摘要:
An optical disk apparatus for reproducing or recording and reproducing two or more sorts of optical disks whose recording plane heights are different is arranged to reproduce or record data from or on the optical disk transparently to the user and without the users intricate operations. For this purpose, the optical disk apparatus provides a disk discriminating circuit for discriminating the disks whose recording plane heights are different. The disk discriminating circuit operates to discriminate the disk before reproducing or recording the disk mounted to the optical disk apparatus and switch the optical system and the circuit system to the suitable ones to the discriminated disk and then reproduce or record the data from or on the disk.
摘要:
An optical disc apparatus for recording information and/or reproducing on an optical disc which has at least two recording layers including layer 0 and layer 1 reproducible from one side of the disc. The apparatus includes an optical pickup having a laser source, an objective lens, and an actuator. A controller is provided which obtains a present layer information of a sector recording layer from light reflected from the disc, confirms a target layer information of a target recording layer, judges whether the present layer information is the same as the target layer information, and outputs a first control signal to the actuator when it is judged that the present layer information is layer 0 and the target layer information is layer 1, and outputs a second control signal to a slider.
摘要:
A method and apparatus for reproducing data from an optical disc which has a plurality of recording layers reproducible from one side of the optical disc, and in which the disc is recorded in the OTP (Opposite Track Path) type. Upon receipt of a command of pausing, a pausing operation is performed by switching a moving direction of a focal point of an optical pickup in accordance with layer information of the recording layer to be currently reproduced.
摘要:
A method for reproducing information on a dual layer disc which has two recording layers including layer 0 and layer 1 reproducible from one side of the [disk] disc, wherein each layer has a plurality of sectors. The method includes the steps of emanating an optical beam from a laser source, concentrating the optical beam on a recording layer with an objective lens, moving the objective lens in the direction of the thickness of the [disk] disc so that a focal point of the objective lens is focused on one layer of the two recording layers, obtaining a present layer information of a sector of the recording layer being reproduced from the reflected light from the [disk] disc, confirming a target layer information of a target recording layer of a target information, and moving the objective lens in a direction of the thickness of the [disk] disc until the focal point of the objective lens is focused on layer 1 when the present layer information is layer 0 and the target layer information is layer 1.
摘要:
There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving device to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processor similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.
摘要:
There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving device to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing circuit similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.
摘要:
There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving means to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing means similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.
摘要:
In an optical disk apparatus and a disk rotation speed control method thereof, enabling to rotate a disk at high speed, with stability and certainty, irrespective of mass eccentricity thereof, detection is made on the greatest value and the smallest value on the signal after conducting a process of a band pass filter 511 on a lens error signal in a step response of a pickup, with using a wobble signal in the place of a tracking error signal and chaining an offset, when controlling the rotation speed of the apparatus by loading an optical disk therein, and thereafter, determination is made on whether the disk rotation speed be shifted to the high speed or not, upon basis of a value obtained through comparison of the maximum value (Max_spnup) and the minimum value (Min_spnup) obtained with the greatest value (Max_step) and said smallest value (Min_step) memorized, when shifting the disk rotation to the high speed. X=(Max—spnup−Min—spnup)/(Max_step−Min_step)
摘要:
The present invention provides an optical disk apparatus capable of stably performing a layer jump on an optical disk having plural recording layers and non-uniform interlayer distances. In an optical disk with at least three recording layers and non-uniform interlayer distances between respective recording layers, if a layer jump is carried out from a first recording layer to a second recording layer, a distance from the first recording layer to the second recording layer is obtained and driving voltages set according to the distance are applied to an actuator for the layer jump to carry out the layer jump. At this time, interlayer distances for combinations of the respective recording layers and applied driving voltages thereto are stored in a memory in advance and when necessary, corresponding driving voltages are read out from the memory and are set for the layer jump.
摘要:
In an optical disk apparatus and a disk rotation speed control method thereof, enabling to rotate a disk at high speed, with stability and certainty, irrespective of mass eccentricity thereof, detection is made on the greatest value and the smallest value on the signal after conducting a process of a band pass filter 511 on a lens error signal in a step response of a pickup, with using a wobble signal in the place of a tracking error signal and chaining an offset, when controlling the rotation speed of the apparatus by loading an optical disk therein, and thereafter, determination is made on whether the disk rotation speed be shifted to the high speed or not, upon basis of a value obtained through comparison of the maximum value (Max_spnup) and the minimum value (Min_spnup) obtained with the greatest value (Max_step) and said smallest value (Min_step) memorized, when shifting the disk rotation to the high speed. X=(Max—spnup−Min—spnup)/(Max_step−Min_step)
摘要翻译:在光盘装置及其盘转速控制方法中,无论其质量偏心如何,能够稳定而且确定地高速旋转盘,就能够检测导通后的信号的最大值和最小值 通过使用摆动信号代替跟踪误差信号并链接偏移,在拾取器的阶跃响应中的透镜误差信号上的带通滤波器511的处理,当通过加载装置来控制装置的旋转速度时 光盘,此后,根据通过比较最大值(Max_spnup)和最小值(Min_spnup)获得的值,确定盘转速是否转移到高速 当将磁盘旋转移动到高速时,存储最大值(Max_step)和所述最小值(Min_step)。 X =(Max-spnup-Min-spnup)/(Max_step-Min_step)