US 6,337,889 B1 · Partial response demodulating method and apparatus using the same

Abstract

In a data demodulating method, predetermined input data is based upon a response characteristic of the partial response class 4. The predetermined input data is discrete-filtered to thereby produce filtered asymmetrical data. The filtered asymmetrical data is maximum-likelihood-decoded to thereby produce decoded data that is demodulated. Further, a magnetic recording/reproducing apparatus is arranged by using this data demodulating method.

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Facts

Application

09/124,840Filed 30 Jul 1998

Granted

8 Jan 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification7 codes

G11B 20/10055
Filtering or equalising, e.g. setting the tap weights of an FIR filter: using partial response filtering when writing the signal to the medium or…
G11B 5/09
Recording, reproducing, or erasing methods; Read, write or erase circuits therefor: digital recording
G11B 20/10009
Digital recording or reproducing: improvement or modification of read or write signals
H04L 1/0054
Arrangements at the receiver end: maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms

Partial response demodulating method and apparatus using the same

Life of this patent

Abstract

Claims0

Partial response demodulating method and apparatus using the same

Life of this patent

Abstract

Claims0