Patents by Inventor Kazunori Oniki
Kazunori Oniki 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: 20060250397Abstract: A device for controlling the table capacity smaller comprises a table of logarithms and a table of exponents preserving values of a logarithmic function and exponential function with a base of the second power, a multiplier, a shift unit for shifting the input value by a proper integer when the domain of logarithm is not included in the input value range of the table of logarithms, a logarithm addition unit for adding the shift amount to the value referred to in the table of logarithms, an exponent subtraction unit for subtracting a proper integer L from the input value when the domain of the exponential function is not included in the input value range of the table of exponents, and an exponent shift unit for shifting the referred value in the table of exponents the subtraction amount. A high-speed processing unit comprises a converter for converting floating-point data to fixed-point data having a bit of decimal point.Type: ApplicationFiled: July 12, 2006Publication date: November 9, 2006Inventors: Yuichi Abe, Ryo Fujita, Katsunori Suzuki, Kazuhisa Takami, Kazunori Oniki
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Patent number: 6756981Abstract: A graphics processor comprises: a light source table holding light source data; a conversion unit for converting the light source data to be set in the light source table from a float type (single-precision floating point real number type) into an int type (integer type); an inner product calculation unit for calculating the inner products of normal directions, light source directions and sight line directions at the vertices based on the light source data; and a color calculation unit for performing light source computations based on the calculated inner products to determine the colors of the vertices.Type: GrantFiled: August 20, 2002Date of Patent: June 29, 2004Assignee: Hitachi, Ltd.Inventors: Katsunori Suzuki, Ryo Fujita, Kazuyoshi Koga, Yuichi Abe, Mitsuru Soga, Kazuhisa Takami, Koyo Katsura, Hideki Fujii, Kazunori Oniki
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Publication number: 20030163502Abstract: A device for controlling the table capacity smaller comprises a table of logarithms and a table of exponents preserving values of a logarithmic function and exponential function with a base of the second power, a multiplier, a shift unit for shifting the input value by a proper integer when the domain of logarithm is not included in the input value range of the table of logarithms, a logarithm addition unit for adding the shift amount to the value referred to in the table of logarithms, an exponent subtraction unit for subtracting a proper integer L from the input value when the domain of the exponential function is not included in the input value range of the table of exponents, and an exponent shift unit for shifting the referred value in the table of exponents the subtraction amount. A high-speed processing unit comprises a converter for converting floating-point data to fixed-point data having a bit of decimal point.Type: ApplicationFiled: March 19, 2003Publication date: August 28, 2003Applicant: Hitachi, Ltd.Inventors: Yuichi Abe, Ryo Fujita, Katsunori Suzuki, Kazuhisa Takami, Kazunori Oniki
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Publication number: 20020196254Abstract: A graphics processor comprises: a light source table holding light source data; a conversion unit for converting the light source data to be set in the light source table from a float type (single-precision floating point real number type) into an int type (integer type); an inner product calculation unit for calculating the inner products of normal directions, light source directions and sight line directions at the vertices based on the light source data; and a color calculation unit for performing light source computations based on the calculated inner products to determine the colors of the vertices.Type: ApplicationFiled: August 20, 2002Publication date: December 26, 2002Applicant: Hitachi, Ltd.Inventors: Katsunori Suzuki, Ryo Fujita, Kazuyoshi Koga, Yuichi Abe, Mitsuru Soga, Kazuhisa Takami, Koyo Katsura, Hideki Fujii, Kazunori Oniki
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Patent number: 6118453Abstract: A graphics processor comprises: a light source table holding light source data; a conversion unit for converting the light source data to be set in the light source table from a float type (single-precision floating point real number type) into an int type (integer type); an inner product calculation unit for calculating the inner products of normal directions, light source directions and sight line directions at the vertices based on the light source data; and a color calculation unit for performing light source computations based on the calculated inner products to determine the colors of the vertices.Type: GrantFiled: December 19, 1996Date of Patent: September 12, 2000Assignee: Hitachi, Ltd.Inventors: Katsunori Suzuki, Ryo Fujita, Kazuyoshi Koga, Yuichi Abe, Mitsuru Soga, Kazuhisa Takami, Koyo Katsura, Hideki Fujii, Kazunori Oniki
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Patent number: 6049343Abstract: A device for controlling the table capacity smaller comprises a table of logarithms and a table of exponents preserving values of a logarithmic function and exponential function with a base of the second power, a multiplier, a shift unit for shifting the input value by a proper integer when the domain of logarithm is not included in the input value range of the table of logarithms, a logarithm addition unit for adding the shift amount to the value referred to in the table of logarithms, an exponent subtraction unit for subtracting a proper integer L from the input value when the domain of the exponential function is not included in the input value range of the table of exponents, and an exponent shift unit for shifting the referred value in the table of exponents the subtraction amount. A high-speed processing unit comprises a converter for converting floating-point data to fixed-point data having a bit of decimal point.Type: GrantFiled: January 20, 1998Date of Patent: April 11, 2000Assignee: Hitachi, Ltd.Inventors: Yuichi Abe, Ryo Fujita, Katsunori Suzuki, Kazuhisa Takami, Kazunori Oniki
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Patent number: 5781199Abstract: A parallel processing method for use with a graphics processor wherein graphics processing is performed by each of configured command processors efficiently in a distributed manner, with a host CPU remaining unaware of the number of command processors. Each command group of a variable length from a host CPU is distributed from an FIFO queue to a plurality of parallelly arranged command processors for parallel processing through any free one of input FIFO queues corresponding to the command processors. Upon command group distribution, an identical serial number is added as a command group serial number to the commands constituting the same command group. The results of processing of individual graphics commands by the command processors are collected via output FIFO queues, which also correspond to the processors, in the order of the command group serial numbers added to the commands before the processed results are graphically drawn.Type: GrantFiled: November 14, 1996Date of Patent: July 14, 1998Assignee: Hitachi, Ltd.Inventors: Kazunori Oniki, Masahiro Shiraishi, Koji Ozawa, Keisuke Yamane, Shinji Kimura
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Patent number: 5757364Abstract: The present invention relates to a graphic display apparatus for a multi-window graphic displaying system comprises a frame memory including double buffers for storing pixel data of display frames, first memorizing means for storing a successive frame number allocated to each pixel in each one of the display frames of which each set of pixel information is successively displayed and renewed, second memorizing means for storing window identifiers, each one of the identifiers being allocated in advance to each one of the multi-windows to be displayed, a table for storing the allocated frame numbers, information of designating one of buffers in the double-buffer and background color information, for each one of the multi-window, and means for comparing each one of the window identifiers and each one of the frame numbers read out from the first and second memorizing means, with each one of the window identifiers and each one of the frame numbers stored in the table, respectively, and for deciding pixel data to beType: GrantFiled: March 27, 1996Date of Patent: May 26, 1998Assignee: Hitachi, Ltd.Inventors: Koji Ozawa, Masahiro Shiraishi, Kazunori Oniki