| 摘要 |
<p>The present invention relates to an adaptive Viterbi detector, and to an apparatus for reading from and/or writing to recording media using such adaptive Viterbi detector. <??>It is an object of the invention to offer an alternative design for an adaptive Viterbi detector in order to improve the phase locking and the correct data restoring for an RF signal exhibiting a strong vertical asymmetry. <??>This object is achieved by a Viterbi detector with adaptive reference levels for bit recovery from an input RF signal, in which the reference levels are adaptive to the incoming RF signal, with means for optimising the reference levels for every state transition based on the deviation between the input RF level and the corresponding reference level, which is determined by the current state with the largest likelihood. <IMAGE></p> |
