Appeal No. 1998-0598
Application No. 08/278,864
digital data have been magnetically recorded through a partial
response encoder.
Claim 1 is illustrative of the claimed invention, and it
reads as follows:
1. A magnetic reproducing apparatus for playing
back a magnetic recording medium on which digital data
have been magnetically recorded through a partial response
encoder, comprising:
a reproducing system for reproducing said
digital data from said magnetic recording medium;
synchronizing signal data detecting means for
receiving said digital data from said reproducing
system and for detecting a synchronizing signal data
part from a reproduced signal data series which
has been
encoded by said partial response encoder;
transmission path characteristics estimating
means for modeling an impulse response between a
recording system and said reproducing system
based on the synchronizing signal data part
encoded by said partial response encoder and
detected by said synchronizing signal data
detecting means, said synchronizing signal data
part being used as a reference signal by said
transmission path characteristics estimating means; and
decoding means for decoding said reproduced
signal data series according to a Viterbi algorithm
based on a transmission model produced by said
transmission path characteristics estimating means.
The references relied on by the examiner are:
Kanota et al. (Kanota) 5,122,912 Jun. 16,
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