Patents by Inventor Shunichi Sekiguchi

Shunichi Sekiguchi 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).

  • Publication number: 20160309147
    Abstract: When carrying out an average prediction, an intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor also sets a filter coefficient to ¾, associated with the intermediate prediction value for a target pixel at the left end of the block other than the target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with the adjacent pixel adjacent to the left side of the target pixel at the left end of the block. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Application
    Filed: June 24, 2016
    Publication date: October 20, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akira MINEZAWA, Kazuo SUGIMOTO, Shunichi SEKIGUCHI
  • Patent number: 9462271
    Abstract: When generating a prediction image of a color difference signal, an intra prediction unit 4 carries out an intra prediction process on a target block to be encoded of a color difference signal by using the same intra prediction parameter as that which the intra prediction unit 4 uses when carrying out an intra prediction process on a target block to be encoded of a luminance signal, or carries out the intra prediction process on the target block to be encoded of the color difference signal by applying an average prediction to the target block to be encoded. A variable length encoding unit 13 variable-length-encodes a flag showing whether the intra prediction unit 4 uses the same intra prediction parameter as that used for the luminance signal.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: October 4, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshimi Moriya, Shunichi Sekiguchi, Kazuo Sugimoto, Ryoji Hattori
  • Publication number: 20160234523
    Abstract: A variable length encoder 23 multiplexes hint information into an entire region bitstream, the hint information including motion vector limitation information indicating a maximum range in which a search for a motion vector can be performed, GOP size limitation information indicating a GOP size which is the number of pictures belonging to a GOP, and reference configuration specification information indicating a picture to be referred to at the time of decoding each picture belonging to the GOP. As a result, a bitstream of the entire region which is suitable for efficient generation, with a low operation amount, of a bitstream of a partial region can be generated without causing a reduction in the compression efficiency of the bitstream of the entire region.
    Type: Application
    Filed: September 5, 2014
    Publication date: August 11, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryoji HATTORI, Yoshimi MORIYA, Akira MINEZAWA, Kazuyuki MIYAZAWA, Shunichi SEKIGUCHI
  • Patent number: 9414073
    Abstract: When carrying out an average prediction, an intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor also sets a filter coefficient to ¾, associated with the intermediate prediction value for a target pixel at the left end of the block other than the target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with the adjacent pixel adjacent to the left side of the target pixel at the left end of the block. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: August 9, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Minezawa, Kazuo Sugimoto, Shunichi Sekiguchi
  • Patent number: 9380306
    Abstract: A moving image decoding apparatus and method for decoding an encoded bit stream. The encoded bit stream is obtained by dividing a moving image into rectangular regions and coding the rectangular regions as units. The apparatus includes a rectangular region size decoder, a rectangular region size determiner, a coding mode decoder, and a rectangular region decoder.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: June 28, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshimi Moriya, Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Patent number: 9369730
    Abstract: When an encoding mode corresponding to one of blocks to be encoded into which an image is divided by a block dividing part 2 is an inter encoding mode which is a direct mode, a motion-compensated prediction part 5 selects a motion vector suitable for generation of a prediction image from one or more selectable motion vectors and also carries out a motion-compensated prediction process on the block to be encoded to generate a prediction image by using the motion vector, and outputs index information showing the motion vector to a variable length encoding part 13, and the variable length encoding unit 13 variable-length-encodes the index information.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: June 14, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yusuke Itani, Shunichi Sekiguchi, Kazuo Sugimoto
  • Publication number: 20160156931
    Abstract: When carrying out an average prediction, an intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor also sets a filter coefficient to ¾, associated with the intermediate prediction value for a target pixel at the upper end of the block other than the target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with the adjacent pixel adjacent to the upper side of the target pixel at the upper end of the block. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 2, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira MINEZAWA, Kazuo SUGIMOTO, Shunichi SEKIGUCHI
  • Publication number: 20160156929
    Abstract: When carrying out an average prediction, an intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor also sets a filter coefficient to ½, associated with the intermediate prediction value for a target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with an adjacent pixel adjacent to an upper side or a left side of the target pixel. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 2, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira MINEZAWA, Kazuo SUGIMOTO, Shunichi SEKIGUCHI
  • Publication number: 20160156930
    Abstract: When carrying out an average prediction, the intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor sets a filter coefficient to ½, associated with the intermediate prediction value for a target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with an adjacent pixel adjacent to an upper side or a left side of the target pixel. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 2, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira MINEZAWA, Kazuo SUGIMOTO, Shunichi SEKIGUCHI
  • Publication number: 20160112706
    Abstract: When carrying out an average prediction, an intra predictor carries out a filtering process on target pixels of the intra prediction located at an upper end and a left end of the block, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel. The intra predictor also sets a filter coefficient to ¾, associated with the intermediate prediction value for a target pixel at the left end of the block other than the target pixel at an upper left corner of the block, and sets a filter coefficient to ¼, associated with the adjacent pixel adjacent to the left side of the target pixel at the left end of the block. As a result, prediction errors locally occurring can be reduced, and the image quality can be improved.
    Type: Application
    Filed: December 21, 2015
    Publication date: April 21, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akira Minezawa, Kazuo Sugimoto, Shunichi Sekiguchi
  • Publication number: 20160094860
    Abstract: An image encoding device includes an encoder that encodes a first field of a specific frame as an intra picture which is predicted by using only an ultra prediction, and that encodes the first field of the above-described specific frame, a second field of the above-described specific frame, a picture whose encoding order is later than that of the first field of the above-described specific frame later and whose display order is earlier than that of the first field, and another picture whose encoding order and also display order are later than those of the first field of the above-described specific frame in order of those pictures, and a multiplexer that multiplexes information showing that the first field of the above-described specific frame is a picture, in a bitstream, at which decoding can be started into the above-described bitstream.
    Type: Application
    Filed: June 11, 2014
    Publication date: March 31, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akira MINEZAWA, Ryoji HATTORI, Kazuyuki MIYAZAWA, Yoshimi MORIYA, Shunichi SEKIGUCHI
  • Patent number: 9299133
    Abstract: An image encoding device includes an intra predictor for, when a coding mode corresponding to one of coding blocks into which an inputted image is divided is an intra coding mode, carrying out an intra-frame prediction process on each block which is a unit for prediction of the coding block to generate a prediction image; and an encoder for encoding coding mode information and an intra prediction parameter indicating an average prediction. When the intra predictor carries out the average prediction, the intra predictor carries out a filtering process only on a target pixel of the intra prediction located at an upper end or a left end of the bock, the filtering process using an intermediate prediction value, which is an average value of adjacent pixels of the block, and at least one adjacent pixel of the target pixel.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: March 29, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Minezawa, Kazuo Sugimoto, Shunichi Sekiguchi
  • Publication number: 20160050421
    Abstract: When the signal format of a color image is YUV4:2:2, and an intra prediction parameter, which is used for an intra-frame prediction process on the chrominance signals in a prediction block, shows the same prediction mode as an intra prediction mode for the luminance signal in the prediction block, an intra prediction unit 4 converts an index indicating the intra prediction mode for the luminance signal, and performs the intra-frame prediction process on the chrominance signals in an intra prediction mode indicated by the index after conversion.
    Type: Application
    Filed: April 4, 2014
    Publication date: February 18, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akira MINEZAWA, Ryoji HATTORI, Takayuki SEMITSU, Yoshimi MORIYA, Norimichi HIWASA, Shunichi SEKIGUCHI
  • Publication number: 20160021379
    Abstract: A variable length encoding unit 13 variable-length-encodes an index indicating a classification method of carrying out a class classification on each coding block having a largest size, the classification method being determined by a loop filter unit 11, and also variable-length-encodes a parameter about an offset value for each class determined for each coding block having the largest size on the basis of a binarization process using a truncated unary code.
    Type: Application
    Filed: April 3, 2013
    Publication date: January 21, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akira MINEZAWA, Kazuo SUGIMOTO, Norimichi HIWASA, Shunichi SEKIGUCHI
  • Patent number: 9232198
    Abstract: 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: Grant
    Filed: October 31, 2007
    Date of Patent: January 5, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami, Hirofumi Nishikawa, Shinichi Kuroda, Yoshimi Isu, Yuri Hasegawa
  • Patent number: 9225945
    Abstract: 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: Grant
    Filed: October 31, 2007
    Date of Patent: December 29, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Sekiguchi, Kohtaro Asai, Tokumichi Murakami, Hirofumi Nishikawa, Shinichi Kuroda, Yoshimi Isu, Yuri Hasegawa
  • Patent number: 9210426
    Abstract: 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: Grant
    Filed: June 5, 2012
    Date of Patent: December 8, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shunichi Sekiguchi, Kazuo Sugimoto, Hiroharu Sakate, Tokumichi Murakami, Akira Minezawa
  • Publication number: 20150319463
    Abstract: 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: Application
    Filed: May 8, 2015
    Publication date: November 5, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Hiroharu SAKATE, Tokumichi MURAKAMI, Akira MINEZAWA
  • Publication number: 20150304677
    Abstract: An image encoding device include a predicting unit for adaptively determining the size of each motion prediction unit block according to color component signals, and for dividing each motion prediction unit block into motion vector allocation regions to search for a motion vector, and a variable length encoding unit for, when a motion vector is allocated to the whole of each motion prediction unit block, performing encoding in mc_skip mode if the motion vector is equal to an estimated vector and a prediction error signal does not exist, and for, when each motion vector allocation region has a size equal to or larger than a predetermined size and a motion vector is allocated to the whole of each motion vector allocation region, performing encoding in sub_mc_skip mode if the motion vector is equal to an estimated vector and a prediction error signal does not exist.
    Type: Application
    Filed: February 19, 2015
    Publication date: October 22, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shunichi SEKIGUCHI, Kazuo SUGIMOTO, Yusuke ITANI, Akira MINEZAWA, Yoshiaki KATO
  • Publication number: 20150281725
    Abstract: When an encoding mode corresponding to one of blocks to be encoded into which an image is divided by a block dividing part 2 is an inter encoding mode which is a direct mode, a motion-compensated prediction part 5 selects a motion vector suitable for generation of a prediction image from one or more selectable motion vectors and also carries out a motion-compensated prediction process on the block to be encoded to generate a prediction image by using the motion vector, and outputs index information showing the motion vector to a variable length encoding part 13, and the variable length encoding unit 13 variable-length-encodes the index information.
    Type: Application
    Filed: February 4, 2015
    Publication date: October 1, 2015
    Inventors: Yusuke ITANI, Shunichi SEKIGUCHI, Kazuo SUGIMOTO