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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasato Nagasawa, Kouichi Komawaki, Yoshinobu Ishida, Tsuyoshi Katayama
Estimating the term…
In an optical disk device using an optical disk of a single land/groove spiral configuration, headers dividing each track revolution into sectors have one or more mirror surface parts, and the disposition and/or length of the mirror surface parts is different between sectors at a connecting point and sectors which are not at a connecting point. The device includes a circuit for detecting a connecting point based on the position and/or length of the mirror surface part. The device is further provided with a circuit for predicting the connecting point, thereby making up for any failure of detection by the detecting circuit. Such a predicting circuit may have a circuit for predicting the connecting point based on the phase of the disk motor when a connecting point is previously detected, or alternatively a circuit for predicting the connecting point by counting the number of PLL clocks, from a sector preceding the sector which is at a connecting point.
An optical disk device using an optical disk having a continuous information track formed of alternating land and groove revolutions, each land revolution being connected at a connecting point with a groove revolution, each revolution being divided into sectors by headers, each header having a mirror surface region, the disposition and/or length of the mirror surface region indicating whether the sector is at a connecting point between land and groove revolutions, said device comprising:
An optical disk device using an optical disk having a continuous information track formed of alternating land and groove revolutions, each land revolution being connected at a connecting point with a groove revolution, each revolution being divided into sectors by headers, each header having a mirror surface region, said device comprising:
An optical disk device using an optical disk having a continuous information track formed of alternating land and groove revolutions, each land revolution being connected with a groove revolution at a connecting point, each revolution being divided into sectors by headers, each header having a mirror surface region, said optical disk device comprising:
An optical disk comprising:
An optical disk device using an optical disk having a continuous information track formed of alternating land and groove revolutions, each land revolution being connected with a groove revolution at a connecting point, each revolution being divided into sectors by headers, pit sequences in the headers being shifted in the radial direction to form wobble pits, an order of the directions of the shifting of the pit sequences as they are scanned by a light spot being changed at a connecting point, said device comprising:
Dependencies are inferred from the claim text.