[efm data decoding method for optical disk system]
OwnerSl Ouyanginventor
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Abstract
An eight-to-fourteen modulation (EFM) data decoding method for an optical disk system is provided. The method includes the following steps: extracting 14-bit data from a serial data; looking up a modified EFM decoding table for converting the 14-bit data into a corresponding 8-bit data; and outputting the 8-bit data. The modified EFM decoding table includes transformation entries for converting 14-bit data non-conform to the standard EFM modulation rule into the most probable 8-bit one. This data-accessing reliability is effectively upgraded in the embodiment by specially processing those non-conformable 14-bit data.
Claims16
A data decoding method for an optical disk system, comprising the steps of:
- extracting a first batch of data encoded in a first bit format from a serial data;
- looking up a modified decoding table to convert the first batch of data into a second batch of data encoded in a second bit format, wherein the modified decoding table includes a data conversion for a first batch of data thatdoes not conform to a standard modulation rule;
- and
- outputting the second batch of data.
A data decoding method for an optical disk system, comprising the steps of:
- extracting a first batch of data encoded in a first bit format from a serial data;
- modifying the first batch of data to conform to a standard modulation rule if the first batch of data does not conform to the standard modulation rule;
- converting the first batch of data into a second batch of data encoded in a second bit format by consulting a decoding table;
- and
- outputting the second batch of data.
Dependencies are inferred from the claim text.