Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1996-01-23
1996-10-15
Epps, Georgia Y.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 60, 369 48, 369 58, 360 39, 360 48, 360 51, G11B 700
Patent
active
055661556
ABSTRACT:
A digital signal reproducing apparatus which can reproduce a digital signal without deteriorating the performance of a Viterbi decoder being deteriorated even if a positional error due to some mechanism causes in reproducing information from a recording medium or amplitude fluctuation in a red signal due to fluctuation in characteristics of the recording medium should occur. The digital signal reproducing apparatus performs an A/D conversion of a read signal read from the recording medium to convert it to a digital sample value series, obtains an amplitude value according to a result of subtraction between a maximum sample value having a maximum level of sample values in the sample value series and a minimum sample value having a minimum level of sample values in said sample value series, and supplies a value obtained by uniformly each of the estimated sample values in a Viterbi decoder by this amplitude value as a final estimated sample value to the Viterbi decoder.
REFERENCES:
patent: 5448544 (1995-09-01), Tsuchinaga et al.
patent: 5469415 (1995-11-01), Fujita et al.
Edun Muhammad
Epps Georgia Y.
Pioneer Electronic Corporation
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