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. 27, 2018
Filed:
Jan. 18, 2017
Applicant:
Blackberry Limited, Waterloo, CA;
Assignee:
BLACKBERRY LIMITED, Waterloo, ON, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 7/18 (2006.01); H04N 19/18 (2014.01); H04N 19/44 (2014.01); H04N 19/467 (2014.01); H04N 19/91 (2014.01); H04N 19/184 (2014.01);
U.S. Cl.
CPC ...
H04N 19/18 (2014.11); H04N 19/184 (2014.11); H04N 19/44 (2014.11); H04N 19/467 (2014.11); H04N 19/91 (2014.11);
Abstract
Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit. Sign bits are hidden in the parity of partially overlapping subsets of a set of coefficients. This enables the hiding of multiple sign bits per coefficient group. Other information bits may be hidden instead of sign bits in some cases.