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:
May. 19, 2015
Filed:
May. 22, 2009
Applicants:
Wei Zhou, Beijing, CN;
LI Zou, Beijing, CN;
Assignee:
Thomson Licensing, Boulogne-Billancourt, FR;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 11/02 (2006.01); G06F 11/00 (2006.01); H04L 27/34 (2006.01); H04L 1/00 (2006.01); H04L 27/00 (2006.01); H04L 27/36 (2006.01);
U.S. Cl.
CPC ...
H04L 27/3411 (2013.01); H04L 1/0003 (2013.01); H04L 1/0009 (2013.01); H04L 1/0044 (2013.01); H04L 1/005 (2013.01); H04L 1/0057 (2013.01); H04L 27/0008 (2013.01); H04L 27/3416 (2013.01); H04L 27/366 (2013.01);
Abstract
A cable transmitter supports a number of low density parity check (LDPC) coding rates, e.g., ¼, ⅓, ⅖, ½, ⅗, ⅔, ¾, ⅘, ⅚, 8/9 and 9/10; and supports a number of quadrature amplitude modulation (QAM) schemes, e.g., 4-QAM, 16-QAM, 64-QAM, 256-QAM, 1024-QAM or higher. For a selected modulation scheme, the cable transmitter selects between using a non-uniform symbol constellation or a uniform symbol constellation as a function of a selected coding rate.