Patents by Inventor Tokumichi Murakami
Tokumichi Murakami 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: 20180139452Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: ApplicationFiled: January 11, 2018Publication date: May 17, 2018Applicant: Mitsubishi Electric CorporationInventors: Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Hiroharu SAKATE, Tokumichi MURAKAMI, Akira MINEZAWA
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Patent number: 9973753Abstract: An encoding controlling unit 3 selects one transformation block size which provides an optimal degree of encoding efficiency from a set of transformation block sizes which are determined in accordance with an encoding mode 7, and includes the transformation block size selected thereby in optimal compression parameters 20a to notify the transformation block size to a transformation/quantization unit 19, and the transformation/quantization unit 19 divides an optimal prediction differential signal 13a into blocks having the transformation block size included in the optimal compression parameters 20a, and carries out a transformation and quantization process on each of the blocks to generate compressed data 21.Type: GrantFiled: February 27, 2017Date of Patent: May 15, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshimi Moriya, Shunichi Sekiguchi, Kazuo Sugimoto, Kohtaro Asai, Tokumichi Murakami
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Patent number: 9906795Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: GrantFiled: April 5, 2017Date of Patent: February 27, 2018Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shunichi Sekiguchi, Kazuo Sugimoto, Hiroharu Sakate, Tokumichi Murakami, Akira Minezawa
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Publication number: 20170244971Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: ApplicationFiled: April 5, 2017Publication date: August 24, 2017Applicant: Mitsubishi Electric CorporationInventors: Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Hiroharu SAKATE, Tokumichi MURAKAMI, Akira MINEZAWA
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Publication number: 20170171543Abstract: An encoding controlling unit 3 selects one transformation block size which provides an optimal degree of encoding efficiency from a set of transformation block sizes which are determined in accordance with an encoding mode 7, and includes the transformation block size selected thereby in optimal compression parameters 20a to notify the transformation block size to a transformation/quantization unit 19, and the transformation/quantization unit 19 divides an optimal prediction differential signal 13a into blocks having the transformation block size included in the optimal compression parameters 20a, and carries out a transformation and quantization process on each of the blocks to generate compressed data 21.Type: ApplicationFiled: February 27, 2017Publication date: June 15, 2017Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshimi MORIYA, Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Kohtaro ASAI, Tokumichi MURAKAMI
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Patent number: 9654773Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: GrantFiled: May 8, 2015Date of Patent: May 16, 2017Assignee: Mitsubishi Electric CorporationInventors: Shunichi Sekiguchi, Kazuo Sugimoto, Hiroharu Sakate, Tokumichi Murakami, Akira Minezawa
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Patent number: 9503718Abstract: Disclosed is an image decoding method including a step of variable-length-decoding coded data multiplexed into a bitstream to acquire compressed data associated with a coding block, a reference image restriction flag indicating whether or not to restrict a significant reference image area which is an area on a reference image which can be used for the motion-compensated prediction, and motion information and a motion-compensated prediction step of carrying out a motion-compensated prediction process on the coding block on the basis of the motion information to generate a prediction image, in which the motion-compensated prediction step includes a step of when the prediction image includes a pixel located outside the significant reference image area, carrying out a predetermined extending process to generate the prediction image on the basis of the reference image restriction flag by using the motion information.Type: GrantFiled: June 11, 2012Date of Patent: November 22, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke Itani, Shunichi Sekiguchi, Kazuo Sugimoto, Tokumichi Murakami
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Patent number: 9232198Abstract: A method and system for predicting a moving picture to be implemented in an encoder is provided. The system includes a plurality of reference picture memory areas for storing reference pictures to be used for prediction and a prediction generation section that includes a motion compensator and memory updater. The motion compensator receives a parameter representing the motion between an image to be predicted and a reference picture stored in the reference picture memory area and a parameter representing the reference picture memory area to be used for prediction, and generates a predicted image by using the reference picture stored in the reference picture memory area indicated by the parameter representing the reference picture memory area. The memory updater carries out dynamic allocation of reference picture memory areas required for prediction and judges whether to store new reference pictures additionally.Type: GrantFiled: October 31, 2007Date of Patent: January 5, 2016Assignee: Mitsubishi Electric CorporationInventors: Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami, Hirofumi Nishikawa, Shinichi Kuroda, Yoshimi Isu, Yuri Hasegawa
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Patent number: 9225945Abstract: A moving picture encoder and encoding method for encoding a moving picture signal are disclosed. The moving picture encoder includes a plurality of reference picture memory areas, each area storing picture data of a reference picture to be used for prediction; and a prediction picture generator including a motion compensator that generates the predicted picture by using the picture data stored in the reference picture memory area, a parameter representing a motion between an image to be predicted and the reference picture and prediction mode information indicating a prediction mode corresponding to a prediction method used for generating a predicted picture, and a memory updater that controls a timing of updating the picture data of a full frame stored in the reference picture memory area; and a multiplexer that multiplexes an information representing memory update in a bitstream.Type: GrantFiled: October 31, 2007Date of Patent: December 29, 2015Assignee: Mitsubishi Electric CorporationInventors: Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami, Hirofumi Nishikawa, Shinichi Kuroda, Yoshimi Isu, Yuri Hasegawa
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Patent number: 9210426Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: GrantFiled: June 5, 2012Date of Patent: December 8, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shunichi Sekiguchi, Kazuo Sugimoto, Hiroharu Sakate, Tokumichi Murakami, Akira Minezawa
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Publication number: 20150319463Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: ApplicationFiled: May 8, 2015Publication date: November 5, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Hiroharu SAKATE, Tokumichi MURAKAMI, Akira MINEZAWA
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Publication number: 20150043630Abstract: An image decoding device and an image decoding method are disclosed. The decoding device includes: a variable length decoder to variable-length-decode an inputted encoded bit stream to obtain a parameter for prediction signal generation, a compressed difference image, and filters; and a filtering processor to carry out a filtering process on a decoded image acquired by adding a prediction image and a difference image, wherein the prediction image is generated by using the parameter for prediction signal generation, and the difference image is acquired by decoding the compressed difference image, wherein the variable length decoder variable-length-decodes class identification information for a block in the decoded image, and wherein the filtering processor refers to the class identification information for the block to determine a class for the block, and carries out a filtering process on the block based on the determined class and the filters.Type: ApplicationFiled: October 15, 2014Publication date: February 12, 2015Applicant: Mitsubishi Electric CorporationInventors: Akira MINEZAWA, Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Yusuke ITANI, Yoshimi MORIYA, Norimichi HIWASA, Shuichi YAMAGISHI, Yoshihisa YAMADA, Yoshiaki KATO, Kohtaro ASAI, Tokumichi MURAKAMI
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Publication number: 20150023420Abstract: A loop filter unit 11 carries out a class classification of a local decoded image generated by an adding unit 9 into one class for each coding block having a largest size determined by an encoding controlling unit 2 and also designs a filter that compensates for a distortion piggybacked for each local decoded image belonging to each class, and also carries out a filtering process on the above-mentioned local decoded image by using the filter. A variable length encoding unit 13 encodes, as filter parameters, the filter designed by the loop filter unit 11 and used for the local decoded image belonging to each class, and a class number of each largest coding block.Type: ApplicationFiled: January 9, 2013Publication date: January 22, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Akira Minezawa, Kazuo Sugimoto, Kazuyuki Miyazawa, Yusuke Itani, Ryoji Hattori, Yoshimi Moriya, Norimichi Hiwasa, Shunichi Sekiguchi, Tokumichi Murakami
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Patent number: 8718139Abstract: An image decoding device method for obtaining image signals by decoding compressed data of digital moving image signals in a 4:4:4 format is disclosed. An identification signal is decoded, the identification signal indicating whether three color component signals have been encoded in a common encoding mode or in independent encoding modes. The common encoding mode corresponds to a process of encoding the three color component signals of one frame by a common macroblock type information and the independent encoding mode corresponds to a process of encoding the three color component signals of one frame by an individual independent macroblock type information. The three color component signals are decoded in a common encoding mode or in independent encoding modes according to the identification signal.Type: GrantFiled: October 29, 2007Date of Patent: May 6, 2014Assignee: Mitsubishi Electric CorporationInventors: Yoshihisa Yamada, Shunichi Sekiguchi, Yoshimi Moriya, Kazuo Sugimoto, Yuichi Idehara, Kohtaro Asai, Tokumichi Murakami
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Patent number: 8655087Abstract: There are provided an encoding device, a decoding device, an encoding method, and a decoding method that enhance optimality in a case of encoding moving image signals having no sample ratio distinction between color components such as a 4:4:4 format. In a case of conducting compression encoding by inputting digital moving image signals of the 4:4:4 format, there are prepared a first encoding process of encoding three color component signals of the input moving image signals in a common encoding mode, and a second encoding process of encoding the three color component signals of the input moving image signals in respective independent encoding modes. The encoding process is executed by selecting any one of the first encoding process and the second encoding process, and the compression data contains an identification signal for specifying which process is selected.Type: GrantFiled: October 29, 2007Date of Patent: February 18, 2014Assignee: Mitsubishi Electric CorporationInventors: Yoshihisa Yamada, Shunichi Sekiguchi, Yoshimi Moriya, Kazuo Sugimoto, Yuichi Idehara, Kohtaro Asai, Tokumichi Murakami
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Publication number: 20140044369Abstract: When removing a block distortion occurring in a local decoded image, a loop filtering part 11 of an image coding device carries out a filtering process on each of signal components (a luminance signal component and color difference signal components) after setting the intensity of a filter for removing the block distortion for each of the signal components according to a coding mode (an intra coding mode or an inter coding mode) selected by a coding controlling part 1.Type: ApplicationFiled: June 5, 2012Publication date: February 13, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shunichi Sekiguchi, Kazuo Sugimoto, Hiroharu Sakate, Tokumichi Murakami, Akira Minezawa
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Publication number: 20130343460Abstract: Disclosed is an image decoding method including a step of variable-length-decoding coded data multiplexed into a bitstream to acquire compressed data associated with a coding block, a reference image restriction flag indicating whether or not to restrict a significant reference image area which is an area on a reference image which can be used for the motion-compensated prediction, and motion information and a motion-compensated prediction step of carrying out a motion-compensated prediction process on the coding block on the basis of the motion information to generate a prediction image, in which the motion-compensated prediction step includes a step of when the prediction image includes a pixel located outside the significant reference image area, carrying out a predetermined extending process to generate the prediction image on the basis of the reference image restriction flag by using the motion information.Type: ApplicationFiled: June 11, 2012Publication date: December 26, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke Itani, Shunichi Sekiguchi, Kazuo Sugimoto, Tokumichi Murakami
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Patent number: 8553772Abstract: To achieve an encoding system including a highly efficient prediction performed in response to the content of a scene, a significance, and a motion characteristic of a moving picture and the like, a reference memory, a motion compensator receiving a parameter representing the motion of a prediction picture segment for generating a predicted picture by using arbitrary data stored in the memory based upon the parameter, and memory update unit that updates picture data in memory and controls the capacity of the memory, are provided.Type: GrantFiled: January 20, 2004Date of Patent: October 8, 2013Assignee: Mitsubishi Electric CorporationInventors: Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami, Hirofumi Nishikawa, Shinichi Kuroda, Yoshimi Isu, Yuri Hasegawa
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Patent number: RE44663Abstract: An image coding apparatus which includes a frame memory selecting unit (35) for selecting, in response to a selection signal, an image to be continuously stored in a plurality of frame memories (9, 10) as a background image and storing the background image into the plurality of frame memories (9, 10), and a background motion compensating unit (14, 39) for performing motion compensating prediction corresponding to an input image based on the background image to generate a predicted image based on the motion compensating prediction, and an image decoding apparatus corresponding to the image coding apparatus.Type: GrantFiled: April 30, 2004Date of Patent: December 24, 2013Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takahiro Fukuhara, Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami
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Patent number: RE44692Abstract: An image coding apparatus which includes a frame memory selecting unit (35) for selecting, in response to a selection signal, an image to be continuously stored in a plurality of frame memories (9, 10) as a background image and storing the background image into the plurality of frame memories (9, 10), and a background motion compensating unit (14, 39) for performing motion compensating prediction corresponding to an input image based on the background image to generate a predicted image based on the motion compensating prediction, and an image decoding apparatus corresponding to the image coding apparatus.Type: GrantFiled: July 18, 2007Date of Patent: January 7, 2014Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takahiro Fukuhara, Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami