Patents Assigned to SuperMac Technology
  • Patent number: 5375203
    Abstract: This video graphics display system includes an apparatus that allows any portion of the complete image to be displayed independently. Focusing on a specific area of an image, or panning, results in a significant change in the relationship between the data stored in the video memory and the arrangement of the pixels on the monitor. This display system recalculates the timing and location of the multiple data transfers necessary to display any portion of the graphics data held in memory. The required data transfers are performed through a handshake between the SMT02 and the BSR03. This handshake allows data transfers to occur during the monitor blanking period and in spite of restrictions imposed by the video memory specifications.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: December 20, 1994
    Assignee: SuperMac Technology, Inc.
    Inventor: George W. Lambidakis
  • Patent number: 5341442
    Abstract: A method and apparatus for compressing YUV color image data representing an image. The method includes the steps of generating base image data containing low frequency image information where the base image data is a function of the Y component, the U component, and the V component, and generating detail image data containing high frequency image information where the detail image data is a function of the Y component alone. The base image data can be decompressed to from a decompressed base image data that is an approximate facsimile of the original image and the detail image data can be decompressed and selectively added to the decompressed base image data to form a facsimile which more accurately duplicates the original image than the decompressed base image data alone.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: August 23, 1994
    Assignee: SuperMac Technology, Inc.
    Inventor: Peter T. Barrett
  • Patent number: 5293482
    Abstract: This video graphics display system includes an apparatus that allows any portion of the complete image to be displayed independently. Focusing on a specific area of an image, or panning, results in a significant change in the relationship between the data stored in the video memory and the arrangement of the pixels on the monitor. This display system recalculates the timing and location of the multiple data transfers necessary to display any portion of the graphics data held in memory. The required data transfers are performed through a handshake between the SMT02 and the BSR03. This handshake allows data transfers to occur during the monitor blanking period and in spite of restrictions imposed by the video memory specifications.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: March 8, 1994
    Assignee: SuperMac Technology, Inc.
    Inventor: George W. Lambidakis
  • Patent number: 5287420
    Abstract: A method and apparatus for image compression suitable for personal computer applications, which compresses and stores data in two steps. An image is captured in real-time and compressed using an efficient method and stored to a hard-disk. At some later time, the data is further compressed in non-real-time using a computationally more intense algorithm that results in a higher compression ratio. The two-step approach allows the storage reduction benefits of a highly sophisticated compression algorithm to be achieved without requiring the computational resources to perform this algorithm in real-time. A compression algorithm suitable for performing the first compression step on a host processor in a personal computer is also described. The first compression step accepts 4:2:2 YCrCb data from the video digitizer. The two chrominance components are averaged and a pseudo-random number is added to all components. The resulting values are quantized and packed into a single 32-bit word representing a 2.times.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: February 15, 1994
    Assignee: SuperMac Technology
    Inventor: Peter T. Barrett