摘要:
Provided is an optical recording medium driving apparatus including a light radiating unit that radiates light to an optical recording medium, a light receiving unit that receives reflection light from the optical recording medium, in which four regions including a first region, a second region, a third region, and a fourth region are formed by being divided by a linear direction division line and a tracking direction division line, a first binarizing unit that obtains binarization signals, a first exclusive OR calculating unit, a second exclusive OR calculating unit, and an operation unit. The first and second exclusive OR calculating units and the operation unit operate in a state not synchronized with a channel clock.
摘要:
As for a quadruple light receiving unit, in a case where divided regions of A to D as in a DPD scheme is defined, when binarization signals of light reception signals in regions A to D are set as signals A to D, exclusive OR between the signal A without delay and the signal B with delay, exclusive OR between the signal A with delay and the signal C without delay, exclusive OR between the signal B without delay and the signal D with delay, and exclusive OR between the signal B with delay and the signal D without delay are calculated, and a tracking error signal is obtained on the basis of the calculation of ( + )−( + ). Thus, the above problem can be solved.
摘要:
[Object] To reduce power consumption even more.[Solution] Provided is a communication control device including a communication necessity information acquisition unit configured to acquire communication necessity information indicating necessity to communicate with an external device, and a drive control unit configured to control drive of a first communication unit and a second communication unit on a basis of the acquired communication necessity information, the first communication unit communicating with the external device using a first communication mode, the second communication unit communicating with the external device using a second communication mode capable of transferring data at a rate higher than the first communication mode. The drive control unit controls a drive state of each of the first communication unit and the second communication unit to be set to one of an active state capable of communicating with the external device, a power-saving state having lower power consumption than the active state, and an inactive state being a power off state.
摘要:
A cross section of a luminous flux of returning light from a disc is split into a plurality of regions, and an operation is performed so that a weighting of a light amount of a region which has favorable symmetry in a radial direction and is formed on a circumference of an ellipse among the split regions is increased. Further, a lens shift detection signal is formed, and a lens shift detection signal is canceled from a push-pull signal.
摘要:
An information recording medium includes a plurality of wobbled tracks, in which a phase mismatch range of an adjacent wobble is a portion of a range of one track.
摘要:
A cross section of a luminous flux of returning light from a disc is split into a plurality of regions, and an operation is performed so that a weighting of a light amount of a region which has favorable symmetry in a radial direction and is formed on a circumference of an ellipse among the split regions is increased. Further, a lens shift detection signal is formed, and a lens shift detection signal is canceled from a push-pull signal.
摘要:
As for a quadruple light receiving unit, in a case where divided regions of A to D as in a DPD scheme is defined, when binarization signals of light reception signals in regions A to D are set as signals A to D, exclusive OR between the signal A without delay and the signal B with delay, exclusive OR between the signal A with delay and the signal C without delay, exclusive OR between the signal B without delay and the signal D with delay, and exclusive OR between the signal B with delay and the signal D without delay are calculated, and a tracking error signal is obtained on the basis of the calculation of ( + )−( + ). Thus, the above problem can be solved.
摘要:
A control device includes: a delay unit configured to delay a signal for use in exposure of a master disc; and a control unit configured to adjust an amount of delay of the signal so that an exposure pattern that satisfies an information recording medium format is formed on a master disc rotated by a constant linear velocity (CLV) system.
摘要:
A control device includes: a delay unit configured to delay a signal for use in exposure of a master disc; and a control unit configured to adjust an amount of delay of the signal so that an exposure pattern that satisfies an information recording medium format is formed on a master disc rotated by a constant linear velocity (CLV) system.
摘要:
Provided is a CAV or a zone CAV. A groove which continuously wobbles is preliminary formed and information is recorded in the groove and a land adjacent to the groove, the groove has a first wobble part which is modulated by groove address information, a second wobble part which is modulated by address information of one adjacent land, and a third wobble part which is modulated by address information of the other adjacent land, a first section sandwiched between the second wobble parts of adjacent two grooves and a second section sandwiched between the third wobble parts of the adjacent two grooves are formed on the land, and one of phases of wobbles on both sides of the first section and phases of wobbles on both sides of the second section are substantially in-phase.