Digital data signal reproducing apparatus

Details Digital data signal reproducing apparatus Digital data signal reproducing apparatus

1996-01-23

1998-08-25

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

364724011, H03D 100

Patent

active

057990468

ABSTRACT:
A digital data signal reading and reproducing apparatus which can accurately read and reproduce a digital data signal recorded on a recording medium at a high density. There is performed a Viterbi decoding process in which a code series pattern which the digital data signal can take is subjected to the convolution arithmetic calculation by means of discrete impulse responses h(i) obtained by performing the discrete inverse Fourier transformation on the frequency characteristics of a signal recording and reproducing system constructed by the recording medium and its reading device and the results of the convolution arithmetic calculation are made to be the predicted values.

REFERENCES:
patent: 4847871 (1989-07-01), Matsushita et al.
patent: 5291542 (1994-03-01), Itakura et al.
patent: 5424882 (1995-06-01), Kazawa
patent: 5448544 (1995-09-01), Tsuchinaga et al.
patent: 5581568 (1996-12-01), Togami
patent: 5619167 (1997-04-01), Adachi

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