Patent ID: 7072263

Claim:
An optical disc recording and playback apparatus for reading a signal first stored in a buffer memory and recording the read signal to a disc, and changing the signal recording speed with respect to the disc according to a radial position on the disc, the optical disc recording and playback apparatus comprising: an optical pickup for emitting light onto the disc and detecting reflected light; a pickup control circuit for generating a servo signal on the basis of the state of the reflected light that is detected by the optical pickup, and on the basis of this servo signal, for controlling the emitted light by the optical pickup; an error detection circuit for comparing the servo signal that is obtained in the pickup control circuit and a predetermined error detection level, and detecting errors on the basis of the obtained comparison result; and a system control circuit for first interrupting reading of a signal from the buffer memory and interrupting recording of the signal to the disc when changing said recording speed, in this state changing the rotational speed of the disc so as to correspond to the recording velocity after the change, playing back the signal recorded prior to the interruption at the rotational speed after the change, detecting the state of said servo signal during this playback, and setting said error detection level in the recording at the recording speed after the change on the basis of the state of the detected servo signal.