Signal processing apparatus and a data recording and reproducing apparatus including local memory processor
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United States of America Patent
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Feb 14, 2012
Grant Date -
Jul 24, 2008
app pub date -
Dec 21, 2007
filing date -
May 22, 1998
priority date (Note) -
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Abstract
In a data recovery processing, the conventional overhead, primarily, latency due to a rotational recording media is removed. Secondary, in a signal processing or in a recording and reproducing apparatus, reliability of data reproduction is improved by repeatedly processing data. These processing are achieved that input signal, i.e., raw analog signal read from the recording media is digitized to be stored in a secondary storage such as a memory or a FIFO memory. The apparatus includes a signal processing circuit to repeatedly process the stored digital signal in the secondary storage. When detecting data, operation of the circuit is efficiently controlled by a change over detector parameters, in which characteristics for the detecting performance. Resultantly, data recovery processing speed is increased and reliability of data reproduced is improved.
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