Method for recovering data and control chip utilizing the same

A method for recovering data from an optical storage medium, comprising steps of:

• sampling signals associated with data from an optical storage medium;
• locating an electric level distribution range of said sampled signals by realizing a plurality of reference levels according to a predetermined operation;
• and
• decoding said sampled signals to recover data according to said electric level distribution ranges,
• wherein said predetermined operation is a least mean square (LMS) operation performed by means of the following equations:
• ∂
• (
• z
• -
• lx
• )
• 2
• ∂
• lx
• =
• -
• 2
• ⁢
• (
• z
• -
• lx
• )
• (
• 1
• )
• lx′=lx+γ(z−lx) (2)
• where
• lx′ is one of said reference levels,
• γ is an operation factor,
• z is an electric level of one of said sampled signals, and
• lx is one of initial reference values.

A control chip for use with an optical storage medium, comprising:

• a sampling device generating sampled signals according to data stored in said optical storage medium;
• an adjusting device in communication with said sampling device, locating reference levels according to a predetermined operation of electric levels of said sampled signals and a plurality of preset levels;
• and
• a decoding device in communication with said adjusting device, recovering data according to said sampled signals and said reference levels,
• wherein said predetermined operation is a least mean square (LMS) operation performed by means of equations:
• ∂
• (
• z
• -
• lx
• )
• 2
• ∂
• lx
• =
• -
• 2
• ⁢
• (
• z
• -
• lx
• )
• (
• 1
• )
• lx′=lx+γ(z−lx) (2)
• where
• lx′ is one of said reference levels,
• γ is an operation factor,
• z is one of said electric levels of said sampled signals, and
• lx is one of said preset levels.