The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2004
Filed:
Jul. 20, 2000
Shoji Marukawa, Ehime, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A digital signal processing apparatus for reading out a signal from a recording medium of a digital recording apparatus of high-frequency cutoff type is provided which includes: a read head for reading out the recorded signal from the recording medium a low-pass filter for removing high frequency noise from the output signal of the read head an analog/digital converter for converting the analog reproduced signal filtered by the low-pass filter to a digital reproduced signal; an FIR filter for filtering the digital reproduced signal with the use of an adaptive equalization coefficient so that the frequency response of the signal is equalized with the partial response which has a frequency characteristic suited for reading the reproduced signal; an adaptive equalization coefficient setting device and a partial response temporal judgment device for determining the adaptive equalization coefficient; and a Viterbi decoder for decoding a partial response equalized data released from the FIR filter to a data for judgment.