Patents by Inventor Ryuichi KANOH
Ryuichi KANOH 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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Publication number: 20230276057Abstract: An encoder encodes a video, and includes: circuitry; and memory coupled to the circuitry. Using the memory, the circuitry: obtains at least two items of prediction information for a first partition included in the video; derives at least one template from neighboring samples which neighbor the first partition; calculates at least two costs, using the at least one template and the at least two items of prediction information; using the at least two costs, (i) determines at least one splitting direction for the first partition or (ii) assigns one of the at least two items of prediction information to a second partition split from the first partition according to the splitting direction, and another thereof to a third partition split from the first partition according to the splitting direction; and encodes the first partition according to the splitting direction and the at least two items of prediction information.Type: ApplicationFiled: March 7, 2023Publication date: August 31, 2023Inventors: Kiyofumi ABE, Takahiro NISHI, Tadamasa TOMA, Ryuichi KANOH, Chong Soon LIM, Ru Ling LIAO, Hai Wei SUN, Sughosh Pavan SHASHIDHAR, Han Boon TEO, Jing Ya LI
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Publication number: 20230269390Abstract: An encoder is an encoder that encodes a block in a picture using a prediction image of the block, and includes circuitry and memory. Using the memory, the circuitry: calculates a first average pixel value which is an average pixel value of first reference samples out of the first reference samples and second reference samples, The first reference samples are referable and located outside the block and adjacent to a first side of the block. The second reference samples are referable and located outside the block and adjacent to a second side of the block. When generating the prediction image, the circuitry applies the same prediction pixel value to inner samples among current samples to be processed that are included in the block. The inner samples constitute a quadrilateral region including at least two current samples in each of a horizontal direction and a vertical direction.Type: ApplicationFiled: April 20, 2023Publication date: August 24, 2023Inventors: Virginie DRUGEON, Tadamasa TOMA, Takahiro NISHI, Kiyofumi ABE, Ryuichi KANOH
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Publication number: 20230262255Abstract: An encoder which includes circuitry and memory. Using the memory, the circuitry generates a list which includes candidates for a first motion vector for a first partition. The list has a maximum list size and an order of the candidates, and at least one of the maximum list size or the order of the candidates is dependent on at least one of a partition size or a partition shape of the first partition. The circuitry selects the first motion vector from the candidates included in the list; encodes an index indicating the first motion vector among the candidates in the list into the bitstream based on the maximum list size; and generates the predicted image for the first partition using the first motion vector.Type: ApplicationFiled: April 19, 2023Publication date: August 17, 2023Inventors: Chong Soon LIM, Hai Wei SUN, Sughosh Pavan SHASHIDHAR, Han Boon TEO, Ru Ling LIAO, Jing Ya LI, Tadamasa TOMA, Takahiro NISHI, Kiyofumi ABE, Ryuichi KANOH
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Publication number: 20230262254Abstract: An encoder is an encoder that encodes a block in a picture using a prediction image of the block, and includes circuitry and memory. Using the memory, the circuitry: calculates a first average pixel value which is an average pixel value of first reference samples out of the first reference samples and second reference samples, The first reference samples are referable and located outside the block and adjacent to a first side of the block. The second reference samples are referable and located outside the block and adjacent to a second side of the block. When generating the prediction image, the circuitry applies the same prediction pixel value to inner samples among current samples to be processed that are included in the block. The inner samples constitute a quadrilateral region including at least two current samples in each of a horizontal direction and a vertical direction.Type: ApplicationFiled: April 20, 2023Publication date: August 17, 2023Inventors: Virginie DRUGEON, Tadamasa TOMA, Takahiro NISHI, Kiyofumi ABE, Ryuichi KANOH
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Publication number: 20230262231Abstract: An encoder includes memory, and circuitry accessible to the memory. The circuitry accessible to the memory: determines whether OBMC is applicable to generation of a prediction image of a current block, according to whether BIO is to be applied to the generation of the prediction image of the current block; when BIO is to be applied to the generation of the prediction image of the current block, determines that OBMC is not applicable to the generation of the prediction image of the current block, and applies BIO to the generation of the prediction image of the current block without applying OBMC.Type: ApplicationFiled: April 18, 2023Publication date: August 17, 2023Inventors: Kiyofumi ABE, Takahiro NISHI, Tadamasa TOMA, Ryuichi KANOH
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Patent number: 11729398Abstract: When intra prediction is to be used, an encoder determines whether an adaptive basis selection mode is to be used and whether a size of the current block matches a determined size. When the adaptive basis selection mode is to be used and the size matches the determined size, the encoder fixes the first transform basis for the current block to a first determined transform basis in the adaptive basis selection mode, and generates first transform coefficients by performing first transform of residual signals of the current block using the first determined transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode; and generates second transform coefficients by performing second transform of the first transform coefficients using a second transform basis, and quantizes the second transform coefficients, when the intra prediction mode is not the determined mode.Type: GrantFiled: June 23, 2021Date of Patent: August 15, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Masato Ohkawa, Hideo Saitou, Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Ryuichi Kanoh
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Patent number: 11729386Abstract: When a transform-basis adaptive selection mode is enabled, an encoder that transforms residuals of a current block to encode an image: adaptively selects a first horizontal transform basis from among one or more transform basis candidates when a horizontal size of the current block is greater than a first horizontal threshold size; otherwise selects a fixed horizontal transform basis as a first horizontal transform basis; adaptively selects a first vertical transform basis from among the one or more transform basis candidates when a vertical size of the current block is greater than a first vertical threshold size; otherwise selects a fixed vertical transform basis as a first vertical transform basis; and generates first transform coefficients by performing a first horizontal transform and a first vertical transform on the residuals of the current block, using the first horizontal transform basis selected and the first vertical transform basis selected, respectively.Type: GrantFiled: June 25, 2020Date of Patent: August 15, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Masato Ohkawa, Hideo Saitou, Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Ryuichi Kanoh
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Patent number: 11722670Abstract: Various embodiments provide an encoder that performs an up-conversion and a down-conversion on a first quantization matrix to generate a second quantization matrix, and quantizes transform coefficients of a current block using the second quantization matrix. The first quantization matrix has a first number of rows and a first number of columns equal to the first number of rows, and the second quantization matrix has a second number of rows and a second number of columns different from the second number of rows. In the up-conversion, the circuitry generates the second quantization matrix such that one of the second number of rows or the second number of columns is larger than the first number of rows. In the down-conversion, the circuitry generates the second quantization matrix such that the other of the second number of rows or the second number of columns is smaller than the first number of rows.Type: GrantFiled: August 12, 2022Date of Patent: August 8, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Kiyofumi Abe, Ryuichi Kanoh, Takahiro Nishi, Tadamasa Toma
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Publication number: 20230247198Abstract: An encoder includes processing circuitry and a memory coupled to the processing circuitry. The processing circuitry is configured to: select a filter based at least on a prediction mode used for a first block, the filter including first filter coefficients for the first block and second filter coefficients for a second block; multiply values of first pixels among the first block and second pixels among the second block by the first filter coefficients to change a value of a first pixel in the first pixels; and multiply the values of the first pixels among the first block and the second pixels among the second block by the second filter coefficients to change a value of a second pixel in the second pixels.Type: ApplicationFiled: April 5, 2023Publication date: August 3, 2023Inventors: Ryuichi KANOH, Takahiro NISHI, Tadamasa TOMA
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Patent number: 11716492Abstract: An image decoder performs a first partitioning including using a first partition mode, without parsing first splitting information indicative of the first partition mode, to split a first block into a plurality of second blocks in response to that the first block is located adjacent to an edge of a picture and that the dimensions of the first block satisfy a first condition; and performs a second partitioning on the second block by parsing second splitting information indicative of a second partition mode, wherein the second partition mode allows at least one of a quad tree splitting and a binary splitting, and using the second partition mode to split the second block into a plurality of coding units (CUs), wherein the second partition mode prohibits the quad tree splitting of the second block in response to that the second block is located adjacent to the edge of the picture.Type: GrantFiled: June 3, 2022Date of Patent: August 1, 2023Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Ryuichi Kanoh, Kiyofumi Abe, Takahiro Nishi, Tadamasa Toma
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Patent number: 11716473Abstract: Various embodiments provide an encoder that performs an up-conversion and a down-conversion on a first quantization matrix to generate a second quantization matrix, and quantizes transform coefficients of a current block using the second quantization matrix. The first quantization matrix has a first number of rows and a first number of columns equal to the first number of rows, and the second quantization matrix has a second number of rows and a second number of columns different from the second number of rows. In the up-conversion, the circuitry generates the second quantization matrix such that one of the second number of rows or the second number of columns is larger than the first number of rows. In the down-conversion, the circuitry generates the second quantization matrix such that the other of the second number of rows or the second number of columns is smaller than the first number of rows.Type: GrantFiled: August 11, 2022Date of Patent: August 1, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Kiyofumi Abe, Ryuichi Kanoh, Takahiro Nishi, Tadamasa Toma
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Publication number: 20230232034Abstract: A decoder that decodes a current block using a motion vector includes: a processor; and memory. Using the memory, the processor: derives a first candidate vector from one or more candidate vectors of one or more neighboring blocks that neighbor the current block; determines, in a first reference picture for the current block, a first adjacent region that includes a position indicated by the first candidate vector; calculates evaluation values of a plurality of candidate regions included in the first adjacent region; and determines a first motion vector of the current block, based on a first candidate region having a smallest evaluation value among the evaluation values. The first adjacent region is included in a first motion estimation region determined based on the position indicated by the first candidate vector.Type: ApplicationFiled: March 24, 2023Publication date: July 20, 2023Inventors: Takashi HASHIMOTO, Takahiro NISHI, Tadamasa TOMA, Kiyofumi ABE, Ryuichi KANOH
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Publication number: 20230217040Abstract: An encoder includes memory and circuitry. The circuitry: derives a first motion vector in a unit of a prediction block using a first inter frame prediction mode that uses a degree of matching between two reconstructed images of two regions in two difference pictures, the prediction block being obtained by splitting an image included in a video; and performs, in the unit of the prediction block, a first motion compensation process that generates a prediction image by referring to a spatial gradient of luminance in an image generated by performing motion compensation using the first motion vector derived.Type: ApplicationFiled: February 14, 2023Publication date: July 6, 2023Inventors: Kiyofumi ABE, Takahiro NISHI, Tadamasa TOMA, Ryuichi KANOH
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Patent number: 11689739Abstract: An encoder includes memory and circuitry configured to determine a merge mode to be applied to a current block, wherein the merge mode includes a sub-block merge mode and a first merge mode. In the merge mode, inter-prediction parameters are inferred from a neighboring block neighboring the current block. In the sub-block merge mode, the current block includes a plurality of sub-blocks, and inter-prediction parameters are provided for each of the plurality of sub-blocks. When the merge mode is determined to be the first merge mode, the circuitry generates a prediction image for the current block by performing a bi-directional optical flow prediction process, wherein the bi-directional optical flow prediction process uses a spatial gradient for the current block. When the merge mode is determined to be the sub-block merge mode, the circuitry generates a prediction image for the current block by not performing the bi-directional optical flow prediction process.Type: GrantFiled: July 29, 2021Date of Patent: June 27, 2023Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Ryuichi Kanoh
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Patent number: 11683492Abstract: Various embodiments provide an encoder that performs an up-conversion and a down-conversion on a first quantization matrix to generate a second quantization matrix, and quantizes transform coefficients of a current block using the second quantization matrix. The first quantization matrix has a first number of rows and a first number of columns equal to the first number of rows, and the second quantization matrix has a second number of rows and a second number of columns different from the second number of rows. In the up-conversion, the circuitry generates the second quantization matrix such that one of the second number of rows or the second number of columns is larger than the first number of rows. In the down-conversion, the circuitry generates the second quantization matrix such that the other of the second number of rows or the second number of columns is smaller than the first number of rows.Type: GrantFiled: August 9, 2022Date of Patent: June 20, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Kiyofumi Abe, Ryuichi Kanoh, Takahiro Nishi, Tadamasa Toma
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Patent number: 11677949Abstract: Various embodiments provide an encoder that performs an up-conversion and a down-conversion on a first quantization matrix to generate a second quantization matrix, and quantizes transform coefficients of a current block using the second quantization matrix. The first quantization matrix has a first number of rows and a first number of columns equal to the first number of rows, and the second quantization matrix has a second number of rows and a second number of columns different from the second number of rows. In the up-conversion, the circuitry generates the second quantization matrix such that one of the second number of rows or the second number of columns is larger than the first number of rows. In the down-conversion, the circuitry generates the second quantization matrix such that the other of the second number of rows or the second number of columns is smaller than the first number of rows.Type: GrantFiled: August 10, 2022Date of Patent: June 13, 2023Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Kiyofumi Abe, Ryuichi Kanoh, Takahiro Nishi, Tadamasa Toma
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Patent number: 11677975Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry, in inter prediction processing: derives a first motion vector of a current block to be processed, using a motion vector of a previous block which has been previously processed; derives a second motion vector of the current block by performing motion estimation in the vicinity of the first motion vector; and generates a prediction image of the current block by performing motion compensation using the second motion vector.Type: GrantFiled: August 25, 2022Date of Patent: June 13, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Kiyofumi Abe, Takahiro Nishi, Tadamasa Toma, Ryuichi Kanoh, Takashi Hashimoto
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Patent number: 11671593Abstract: An encoder includes processing circuitry and memory. Using the memory, the processing circuitry: encodes and reconstructs an image to generate a reconstructed image; determines, according to a characteristic of a block in the reconstructed image, an interpolation method for interpolating pixels located outside a referable region including the block; interpolates the pixels located outside the referable region, using the interpolation method determined; and applies a filter to the block using the pixels interpolated.Type: GrantFiled: September 29, 2021Date of Patent: June 6, 2023Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Ryuichi Kanoh, Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Takashi Hashimoto
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Patent number: 11671617Abstract: An encoder is an encoder that encodes a block in a picture using a prediction image of the block, and includes circuitry and memory. Using the memory, the circuitry: calculates a first average pixel value which is an average pixel value of first reference samples out of the first reference samples and second reference samples, The first reference samples are referable and located outside the block and adjacent to a first side of the block. The second reference samples are referable and located outside the block and adjacent to a second side of the block. When generating the prediction image, the circuitry applies the same prediction pixel value to inner samples among current samples to be processed that are included in the block. The inner samples constitute a quadrilateral region including at least two current samples in each of a horizontal direction and a vertical direction.Type: GrantFiled: May 31, 2022Date of Patent: June 6, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICAInventors: Virginie Drugeon, Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Ryuichi Kanoh
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Publication number: 20230171423Abstract: The present disclosure provides systems and methods for video coding. The systems include, for example, an image encoder comprising: circuitry; and a memory coupled to the circuitry, wherein the circuitry, in operation, performs the following: predicting a first block of prediction samples for a current block of a picture, wherein predicting the first block of prediction samples includes at least a prediction process with a motion vector from a different picture; padding the first block of prediction samples to form a second block of prediction samples, wherein the second block is larger than the first block; calculating at least a gradient using the second block of prediction samples; and encoding the current block using at least the calculated gradient.Type: ApplicationFiled: January 31, 2023Publication date: June 1, 2023Inventors: Kiyofumi ABE, Takahiro NISHI, Tadamasa TOMA, Ryuichi KANOH, Chong Soon LIM, Ru Ling LIAO, Hai Wei SUN, Sughosh Pavan SHASHIDHAR, Han Boon TEO, Jing Ya LI