1
Masahiro Wada, Hirohisa Yamaguchi, Hideo Yamamoto: Moving picture signal transmission system. Kokusai Denshin Denwa, Armstrong Nikaido Marmelstein & Kubovcik, May 2, 1989: US04827339 (95 worldwide citation)

Moving picture signal transmission system, wherein the data-compression is effected for the moving picture by the intraframe-encoding and the interframe-encoding, the signal is divided into the fixed frame-length transmission frame, the transmission frame has the header (A, B, C) which identifies wh ...


2
Akinori Mawatari, Hirohisa Yamaguchi, Kenji Nakamura, Satoshi Uchiumi: PCM Recording and reproducing method providing for dropout compensation. TEAC Corporation, Woodcock Washburn Kurtz Mackiewicz & Norris, September 23, 1980: US04224642 (63 worldwide citation)

For recording and reproducing analog audio signals by a pulse-code modulation scheme so as to permit effective compensation for dropout errors, an incoming audio signal is sampled, and the analog samples are converted into a sequence of coded pulse groups or words. These words are grouped into succe ...


3
Masahiro Wada, Hirohisa Yamaguchi: Movement estimation system for video signals using a recursive gradient method. Kokusai Denshin Denwa, Armstrong Nikaido Marmelstein & Kubovcik, September 22, 1987: US04695882 (60 worldwide citation)

A movement of a small picture block in a frame of video signals is provided by recursively applying a gradient method to a picture block in a present frame and a preceding frame to provide a series of sub-movements until said sub-movement decreases less than a predetermined value, and the resultant ...


4
Hirohisa Yamaguchi: Home picture/video display system with ultra wide-band technology. Texas Instruments Incorporated, Steven A Shaw, W James Brady, Frederick J Telecky Jr, February 5, 2008: US07327385 (50 worldwide citation)

A new display system and method is described, utilizing a cellular telephone having digital camera capability and a television linked directly over a UWB wireless signal forming a UWB wireless video pico-net. The system utilizes a digital camera unit to capture picture or video images for UWB transm ...


5
Hirohisa Yamaguchi: Multi-path equalization for orthogonal frequency division multiplexing communication system. Texas Instruments Incorporated, Ronald O Neerings, Wade James Brady III, Frederick J Telecky Jr, August 29, 2006: US07099270 (40 worldwide citation)

A multi-path equalization system for orthogonal frequency division multiplexing communication (OFDM) system includes a first estimator for estimating the channel characteristic using pilot signal. A divider is coupled to the estimator for dividing each sub-carrier with the channel characteristic to ...


6
Hirohisa Yamaguchi, Masahiro Wada, Hideo Yamamoto: Frame rate conversion system in television signal. Kokusai Denshin Denwa, Armstrong Nikaido Marmelstein & Kubovcik, June 9, 1987: US04672442 (27 worldwide citation)

A frame rate conversion, for instance between NTSC and PAL, or SECAM, has been improved by interpolation system in which an interpolation is performed from picture elements of two consecutive frames of an original picture signal whose positions are shifted from the position of a picture element to b ...


7
Hirohisa Yamaguchi: Image processing system. Texas Instruments Incorporated, Richard L Donaldson, William B Kempler, July 28, 1998: US05786857 (26 worldwide citation)

An image-processing system in which harmful noises of image compression are effectively removed. The image processing system includes a transformation device for receiving m pixels.times.n lines of image information from an input and converting the image information via discrete cosine transformatio ...


8
Hirohisa Yamaguchi: Cell search synchronization. Texas Instruments Incorporated, Carlton H Hoel, W James Brady III, Frederick J Telecky Jr, September 19, 2006: US07110782 (23 worldwide citation)

Cell search synchronization in spread spectrum communications systems using primary and second synchronization codes with symbol partitioning for shorter coherent combinations (despreading) which are combined non-coherently, and Fourier transform analysis automatically adjusts for phase rotation of ...


9
Yiwan Wong, Hirohisa Yamaguchi: Method and apparatus for removing noise artifacts in decompressed video signals. Texas Instruments Incorporated, Wade James Brady III, Frederick J Telecky Jr, May 22, 2001: US06236763 (22 worldwide citation)

A method of and circuitry for removing noise artifacts in decompressed video signals. A group of pixels is selected from a larger matrix of pixels from adjacent rows and columns of the matrix. A plurality of different subgroups of the group of pixels is selected, each subgroup including the same cen ...


10
Tetsuhisa Okayama, Yoshiaki Aoyama, Hiroyuki Hoshino, Hirohisa Yamaguchi: Image filing apparatus and method for storing image data and directory information. Teac Corporation, Michael N Meller, November 17, 1998: US05838967 (16 worldwide citation)

An addition unit adds information for managing a plurality of image-data files to directory information packets. A managing unit utilizes the added information for managing the plurality of image-data files. A retrieving unit retrieves, in accordance with an input retrieving information, a desired i ...