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

• US 20160366440A1
• Filed: 08/26/2016
• Published: 12/15/2016
• Est. Priority Date: 11/07/2011
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Hattori, Hideaki
• Granted Patent: US 10,165,304 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06K 15/1836 Rasterization
• CPC Class Codes: H04N 19/119 Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• CPC Class Codes: H04N 19/127 Prioritisation of hardware or computational resources
• CPC Class Codes: H04N 19/162 User input
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/436 using parallelised computational arrangements
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/593 involving spatial prediction techniques
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards
• CPC Class Codes: H04N 2201/3243 of type information, e.g. handwritten or text document

Abstract

An image encoding apparatus includes a calculation unit configured to calculate a profile indicating a combination of processes which can be decoded by an image decoding apparatus and a level indicating a range of a parameter value which can be decoded by the image decoding apparatus, a determination unit configured to determine a number of horizontal pixels of a tile or a number of horizontal tiles with respect to a specific profile to be N or smaller (N>0) which is a maximum number of horizontal pixels defined in advance according to the level, and to determine a number of vertical pixels of the tile or a number of vertical tiles with respect to the specific profile to be M or smaller (M>0) which is a maximum number of vertical pixels defined in advance according to the level.

Claims

1. An image encoding apparatus configured to encode one or more image frames, the image encoding apparatus comprising:

an acquisition unit configured to acquire information so that a decoding process is able to be performed by the image decoding apparatus;

a determination unit configured to determine a size of a tile according to the acquired information, the tile being a unit of processing in which an intra-picture prediction process is independently performed without reference to other tiles; and

an encoding unit configured to divide each of the one or more image frames into tiles according to the determined size of tiles, and to encode the one or more image frames by performing the intra-picture prediction process independently for each of the tiles.

2. The apparatus according to claim 1, wherein the encoding unit encodes image data on each of a plurality of blocks included in each of the tiles for the one or more image frames.

3. The image encoding apparatus according to claim 1, wherein the tile is further a unit of an inter-frame prediction processing being independently performed.

4. An encoding method for an image encoding apparatus configured to encode one or more image frames, the method comprising:

acquiring information so that a decoding process is able to be performed by the image decoding apparatus;

determining a size of a tile according to the acquired information, the tile being a unit of processing in which an intra-picture prediction process is independently performed without reference to other tiles; and

dividing each of the one or more image frames into tiles according to the size of tiles and encoding the one or more image frames by performing the intra-picture prediction process independently for each of the tiles.

5. The method according to claim 4, wherein image data on each of a plurality of blocks included in each of the tiles for the one or more image frames is encoded.

6. The method according to claim 4, wherein the tile is further a unit of an inter-frame prediction processing being independently performed.

7. A non-transitory computer-readable medium causing a computer to execute an encoding method for an image encoding apparatus configured to encode one or more image frames, the method comprising:

acquiring information so that a decoding process is able to be performed by the image decoding apparatus;

determining a size of a tile according to the acquired information, the tile being a unit of processing in which an intra-picture prediction process is independently performed without reference to other tiles; and

dividing each of the one or more image frames into tiles according to the size of tiles and encoding the one or more image frames by performing the intra-picture prediction process independently for each of the tiles.

8. The non-transitory computer-readable medium according to claim 7, wherein image data on each of a plurality of blocks included in each of the tiles for the one or more image frames is encoded.

9. The non-transitory computer-readable medium according to claim 7, wherein the tile is further a unit of an inter-frame prediction processing being independently performed.