Patents by Inventor Hidetoshi Mishima
Hidetoshi Mishima 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: 20060133487Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: March 2, 2006Publication date: June 22, 2006Inventors: TOMOHIRO UEDA, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20050089312Abstract: In a video disk recording/playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and/or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and/or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data.Type: ApplicationFiled: November 23, 2004Publication date: April 28, 2005Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Kouichi Shirakawa, Tadashi Kasezawa, Masato Nagasawa, Yoshihiro Kiyose, Hiroyuki Ohata, Hidetoshi Mishima, Yoshinori Asamura
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Patent number: 6870884Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: March 18, 1999Date of Patent: March 22, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20030138044Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: February 25, 2003Publication date: July 24, 2003Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Publication number: 20030133501Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: ApplicationFiled: November 4, 2002Publication date: July 17, 2003Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 6549717Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: GrantFiled: March 6, 2000Date of Patent: April 15, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Patent number: 6539164Abstract: In a video disk recording/playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and/or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and/or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data.Type: GrantFiled: June 8, 1999Date of Patent: March 25, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kouichi Shirakawa, Tadashi Kasezawa, Masato Nagasawa, Yoshihiro Kiyose, Hiroyuki Ohata, Hidetoshi Mishima, Yoshinori Asamura
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Patent number: 6480670Abstract: In an image signal encoding method for encoding an image signal using motion compensation, a motion vector is found by means of a block matching method, a first distortion SEmc of motion compensated prediction associated with the motion vector, and a second distortion SEnomc of prediction without motion compensation are detected, the motion vector is used for for inter-picture prediction encoding when SEnomc>SEmc+K, with K being a constant greater than 0, and a vector having a value zero is used, in place of the motion vector, for inter-picture prediction encoding when SEnomc≦SEmc+K. In another aspect, a speed of motion in a sequence of pictures is detected, and for a part of the sequence of pictures detected to contain a quick motion, the prediction encoding is performed using one-way prediction encoding, and for a part of the sequence of pictures without a quick motion, prediction encoding is performed using bi-directional prediction encoding.Type: GrantFiled: November 29, 1999Date of Patent: November 12, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshiko Hatano, Tadashi Kasezawa, Koji Okazaki, Takashi Shinohara, Hiromu Hasegawa, Hidetoshi Mishima
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Publication number: 20020090207Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: ApplicationFiled: February 27, 2002Publication date: July 11, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Publication number: 20020085831Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: ApplicationFiled: February 27, 2002Publication date: July 4, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Publication number: 20020044760Abstract: In a video disk recording/playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and/or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and/or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data.Type: ApplicationFiled: December 11, 2001Publication date: April 18, 2002Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Kouichi Shirakawa, Tadashi Kasezawa, Masato Nagasawa, Yoshihiro Kiyose, Hiroyuki Ohata, Hidetoshi Mishima, Yoshinori Asamura
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Publication number: 20010043792Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: ApplicationFiled: March 6, 2000Publication date: November 22, 2001Inventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Publication number: 20010031132Abstract: In a video disk recording/playback device for converting a digital video signal or the like into high-efficiency coded data and recording the coded data on a video disk, or for restoring high-efficiency coded data recorded on the video disk and reproducing an output image, wherein said digital video signal is composed of a succession of video signals of a plurality of frames and including an I picture encoded within a frame, a P picture interframe coded by forward motion compensation with reference to said I picture and/or another P picture, and a B picture interframe coded by motion compensation in both directions with reference to said I and/or P pictures temporally preceding and succeeding the B picture, there are further provided a means for recording in an image information table set up on said video disk all of the start addresses of coded data representing selected images such as images to be retrieved and the start addresses of data containing information required for reproducing the coded data.Type: ApplicationFiled: June 8, 1999Publication date: October 18, 2001Inventors: KOUICHI SHIRAKAWA, TADASHI KASEZAWA, MASATO NAGASAWA, YOSHIHIRO KIYOSE, HIROYUKI OHATA, HIDETOSHI MISHIMA, YOSHINORI ASAMURA
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Patent number: 6134382Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: GrantFiled: June 10, 1999Date of Patent: October 17, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Patent number: 6091460Abstract: In an image signal encoding method for encoding an image signal using motion compensation, a motion vector is found by means of a block matching method, a first distortion SEmc of motion compensated prediction associated with the motion vector, and a second distortion SEnomc of prediction without motion compensation are detected, the motion vector is used for for inter-picture prediction encoding when SEnomc>SEmc+K, with K being a constant greater than 0, and a vector having a value zero is used, in place of the motion vector, for inter-picture prediction encoding when SEnomc.ltoreq.SEmc+K. In another aspect, a speed of motion in a sequence of pictures is detected, and for a part of the sequence of pictures detected to contain a quick motion, the prediction encoding is performed using one-way prediction encoding, and for a part of the sequence of pictures without a quick motion, prediction encoding is performed using bi-directional prediction encoding.Type: GrantFiled: October 10, 1997Date of Patent: July 18, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshiko Hatano, Tadashi Kasezawa, Koji Okazaki, Takashi Shinohara, Hiromu Hasegawa, Hidetoshi Mishima
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Patent number: 6009236Abstract: A digital video signal record and playback device for recording on a recording medium a digital video signal coded by using a motion compensation prediction and an orthogonal transform and playing back data from the recording medium. In a data arrangement of a digital video signal, an I picture which can be independently represented in a picture is divided into n areas in the vertical direction, and the data is arranged from the front of one GOP in the unit of area by giving a priority to an area located at the center of the screen. A playback picture is outputted by playing back the I picture read from the recording medium in the unit of area unit. In the case where the whole I picture area cannot be read within a definite time, the area which cannot be read are interpolated by the use of the data of the preceding screen.Type: GrantFiled: June 18, 1997Date of Patent: December 28, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshinori Asamura, Yoshiko Hatano, Shuji Sotoda, Satoshi Kurahashi, Takahiro Nakai, Tadashi Kasezawa, Masato Nagasawa, Hiroyuki Oohata, Yoshinobu Ishida
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Patent number: 5990963Abstract: An encoder which counts the length of a data produced by the variable-length encoding, and time-division-multiplexes information of the data length to the variable-length encoded data. An encoder which time-division-multiplexes information of the number of bits after a fixed partition used in the error-correction encoding to the initial bit of a variable-length code to a variable-length encoded data, and transmits them. An encoder which, when a variable-length code for one symbol of the variable-length encoding extends over a partition used in the error-correction encoding, inserts a special code before the partition, or guarantees that the top of the partition is always at the top of the variable-length code. An encoder which obtains the sum of fields and the difference between fields, and performs on these values the orthogonal transform to encode them.Type: GrantFiled: June 9, 1998Date of Patent: November 23, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Takashi Itow
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Patent number: 5909252Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: July 10, 1998Date of Patent: June 1, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 5841474Abstract: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field.Type: GrantFiled: November 15, 1995Date of Patent: November 24, 1998Assignee: Mitsubshi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 5825419Abstract: A coding device of a digital image signal coding highly efficiently a digital image signal by using a bidirectional motion compensating prediction and a DCT (digital cosine transform) transformation thereby compressing information, including inputting reference images for coding images for a bidirectional prediction to a spatial region as data and blocking the data, coding the blocked data, writing the coded data to a memory, reading reference regions for calculating a motion vector for prediction or data of the reference regions for calculating a prediction value from the memory, decoding the read data, and calculating the motion vector or means for calculating the prediction value by using the decoded data.Type: GrantFiled: September 26, 1996Date of Patent: October 20, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Yoshiko Hatano, Yoshinori Asamura