Patents by Inventor Jiuhuai Lu
Jiuhuai Lu 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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Patent number: 9071817Abstract: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of performing orthogonal transformation on a block having the selected size; a coding step of coding data of said block obtained in the transformation step; and a generation step of generating a coded stream that includes the coded data of the block and size information concerning the size selected in the selection step, wherein the size information indicates whether or not the size is a fixed block size within a predetermined section in the coded stream, and the predetermined section is one of a sequence, a group of pictures, a picture, a slice, and a macroblock.Type: GrantFiled: January 13, 2014Date of Patent: June 30, 2015Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Yoshiichiro Kashiwagi, Masayuki Kozuka, Shinya Kadono
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Publication number: 20140126632Abstract: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of performing orthogonal transformation on a block having the selected size; a coding step of coding data of said block obtained in the transformation step; and a generation step of generating a coded stream that includes the coded data of the block and size information concerning the size selected in the selection step, wherein the size information indicates whether or not the size is a fixed block size within a predetermined section in the coded stream, and the predetermined section is one of a sequence, a group of pictures, a picture, a slice, and a macroblock.Type: ApplicationFiled: January 13, 2014Publication date: May 8, 2014Applicant: Panasonic CorporationInventors: Jiuhuai Lu, Yoshiichrio Kashiwagi, Masayuki Kozuka, Shinya Kadono
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Patent number: 8630342Abstract: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of performing orthogonal transformation on a block having the selected size; a coding step of coding data of said block obtained in the transformation step; and a generation step of generating a coded stream that includes the coded data of the block and size information concerning the size selected in the selection step, wherein the size information indicates whether or not the size is a fixed block size within a predetermined section in the coded stream, and the predetermined section is one of a sequence, a group of pictures, a picture, a slice, and a macroblock.Type: GrantFiled: October 25, 2011Date of Patent: January 14, 2014Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Yoshiichiro Kashiwagi, Masayuki Kozuka, Shinya Kadono
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Patent number: 8477838Abstract: A coding method for coding a picture in a moving picture with a processor configured to code, on a block-by-basis, each picture in the moving picture, to generate a coded stream. The processor transforms each picture into coefficients representing spatial frequency components and quantizes the coefficients with a quantization matrix. Identification information identifying the quantization matrix is provided in the coded stream in predetermined units to reduce the amount of data to be coded. The processor is configured to use a coded quantization matrix for a chroma component rather than a default quantization matrix.Type: GrantFiled: June 4, 2012Date of Patent: July 2, 2013Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Patent number: 8401074Abstract: The picture decoding method according to the present invention is a decoding method for decoding coded pictures by inverse quantization and inverse orthogonal transformation, in which a quantization matrix which defines a scaling ratio of a quantization step for each component is multiplied by a multiplier, which is a coefficient for frequency transformation or a quantization step, and also, a result of the multiplication is multiplied by a quantized value, as a process of inverse quantization.Type: GrantFiled: October 28, 2009Date of Patent: March 19, 2013Assignee: Panasonic CorporationInventors: Tao Chen, Jiuhuai Lu, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Patent number: 8396116Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: GrantFiled: June 4, 2012Date of Patent: March 12, 2013Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Publication number: 20120243603Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: ApplicationFiled: June 4, 2012Publication date: September 27, 2012Inventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Publication number: 20120243604Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: ApplicationFiled: June 4, 2012Publication date: September 27, 2012Inventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Patent number: 8218623Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: GrantFiled: March 2, 2011Date of Patent: July 10, 2012Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Patent number: 8194734Abstract: A moving picture decoding apparatus includes: a quantization matrix holding unit (202) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length decoding unit (201) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (202) and places the matrix ID in a coded stream Str.Type: GrantFiled: March 2, 2011Date of Patent: June 5, 2012Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Publication number: 20120039390Abstract: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of performing orthogonal transformation on a block having the selected size; a coding step of coding data of said block obtained in the transformation step; and a generation step of generating a coded stream that includes the coded data of the block and size information concerning the size selected in the selection step, wherein the size information indicates whether or not the size is a fixed block size within a predetermined section in the coded stream, and the predetermined section is one of a sequence, a group of pictures, a picture, a slice, and a macroblock.Type: ApplicationFiled: October 25, 2011Publication date: February 16, 2012Inventors: Jiuhuai Lu, Yoshiichiro Kashiwagi, Masayuki Kozuka, Shinya Kadono
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Patent number: 8081678Abstract: The picture coding method of the present invention is a picture coding method for coding a picture on a block-by-block basis, comprising: a selection step of selecting one of at least two sizes as a size of a block on which orthogonal transformation should be performed; a transformation step of performing orthogonal transformation on a block having the selected size; a coding step of coding data of said block obtained in the transformation step; and a generation step of generating a coded stream that includes the coded data of the block and size information concerning the size selected in the selection step, wherein the size information indicates whether or not the size is a fixed block size within a predetermined section in the coded stream, and the predetermined section is one of a sequence, a group of pictures, a picture, a slice, and a macroblock.Type: GrantFiled: February 18, 2004Date of Patent: December 20, 2011Assignee: Panasonic CorporationInventors: Jiuhuai Lu, Yoshiichiro Kashiwagi, Masayuki Kozuka, Shinya Kadono
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Patent number: 8036485Abstract: Picture quality measurement systems and methods are provided for measuring DC blockiness within video blocks. Block boundaries are located within a test video frame. The relative AC differences within each block are measured using a reference video frame, a statistically estimated reference or a default value of the white video level divided by two. An objective DC blockiness map, a subjective DC blockiness map or both may be generated.Type: GrantFiled: March 28, 2008Date of Patent: October 11, 2011Assignee: Tektronix, Inc.Inventors: Kevin M. Ferguson, Jiuhuai Lu
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Patent number: 7995650Abstract: The picture coding method according to the present invention is a picture coding method for coding a picture on a block-by-block basis through orthogonal transformation and quantization, and coding a quantization matrix that is used to derive quantization steps for frequencies of orthogonal transformation coefficients, the method comprising: calculating a difference value between each of frequency components included in the quantization matrix and a predetermined value corresponding to said each of the frequency components; and coding the difference value into a variable length code, wherein a code length of the variable length code is shorter as the difference value is smaller, or equal to a code length of a neighboring difference value of said difference value.Type: GrantFiled: January 11, 2011Date of Patent: August 9, 2011Assignee: Panasonic CorporationInventors: Shinya Kadono, Yoshiichiro Kashiwagi, Jiuhuai Lu, Chong Soon Lim, Tao Chen
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Publication number: 20110150083Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: ApplicationFiled: March 2, 2011Publication date: June 23, 2011Inventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Publication number: 20110150082Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: ApplicationFiled: March 2, 2011Publication date: June 23, 2011Inventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim
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Publication number: 20110110423Abstract: The picture coding method according to the present invention is a picture coding method for coding a picture on a block-by-block basis through orthogonal transformation and quantization, and coding a quantization matrix that is used to derive quantization steps for frequencies of orthogonal transformation coefficients, the method comprising: calculating a difference value between each of frequency components included in the quantization matrix and a predetermined value corresponding to said each of the frequency components; and coding the difference value into a variable length code, wherein a code length of the variable length code is shorter as the difference value is smaller, or equal to a code length of a neighboring difference value of said difference value.Type: ApplicationFiled: January 11, 2011Publication date: May 12, 2011Inventors: Shinya Kadono, Yoshiichiro Kashiwagi, Jiuhuai Lu, Chong Soon Lim, Tao Chen
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Patent number: RE46500Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: GrantFiled: February 19, 2016Date of Patent: August 1, 2017Assignee: Dolby International ABInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono Kadono, Chong Soon Lim
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Patent number: RE48401Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: GrantFiled: June 30, 2017Date of Patent: January 19, 2021Assignee: Dolby International ABInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono Kadono, Chong Soon Lim
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Patent number: RE49787Abstract: A moving picture coding apparatus 1 includes: a quantization matrix holding unit (112) that holds a quantization matrix (WM) which has already been transmitted in a parameter set and a matrix ID for identifying the quantization matrix (WM), which are associated with each other; and a variable length coding unit (111) that obtains the matrix ID corresponding to the quantization matrix (WM) used for quantization from the quantization matrix holding unit (112) and places the matrix ID in a coded stream Str.Type: GrantFiled: January 15, 2021Date of Patent: January 2, 2024Assignee: DOLBY INTERNATIONAL ABInventors: Jiuhuai Lu, Tao Chen, Yoshiichiro Kashiwagi, Shinya Kadono, Chong Soon Lim