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:
Oct. 06, 1998
Filed:
May. 06, 1997
Terrence L Wong, San Francisco, CA (US);
Steven R Spielman, Berkeley, CA (US);
Calimetrics, Inc., Emeryville, CA (US);
Abstract
A system and method are disclosed for compensating for intersymbol interference on an optical disc. The method includes measuring an intersymbol linear transfer function. The intersymbol linear transfer function substantially describes a linear portion of the effect of intersymbol interference on an optically detected read signal from an optical disc. The intersymbol linear transfer function is convolved with a write signal to produce a linearly transformed portion of the optically detected read signal. An inverse linear transfer function of the intersymbol linear transfer function is determined. The inverse linear transfer function has the property of canceling the effect of convolving the intersymbol linear transfer function with the write signal. The optically detected read signal is convolved with the inverse linear transfer function. Thus, the linear portion of the effect of intersymbol interference on an optically detected read signal from an optical disc is canceled by the convolution of the optically detected read signal with the inverse linear transfer function.