority Data:
2008-33136425.12.2008JP
Title (EN) SIGNAL PROCESSING CIRCUIT AND OPTICAL DISK REPRODUCER
(FR) CIRCUIT DE TRAITEMENT DE SIGNAL ET LECTEUR DE DISQUE OPTIQUE
(JA) 信号処理回路および光ディスク再生装置
Abstract:
(EN) A signal processing circuit is provided with a tracking polarity determination section (101) for determining polarity at the time of executing tracking control regarding an optical disk comprised of a groove track and a land track, the groove track for recording data being formed with a wobble for indicating address information.  The tracking polarity determination section (101) is comprised of a binarized wobble signal generation unit (105) for generating a wobble signal corresponding to the shape of the wobble and generating a binarized wobble signal based on whether or not a value of the wobble signal exceeds a threshold value; a feature amount measuring unit (106) for measuring the feature amount of the binarized wobble signal generated by the binarized wobble signal generation unit (105); a discrimination unit (107) for discriminating whether or not the feature amount of the binarized wobble signal measured by the feature amount measuring unit (106) has a predetermined feature; and a polarity determination unit (108) for determining the polarity based on the result of discrimination by the discrimination unit (107).
(FR) L'invention porte sur un circuit de traitement de signal qui comporte une section de détermination de polarité de suivi (101) pour déterminer une polarité au moment de l'exécution d'une commande de suivi concernant un disque optique composé d'une piste de sillon et d'une piste intersillon, la piste de sillon pour enregistrer des données étant formée avec une vobulation pour indiquer des informations d'adresse. La section de détermination de polarité de suivi (101) est composée d'une unité de génération de signal de vobulation binarisé (105) pour générer un signal de vobulation correspondant à la forme de la vobulation et générer un signal de vobulation binarisé sur la base du fait qu'une valeur du signal de vobulation dépasse ou non une valeur seuil ; d'une unité de mesure de quantité caractéristique (106) pour mesurer la quantité caractéristique du signal de vobulation binarisé généré par l'unité de génération de signal de vobulation binarisé (105) ; d'une unité de discrimination (107) pour discriminer si la quantité caractéristique du signal de vobulation binarisé mesurée par l'unité de mesure de quantité caractéristique (106) possède ou non une caractéristique prédéterminée ; et une unité de détermination de polarité (108) pour déterminer la polarité sur la base du résultat de discrimination par l'unité de discrimination (107).
(JA)  本発明における信号処理回路は、グルーブトラックおよびランドトラックを有し、データが記録されるグルーブトラックにアドレス情報を表すウォブリングが形成されている光ディスクに対して、トラッキング制御を行う際の極性を決定するトラッキング極性決定部(101)を備え、トラッキング極性決定部(101)は、ウォブリングの形状に応じたウォブル信号を生成し、ウォブル信号の値が閾値を超えるか否かにより2値化ウォブル信号を生成する2値化ウォブル信号生成部(105)と、2値化ウォブル信号生成部(105)によって生成された2値化ウォブル信号の特徴量を測定する特徴量測定部(106)と、特徴量測定部(106)によって測定された2値化ウォブル信号の特徴量が、所定の特徴を有するか否かを判別する判別部(107)と、判別部(107)によって判別された結果によってその極性を決定する極性決定部(108)とを有する。
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
JPWO2010073450US20110242949CN102265340