Patents by Inventor Kimihiko Kazui
Kimihiko Kazui has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Video encoding apparatus, video encoding method, video decoding apparatus, and video decoding method
Patent number: 10375392Abstract: A video encoding apparatus corrects filter coefficients of an in-loop filter applied to an encoded reference block adjacent to a block to be encoded, based on a quantization value applied to the reference block and a quantization value applied to the block to be encoded when a mode of an in-loop filter applied to the block to be encoded is same as a mode of the in-loop filter applied to the reference block, uses the corrected filter coefficients to apply the in-loop filter to a locally-decoded block that is obtained by encoding the block to be encoded once and decoding the encoded block to be encoded, and adds, to encoded data of the block to be encoded, information indicating that the block to be encoded refers to the reference block for the in-loop filter.Type: GrantFiled: December 11, 2017Date of Patent: August 6, 2019Assignee: FUJITSU LIMITEDInventor: Kimihiko Kazui -
Publication number: 20190200033Abstract: Embodiments of this disclosure provide an image encoding/decoding methods and apparatuses and an image processing equipment. The image encoding method includes: determining a search sub-region of a current encoding unit from a plurality of sub-regions of a search region according to one or more motion vectors of one or more encoded units; obtaining one or more motion vectors of the current encoding unit based on the search sub-region; calculating residual information on the current encoding unit according to the motion vectors; and encoding the residual information on the current encoding unit into a bit stream. Hence, the search region may be reduced, and the number of search points may be lowered, thereby shortening PMMVD encoding/decoding time.Type: ApplicationFiled: February 27, 2019Publication date: June 27, 2019Applicant: FUJITSU LIMITEDInventors: Xuan FU, Guillaume BARROUX, Kimihiko KAZUI
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Publication number: 20190166373Abstract: An image encoding/decoding method and apparatus and image processing equipment, in which encoding/decoding is/are performed on a plurality of sub-predicting units of a predicting unit in an intra prediction manner. The image encoding method includes: determining a prediction mode of the predicting unit; respectively calculating residual information on the plurality of sub-predicting units of the predicting unit; and encoding information on the prediction mode of the predicting unit and the residual information on the plurality of sub-predicting units into a bit steam. Hence, an intra prediction result may be provided more accurately without increasing overmuch encoding cost.Type: ApplicationFiled: January 30, 2019Publication date: May 30, 2019Applicant: FUJITSU LIMITEDInventors: Jianqing ZHU, Zheng WANG, Kimihiko KAZUI
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Patent number: 10250891Abstract: A storage circuit stores a decoded image of a coded image that is coded before a coding target image included in a video to which the still-image coding and the video coding are applied. A video coding circuit codes the coding target image by inter prediction coding that uses the decoded image as a reference image when the still-image coding is applied to the mage that is one image previous to the coding target image and the video coding is applied to the coding target image.Type: GrantFiled: March 14, 2016Date of Patent: April 2, 2019Assignee: FUJITSU LIMITEDInventors: Kimihiko Kazui, Kohji Yamada
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Publication number: 20190052882Abstract: A first encoder divides an encoding target image included in a video into a plurality of blocks, and encodes each of the plurality of blocks by performing a prediction coding by use of filtering processing. A second encoder encodes a parameter that represents a direction of a line of pixels in the filtering processing. Here, when an encoding target block that is one of the plurality of blocks has a rectangular shape, the second encoder changes, according to a direction of a long side of the rectangular shape, a process of encoding the parameter.Type: ApplicationFiled: August 6, 2018Publication date: February 14, 2019Applicant: FUJITSU LIMITEDInventors: Guillaume Denis Christian Barroux, Kimihiko KAZUI, Kenshiro Takeuchi
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Patent number: 10116962Abstract: A generation circuit generates first palette information from a decoded image of a first block used for predicting second palette information of a second block in a coding target image when the first block has not received palette coding. A storage circuit stores the first palette information. A coding circuit performs prediction coding on the second palette information by using the first palette information so as to generate coded palette information.Type: GrantFiled: September 7, 2016Date of Patent: October 30, 2018Assignee: FUJITSU LIMITEDInventors: Kimihiko Kazui, Jianqing Zhu
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Video encoding apparatus, video decoding apparatus, video encoding method, and video decoding method
Patent number: 10070144Abstract: A video encoding apparatus appends decoding delay correction information and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order in the video data than a first picture that may potentially be spliced to a trailing end of other encoded video data have been discarded, the first picture and subsequent pictures in the encoded video data can be continuously decoded and displayed by a video decoding apparatus. The video decoding apparatus corrects the decoding delay and display delay of the first picture and its subsequent pictures by using the decoding delay correction information and display delay correction information.Type: GrantFiled: March 17, 2016Date of Patent: September 4, 2018Assignee: FUJITSU LIMITEDInventors: Kimihiko Kazui, Satoshi Shimada, Junpei Koyama -
Patent number: 10051273Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: GrantFiled: December 22, 2017Date of Patent: August 14, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
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VIDEO ENCODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING APPARATUS, AND VIDEO DECODING METHOD
Publication number: 20180184087Abstract: A video encoding apparatus corrects filter coefficients of an in-loop filter applied to an encoded reference block adjacent to a block to be encoded, based on a quantization value applied to the reference block and a quantization value applied to the block to be encoded when a mode of an in-loop filter applied to the block to be encoded is same as a mode of the in-loop filter applied to the reference block, uses the corrected filter coefficients to apply the in-loop filter to a locally-decoded block that is obtained by encoding the block to be encoded once and decoding the encoded block to be encoded, and adds, to encoded data of the block to be encoded, information indicating that the block to be encoded refers to the reference block for the in-loop filter.Type: ApplicationFiled: December 11, 2017Publication date: June 28, 2018Applicant: FUJITSU LIMITEDInventor: Kimihiko KAZUI -
Publication number: 20180184097Abstract: An apparatus executes a first process that includes palette coding a first pixel value in a block included in a video to generate a coding result, the first pixel value being registered in a palette of the block, quantizing a second pixel value in the block to generate a quantization result, the second pixel value being not registered in the palette, generating a first local decoding result from the coding result, and generating a second local decoding result from the quantization result, executes a second process that includes applying filter processing to the second local decoding result to generate a local decoded image of the block, the local decoded image including the first local decoding result and a result obtained by applying the filter processing to the second local decoding result, executes a third process that includes outputting a coded video including the coding result and the quantization result.Type: ApplicationFiled: November 17, 2017Publication date: June 28, 2018Applicant: FUJITSU LIMITEDInventor: Kimihiko KAZUI
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Publication number: 20180184116Abstract: An apparatus for a video encoding process executes a difference process for calculating a difference value between corresponding pixels of a first reference block on a first encoded reference picture in a first direction and a second reference block on a second encoded reference picture in a second direction; executes a predictive process for generating a predictive block by calculating a pixel value of the predictive block in accordance with the bi-predictive mode for each pixel in which an absolute value of the difference value is less than a threshold value, and by calculating the pixel value of the predictive block based on a value of the corresponding pixel of one of the first reference block and the second reference block for each pixel in which the absolute value of the difference value is the threshold value or more.Type: ApplicationFiled: December 11, 2017Publication date: June 28, 2018Applicant: FUJITSU LIMITEDInventors: Kenshiro Takeuchi, Kimihiko KAZUI, Satoshi SHIMADA, Hidenobu MIYOSHI, Guillaume Denis Christian Barroux
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Patent number: 9973756Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: GrantFiled: March 31, 2017Date of Patent: May 15, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
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Patent number: 9973774Abstract: A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.Type: GrantFiled: September 17, 2015Date of Patent: May 15, 2018Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Akira Nakagawa, Kimihiko Kazui, Junpei Koyama
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Publication number: 20180124405Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: ApplicationFiled: December 22, 2017Publication date: May 3, 2018Applicant: FUJITSU LIMITEDInventors: Satoshi SHIMADA, Kimihiko KAZUI, Junpei KOYAMA, Akira NAKAGAWA
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Publication number: 20180109800Abstract: A video image decoding device executes a separation process for extracting, from encoded video image data including multiple images, first encoded data obtained by encoding reduced images of first images included in the multiple images, and second encoded data obtained by encoding second images included in the multiple images, executes a first decoding process for decoding the reduced images of the first images from the first encoded data, executes a second decoding process for decoding the second images from the second encoded data, executes a recording process that includes recording first region included in the reduced images, the first region including motions with respect to the second images immediately preceding the first images, and executes a synthesis process for reproducing the multiple images by modifying second region in the second images immediately preceding the first images in accordance with the first region.Type: ApplicationFiled: September 26, 2017Publication date: April 19, 2018Applicant: FUJITSU LIMITEDInventor: Kimihiko KAZUI
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Publication number: 20170264909Abstract: An apparatus for image coding includes a processor to: execute a determining process that includes, when a specific entry included in a first palette for use in coding a first block in a coding-target image is not an entry candidate for a second palette for use in coding a second block to be coded after the first block, determining an entry to be included in the second palette based on a first index indicating a code amount to be generated when the specific entry is to be included in the second palette and a second index indicating a code amount to be generated when the specific entry is not to be included in the second palette; execute a generating process that includes generating the second palette including the entry determined in the determining process; and execute a palette coding process that includes coding the second block by the second palette.Type: ApplicationFiled: February 13, 2017Publication date: September 14, 2017Applicant: FUJITSU LIMITEDInventors: Junpei KOYAMA, Kimihiko Kazui
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Publication number: 20170264913Abstract: A processor requests a first stream encoded by irreversible encoding from an encoding device, decodes the first stream, generates a first decoded image from a first encoded image obtained by encoding one image, and outputs the first decoded image. Then, the processor requests a second stream from the encoding device. The second stream includes a second encoded image obtained by applying inter-prediction to the one image and by encoding a prediction error by reversible encoding, the inter-prediction using a locally decoded image obtained by decoding the first encoded image as a reference image and using a motion vector for which a magnitude is 0. The processor decodes the second stream, generates a second decoded image from the second encoded image, generates a third decoded image that corresponds to the first decoded image by using a result of adding the first and second decoded images, and outputs the third decoded image.Type: ApplicationFiled: May 26, 2017Publication date: September 14, 2017Applicant: FUJITSU LIMITEDInventors: Kimihiko KAZUI, Tomonori KUBOTA, Satoshi SHIMADA, KOHJI YAMADA, Kenshiro Takeuchi
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Patent number: 9743088Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: GrantFiled: October 28, 2016Date of Patent: August 22, 2017Assignee: FUJITSU LIMITEDInventors: Satoshi Shimada, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa
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Video encoding apparatus, video decoding apparatus, video encoding method, and video decoding method
Patent number: 9716896Abstract: A video encoding apparatus appends decoding delay correction information and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order in the video data than a first picture that may potentially be spliced to a trailing end of other encoded video data have been discarded, the first picture and subsequent pictures in the encoded video data can be continuously decoded and displayed by a video decoding apparatus. The video decoding apparatus corrects the decoding delay and display delay of the first picture and its subsequent pictures by using the decoding delay correction information and display delay correction information.Type: GrantFiled: March 17, 2016Date of Patent: July 25, 2017Assignee: FUJITSU LIMITEDInventors: Kimihiko Kazui, Satoshi Shimada, Junpei Koyama -
Publication number: 20170208329Abstract: A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K?1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block.Type: ApplicationFiled: March 31, 2017Publication date: July 20, 2017Applicant: FUJITSU LIMITEDInventors: Satoshi SHIMADA, Kimihiko Kazui, Junpei Koyama, Akira Nakagawa