1
Teruhiko Suzuki, Yoichi Yagasaki, Tatsuya Sudo, Toru Okazaki: Methods and apparatus for preventing rounding errors when transform coefficients representing a motion picture signal are inversely transformed. Sony Corporation, Ian Hardcastle, Limbach & Limbach, January 2, 1996: US05481553 (202 worldwide citation)

Mismatch errors occur in the local decoder of a MPEG-standard compressor for a motion picture signal, and in an MPEG-standard expander for a compressed motion picture signal. This is because of the lack of a standard for rounding results of *0.5 (* is an integer) obtained when a set of transform coe ...


2
Teruhiko Suzuki, Yoichi Yagasaki: Picture encoding and/or decoding apparatus and method for providing scalability of a video object whose position changes with time and a recording medium having the same recorded thereon. Sony Corporation, William S Frommer, Dennis M Smid, Frommer Lawrence & Haug, August 1, 2000: US06097842 (177 worldwide citation)

An apparatus and method for obtaining scalability of a video object (VO) whose position and/or size changes with time. The position of an upper layer picture and that of a lower layer picture in an absolute coordinate system are determined so that corresponding pixels in an enlarged picture and in t ...


3
Jun Yonemitsu, Yoichi Yagasaki: Methods and devices for encoding and decoding frame signals and recording medium therefor. Sony Corporation, Charles P Sammut, Limbach & Limbach, April 23, 1996: US05510840 (175 worldwide citation)

A motion vector detection circuit detects the motion vector for each macro-block between an odd field and an even field. An encoding system decision circuit decides the type of the encoding system, that is if the encoding system is a field-based encoding system or a frame-based encoding system, base ...


4
Jun Yonemitsu, Yoichi Yagasaki: Recording/reproducing compressed data on a rotatable record medium in which at least one intraframe code signal and at least (n-1) interframe code signals are recorded in each track. Sony Corporation, Alvin Sinderbrand, William S Frommer, August 18, 1992: US05140437 (167 worldwide citation)

Image data is recorded in successive turns on a rotatable record medium driven at substantially constant linear velocity by converting a first of successive image frames of image data to an intraframe code signal, converting the (n-1) next-following frames to (n-1) interframe code signals, and recor ...


5
Katsuji Igarashi, Jun Yonemitsu, Yoichi Yagasaki, Yasushi Fujinami, Tomoyuki Sato, Motoki Kato, Teruhiko Suzuki: High efficiency encoding and decoding of picture signals and recording medium containing same. Sony Corporation, William S Frommer, Alvin Sinderbrand, September 9, 1997: US05666461 (130 worldwide citation)

An encoder considers a frame representing a picture as comprised of areas. For each area, the encoder decides which of frame-based or field-based orthogonal transformation will be most efficient at reducing spatial redundancy in that area. For each area, the encoder decides which of frame-based or f ...


6
Teruhiko Suzuki, Yoichi Yagasaki: Multimedia information retrieval system and method including format conversion system and method. Sony Electronics, Sony Corporation, Wagner Murabito & Hao, October 8, 2002: US06463445 (124 worldwide citation)

A multimedia information retrieval system and method including a method and system for automatic format conversion. The invention includes a data structure that is associated with each multimedia bitstream. The data structure identifies the encoding format, e.g., compression technique, used in the m ...


7
Toru Okazaki, Yoichi Yagasaki, Yasuhiro Muramatsu: Coding method and system, and decoding method and system. Sony Corporation, William S Frommer, Frommer Lawrence & Haug, November 9, 1999: US05982437 (108 worldwide citation)

A coding method, decoding method, coding system, and decoding system for efficiently variable length coding and variable length decoding quantized data compared with existing ones. Input data is variable length coded by using a variable length coding table 23C or 23D selected among a plurality of va ...


8
Yoichi Yagasaki, Jun Yonemitsu, Mark Veltman, Katsuji Igarashi, Motoki Kato: Variable length coding/decoding method for motion vectors. Sony Corporation, William S Frommer, Alvin Sinderbrand, June 27, 1995: US05428396 (107 worldwide citation)

In connection with compression-coding of video signals on the basis of inter-frame correlation, a single reference table is used for variable length encoding of inter-frame motion vectors established on the basis of various motion vector value ranges and degrees of accuracy. A reference table is pro ...


9
Jun Yonemitsu, Teruhiko Suzuki, Yoichi Yagasaki: Apparatus for coding and decoding a digital video signal derived from a motion picture film source. Sony Corporation, Ian Hardcastle, Limbach & Limbach, October 24, 1995: US05461420 (96 worldwide citation)

A method for coding an input video signal with a field rate of 60 Hz derived from a motion picture film source using 2-3 pulldown. In the method, duplicate fields are detected in the input video signal. Each duplicate field is eliminated from the input video signal to produce a progressive video sig ...


10
Jun Yonemitsu, Yoichi Yagasaki, Katsuji Igarashi, Mark Veltman: Video signal transmitting system. Sony Corporation, Alvin Sinderbrand, William S Frommer, July 21, 1992: US05132792 (94 worldwide citation)

Video signal transmitting system in which digital video signal are divided into groups of predetermined frames. Digital video signals of at least one frame are intraframe coded and then transmitted. Remaining digital video signals are interframe coded with reference to the intraframe coded digital v ...