Patent ID: 6970406

Claim:
An information playback apparatus for reading information of an optical recording medium, comprising: a first detecting device which supplies a difference between respective output signals optically obtained by a pair of detectors for reading information of a first track; a second detecting device which supplies a difference between respective output signals optically obtained by a pair of detectors for reading information of a second track adjacent to the first track; a first demodulating device which demodulates a detected signal supplied from the first detecting device; a second demodulating device which demodulates a detected signal supplied from the second detecting device; a crosstalk extracting device which extracts crosstalk caused by the second track, which is included in a demodulation signal obtained by the first demodulating device, from the same signal; a coefficient controlling device which controls a coefficient based on the crosstalk extracted by the crosstalk extracting device; and a crosstalk canceling device for canceling the above crosstalk on the basis of the coefficient calculated by the coefficient controlling device.