Patents Assigned to Nippon Hoso Kyokai
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Patent number: 12034969Abstract: An image encoding device encodes a block-based target image. The image encoding device comprises, in a transform skip mode in which orthogonal transform processing of the target image is skipped, a motion compensation predictor configured to generate a prediction image corresponding to the target image by performing motion compensation prediction using a plurality of reference images, an evaluator configured to evaluate a degree of similarity between the plurality of reference images on a pixel-by-pixel basis, a subtractor configured to calculate prediction residuals each indicating a difference between the target image and the prediction image on a pixel-by-pixel basis, a rearranger configured to rearrange the prediction residuals based on a result of evaluation by the evaluator and an encoder configured to encode the prediction residuals rearranged by the rearranger.Type: GrantFiled: March 29, 2023Date of Patent: July 9, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Patent number: 12022074Abstract: An image encoding device (1) encodes a block-based target image. The image encoding device (1) comprises: a predictor (109) configured to generate a prediction image corresponding to the target image by performing prediction using a plurality of reference images; an evaluator (111) configured to evaluate a degree of similarity between the plurality of reference images on a pixel-by-pixel basis; a calculator (101) configured to calculate a prediction residual indicating a pixel-based difference between the target image and the prediction image; a determiner (112) configured to determine a partial area, to which an orthogonal transform and quantization are to be applied, of the prediction residual based on a result of the evaluation by the evaluator; and a transformer/quantizer (102) configured to perform an orthogonal transform and quantization only for the partial area in the prediction residual.Type: GrantFiled: September 27, 2022Date of Patent: June 25, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Patent number: 12015789Abstract: An encoding device 1 includes: a merge predictor 181a configured to generate area prediction images using motion vectors of a plurality of divided areas obtained by dividing an encoding-target block and merge areas at boundaries of a plurality of the generated area prediction images through weighted averaging to generate a prediction block of the encoding-target block: and a filter controller 161 configured to control the deblocking filter based on a position of a merged area merged by the merge predictor 181a through the weighted averaging.Type: GrantFiled: February 25, 2022Date of Patent: June 18, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Publication number: 20240195992Abstract: A method includes: decoding a bitstream and thereby outputting a transform coefficients for each color component of the block, a first flag indicating for each color component whether the block includes a non-zero transform coefficient, and a second flag indicating whether the block has been encoded using a color space transform that transforming a color space of a prediction residual from a color space of the original image to another color space; performing a color space inverse transform for the prediction residual restored from the transform coefficients, when the second flag indicates that the block has been encoded using the color space transform; and determining whether to perform chroma residual scaling for the prediction residual of the chrominance component, based on the first flag of a chrominance component and the second flag, the chroma residual scaling that performs scaling based on a luminance component corresponding to the chrominance component.Type: ApplicationFiled: January 23, 2024Publication date: June 13, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Shimpei NEMOTO, Atsuro ICHIGAYA
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Patent number: 11997262Abstract: An intra prediction device performing intra prediction on a luminance block and a chrominance block includes: a chrominance candidate specifier configured to specify a mode number of an intra prediction mode applied to the luminance block corresponding to the chrominance block as one of candidates for an intra prediction mode to be applied to the chrominance block; and a chrominance prediction mode converter configured to convert the mode number before conversion specified by the chrominance candidate specifier using a conversion table and output a mode number after conversion. In the conversion table, for directional prediction, a given number of mode numbers in ascending order of the mode number among the mode numbers before conversion are associated with a given number of mode numbers in descending order of the mode number among the mode numbers after conversion.Type: GrantFiled: August 4, 2022Date of Patent: May 28, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Patent number: 11991367Abstract: An image encoding device (1) according to a first feature encodes blocks obtained by dividing an original image of a frame included in a video. The image encoding device (1) includes a code amount allocator (180) configured to allocate a code amount to each of a plurality of intra prediction modes defined in advance, a mode selector (171) configured to select an intra prediction mode to be applied to a target block of intra prediction from among the plurality of intra prediction modes, and an encoder (130) configured to encode identification information indicating the selected intra prediction mode in accordance with the allocated code amount. The code amount allocator (180) calculates a feature amount of a plurality of reference pixels adjacent to the target block and changes a manner of allocation of code amounts to the plurality of intra prediction modes based on the calculated feature amount.Type: GrantFiled: June 8, 2022Date of Patent: May 21, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shimpei Nemoto, Shunsuke Iwamura, Atsuro Ichigaya
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Patent number: 11991370Abstract: An intra predictor (181) for performing intra prediction on each of blocks obtained by dividing an original image in the form of a frame, the intra predictor (181) includes; a linear model calculator (1811a) configured to calculate a linear model of the luminance component and the chroma component of the target block using decoded pixel values of the luminance component and decoded pixel values of the chroma component around the target block on which the intra prediction is performed; a chroma component predictor (1811b) configured to predict pixel values of the chroma component of the target block by applying the linear model calculated by the linear model calculator (1811a) to decoded pixel values of a luminance component of the target block; and a chroma component corrector (1812) configured to correct predicted pixel values of the chroma component obtained by the chroma component predictor (1811b) using decoded pixel values that were not used to calculate a linear model by the linear model calculator (181Type: GrantFiled: March 29, 2023Date of Patent: May 21, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Patent number: 11991356Abstract: A deblocking filter control device that controls a deblocking filter process performed on a decoded image includes: a parameter deriver configured to derive a parameter value that controls a filter strength in the deblocking filter process; and a parameter transformer configured to output a transformed parameter value by transforming the parameter value based on an input bit depth that is a bit depth of the video signal, wherein when the input bit depth is smaller than a predetermined bit depth, the parameter transformer is configured to output the transformed parameter value by adding an offset value to the parameter value and making a bit shift of a result of the addition, and the parameter transformer is configured to change the offset value based on the input bit depth.Type: GrantFiled: January 27, 2023Date of Patent: May 21, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Shimpei Nemoto, Atsuro Ichigaya
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Publication number: 20240129470Abstract: An encoding device encodes each encoding-target block.Type: ApplicationFiled: December 6, 2023Publication date: April 18, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Shimpei NEMOTO, Atsuro ICHIGAYA
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Patent number: 11963433Abstract: The present invention provides an organic electroluminescence device capable of having not only a device lifetime comparable to that of an existing organic electroluminescence device but also a small thickness of smaller than 10 ?m and excellent flexibility. The present invention relates to an organic electroluminescence device having a structure including: an anode; a cathode on a substrate; and a laminate of multiple layers between the anode and the cathode, the device having a thickness of smaller than 10 ?m.Type: GrantFiled: December 6, 2019Date of Patent: April 16, 2024Assignees: The University of Tokyo, Nippon Hoso Kyokai, Nippon Shokubai Co., Ltd.Inventors: Takao Someya, Tomoyuki Yokota, Hirohiko Fukagawa, Takahisa Shimizu, Katsuyuki Morii, Tsuyoshi Goya, Kenji Kuwada
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Publication number: 20240121428Abstract: A prediction image correcting device comprises a predictor (108) configured to predict a target image block obtained by dividing a present image frame by using a plurality of reference images to generate a prediction image corresponding to the target image block a prediction accuracy evaluator (109) configured to evaluate prediction accuracy of the prediction image based on a degree of similarity between the plurality of reference images used for generating the prediction image and a corrector (110) configured to perform correction processing on the prediction image by using a decoded neighboring block adjacent to the target image block, wherein the corrector is configured to control the correction processing based at least on an evaluation result of the prediction accuracy evaluator.Type: ApplicationFiled: December 5, 2023Publication date: April 11, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Atsuro ICHIGAYA, Shimpei NEMOTO
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Patent number: 11936885Abstract: A method includes: decoding a bitstream and thereby outputting a transform coefficients for each color component of the block, a first flag indicating for each color component whether the block includes a non-zero transform coefficient, and a second flag indicating whether the block has been encoded using a color space transform that transforming a color space of a prediction residual from a color space of the original image to another color space; performing a color space inverse transform for the prediction residual restored from the transform coefficients, when the second flag indicates that the block has been encoded using the color space transform; and determining whether to perform chroma residual scaling for the prediction residual of the chrominance component, based on the first flag of a chrominance component and the second flag, the chroma residual scaling that performs scaling based on a luminance component corresponding to the chrominance component.Type: GrantFiled: May 1, 2023Date of Patent: March 19, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Shimpei Nemoto, Atsuro Ichigaya
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Publication number: 20240080476Abstract: An image encoding device 1 that encodes an encoding target block obtained by dividing an image, the image encoding device including: an intra predictor 172 configured to predict the encoding target block through intra prediction to generate a prediction block; and a transformer 121 configured to perform orthogonal transform processing on a prediction residual representing an error of the prediction block with respect to the encoding target block. The intra predictor includes: a weighted controller 172c configured to control the weighted combining processing dependent on positions of prediction pixels within the prediction block based on a type of transform to be applied in the orthogonal transform processing in the transformer; and a corrector 172b configured to correct the prediction pixels by performing the weighted combining processing on reference pixels adjacent to the encoding target block and the prediction pixels.Type: ApplicationFiled: November 8, 2023Publication date: March 7, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Atsuro ICHIGAYA, Shimpei NEMOTO
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Publication number: 20240073443Abstract: A prediction image correcting device comprises a predictor (108) configured to predict a target image block obtained by dividing a present image frame by using a plurality of reference images to generate a prediction image corresponding to the target image block a prediction accuracy evaluator (109) configured to evaluate prediction accuracy of the prediction image based on a degree of similarity between the plurality of reference images used for generating the prediction image and a corrector (110) configured to perform correction processing on the prediction image by using a decoded neighboring block adjacent to the target image block, wherein the corrector is configured to control the correction processing based at least on an evaluation result of the prediction accuracy evaluator.Type: ApplicationFiled: November 2, 2023Publication date: February 29, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Atsuro ICHIGAYA, Shimpei NEMOTO
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Publication number: 20240048690Abstract: An image encoding device for block-dividing and encoding an original image of a frame unit constituting a moving image is disclosed that includes a predictor circuitry configured to generate a predicted image, a weighted average processor configured to generate a block of a new predicted image, a prediction residual signal generator circuitry configured to calculate an error of each prediction signal of the block of the predicted image and to generate a prediction residual signal, a sub-block divider circuitry configured to divide the prediction residual signal configured to divide the predict residual signal, and a transformation selection applier circuitry configured to selectively apply a plurality of types of transformation processes for a divided sub-block of the prediction residual signal.Type: ApplicationFiled: October 18, 2023Publication date: February 8, 2024Applicant: NIPPON HOSO KYOKAIInventors: Shunsuke IWAMURA, Atsuro ICHIGAYA, Shinichi SAKAIDA
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Publication number: 20240040128Abstract: An image encoding device (1) includes a motion compensation predictor (109) configured to generate a prediction image corresponding to a target image by performing motion compensation prediction using a plurality of reference images, and an evaluator (111) configured to evaluate prediction accuracy of the prediction image for each image portion including one or more pixels by calculating a degree of similarity between the plurality of reference images for each image portion.Type: ApplicationFiled: October 6, 2023Publication date: February 1, 2024Applicant: NIPPON HOSO KYOKAIInventors: Atsuro ICHIGAYA, Shunsuke IWAMURA, Shimpei NEMOTO, Kazuhisa IGUCHI
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Patent number: 11889031Abstract: An encoding device encodes each encoding-target block.Type: GrantFiled: October 6, 2022Date of Patent: January 30, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Shimpei Nemoto, Atsuro Ichigaya
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Patent number: 11877003Abstract: A prediction image correcting device comprises a predictor (108) configured to predict a target image block obtained by dividing a present image frame by using a plurality of reference images to generate a prediction image corresponding to the target image block a prediction accuracy evaluator (109) configured to evaluate prediction accuracy of the prediction image based on a degree of similarity between the plurality of reference images used for generating the prediction image and a corrector (110) configured to perform correction processing on the prediction image by using a decoded neighboring block adjacent to the target image block, wherein the corrector is configured to control the correction processing based at least on an evaluation result of the prediction accuracy evaluator.Type: GrantFiled: March 30, 2022Date of Patent: January 16, 2024Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto
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Patent number: 11877021Abstract: A transmitting device (30, 30a) is configured to transmit, to a receiving device (40, 40a), a plurality of video signals captured from different positions, the plurality of video signals being grouped by a plurality of groups depending on imaging positions at which the video signals are captured. The transmitting device (30, 30a) comprises: a controller (32) configured to assign an ID for identifying each of the plurality of groups; and a communication interface (37) configured to transmit a video signal to which the ID is assigned, to the receiving device (40, 40a).Type: GrantFiled: December 25, 2020Date of Patent: January 16, 2024Assignee: NIPPON HOSO KYOKAIInventor: Shuichi Aoki
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Patent number: 11849141Abstract: A prediction image correcting device comprises a predictor (108) configured to predict a target image block obtained by dividing a present image frame by using a plurality of reference images to generate a prediction image corresponding to the target image block a prediction accuracy evaluator (109) configured to evaluate prediction accuracy of the prediction image based on a degree of similarity between the plurality of reference images used for generating the prediction image and a corrector (110) configured to perform correction processing on the prediction image by using a decoded neighboring block adjacent to the target image block, wherein the corrector is configured to control the correction processing based at least on an evaluation result of the prediction accuracy evaluator.Type: GrantFiled: February 22, 2023Date of Patent: December 19, 2023Assignee: NIPPON HOSO KYOKAIInventors: Shunsuke Iwamura, Atsuro Ichigaya, Shimpei Nemoto