Patents by Inventor David M. Pfeiffer

David M. Pfeiffer 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).

  • Patent number: 5241642
    Abstract: There is disclosed a memory controller for controlling addresses to a plurality of different memory types while treating the memory system as a whole so as to create a unified addressing arrangement. The controller is structured to allow for a reprogramming of the split address between the memories and for maintaining contiguously addressed locations. A register is used to hold the split address and the register can be updated at initialization to vary the split depending upon physical memory changes. The controller also maintains a common bit length addressing word regardless of the memory size being addressed by the system processor.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: August 31, 1993
    Assignee: Pixel Semiconductor, Inc.
    Inventors: John P. Norsworthy, David T. Stoner, Michael K. Corry, David M. Pfeiffer
  • Patent number: 5146592
    Abstract: An image processor having an image algorithm processor (66) operating under control of a writable control store (94), and a number of parallel image processors (72) operating under control of instruction words from a writable control store (100). An image memory controller (68) receives memory addresses from the image algorithm processor (66) for coordinating the reading and writing of an image memory (82) using pixel data processed by the parallel image processor set (72). The image memory controller (68) arbitrates memory address request cycles, memory refresh cycles and screen refresh cycles. The image memory (82) includes different planes (84, 86 and 88) associated with red, green and blue pixel data. Associated with each image memory plane is a video processor (106) for converting parallel image data to high speed serial image data.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: September 8, 1992
    Assignee: Visual Information Technologies, Inc.
    Inventors: David M. Pfeiffer, David T. Stoner, John P. Norsworthy, Dwight D. Dipert, Jay A. Thompson, James A. Fontaine, Michael K. Corry
  • Patent number: 5129060
    Abstract: An image processor having an image algorithm processor (66) operating under control of a writable control store (94), and a number of parallel image processors (72) operating under control of instruction words from a writable control store (100). An image memory controller (68) receives memory addresses from the image algorithm processor (66) for coordinating the reading and writing of an image memory (82) using pixel data processed by the parallel image processor set (72). The image memory controller (68) arbitrates memory address request cycles, memory refresh cycles and screen refresh cycles. The image memory (82) includes different planes (84, 86 and 88) assocated with red, green and blue pixel data. Associated with each image memory plane is a video processor (106) for converting parallel image data to high speed serial image data.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: July 7, 1992
    Assignee: Visual Information Technologies, Inc.
    Inventors: David M. Pfeiffer, David T. Stoner, John P. Norsworthy, Dwight D. Dipert, Jay A. Thompson, James A. Fontaine, Michael K. Corry
  • Patent number: 5109348
    Abstract: Disclosed is an image processor having an image algorithm processor (66) operating under control of a writable control store (94), and a number of parallel image processors (72) operating under control of instruction words from a writable control store (100). An image memory controller (68) receives memory addresses from the image algorithm processor (66) for coordinating the reading and writing of an image memory (82) using pixel data processed by the parallel image processor set (72). The image memory controller (68) arbitrates memory address request cycles, memory refresh cycles and screen refresh cycles. The image memory (82) includes different planes (84, 86 and 88) associated with red, green and blue pixel data. Associated with each image memory plane is a video processor (106) for converting parallel image data to high speed serial image data.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: April 28, 1992
    Assignee: Visual Information Technologies, Inc.
    Inventors: David M. Pfeiffer, David T. Stoner, John P. Norsworthy, Dwight D. Dipert, Jay A. Thompson, James A. Fontaine, Michael K. Corry
  • Patent number: 4985848
    Abstract: An image processor having an image algorithm processor (66) operating under control of a writable control store (94), and a number of parallel image processors (72) operating under control of instruction words from a writable control store (100). An image memory controller (68) receives memory addresses from the image algorithm processor (66) for coordinating the reading and writing of an image memory (82) using pixel data processed by the parallel image processor set (72). The image memory controller (68) arbitrates memory address request cycles, memory refresh cycles and screen refresh cycles. The image memory (82) includes different planes (84, 86 and 88) associated with red, green and blue pixel data. Associated with each image memory plane is a video processor (106) for converting parallel image data to high speed serial image data.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: January 15, 1991
    Assignee: Visual Information Technologies, Inc.
    Inventors: David M. Pfeiffer, David T. Stoner, John P. Norsworthy, Dwight D. Dipert, Jay A. Thompson, James A. Fontaine, Michael K. Corry
  • Patent number: 4955024
    Abstract: Disclosed is an image processor having an image algorithm processor (66) operating under control of a writable control store (94), and a number of parallel image processors (72) operating under control of instruction words from a writable control store (100). An image memory controller (68) receives memory addresses from the image algorithm processor (66) for coordinating the reading and writing of an image memory (82) using pixel data processed by the parallel image processor set (72). The image memory controller (68) arbitrates memory address request cycles, memory refresh cycles and screen refresh cycles. The image memory (82) includes different planes (84, 86 and 88) associated with red, green and blue pixel data. Associated with each image memory plane is a video processor (106) for converting parallel image data to high speed serial image data.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: September 4, 1990
    Assignee: Visual Information Technologies, Inc.
    Inventors: David M. Pfeiffer, David T. Stoner, John P. Norsworthy, Dwight D. Dipert, Jay A. Thompson, James A. Fontaine, Michael K. Corry