Patents by Inventor Fumitaka Ono
Fumitaka Ono 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: 6756921Abstract: Plural decoded results are obtained from one code data based on with/without change information attached to encoding information shared by the receiver.Type: GrantFiled: April 1, 2003Date of Patent: June 29, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Fumitaka Ono, Masayuki Yoshida
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Patent number: 6754393Abstract: Encoding efficiency is enhanced by actively combining a plurality of encoding methods. A picture element memory receives and stores picture elements within a predetermined range. A mode determinator selects an encoding mode based upon a reference picture element. A first encoding section and a second encoding section predicts the value of the encoded picture element, determines whether the prediction is correct, and then encodes the value of the encoding picture element based on the determination result and outputs a codeword for the encoding picture element. An encoding controller selectively operates the first encoding section and the second encoding section based upon one of the specific encoding modes and the other encoding mode other than the specific encoding mode selected by the mode determinator.Type: GrantFiled: April 22, 2003Date of Patent: June 22, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taich Nagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Patent number: 6744925Abstract: Encoding efficiency is enhanced by actively combining a plurality of encoding methods. A picture element memory receives and stores picture elements within a predetermined range. A mode determinator selects an encoding mode based upon a reference picture element. A first encoding section and a second encoding section predicts the value of the encoded picture element, determines whether the prediction is correct, and then encodes the value of the encoding picture element based on the determination result and outputs a codeword for the encoding picture element. An encoding controller selectively operates the first encoding section and the second encoding section based upon one of the specific encoding modes and the other encoding mode other than the specific encoding mode selected by the mode determinator.Type: GrantFiled: November 29, 2001Date of Patent: June 1, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Publication number: 20040036635Abstract: Plural decoded results are obtained from one code data based on with/without change information attached to encoding information shared by the receiver.Type: ApplicationFiled: April 1, 2003Publication date: February 26, 2004Inventors: Tomohiro Kimura, Fumitaka Ono, Masayuki Yoshida
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Patent number: 6636641Abstract: By combining a plurality of encoding methods actively, an encoding efficiency is enhanced. The first encoder encodes a result of determination whether a prediction error is zero or not. The second encoder encodes the prediction error unless the prediction error is zero. The third encoder encodes the prediction error regardless of whether the prediction error is zero or not. The mode determinator determines the encoding mode, and the encoding controller selectively operates the first encoder, the second encoder, and the third encoder according to the encoding mode determined.Type: GrantFiled: December 10, 1999Date of Patent: October 21, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Publication number: 20030194140Abstract: Encoding efficiency is enhanced by actively combining a plurality of encoding methods. A picture element memory receives and stores picture elements within a predetermined range. A mode determinator selects an encoding mode based upon a reference picture element. A first encoding section and a second encoding section predicts the value of the encoded picture element, determines whether the prediction is correct, and then encodes the value of the encoding picture element based on the determination result and outputs a codeword for the encoding picture element. An encoding controller selectively operates the first encoding section and the second encoding section based upon one of the specific encoding modes and the other encoding mode other than the specific encoding mode selected by the mode determinator.Type: ApplicationFiled: April 22, 2003Publication date: October 16, 2003Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taich Nagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Patent number: 6411231Abstract: In an adaptive probability estimation method, an index referring to coding parameters is determined according to occurrence probabilities of symbols from estimated occurrence counts of symbols, thresholds for probability values that determine the probability intervals corresponding to the indexes are set to values that are examined with small operational load, and an index referring to the corresponding occurrence probability is selected without division, using the probability intervals determined by the thresholds for probability values.Type: GrantFiled: March 24, 1999Date of Patent: June 25, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Taichi Yanagiya, Tomohiro Kimura, Ikuro Ueno, Masayuki Yoshida, Fumitaka Ono
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Patent number: 6373408Abstract: The present invention aims to reduce the code length and time for flushing the code. An encoding apparatus includes a data memory storing information source data, a learning memory storing learning data relating the encoding data, a probability estimation table for outputting an encoding parameter indicated by the learning data, and an encoder outputting the code by implementing an arithmetic encoding based on the encoding data and the encoding parameter. In the above encoding apparatus, according to the present invention, a synchronization detector is provided measuring one of inputting the information source data and outputting the code at a predetermined interval. Further, the encoding apparatus includes a boundary detector detecting a carry boundary value within the effective region at predetermined interval and instructing to truncate a part of the effective region based on the detection result.Type: GrantFiled: April 11, 2000Date of Patent: April 16, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Masayuki Yoshida, Fumitaka Ono
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Publication number: 20020037111Abstract: Encoding efficiency is enhanced by actively combining a plurality of encoding methods. A picture element memory receives and stores picture elements within a predetermined range. A mode determinator selects an encoding mode based upon a reference picture element. A first encoding section and a second encoding section predicts the value of the encoded picture element, determines whether the prediction is correct, and then encodes the value of the encoding picture element based on the determination result and outputs a codeword for the encoding picture element. An encoding controller selectively operates the first encoding section and the second encoding section based upon one of the specific encoding modes and the other encoding mode other than the specific encoding mode selected by the mode determinator.Type: ApplicationFiled: November 29, 2001Publication date: March 28, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Patent number: 6351569Abstract: A prediction value is previously set in an MPS table corresponding to a state number, a state number for an encoding pixel is obtained from a STATE table, the prediction value is determined based on the MPS table using the state number, a pixel-to-symbol converter compares the prediction value and the encoding pixel to obtain a symbol, and an arithmetic encoder obtains an LPS interval from an LSZ table using the state number for the encoding pixel, and the arithmetic encoder implements encoding based on the symbol and the LPS interval.Type: GrantFiled: September 23, 1998Date of Patent: February 26, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Masayuki Yoshida, Fumitaka Ono
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Publication number: 20020021234Abstract: In an adaptive probability estimation method, an index referring to coding parameters is determined according to occurrence probabilities of symbols from estimated occurrence counts of symbols, thresholds for probability values that determine the probability intervals corresponding to the indexes are set to values that are examined with small operational load, and an index referring to the corresponding occurrence probability is selected without division, using the probability intervals determined by the thresholds for probability values.Type: ApplicationFiled: March 24, 1999Publication date: February 21, 2002Inventors: TAICHI YANAGIYA, TOMOHIRO KIMURA, IKURO UENO, MASAYUKI YOSHIDA, FUMITAKA ONO
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Publication number: 20020006225Abstract: The present invention aims to reduce the code length and time for flushing the code. An encoding apparatus includes a data memory storing information source data, a learning memory storing learning data relating the encoding data, a probability estimation table for outputting an encoding parameter indicated by the learning data, and an encoder outputting the code by implementing an arithmetic encoding based on the encoding data and the encoding parameter. In the above encoding apparatus, according to the present invention, a synchronization detector is provided measuring one of inputting the information source data and outputting the code at a predetermined interval. Further, the encoding apparatus includes a boundary detector detecting a carry boundary value within the effective region at predetermined interval and instructing to truncate a part of the effective region based on the detection result.Type: ApplicationFiled: April 11, 2000Publication date: January 17, 2002Inventors: Tomohiro Kimura, Masayuki Yoshida, Fumitaka Ono
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Patent number: 6223027Abstract: An image data transmission system includes mobile transceivers having memories storing image data that is organized in sequential blocks. The mobile transceivers sequentially pass by a stationary transceiver and pause proximate the stationary transceiver. While pausing, a mobile transceiver transmits a block of the image data to the stationary transceiver, which receives and stores the transmitted data. Data transmission is interrupted by movement of the formerly pausing mobile transceiver. The stationary transceiver transmits a pointer signal to a paused mobile transceiver indicating which blocks of image data have been stored in the stationary transceiver so that the mobile transceivers transmit the blocks sequentially until all blocks have been received and stored by the stationary transceiver. The apparatus may be employed in a mass transit system, such as a subway or commuter train, in which the mobile transceivers are mounted in train cars and the stationary transceiver is located at a station.Type: GrantFiled: September 2, 1998Date of Patent: April 24, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Fumitaka Ono, Junichi Sadamatsu, Hitoshi Kubota, Yoshihiro Ashizaki, Koji Kaneko, Akira Kotani, Toshiyuki Takahashi, Yoichi Tenda, Atsushi Tanaka, Kunio Ueda
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Patent number: 6188793Abstract: By combining a plurality of encoding methods actively, an encoding efficiency is enhanced. The first encoder encodes a result of determination whether a prediction error is zero or not. The second encoder encodes the prediction error unless the prediction error is zero. The third encoder encodes the prediction error regardless of whether the prediction error is zero or not. The mode determinator determines the encoding mode, and the encoding controller selectively operates the first encoder, the second encoder, and the third encoder according to the encoding mode determined.Type: GrantFiled: November 19, 1997Date of Patent: February 13, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida, Fumitaka Ono, Narihiro Matoba, Kunio Ueda
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Patent number: 6075471Abstract: An adaptive coding method is comprised of: a fourth step (508), (510) for calculating an occurrence frequency of either the more probable symbol (MPS) or the less probable symbol (LPS) with respective to the entered input; a fifth step (511) for comparing an occurrence time accumulated value calculated as the occurrence frequency at the fourth step with a preselected value (threshold value), and for reducing the occurrence time accumulated value by 1/2 in the case that the occurrence time accumulated value reaches the preselected value (threshold value); and a sixth step (513) for defining the more probable symbol (MPS) and the less probable symbol (LPS) in correspondence with a predetermined region on a numerical line with respect to the data signal to thereby output coordinate values on the numerical line as a corded word.Type: GrantFiled: March 12, 1998Date of Patent: June 13, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Fumitaka Ono, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida
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Patent number: 5991449Abstract: An image memory outputs a target encoding pixel and a plurality of reference pixels in the vicinity thereof. A boundary mode determining unit determines a maximum value and a minimum value of the reference pixels, determines an average value of the maximum value and the minimum value, compares the respective reference pixel values with the average value, detects a boundary in the target encoding pixel and the reference pixels based on comparison results, and detects a pixel distribution state of the reference pixels based on the detected boundary. An adaptive predictor calculates a prediction value by performing a calculation based on a function corresponding to the pixel distribution state and the reference pixels. A prediction difference calculating unit determines a difference value between the prediction value and a value of the target encoding pixel.Type: GrantFiled: July 15, 1996Date of Patent: November 23, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Ikuro Ueno, Taichi Yanagiya, Masayuki Yoshida, Fumitaka Ono, Naoto Tanabe
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Patent number: 5592163Abstract: This invention relates to a coding system and the coding method in encoding information source symbols of an image. When the total number of original information source symbols cannot be known at the decoding site just from the encoded symbols, it is an object to finish the decoding process correctly and decode the symbols equal to the number of original information source symbols.At an encoding site, the total number of information source unit composed of a finite number of information source symbols is placed at the tail of code at the completion of encoding process. For example, at the encoding site, the number of horizontal pels of an image are transmitted in advance as an information source unit and the total number of lines are placed at the tail of code at the completion of encoding process. At the decoding site, the number of decoded lines is counted and decoded up to the number of lines placed at the tail of code.Type: GrantFiled: August 1, 1994Date of Patent: January 7, 1997Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Kimura, Shigenori Kino, Masayuki Yoshida, Fumitaka Ono
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Patent number: 5404140Abstract: A coding system comprises the comparing circuit which compares a magnitude of the range on the number line which is allocated to the most probability symbol with a magnitude of the fixed range on the number line which is allocated to the Less Probability Symbol. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the MPS, the range allocated to the LPS is generated. If the range allocated to the MPS is smaller than that to the LPS, and when the symbol is the LPS, the range allocated to the MPS is generated. By the system, a coding efficiency is improved especially when a probability of occurrence of LPS (Less Probability Symbol) is approximate to 1/2.Type: GrantFiled: January 13, 1994Date of Patent: April 4, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Fumitaka Ono, Tomohiro Kimura, Masayuki Yoshida, Shigenori Kino
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Patent number: 5313204Abstract: Encoding and decoding devices which are capable of increasing the encoding and decoding speed. In arithmetic encoding, there is a possibility of encoding with high efficiency which is very close to the entropy of the information source, but the encoding and decoding time is generally longer than that in another encoding systems such as an MMR encoding system. For example, in a standard facsimile equipment, about 1.3 sec is required for encoding the picture information in an A4-size copy. In prediction encoding, a memory for storing the past reference symbols and the predicted values therefor is necessary for prediction. Since the memory capacity is generally large, a large-capacity RAM is used. The encoding time is therefore greatly dependent on the access speed of the RAM.Type: GrantFiled: April 20, 1992Date of Patent: May 17, 1994Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takayoshi Semasa, Makoto Matsumoto, Yukiyasu Kawahata, Tomohiro Kimura, Fumitaka Ono
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Patent number: RE35781Abstract: A coding method of a binary Markov information source comprises the steps of providing a range on a number line from 0 to 1 which corresponds to an output symbol sequence from the information source, and performing data compression by binary expressing the position information on the number line corresponding to the output symbol sequence. The present method further includes the steps of providing a normalization number line to keep a desired calculation accuracy by expanding a range of the number line which includes a mapping range, by means of a multiple of a power of 2, when the mapping range becomes below 0.Type: GrantFiled: November 7, 1995Date of Patent: May 5, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Fumitaka Ono, Shigenori Kino, Masayuki Yoshida, Tomohiro Kimura