Patents by Inventor Kohtaro Asai

Kohtaro Asai 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).

  • Patent number: 8036278
    Abstract: An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a second coding scheme in accordance with header information in a first coding scheme, and a decoder for decoding image coded data in the first coding scheme in response to the header information on the second coding scheme, which is set.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: October 11, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshimi Isu, Shunichi Sekiguchi, Kohtaro Asai, Hirofumi Nishikawa, Shinichi Kuroda, Yuri Hasegawa
  • Patent number: 8031781
    Abstract: An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a second coding scheme in accordance with header information in a first coding scheme, and a decoder for decoding image coded data in the first coding scheme in response to the header information on the second coding scheme, which is set.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: October 4, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yoshimi Isu, Shunichi Sekiguchi, Kohtaro Asai, Hirofumi Nishikawa, Shinichi Kuroda, Yuri Hasegawa
  • Patent number: 8005143
    Abstract: An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a second coding scheme in accordance with header information in a first coding scheme, and a decoder for decoding image coded data in the first coding scheme in response to the header information on the second coding scheme, which is set.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: August 23, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshimi Isu, Shunichi Sekiguchi, Kohtaro Asai, Hirofumi Nishikawa, Shinichi Kuroda, Yuri Hasegawa
  • Patent number: 8000494
    Abstract: A digital watermark detecting device includes an extracting unit to extract pixels embedded as a digital watermark from an input image and to output an extracted pixel value row, a generating unit to generate a set of orthogonal patterns, a detecting unit to calculate a correlation using an integration result of the orthogonal patterns and the extracted pixel value row, to determine detected values corresponding to the orthogonal patterns and a standard deviation for detected values excluding a maximum detected value with a maximum absolute value from the calculated detected values, to calculate a quotient by dividing the maximum detected value by the standard deviation, a discriminating unit to output information corresponding to the result of comparison between a threshold parameter and the quotient, and a unit to convert the detected value inputted from the detecting unit into predetermined information, when the reliability of the detected values satisfies a standard.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: August 16, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Magai, Hiroshi Ito, Ryousuke Fujii, Mitsuyoshi Suzuki, Kohtaro Asai, Tokumichi Murakami
  • Patent number: 7994951
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: August 9, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Patent number: 7991237
    Abstract: An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: August 2, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shunichi Sekiguchi, Shuichi Yamagishi, Yoshimi Moriya, Yoshihisa Yamada, Kohtaro Asai, Tokumichi Murakami, Yuichi Idehara
  • Patent number: 7970217
    Abstract: A coded bit stream generated on a coding side consists of a VO header, a VOL header, a GOV header, a VOP header and VOP data, and the VOL header multiplexes an object intra-coded indicator signal indicating whether all the VOP data contained in a VOL or GOV are intra coded or not. This enables a decoding side to recognize whether all the VOP data contained in the VOL or GOV in the coded bit stream are intra coded or not by only analyzing the object intra-coded indicator signal. This can facilitate such processings as frame skip control or random access of the VOPs.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: June 28, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuri Hasegawa, Shunichi Sekiguchi, Shinichi Kuroda, Kohtaro Asai, Hirofumi Nishikawa, Yoshimi Isu
  • Publication number: 20110148674
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: January 5, 2011
    Publication date: June 23, 2011
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20110142061
    Abstract: Packet in a multimedia stream has and associated standard priority level specified by standard protocols. The standard priority level in input packets received by a home gateway is converted to a harmonized priority level. Then, the input packets are processed in the home gateway according to the harmonized priority level, and converted from the harmonized priority level to the standard priority level in corresponding output packets after the processing.
    Type: Application
    Filed: December 15, 2009
    Publication date: June 16, 2011
    Inventors: Yige Wang, Kohtaro Asai, Shin Miura
  • Publication number: 20110129016
    Abstract: Provided are a device and a method for efficiently compressing information by performing improved removal of signal correlations according to statistical and local properties of a video signal in a 4:4:4 format which is to be encoded. The device includes: a prediction unit for determining, for each color component, a motion prediction mode exhibiting a highest efficiency among a plurality of motion prediction modes, and detecting a motion vector corresponding to the determined motion prediction mode, to thereby perform output; and a variable-length encoding unit for determining, when performing arithmetic coding on the motion prediction mode of the each color component, an occurrence probability of a value of the motion prediction mode of the each color component based on a motion prediction mode selected in a spatially-adjacent unit region and a motion prediction mode selected in a temporally-adjacent unit region, to thereby perform the arithmetic coding.
    Type: Application
    Filed: July 3, 2009
    Publication date: June 2, 2011
    Inventors: Shunichi Sekiguchi, Shuichi Yamagishi, Yusuke Itani, Yoshihisa Yamada, Yoshiaki Kato, Kohtaro Asai, Tokumichi Murakami
  • Publication number: 20110115656
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: January 5, 2011
    Publication date: May 19, 2011
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20110102213
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: January 10, 2011
    Publication date: May 5, 2011
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20110102210
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: January 10, 2011
    Publication date: May 5, 2011
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20110095922
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: January 5, 2011
    Publication date: April 28, 2011
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Patent number: 7928869
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: April 19, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20110032991
    Abstract: To provide a method of efficiently compressing information by performing improved removal of signal correlations according to statistical and local properties of a video signal in a 4:4:4 format which is to be encoded, an image encoding device for dividing each picture of a digital video signal into predetermined unit regions, and carrying out, for each of the predetermined unit regions, compression encoding using a motion compensation prediction includes: a prediction unit for searching for a motion vector based on virtual-pixel-accuracy specification information for specifying an upper limit of an accuracy of a pixel position indicated by the motion vector, and generating, based on the motion vector that is searched for, a motion-compensation predicted image; and an encoding unit for multiplexing the virtual-pixel-accuracy specification information with a bit stream, and multiplexing, based on a magnitude of the motion vector that is searched for and a magnitude of a motion vector used for prediction of the
    Type: Application
    Filed: January 8, 2009
    Publication date: February 10, 2011
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Shunichi Sekiguchi, Kenji Otoi, Yuichi Idehara, Yoshihisa Yamada, Kohtaro Asai, Tokumichi Murakami
  • Patent number: 7876818
    Abstract: Multiplexing means of an image encoding device multiplexes object display speed information or image display absolute time information, and an image decoding device performs image processing on the basis of the multiplexed object display speed information or image display absolute time information, whereby image decoding process can be performed smoothly and accurately.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: January 25, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinichi Kuroda, Shunichi Sekiguchi, Kohtaro Asai, Hirofumi Nishikawa, Yoshimi Isu, Yuri Hasegawa
  • Patent number: 7859438
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: December 28, 2010
    Assignee: Mitsubihsi Denki Kabushiki Kaisha
    Inventors: Shunichi Sekiguchi, Yoshihisa Yamada, Kohtaro Asai
  • Publication number: 20100315270
    Abstract: In a bit stream syntax containing compressed video slice data for compressed video data of a slice structure, a slice header for compressed video slice data has attached thereto a slice start code, a register reset flag indicating whether a register value, which designates a status of a codeword occurring in an arithmetic coding process, should be reset in the next transmission unit, an initial register value which indicates a register value to be used to start arithmetic coding/decoding to build/decompose the next transmission unit, only when the register reset flag indicates that the register should not be reset.
    Type: Application
    Filed: August 24, 2010
    Publication date: December 16, 2010
    Inventors: Shunichi SEKIGUCHI, Yoshihisa YAMADA, Kohtaro ASAI
  • Patent number: RE42185
    Abstract: When a retrieval condition of an attribute list is input from a user interface unit to a retrieval processing unit, the attribute list stored in an attribute list storing unit is retrieved in the retrieval processing unit. Thereafter, attribute information conforming to the retrieval condition is output to and displayed on a displaying unit. Thereafter, when a retrieval condition of the similarity retrieval is input from the user interface unit to the retrieval processing unit, image data stored in the image information storing unit is retrieved in the retrieval processing unit, and specific image data relating to a characteristic descriptor set conforming to the retrieval condition is selected in the retrieval processing unit. Thereafter, the specific image data is output to and displayed on the displaying unit.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: March 1, 2011
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shunichi Sekiguchi, Yoshimi Isu, Hirofumi Nishikawa, Yoshihisa Yamada, Kohtaro Asai