Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1996-03-28
1997-11-04
Nelms, David C.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 58, 369 48, G11B 509
Patent
active
056847734
ABSTRACT:
A compatible information reproducing apparatus which performs optimum signal processes corresponding to the kinds of a target recording medium for read signals read out from the target recording medium in which digital data signals have been stored and which can accurately reproduce the recorded digital data. The information reproducing apparatus of different recording media each storing a digital data signal is constructed by: a reading system (1, 2, 5) for reading out the digital data signal recorded on a target recording medium (3) and forming a read signal; an A/D converter (11) for A/D converting the read signal and sequentially forming a reproduction sample values; a prediction value setting circuit (13') for forming prediction values in accordance with the kind of a target recording medium; and a Viterbi decoder (12) for performing a Viterbi decoding based on the prediction values for the reproduction sample values, thereby forming a reproduction digital signal.
REFERENCES:
patent: 4418406 (1983-11-01), Ogawa
patent: 4853915 (1989-08-01), Takasago et al.
patent: 5229985 (1993-07-01), Oshiba
patent: 5452279 (1995-09-01), Yokota et al.
patent: 5508993 (1996-04-01), Hayashi et al.
Huber P. W.
Nelms David C.
Pioneer Electronic Corporation
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