Patents Assigned to Lambert Everest Ltd.
  • Patent number: 7792191
    Abstract: A half-pixel accuracy fast search algorithm in video coding performs a hierarchical search method for motion estimation, which initially searches integer accuracy motion vector and then continues its search sub-pixel accuracy over surrounding reconstructed sub-pixels of the integer motion vector. The term hierarchical connotes that the algorithm first calculates a minimum integer pixel location and then performs a sub-integer pixel search. The present invention obtains the integer pixel value with the lowest MAD value and then interpolates conjugate half-pixel values in a first direction. The algorithm determines which half-pixel value yields the lowest MAD value and then interpolates conjugate half-pixel values in a second direction from the previously calculated minimum MAD half-pixel location from the first direction.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: September 7, 2010
    Assignee: Lambert Everest Ltd.
    Inventor: Nyeongkyu Kwon
  • Patent number: 7257664
    Abstract: Systems and methods for adaptive error correction optimize data rate and video quality. Optimized data rate allocation is particularly important in systems that support video communication over wireless channels. By using proactive repair redundancy information, data rate may be dynamically partitioned to optimize the bandwidth capacity while supporting the highest video quality.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: August 14, 2007
    Assignee: Lambert Everest Ltd.
    Inventor: Chengdong Zhang