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:
Jul. 24, 2001
Filed:
Aug. 26, 1998
Tian Jun Wang, Indianapolis, IN (US);
Thomson Licensing, S.A., Boulogne, FR;
Abstract
A receiver for processing a VSB modulated signal containing terrestrial broadcast high definition television information and a pilot component includes an input analog-to-digital converter (,) for producing a datastream which is oversampled at twice the received symbol rate, and a digital demodulator (,; FIG.,) with a data reduction network (,) in a phase control loop. A segment sync detector (,; FIGS.,) uses an abbreviated correlation reference pattern to recover a twice symbol rate sampling clock for the digital converter (,). A DC offset associated with the pilot component is removed (,; FIG.,) from the demodulated signal before it is applied to an NTSC interference detection network (,; FIG.,). The interference detection network includes a comb filter network (,) responsive to a twice symbol rate sampled data datastream, and exhibits a sample delay dimensioned to avoid aliasing in the combed frequency spectrum (FIG.,), thereby increasing the effectiveness of NTSC co-channel interference detection.