Patent ID: 8400892
Filing Date: 2013-03-19
Classification: G11B

Abstract:
1. An information reproduction device comprising: a receiving section that receives request-specification information specifying a piece of data requested by an external device and a specified rotation speed specifying a rotation speed of a disc-shaped storage medium storing data; a disc rotation section that selects, from among a plurality of estimated rotation speeds, a set rotation speed based on the specified rotation speed and rotates the storage medium at the set rotation speed; a data reading section that reads out data from the storage medium at a readout speed that is determined by the set rotation speed of the storage medium; a data storage section that stores the data read out from the storage medium and supplies, from among the stored data, the piece of data corresponding to the request-specification information to the external device; and a data amount determination section that makes a determination as to whether the amount of data stored in the data storage section is greater than or equal to a predetermined amount, wherein the disc rotation section selects, when starting the rotation of the storage medium from rest, an estimated rotation speed of the plurality of estimated rotation speeds that is smaller than the specified rotation speed as the set rotation speed, and, each time the data amount determination section determines that the amount of data stored in the data storage section is greater than or equal to the predetermined amount, sets a larger estimated rotation speed as the set rotation speed to incrementally increase the set rotation speed to the specified rotation speed, and wherein when the data storage section stores a maximum amount of data, an optical beam emitted by the data reading section is stopped for a specified time, the disc-shaped storage medium continues to rotate at the set rotation speed, and the optical beam is restarted such that data readout, by the data reading section, is immediately restarted in accordance with the set rotation speed upon receipt of additional request-specific information.