Method and apparatus for signal equalization in a light storage system
First Claim
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1. A method for signal equalization in a light storage system, the method comprising:
- measuring a plurality of run lengths of a signal;
classifying measured run lengths into a plurality of run length sets;
calculating a first average value of a first run length set corresponding to a first run length;
calculating a second average value of a second run length set corresponding to a second run length;
comparing the first average value with a first expected value of the first run length set to determine a first difference value;
comparing the second average value with a second expected value of the second run length set to determine a second difference value; and
adjusting a first parameter to reduce the first difference value and adjusting a second parameter to reduce the second difference value until the first difference value falls within a first range and the second difference value falls within a second range.
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Abstract
A method and apparatus for signal equalization in a light storage system is disclosed. The method includes observing run length of an RF signal read from the optical disc; classifying run lengths into sets; calculating the mean of certain run lengths; comparing the values with expected values of said run lengths to generate an error value; and adjusting equalizing parameters of boost and frequency if the error value lies outside an expected range.
26 Citations
16 Claims
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1. A method for signal equalization in a light storage system, the method comprising:
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measuring a plurality of run lengths of a signal; classifying measured run lengths into a plurality of run length sets; calculating a first average value of a first run length set corresponding to a first run length; calculating a second average value of a second run length set corresponding to a second run length; comparing the first average value with a first expected value of the first run length set to determine a first difference value; comparing the second average value with a second expected value of the second run length set to determine a second difference value; and adjusting a first parameter to reduce the first difference value and adjusting a second parameter to reduce the second difference value until the first difference value falls within a first range and the second difference value falls within a second range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for signal equalization in a light storage system, the apparatus comprising:
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a run length meter comprising; a measuring module for measuring a plurality of run lengths of the signal; a classifying module coupled to the measuring module for classifying measured run lengths into a plurality of run length sets; a calculating module coupled to the classifying module for calculating a first average value of a first run length set corresponding to a first run length and for calculating a second average value of a second run length set corresponding to a second run length; and a comparing module, coupled to the calculating module, for comparing the first average value with a first expected value of the first run length set to determine a first difference value and for comparing the second average value with a second expected value of the second run length set to determine a second difference value; and a processor, coupled to an equalizer and the run length meter, for adjusting a first parameter to reduce the first difference value and adjusting a second parameter to reduce the second difference value until the first difference value falls within a first range and the second difference value falls within a second range. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification