Method and device for determining slicing level of track-crossing signal
OwnerHsiang-Ji Hsieh, Ya-Lun Yang +1inventors
InventorsHsiang-Ji Hsieh, Ya-Lun Yang, Yu-Hsin Lin
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Abstract
The present invention provides a method and a related device for determining a slicing level of a track-crossing signal. The method includes reading a Track Error Zero Crossing (TEZC) signal of an optical storage device, reading the track-crossing signal such as a Radio Frequency Ripple (RFRP) signal of the optical storage device, sampling a peak level and a bottom level from the track-crossing signal according to the track-crossing signal and the TEZC signal, and determining a level between the peak level and the bottom level as the slicing level.
Claims22
A method for determining a slicing level of a track-crossing signal, comprising:
- reading a Track Error Zero Crossing (TEZC) signal of an optical storage device;
- reading a track-crossing signal of the optical storage device;
- sampling a peak level and a bottom level from the track-crossing signal according to the track-crossing signal and the TEZC signal;
- and
- determining a level between the peak level and the bottom level as the slicing level.
A circuit for determining a slicing level of a track-crossing signal, comprising:
- a control unit coupled to an optical storage device for generating a peak level sampling trigger signal and a bottom level sampling trigger signal according to the track-crossing signal of the optical storage device and a Track Error Zero Crossing (TEZC) signal of the optical storage device;
- a first sample and hold circuit coupled to the optical storage device and the control unit for sampling a peak level from the track-crossing signal according to the peak level sampling trigger signal, the peak level being utilized as an output of the first sample and hold circuit;
- a second sample and hold circuit coupled to the optical storage device and the control unit for sampling a bottom level from the track-crossing signal according to the bottom level sampling trigger signal, the bottom level being utilized as an output of the second sample and hold circuit;
- and
- a slicing level generating unit coupled to the first sample and hold circuit and the second sample and hold circuit for determining a level between the peak level and the bottom level as the slicing level.
Dependencies are inferred from the claim text.