| 摘要 |
<p>The present invention relates to a method for receiving and restoring data from an optical recording medium exhibiting strong asymmetry in the regenerated RF signal. According to the invention a method for digital partial response asymmetry compensation of a digital RF signal comprises the steps of: -detecting the asymmetry beta of the digital RF signal through the measurement of the envelopes of a short T pulse (xT pluse) and a long T pulse (yT pulse), T being the bit clock of the recovered bit stream, -determining upper and lower thresholds through the evaluation of the XT upper and lower envelopes and the asymmetry factor beta, and-selecting and compensating only the asymmetric parts of the digital RF signal.</p> |
