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:
Sep. 02, 2008
Filed:
Nov. 12, 2003
Ivonete Markman, Carmel, IN (US);
Gabriel Alfred Edde, Indianapolis, IN (US);
Ivonete Markman, Carmel, IN (US);
Gabriel Alfred Edde, Indianapolis, IN (US);
Thomson Licensing, Boulogne Billancourt, FR;
Abstract
An ATSC (Advanced Television Systems Committee) VSB (Vestigial Sideband) receiver includes a carrier tracking loop (CTL) for processing a received ATSC VSB signal and a CTL lock detector. The CTL lock detector includes an averaging filter for averaging the down-converted received ATSC VSB signal to provide a DC offset, an estimator for providing an estimate of the DC offset, and a comparator for providing a lock signal as a function of a comparison between the estimate of the DC offset and the DC offset, wherein the lock signal is representative of either a locked condition or an unlocked condition of the CTL.