US Patent No: 5,751,979

Number of patents in Portfolio can not be more than 2000

Video hardware for protected, multiprocessing systems

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Importance

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Abstract

A video controller that enables applications operating in a protected, multiprocessing system to update a video memory at native speeds. In this system and method, each application is assigned a separate physical address region that identifies an alias of an application's window in the video memory. The separate physical address regions provide an addressing mechanism for an application to identify a referenced set of pixels sought to be accessed. A window mapping function within the video controller that performs only those portions of a video memory access request that references pixels contained within a visible portion of an application's window as defined by priority, size and position information in a control structure.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
UNISYS CORPORATIONBLUE BELL, PA2757

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
McCrory, Duane J Malvern, PA 19 400

Cited Art

Patent Info (Count) # Cites Year
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (4)
5,155,822 High performance graphics workstation 19 1987
5,025,249 Pixel lookup in multiple variably-sized hardware virtual colormaps in a computer video graphics system 32 1988
5,058,041 Semaphore controlled video chip loading in a computer video graphics system 14 1988
5,321,810 Address method for computer graphics system 43 1991
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (4)
4,651,146 Display of multiple data windows in a multi-tasking system 61 1983
4,653,020 Display of multiple data windows in a multi-tasking system 119 1983
4,642,790 Presentation space management and viewporting on a multifunction virtual terminal 172 1984
5,276,437 Multi-media window manager 21 1992
 
SUN MICROSYSTEMS, INC. (2)
4,688,190 High speed frame buffer refresh apparatus and method 29 1983
5,245,702 Method and apparatus for providing shared off-screen memory 38 1991
 
BURROUGHS CORPORATION (1)
4,542,376 System for electronically displaying portions of several different images on a CRT screen through respective prioritized viewports 81 1983
 
E-M TECHNOLOGY, LNC. (1)
5,062,057 Computer display controller with reconfigurable frame buffer memory 68 1988
 
E-SYSTEMS, INC. (1)
4,845,640 High-speed dual mode graphics memory 15 1987
 
INGERSOLL-RAND COMPANY (1)
5,561,755 Method for multiplexing video information 5 1994
 
KABUSHIKI KAISHA TOSHIBA (1)
4,933,877 Bit map image processing apparatus having hardware window function 13 1988
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
4,882,683 Cellular addressing permutation bit map raster graphics architecture 81 1987
 
NEC CORPORATION (1)
4,594,587 Character oriented RAM mapping system and method therefor 28 1983
 
QUARTERDECK OFFICE SYSTEMS, INC. (1)
4,823,108 Display system and memory architecture and method for displaying images in windows on a video display 87 1988
 
REFLECTION TECHNOLOGY, INC. (1)
5,136,695 Apparatus and method for updating a remote video display from a host computer 68 1989
 
SAMSUNG ELECTRONICS CO., LTD. (1)
5,515,494 Graphics control planes for windowing and other display operations 30 1994
 
TEKTRONIX, INC. (1)
5,185,599 Local display bus architecture and communications method for Raster display 61 1990

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
BROADCOM CORPORATION (47)
6,927,783 Graphics display system with anti-aliased text and graphics feature 5 1999
6,744,472 Graphics display system with video synchronization feature 26 1999
6,738,072 Graphics display system with anti-flutter filtering and vertical scaling feature 14 1999
6,700,588 Apparatus and method for blending graphics and video surfaces 34 1999
6,661,427 Graphics display system with video scaler 23 1999
6,630,945 Graphics display system with graphics window control mechanism 11 1999
6,608,630 Graphics display system with line buffer control scheme 8 1999
6,570,579 Graphics display system 60 1999
7,446,774 Video and graphics system with an integrated system bridge controller 4 2000
6,975,324 Video and graphics system with a video transport processor 34 2000
6,853,385 Video, audio and graphics decode, composite and display system 58 2000
6,768,774 Video and graphics system with video scaling 27 2000
6,636,222 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 57 2000
6,573,905 Video and graphics system with parallel processing of graphics windows 97 2000
6,538,656 Video and graphics system with a data transport processor 131 2000
6,529,935 Graphics display system with unified memory architecture 3 2000
6,819,330 Graphics display System with color look-up table loading mechanism 1 2001
6,781,601 Transport processor 45 2002
6,721,837 Graphics display system with unified memory architecture 7 2002
6,870,538 Video and graphics system with parallel processing of graphics windows 15 2003
7,057,622 Graphics display system with line buffer control scheme 1 2003
7,277,099 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 6 2003
7,530,027 Graphics display system with graphics window control mechanism 3 2003
7,538,783 Graphics display system with video scaler 2 2003
7,002,602 Apparatus and method for blending graphics and video surfaces 3 2003
7,015,928 Graphics display system with color look-up table loading mechanism 1 2004
6,879,330 Graphics display system with anti-flutter filtering and vertical scaling feature 3 2004
7,991,049 Video and graphics system with video scaling 0 2004
7,227,582 Graphics display system with video synchronization feature 2 2004
7,365,752 Video and graphics system with a single-port RAM 11 2004
8,063,916 Graphics layer reduction for video composition 1 2004
7,110,006 Video, audio and graphics decode, composite and display system 22 2004
7,071,944 Video and graphics system with parallel processing of graphics windows 1 2005
7,098,930 Graphics display system with anti-flutter filtering and vertical scaling feature 5 2005
7,184,058 Graphics display system with anti-aliased text and graphics feature 4 2005
7,667,710 Graphics display system with line buffer control scheme 1 2006
7,659,900 Video and graphics system with parallel processing of graphics windows 2 2006
7,667,715 Video, audio and graphics decode, composite and display system 6 2006
7,310,104 Graphics display system with anti-flutter filtering and vertical scaling feature 4 2006
7,746,354 Graphics display system with anti-aliased text and graphics feature 0 2006
7,545,438 Graphics display system with video synchronization feature 2 2007
7,848,430 Video and graphics system with an MPEG video decoder for concurrent multi-row decoding 6 2007
7,554,553 Graphics display system with anti-flutter filtering and vertical scaling feature 3 2007
7,554,562 Graphics display system with anti-flutter filtering and vertical scaling feature 1 2007
7,920,151 Graphics display system with video scaler 0 2009
8,390,635 Graphics accelerator 0 2010
8,199,154 Low resolution graphics mode support using window descriptors 0 2011
 
QUALCOMM INCORPORATED (4)
6,731,295 Graphics display system with window descriptors 6 1999
6,661,422 Video and graphics system with MPEG specific data transfer commands 52 2000
7,256,790 Video and graphics system with MPEG specific data transfer commands 16 2003
7,598,962 Graphics display system with window descriptors 0 2004
 
AMERICAN MEGATRENDS, INC. (1)
7,868,896 Method, apparatus, and computer-readable medium for utilizing an alternate video buffer for console redirection in a headless computer system 0 2005
 
CALLAHAN CELLULAR L.L.C. (1)
6,912,615 Control means for burst access control 11 2002
 
CHIRAZ, ROBERT CARMINE (1)
6,411,302 Method and apparatus for addressing multiple frame buffers 51 1999
 
CSR TECHNOLOGY INC. (1)
6,466,220 Graphics engine architecture 48 1999
 
FUJITSU LIMITED (1)
7,228,322 Data management apparatus of switching system 0 2000
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6,473,103 Conveying urgency via a control 13 1999
 
KINGLITE HOLDINGS INC. (1)
6,222,562 Fast processed screen image 8 1998
 
SCIMED LIFE SYSTEMS, INC. (1)
7,911,483 Graphics display system with window soft horizontal scrolling mechanism 0 1999
 
VITIE INC. (1)
7,830,388 Methods and apparatus of sharing graphics data of multiple instances of interactive application 6 2007
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (6)
7,484,247 System and method for protecting a computer system from malicious software 14 2004
RE43528 System and method for protecting a computer system from malicious software 0 2010
RE43500 System and method for protecting a computer system from malicious software 0 2010
RE43103 System and method for protecting a computer system from malicious software 2 2010
RE43529 System and method for protecting a computer system from malicious software 0 2010
RE43987 System and method for protecting a computer system from malicious software 0 2011