1
Leon Lumelsky, Alan W Peevers: Audio video interactive display. International Business Machines Corporation, Jack M Arnold, February 19, 1991: US04994912 (111 worldwide citation)

A method and apparatus for synchronizing two independent rasters, such that a standard TV video and a high resolution computer generated graphics video may each be displayed on a high resolution graphics monitor. This is accomplished utilizing dual frame buffers. A TV frame buffer, comprises a dual ...


2
Leon Lumelsky, Sung M Choi, Alan W Peevers: Audio-video data interface for a high speed communication link in a video-graphics display window environment. International Business Machines Corporation, Roy R Schlemmer Jr, August 14, 1990: US04949169 (108 worldwide citation)

An interface architecture for interconnecting a plurality of video display devices together over a high speed digital communication link having limited bandwidth provides at each node for transmitting during a "transmit mode"; (1) sequential pixels of digital data (COMVIDOUT) comprising separate lum ...


3
Leon Lumelsky, Sung M Choi, Alan W Peevers, John L Pittas: Multi-source image real time mixing and anti-aliasing. International Business Machines Corporation, Perman & Green, September 27, 1994: US05351067 (96 worldwide citation)

Method and apparatus for implementing a raster graphic display video data path that provides arbitrary mixing of a plurality of images. The video data path is highly parallelized, and employs parallel devices operating under the control of a set of look-up tables. The look-up tables are loadable fro ...


4
Leon Lumelsky, Daniel H McCabe, Alan W Peevers: Color television window for a video display unit. International Business Machines Corporation, J David Ellett Jr, Daniel P Morris, February 1, 1994: US05283561 (83 worldwide citation)

A circuit for interfacing between a digital-television circuit for producing pixel data for television images and a computer graphics display permits rapid scaling and positioning of live television images on the graphics display. In a preferred embodiment, the digital-television/computer-graphics i ...


5
Leon Lumelsky, Calvin B Swart, John L Pittas, Sung M Choi, Alan W Peevers: Look-up table based gamma and inverse gamma correction for high-resolution frame buffers. International Business Machines Corporation, Perman & Green, March 23, 1993: US05196924 (78 worldwide citation)

An image display system includes an input to a source (10, 12, 14) of image pixel data wherein each pixel is expressed as an M-bit value within a non-linear range of values. A first LUT (16) is coupled to an output of the source for converting each M-bit pixel value to an N-bit value within a linear ...


6
Leon Lumelsky, Alan W Peevers, Sung M Choi: Pixel protection mechanism for mixed graphics/video display adaptors. International Business Machines Corporation, Roy R Schlemmer Jr, Louis J Percello, June 15, 1993: US05220312 (46 worldwide citation)

A locking mechanism is incorporated in a high-resolution video display system including a monitor, a computer for providing controls signals to said display system and two frame buffers, one for storing computer generated graphics images and one for storing video data both of said buffers being oper ...


7
Steven P Larky, Alan W Peevers, Joe C St Clair: Pixel depth converter for a computer video display. International Business Machines Corporation, Daniel P Morris, June 7, 1994: US05319395 (40 worldwide citation)

A pixel-depth converter for source-pixel data having a source-pixel depth to destination-pixel data having a destination-pixel depth which differs from the source-pixel depth. A packed-pixel-data depacker circuit receives source-pixel data words having a packed-pixel data format from a source-pixel- ...


8
Satish Gupta, Steven P Larky, Alan W Peevers, Joe C St Clair: Virtual display adapter. International Business Machines Corporation, Perman & Green, May 12, 1992: US05113180 (40 worldwide citation)

A display control such as a virtual display adapter allows the advanced functions of a display controller to be utilized in a large area of memory in addition to the normal use in display memory. This large area of memory includes system memory, and efficient access to this large area of memory is p ...


9
Leon Lumelsky, Sung Min Choi, Alan W Peevers: Color television window expansion and overscan correction for high-resolution raster graphics displays. International Business Machines Corporation, Roy R Schlemmer, Jack M Arnold, June 2, 1992: US05119082 (34 worldwide citation)

A video pixel presentation rate expansion circuit is provided for use with a high-resolution display system. The overall display system includes a high-resolution monitor, a computer for providing control signals, including a high-resolution frame buffer for storing computer graphics and TV video im ...


10
John L Pittas, Sung M Choi, Leon Lumelsky, Alan W Peevers: Communication apparatus and method for transferring image data from a source to one or more receivers. International Business Machines Corporation, Perman & Green, March 22, 1994: US05296936 (29 worldwide citation)

A high-speed communications network (10) provides singlecast, multicast, or broadcast image data capability and is implemented utilizing the High-Performance Parallel Interface (HPPI) as a physical channel. A server (12) includes both a HPPI receiver and transmitter. Workstations (18) support a HPPI ...