Patents by Inventor Takashi Itow
Takashi Itow 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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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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Patent number: 6747693Abstract: An image-processing apparatus operates in different orientations, producing a source image that may be either right-side up or upside down. The source image is stored in a memory circuit, read from the memory circuit on one order if right-side up, and read from the memory circuit in a different order if upside down, generating an output image that is always right-side up.Type: GrantFiled: December 15, 1999Date of Patent: June 8, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Koichi Yamashita, Takashi Itow, Hiroaki Sugiura, Tetsuya Hayashi
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Publication number: 20030234873Abstract: An image capture apparatus which is compact and structurally simple and allows for prevention of a flicker noise, a method of capturing an image which allows for prevention of a flicker noise, and a mobile terminal using the apparatus and the method, are provided. In the image capture apparatus, a vertical cycle is adjusted so as to maintain 20 fps or 20/2m (m is an integer) fps, thereby to prevent a flicker noise in an image as obtained. To this end, in the image capture apparatus, a frequency fclk of a horizontal transfer clock, a horizontal count level Nh1 and a vertical line count level Nv are adjusted. Further, a fraction count is provided to adjust the length of one vertical cycle. Moreover, the image capture apparatus is incorporated in a mobile terminal.Type: ApplicationFiled: November 14, 2002Publication date: December 25, 2003Inventors: Kozo Ishida, Tetsuya Kuno, Koichi Yamashita, Hiroaki Sugiura, Takashi Itow
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Publication number: 20030189660Abstract: An imaging system controller (5) outputs a control signal (VC). The control signal (VC) gives a command to output driving clocks (&phgr;Vn, &phgr;Hm) of an imaging element (1) in a signal transmission period, and a command to suspend output of the clocks (&phgr;Vn, &phgr;Hm) in an idle period subsequent to the signal transmission period. The length of the idle period is a multiple of the length of the signal transmission period by a natural number. The imaging system controller (5) periodically repeats output of the control signal (VC) giving these commands a number of times corresponding to the number of horizontal lines of the imaging element (1). In response to the commands of the control signal (VC), a timing generator (2) generates and outputs the clocks (&phgr;Vn, &phgr;Hm), and suspends generation and output of the same. An imaging device (10) thereby intermittently drives the imaging element (1), to generate and output a picked-up image signal (V2).Type: ApplicationFiled: September 30, 2002Publication date: October 9, 2003Inventors: Kozo Ishida, Tetsuya Kuno, Koichi Yamashita, Hiroaki Sugiura, Takashi Itow
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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: 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: 5818529Abstract: When a digital video signal is compressed, the amount of resulting data is predicted and the quantization level is controlled so as to obtain a constant bit rate. The prediction is made by computing a linear combination of a standard deviation and a number of non-zero coefficients, or by computing a sum of absolute differences between adjacent pixel values, or by computing a dynamic range of pixel values. The bit rate can also be controlled by deleting high-frequency coefficients. To avoid image degradation, the quantization level can also be controlled according to the sensitivity of small image areas to quantization noise. Sensitivity is determined by dividing an area into subblocks, which may overlap, and calculating statistics in each subblock. To reduce the amount of computation required in motion estimation, chrominance motion vectors are derived from luminance motion vectors.Type: GrantFiled: May 30, 1996Date of Patent: October 6, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshinori Asamura, Takashi Itow, Tomohiro Ueda, Kenji Tsunashima, Satoshi Kurahashi
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Patent number: 5793432Abstract: An encoder counts the length of a data produced by the variable-length encoding, and time-division-multi-plexes information of the data length to the variable-length encoded data. Art encoder 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, 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 obtains the sum of fields and the difference between fields, and performs on these values the orthogonal transform to encode them.Type: GrantFiled: August 29, 1997Date of Patent: August 11, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Takashi Itow
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Patent number: 5734430Abstract: An encoder 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 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, 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 obtains the sum of fields and the difference between fields, and performs on these values the orthogonal transform to encode them.Type: GrantFiled: November 8, 1995Date of Patent: March 31, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Takashi Itow
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Patent number: 5583573Abstract: When a digital video signal is compressed, the amount of resulting data is predicted and the quantization level is controlled so as to obtain a constant bit rate. The prediction is made by computing a linear combination of a standard deviation and a number of non-zero coefficients, or by computing a sum of absolute differences between adjacent pixel values, or by computing a dynamic range of pixel values. The bit rate can also be controlled by deleting high-frequency coefficients. To avoid image degradation, the quantization level can also be controlled according to the sensitivity of small image areas to quantization noise. Sensitivity is determined by dividing an area into subblocks, which may overlap, and calculating statistics in each subblock. To reduce the amount of computation required in motion estimation, chrominance motion vectors are derived from luminance motion vectors.Type: GrantFiled: February 9, 1995Date of Patent: December 10, 1996Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshinori Asamura, Takashi Itow, Tomohiro Ueda, Kenji Tsunashima, Satoshi Kurahashi
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Patent number: 5488418Abstract: 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: December 3, 1992Date of Patent: January 30, 1996Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hidetoshi Mishima, Takashi Itow
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Patent number: 5479264Abstract: 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: January 29, 1993Date of Patent: December 26, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohiro Ueda, Takashi Itow, Yoshinori Asamura, Ken Onishi, Hidetoshi Mishima
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Patent number: 5440344Abstract: When a digital video signal is compressed, the amount of resulting data is predicted and the quantization level is controlled so as to obtain a constant bit rate. The prediction is made by computing a linear combination of a standard deviation and a number of non-zero coefficients, or by computing a sum of absolute differences between adjacent pixel values, or by computing a dynamic range of pixel values. The bit rate can also be controlled by deleting high-frequency coefficients. To avoid image degradation, the quantization level can also be controlled according to the sensitivity of small image areas to quantization noise. Sensitivity is determined by dividing an area into subblocks, which may overlap, and calculating statistics in each subblock. To reduce the amount of computation required in motion estimation, chrominance motion vectors are derived from luminance motion vectors.Type: GrantFiled: April 21, 1993Date of Patent: August 8, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yoshinori Asamura, Takashi Itow, Tomohiro Ueda, Kenji Tsunashima, Satoshi Kurahashi