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1. 发明申请

US20220201337A1 IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM 有权
公开(公告)号：US20220201337A1
公开(公告)日：2022-06-23
申请号：US17690570
申请日：2022-03-09
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa , Miyuki Enokida , Masato Shima
IPC分类号： H04N19/70 , H04N19/119 , H04N19/172 , H04N19/136 , H04N19/80
摘要： An image encoding apparatus for dividing an image into one or more sub-pictures and encoding the one or more sub-pictures, comprises a first encoding unit configured to encode a syntax element corresponding to the number of sub-pictures included in the image, and a second encoding unit configured to encode information used for specifying arrangement of sub-pictures in the image. Only when a numerical value indicated by the syntax element is one or more, the second encoding unit encodes the information used for specifying the arrangement of the sub-pictures in the image.

2. 发明申请

US20220116640A1 IMAGE ENCODING APPARATUS, IMAGE DECODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM 有权
公开(公告)号：US20220116640A1
公开(公告)日：2022-04-14
申请号：US17556480
申请日：2021-12-20
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa , Masato Shima
IPC分类号： H04N19/463 , H04N19/119 , H04N19/176 , H04N19/174 , H04N19/436 , H04N19/136
摘要： An image is divided into a plurality of tiles and the tile is divided into rectangular regions each including at least one block row formed from a plurality of blocks each having a size smaller than the tile. Based on information representing the number of rectangular regions included in a slice of the image, the rectangular region included in the slice is specified. Based on the number of blocks in a vertical direction in the specified rectangular region, the number of pieces of information for specifying a start position of coded data of the block row in the slice is specified. A bitstream in which at least the pieces of information whose number is specified, the information representing the number of rectangular regions included in the slice, and the coded data of the block row are multiplexed is generated.

3. 发明申请

US20210306629A1 IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM 有权
公开(公告)号：US20210306629A1
公开(公告)日：2021-09-30
申请号：US17347357
申请日：2021-06-14
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa , Masato Shima
IPC分类号： H04N19/117 , H04N19/82 , H04N19/186 , H04N19/176
摘要： In prediction, one of a first mode for deriving, using pixels in an image including a target block, predicted pixels in the target block, a second mode for deriving the predicted pixels in the target block using pixels in an image different from the image including the target block, a third mode for generating the predicted pixels in the target block using both the pixels in the image including the target block and pixels in the different image can be used. If the third mode is used in at least one of the first and second blocks, the intensity of deblocking filter to be performed for the boundary between the first and second blocks is set to the same intensity as in a case in which the first mode is used in at least one of the first and second blocks.

4. 发明授权

US10609369B2 Image coding apparatus, image coding method, image decoding apparatus, image decoding method, and program 有权
公开(公告)号：US10609369B2
公开(公告)日：2020-03-31
申请号：US16040371
申请日：2018-07-19
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa
IPC分类号： H04N19/119 , H04N19/196 , H04N19/436 , H04N19/91 , H04N19/46 , H04N19/124
摘要： An image coding apparatus configured to divide an image into one or more slices each including a plurality of blocks and to code each slice on a block-by-block basis includes a first coding unit configured to code blocks included in a first portion of the slice, and a second coding unit configured to code blocks included in a second portion of the slice, wherein, when the second coding unit codes an initial block in the second portion, the second coding unit codes the initial included in the second portion by referring to a first quantization parameter provided to the slice as an initial value and referred to by the first coding unit when the first coding units codes the initial block in the first portion.

5. 发明申请

US20180027249A1 IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND STORAGE MEDIUM 审中-公开
公开(公告)号：US20180027249A1
公开(公告)日：2018-01-25
申请号：US15541330
申请日：2015-12-22
申请人： CANON KABUSHIKI KAISHA
发明人： Mitsuru Maeda , Koji Okawa
IPC分类号： H04N19/31 , H04N19/167 , H04N19/136 , H04N19/44 , H04N19/146
摘要： An image decoding apparatus, the image decoding apparatus decoding encoded data obtained by performing hierarchical coding on a moving image including one or more images using a plurality of temporal layers, includes a first acquisition unit configured to acquire information regarding frame rates of the moving image corresponding to the plurality of temporal layers used in the hierarchical coding, a second acquisition unit configured to acquire information regarding the size of a region of interest of the one or more images, a determination unit configured to determine a frame rate to be used in a case where the region of interest is displayed, in accordance with the information regarding the frame rates corresponding to the respective temporal layers, and the information regarding the size of the region of interest, and a decoding unit configured to decode the region of interest at the determined frame rate.

6. 发明授权

US10123021B2 Image encoding apparatus for determining quantization parameter, image encoding method, and program 有权
公开(公告)号：US10123021B2
公开(公告)日：2018-11-06
申请号：US14301162
申请日：2014-06-10
申请人： CANON KABUSHIKI KAISHA
发明人： Saku Hiwatashi , Koji Okawa
IPC分类号： G06K9/36 , H04N19/154 , H04N19/176 , H04N19/124 , H04N19/14
摘要： An amount of code is reduced for blocks in which visible degradation is not easily susceptible, while a large amount of code is assigned to blocks whose degradation in image quality is easily perceptible thereby suppressing the number of blocks for which a process is performed to achieve high quality image and thus suppressing an increase in the total amount of code. An input image is encoded in units of blocks. A block evaluation value for the block is calculated. The block is divided into N sub-blocks where N is equal to or greater than 2, and a sub-block evaluation value is calculated for each sub-block. A quantization parameter for the block is controlled based on the block evaluation value and the sub-block evaluation values.

7. 发明申请

US20150163492A1 IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD AND STORAGE MEDIUM 有权
标题翻译：图像编码设备，图像编码方法和存储介质
公开(公告)号：US20150163492A1
公开(公告)日：2015-06-11
申请号：US14565177
申请日：2014-12-09
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa
IPC分类号： H04N19/137 , H04N19/136 , H04N19/124
CPC分类号： H04N19/124 , H04N19/14 , H04N19/176
摘要： An image encoding apparatus which encodes an image includes a first acquiring unit configured to acquire an evaluation value for a block being a division of the image, a determining unit configured to determine a class to which the block belongs to among a plurality of classes based on the evaluation value acquired by the first acquiring unit, a second acquiring unit configured to acquire count information describing the number of blocks belonging to a predetermined class of the plurality of classes, and a setting unit configured to set a quantization parameter usable for encoding a block belonging to a different class from the predetermined class based on the count information acquired by the second acquiring unit.
摘要翻译：一种图像编码装置，其对图像进行编码，包括：第一获取单元，被配置为获取对于图像的划分的块的评估值;确定单元，被配置为基于多个等级来确定所述块所属的类别所述评估值由所述第一获取单元获取，第二获取单元，被配置为获取描述属于所述多个类别的预定类别的块的数量的计数信息;以及设置单元，被配置为设置可用于编码块的量化参数基于由第二获取单元获取的计数信息，属于与预定类别不同的类别。

8. 发明授权

US11064198B2 Image coding apparatus, image coding method, image decoding apparatus, image decoding method, and program 有权
公开(公告)号：US11064198B2
公开(公告)日：2021-07-13
申请号：US16799431
申请日：2020-02-24
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa
IPC分类号： H04N19/119 , H04N19/196 , H04N19/436 , H04N19/91 , H04N19/46 , H04N19/124
摘要： An image coding apparatus configured to divide an image into one or more slices each including a plurality of blocks and to code each slice on a block-by-block basis includes a first coding unit configured to code blocks included in a first portion of the slice, and a second coding unit configured to code blocks included in a second portion of the slice, wherein, when the second coding unit codes an initial block in the second portion, the second coding unit codes the initial included in the second portion by referring to a first quantization parameter provided to the slice as an initial value and referred to by the first coding unit when the first coding units codes the initial block in the first portion.

9. 发明授权

US10218991B2 Image encoding apparatus, method of image encoding, and recording medium, image decoding apparatus, method of image decoding, and recording medium 有权
公开(公告)号：US10218991B2
公开(公告)日：2019-02-26
申请号：US15959672
申请日：2018-04-23
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa
IPC分类号： H04N19/436 , H04N19/46 , H04N19/70 , H04N19/513 , H04N19/119 , H04N19/174 , H04N19/44
摘要： Encoded data is decoded based on tile data division information, tile data position information, block line data division information, and block line data position information. The tile data division information indicates whether the encoded data is composed of tile data items that serve as encoded data items of tiles. The tile data position information indicates positions of the tile data items. The block line data division information indicates whether each tile data item is composed of first block line data and second block line data. The first block line data serves as encoded data of a first block line that is a set of blocks arranged linearly. The second block line data serves as encoded data of a second block line next to the first block line. The block line data position information indicates a position of the second block line data.

10. 发明申请

US20180324424A1 IMAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND PROGRAM 审中-公开
公开(公告)号：US20180324424A1
公开(公告)日：2018-11-08
申请号：US16040368
申请日：2018-07-19
申请人： CANON KABUSHIKI KAISHA
发明人： Koji Okawa
IPC分类号： H04N19/119 , H04N19/124 , H04N19/196 , H04N19/436 , H04N19/91
摘要： An image coding apparatus configured to divide an image into one or more slices each including a plurality of blocks and to code each slice on a block-by-block basis includes a first coding unit configured to code blocks included in a first portion of the slice, and a second coding unit configured to code blocks included in a second portion of the slice, wherein, when the second coding unit codes an initial block in the second portion, the second coding unit codes the initial included in the second portion by referring to a first quantization parameter provided to the slice as an initial value and referred to by the first coding unit when the first coding units codes the initial block in the first portion.

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