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:
Feb. 20, 2001
Filed:
Nov. 06, 1998
Il-kwon Kim, Seoul, KR;
Samsung Electronics Co., LTD, , KR;
Abstract
In a data recovery apparatus and method for an optical disk reproduction system, a technique for digital recovery of data from an analog radio frequency (RF) signal is provided. An analog-to-digital converter (ADC) converts an analog radio frequency (RF) signal into a digital signal in response to a reference clock signal. A first adder combines an asymmetry error level to the digital RF signal. An adaptive digital equalizer digitally controls the level of the result added by the first adder, in response to a control signal. A digital level detector calculates the asymmetry error amount using the result added by the first adder, and outputs the control signal according to the output of the adaptive digital equalizer and predetermined coefficients. A viterbi decoder decodes the output of the adaptive digital equalizer into a bit train. A digital edge detector calculates the accuracy of sampling by the analog-to-digital converter, using the result added by the first adder, and outputs phase and frequency control signals according to the calculated accuracy. A reference signal generator outputs the reference clock signal having a frequency which varies in response to the phase and frequency control signals. Thus, data can be accurately recovered.