Patents Represented by Attorney, Agent or Law Firm Douglas M. McAlliste
  • Patent number: 6563868
    Abstract: The performance of a multiphase and/or multiple amplitude receiver, such as a 64/256 quadrature amplitude modulation (QAM) receiver, is improved in the presence of single and multiple echoes. A moving window adaptive decision feedback equalizer (DFE) is provided according to the adaptive equation Cn(k+1)=Cn(k)−&Dgr;·W(k)·En(k)·Xn(k), where &Dgr; (delta) is the step size, Cn(k) is the tap value of tap n for the k symbol, En(k) is the error output at the symbol k, Xn(k) is the received signal for pre-cursor taps (FFE) and past decision output for post-cursor taps (DFE), and W(k) is the sliding window function at symbol k. In the adaptation process, some coefficients are fixed while other taps are being adapted. In particular, the adaptation is focused on a group of taps which correspond to received echoes.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: May 13, 2003
    Assignee: General Instruments Corporation
    Inventors: Qin Zhang, Shlomo Ovadia
  • Patent number: 6487721
    Abstract: A system for inserting commercials into an audiovisual bit stream by providing cue commands in response to cue tones in a pre-existing analog signal, and/or in response to control signals from an uplink (/programmer/network) site or headend (/affiliate). Firmware upgrades are provided to a digital encoder to facilitate generating spliceable bit streams and generation of cue_commands. This enables commercial insertion at an uplink site (/programmer/network) as well as at a cable television headend (/affiliate). The system provides functional compatibility between a digital bit stream and the analog cue tones. The cue commands are preferably carried in the transport layer of the bit stream so there is no need to decode and process several layers of the bit stream.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: November 26, 2002
    Assignee: General Instrument Corporation
    Inventor: Reem Safadi
  • Patent number: 6372107
    Abstract: A process for conveying vehicle bodies through a treatment tank for the surface treatment of the vehicle bodies, where the liquid of the treatment tank offers only a slight immersion resistance to the vehicle bodies during immersion and the flow velocities of the liquid relative to the submerging and emerging vehicle bodies are kept low. Prior to their introduction into the treatment tank the vehicle bodies are transferred from a standard position, in which window openings of each vehicle body are arranged above the floor pan of the vehicle body, into a headfirst position, in which the window openings of each vehicle body are arranged beneath the floor pan of the vehicle body. The vehicle bodies are subsequently introduced into the treatment tank in the headfirst position, conveyed through the treatment tank and brought out of the treatment tank again in the headfirst position.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: April 16, 2002
    Assignee: Duerr Systems GmbH
    Inventors: Hartwig Besinger, Klaus Lachenmaier, Gerhard Mogck