Patent ID: 8406103
Filing Date: 2013-03-26
Classification: G11B

Abstract:
1. A data recovery device, adapted to recover a radio frequency (RF) data stream of an optical storage system into a modulation signal, wherein the RF data stream is converted from a RF signal, and the RF signal is obtained by calculating a plurality of electrical signals, the data recovery device comprising: a filter, filtering the RF data stream to generate an original data stream; a tilt detection unit, receiving a first to a fourth data streams converted from the electrical signals, and synthesizing a tangential push-pull data stream by employing the first to the fourth data streams, wherein the tilt detection unit generates a tilt direction signal according to symmetry of a curve composed by the tangential push-pull data stream; a tilt cancellation unit, detecting a plurality of rising areas and falling areas of the original data stream, and reconstructing a plurality of data points corresponding to the rising areas or the falling areas in the original data stream according to the tilt direction signal, so as to generate a tilt repair data stream; and a data conversion unit, recovering the tilt repair data stream to the modulation signal.