US Patent No. 9,462,269

IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, PROGRAM, AND STORAGE MEDIUM


Patent No. 9,462,269
Issue Date October 04, 2016
Title Image Encoding Apparatus, Image Encoding Method, Image Decoding Apparatus, Image Decoding Method, Program, And Storage Medium
Inventorship Hideaki Hattori, Kawasaki (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,462,269

1. An image encoding apparatus configured to encode one or more image frames, the image encoding apparatus comprising:
an acquisition unit configured to acquire a profile indicating a decoding process which is able to be performed by an image
decoding apparatus and a level that corresponds to the profile and indicates a range of a parameter value with which the decoding
process is able to be performed by the image decoding apparatus;

a determination unit configured to determine, in an encoding process of a block included in the one or more image frames,
a number of horizontal pixels and a number of vertical pixels of a tile or a number of tiles so that the number of horizontal
pixels and the number of vertical pixels of the tile or the number of tiles satisfies a condition that the number of horizontal
pixels of the tile is N or smaller (N>0) and the number of vertical pixels of the tile is M or smaller (M>0), the tile that
does not mutually overlap with other tiles being a unit of processing in which an intra-picture prediction process is independently
performed without reference to other tiles, N and M being a maximum number of horizontal pixels of a tile and a maximum number
of vertical pixels of a tile, respectively, and defined according to the profile and the level corresponding to the profile;
and

an encoding unit configured to divide each of the one or more image frames into tiles according to the determined number of
horizontal pixels and the determined number of vertical pixels of the tile or the determined number of tiles, and to encode
on each of a plurality of blocks included in each of the tiles, the one or more image frames by performing the intra-picture
prediction process independently by the unit of the tile.