Patents Assigned to DemoGraFX
  • Patent number: 6442203
    Abstract: A system and method for de-interlacing, motion compensation and frame rate conversion of digitally encoded video signals. The invention utilizes multiple motion vectors per pixel of the final image. In a preferred embodiment, this is accomplished by increasing the size of the image, with the amount of size increase depending upon the degree of sub-pixel accuracy desired. In a preferred embodiment, image size is doubled. Thus, four motion vectors are generated for each pixel. Each motion vector is found by searching independently for the best match with previous and subsequent frames.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: August 27, 2002
    Assignee: DemoGraFX
    Inventor: Gary E. Demos
  • Patent number: 5988863
    Abstract: A method and apparatus for image compression which demonstrably achieves better than 1000-line resolution image compression at high frame rates with high quality. Image material is preferably captured at an initial or primary framing rate of 72 fps. An MPEG-2 data stream is then generated, comprising: (1) a base layer, preferably encoded using only MPEG-2 P frames, comprising a low resolution (e.g., 1024.times.512 pixels), low frame rate (24 or 36 Hz) bitstream; (2) an optional base resolution temporal enhancement layer, encoded using only MPEG-2 B frames, comprising a low resolution (e.g., 1024.times.512 pixels), high fi-e rate (72 Hz) bitstream; (3) an optional base temporal high resolution enhancement layer, preferably encoded using only MPEG-2 P frames, comprising a high resolution (e.g., 2k.times.1k pixels), low frame rate (24 or 36 Hz) bitstream; (4) an optional high resolution temporal enhancement layer, encoded using only MPEG-2 B frames, comprising a high resolution (e.g., 2k.times.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: November 23, 1999
    Assignee: DemoGraFX
    Inventor: Gary E. Demos
  • Patent number: 5852565
    Abstract: A method and apparatus for image compression which demonstrably achieves better than 1000-line resolution image compression at high frame rates with high quality. Image material is preferably captured at an initial or primary framing rate of 72 fps. An MPEG-2 data stream is then generated, comprising: (1) a base layer, preferably encoded using only MPEG-2 P frames, comprising a low resolution (e.g., 1024.times.512 pixels), low frame rate (24 or 36 Hz) bitstream; (2) an optional base resolution temporal enhancement layer, encoded using only MPEG-2 B frames, comprising a low resolution (e.g., 1024.times.512 pixels), high frame rate (72 Hz) bitstream; (3) an optional base temporal high resolution enhancement layer, preferably encoded using only MPEG-2 P frames, comprising a high resolution (e.g., 2k.times.1k pixels), low frame rate (24 or 36 Hz) bitstream; (4) an optional high resolution temporal enhancement layer, encoded using only MPEG-2 B frames, comprising a high resolution (e.g., 2k.times.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: December 22, 1998
    Assignee: DemoGraFX
    Inventor: Gary E. Demos
  • Patent number: 5737027
    Abstract: An image processing system uses a pseudo-random pixel interlace method and apparatus for capturing groups of pixels as image frames. This pseudo-random method eliminates the artifacts commonly present in standard regular line raster scan imaging systems. Moreover, the pixel interlacing method permits the construction of higher resolution frames from a series of orthogonal lower resolution frames. An enhancement circuit deduces information from previous pixel group frames and contributes additional detail to the pixels of the frame being processed. The format of the pixel interlaced groups permits the present invention to be used in a wide variety of normally incompatible target display rates. The present invention can also be used in a computing system as an auto-synchronizer for processing signals from different sources.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: April 7, 1998
    Assignee: DemoGraFX
    Inventor: Gary Demos
  • Patent number: 5465119
    Abstract: An image processing system uses a pseudo-random pixel interlace method and apparatus for capturing groups of pixels as image frames. This pseudo-random method eliminates the artifacts commonly present in standard regular line raster scan imaging systems. Moreover, the pixel interlacing method permits the construction of higher resolution frames from a series of orthogonal lower resolution frames. An enhancement circuit deduces information from previous pixel group frames and contributes additional detail to the pixels of the frame being processed. The format of the pixel interlaced groups permits the present invention to be used in a wide variety of normally incompatible target display rates. The present invention can also be used in a computing system as an auto-synchronizer for processing signals from different sources.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: November 7, 1995
    Assignee: DemoGraFX
    Inventor: Gary Demos
  • Patent number: 5305324
    Abstract: An error correction and detection interface between a high speed data channel and a high capacity digital data recording tape system includes a data scrambling and translation scheme which provides an additional layer of error correction to the data as it is recorded. The data scrambling and translation scheme permits the correction of normally uncorrectable large error bursts on digital tape devices.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: April 19, 1994
    Assignee: DemoGraFX
    Inventor: Gary Demos