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. 10, 2017
Filed:
Jun. 11, 2013
Applicant:
Research IN Motion Limited, Waterloo, CA;
Inventors:
Nguyen Nguyen, Waterloo, CA;
Dake He, Waterloo, CA;
Assignee:
BlackBerry Limited, Waterloo, Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 7/12 (2006.01); H04N 11/02 (2006.01); H04N 11/04 (2006.01); H04N 19/126 (2014.01); H04N 19/593 (2014.01); H04N 19/14 (2014.01); H04N 19/157 (2014.01); H04N 19/18 (2014.01);
U.S. Cl.
CPC ...
H04N 19/126 (2014.11); H04N 19/14 (2014.11); H04N 19/157 (2014.11); H04N 19/18 (2014.11); H04N 19/593 (2014.11);
Abstract
Methods of encoding and decoding video are described. The methods for encoding and decoding a picture partitioned into blocks include determining an activity rank for a block, based on a block size of the block and an intra-coding mode for the block; calculating a normalization value based on the activity rank divided by an average activity rank determined over a plurality of previously-encoded/decoded blocks; and quantizing/dequantizing a set of transform domain coefficients for the block using a quantization step size adjusted by the normalization value.