Patent ID: 7978954
Filing Date: 2011-07-12
Classification: G06F

Abstract:
1. A rotation speed control apparatus for a disk recorder, suitable for adjusting disk recording speed of an optical storage system, wherein the optical storage system comprises a buffer and a servo system, the rotation speed control apparatus comprising: a buffer monitor, coupled to the buffer, for outputting a buffer data according to the amount of data in the buffer; and a rotation speed decision maker, coupled between the buffer monitor and the servo system, for outputting a disk-rotation-speed signal according to the buffer data, wherein the servo system adjusts rotation speed of a spindle motor which is in charge of the rotation of a disk in the optical storage system so as to adjust the disk recording speed of the optical storage system according to the disk-rotation-speed signal, wherein the spindle motor has an initial rotation speed, and the adjusted rotation speed of the spindle motor is defined as a new rotation speed; wherein when the new rotation speed is lower than a first non-integer times of the initial rotation speed, the new rotation speed is adjusted to the first non-integer times of the initial rotation speed by the rotation speed decision maker; wherein after the new rotation speed is adjusted to the first non-integer times of the initial rotation speed by the rotation speed decision maker, a variation of the rotation speed of the spindle motor adjusted each time by the rotation speed decision maker is limited between a second non-integer times and a third non-integer times of a current rotation speed of the spindle motor; and wherein a value of the third non-integer is greater than a value of the second non-integer, and a value of the second non-integer is greater than a value of the first non-integer.