Patents by Inventor Juergen M. Lutz

Juergen M. Lutz 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).

  • System and method for utilizing a two-dimensional adaptive filter for reducing flicker in interlaced television images converted from non-interlaced computer graphics data
    Patent number: 6094226
    Abstract: A system and method for conversion of graphics from computer graphics formats to television formats is disclosed. More particularly, an improved scaling and flicker reduction system and method is disclosed for scaling personal computer (PC) graphics formats into different resolution television (TV) formats and for reducing flicker due to the conversion process of interlacing non-interlaced PC graphics to match interlaced TV formats. The scaling implementation reduces line buffer requirements by using a conditional scaling technique for converting graphics from a PC resolution format to a TV resolution format. The flicker reduction implementation provides a two-dimensional adaptive filter that selects between multiple filters so that different parts of an image may have different flicker reduction and different levels of trade off between flicker reduction and resolution.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: July 25, 2000
    Assignee: Cirrus Logic, Inc.
    Inventors: Ligang Ke, Juergen M. Lutz
  • Digital carrier synthesis by counting cycles for synchronization to a reference signal that is asynchronous with respect to a digital sampling clock
    Patent number: 6052152
    Abstract: A periodic multi-bit digital signal is synthesized having a frequency that is specified by the frequency of a periodic reference signal that is asynchronous with respect to a sampling clock of the periodic digital signal. In a digital video system, for example, a digital color subcarrier is synthesized and synchronized to a reference frequency of a crystal oscillator that is asynchronous with respect to a digital system clock for the digital video system. The periodic digital signal is generated by an adjustable digital oscillator clocked by the sampling clock. The frequency or phase of the periodic digital signal is compared to the frequency or phase of the periodic reference signal to produce an adjustment value for adjusting the periodic digital signal to synchronize the periodic digital signal with the periodic reference signal. The digital oscillator, for example, generates the periodic digital signal at the sampling rate by periodically incrementing an accumulator with the adjustment value.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: April 18, 2000
    Assignee: Crystal Semiconductor Corp.
    Inventors: Ronald D. Malcolm, Jr., Juergen M Lutz
  • System and method for scaling images and reducing flicker in interlaced television images converted from non-interlaced computer graphics data
    Patent number: 5963262
    Abstract: A system and method for conversion of graphics from computer graphics formats to television formats is disclosed. More particularly, an improved scaling and flicker reduction system and method is disclosed for scaling personal computer (PC) graphics formats into different resolution television (TV) formats and for reducing flicker due to the conversion process of interlacing non-interlaced PC graphics to match interlaced TV formats. The scaling implementation reduces line buffer requirements by using a conditional scaling technique for converting graphics from a PC resolution format to a TV resolution format. The flicker reduction implementation provides a two-dimensional adaptive filter that selects between multiple filters so that different parts of an image may have different flicker reduction and different levels of trade off between flicker reduction and resolution.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: October 5, 1999
    Assignee: Cirrus Logic, Inc.
    Inventors: Ligang Ke, Juergen M. Lutz
  • Digital carrier synthesis synchronized to a reference signal that is asynchronous with respect to a digital sampling clock
    Patent number: 5808691
    Abstract: A periodic multi-bit digital signal is synthesized having a frequency that is specified by the frequency of a periodic reference signal that is asynchronous with respect to a sampling clock of the periodic digital signal. In a digital video system, for example, a digital color subcarrier is synthesized and synchronized to a reference frequency of a crystal oscillator that is asynchronous with respect to a digital system clock for the digital video system. The periodic digital signal is generated by an adjustable digital oscillator clocked by the sampling clock. The frequency or phase of the periodic digital signal is compared to the frequency or phase of the periodic reference signal to produce an adjustment value for adjusting the periodic digital signal to synchronize the periodic digital signal with the periodic reference signal. The digital oscillator, for example, generates the periodic digital signal at the sampling rate by periodically incrementing an accumulator with the adjustment value.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: September 15, 1998
    Assignee: Cirrus Logic, Inc.
    Inventors: Ronald D. Malcolm, Jr., Juergen M. Lutz