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. 09, 2018
Filed:
Sep. 21, 2015
Applicant:
Thomson Licensing, Issy les Moulineaux, FR;
Inventors:
John Sidney Stewart, Indianapolis, IN (US);
Loic Fontaine, Noyal-sur-Vilaine, FR;
Anthony Pesin, Chateaugiron, FR;
Assignee:
INTERDIGITAL CE PATENT HOLDINGS, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/26 (2006.01); H04J 11/00 (2006.01); H04N 21/2383 (2011.01); H04N 21/438 (2011.01); H04N 21/61 (2011.01);
U.S. Cl.
CPC ...
H04L 27/265 (2013.01); H04J 11/0023 (2013.01); H04L 27/264 (2013.01); H04N 21/2383 (2013.01); H04N 21/438 (2013.01); H04N 21/6112 (2013.01);
Abstract
A broadcast TV signal is a DVB-T2 based system. A DVB-T2 transmitter checks OFDM symbols before transmission to determine a level of adjacent channel interference (ACI). If the of level of ACI is too high, i.e., above a threshold value, the OFDM symbols are filtered before transmission. Otherwise, the OFDM symbols are transmitted without filtering. A filtering field is added to an LI pre-signaling table of the broadcast DVB-T2 signal to signal a DVB-T2 receiver when the received OFDM symbols have been filtered.