Speed control of optical information reproducing apparatus based on storage quantity of a buffer memory during access operation

A method for controlling speed of a spindle motor of an optical information reproducing apparatus, wherein the spindle motor drives an optical disc disposed within the optical information reproducing apparatus, and the optical information reproducing apparatus comprises a buffer memory, such that data required by an application is read from the optical disc and transferred to the application via the buffer memory, the method comprising:

• determining an initial speed for the spindle motor to rotate based on a predetermined algorithm;
• rotating the spindle motor with the initial speed;
• reading the data from the optical disc and temporarily storing the data into the buffer memory;
• monitoring a data storage quantity in the buffer memory;
• and
• changing the initial speed of the spindle motor when a monitored data storage quantity is recognized to be outside of a predetermined storage range a predetermined plurality of sequential times.