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:
Apr. 17, 2007
Filed:
Jan. 29, 2002
Masafumi Takiguchi, Kanagawa, JP;
Masafumi Takiguchi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An adaptive type equalization circuit and a playback apparatus can be used for the playback of a digital signal. A playback signal is supplied to an analog to digital converter and phase lock loop such that digital conversion of the playback signal is performed. Characteristic information such as a detection signal from an envelope detector to which the playback signal is supplied, a signal showing a phase lock from the phase lock loop is supplied to a data generation circuit together with a playback signal from the analog to digital converter. The playback signal processed in the data generation circuit and its characteristic information are supplied to a processor such tat operation for weighting coefficients is performed. The weighting coefficients operated or calculated in the processor are supplied to a transversal filter so that adaptive equalization processing for the playback signal is performed.