Patents by Inventor Paul Seung Ho Chang

Paul Seung Ho Chang 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).

  • High-yield multi-threading method and apparatus for video encoders/transcoders/decoders with dynamic video reordering and multi-level video coding dependency management
    Patent number: 8340194
    Abstract: Disclosed is an exemplary video coder and video coding method according to an embodiment of the present invention. The exemplary video coder includes a scheduler, a plurality of processors and a multiplexer. The scheduler can examine processing units in an input buffer to determine an order for the processing unit to be coded by a processor. If the processing unit under examination depends on a processing unit not yet processed, the processing unit under examination can be merged with other processing units, if any, that share a similar dependency. If the processing unit under examination does not depend on any processing units not yet processed, it can be sent to a next available processor for coding. When a processing unit is sent to a processor, any merged processing units that depend on sent processing unit can also be sent to a next available processor.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: December 25, 2012
    Assignee: Apple Inc.
    Inventors: Jochen Christian Schmidt, Paul Seung Ho Chang, Chris Yoochang Chung, Christian Luc Duvivier, Ionut Hristodorescu, Hsi-Jung Wu, Dazhong Zhang, Xiaosong Zhou
  • HIGH-YIELD MULTI-THREADING METHOD AND APPARATUS FOR VIDEO ENCODERS/TRANSCODERS/DECODERS WITH DYNAMIC VIDEO REORDERING AND MULTI-LEVEL VIDEO CODING DEPENDENCY MANAGEMENT
    Publication number: 20090310685
    Abstract: Disclosed is an exemplary video coder and video coding method according to an embodiment of the present invention. The exemplary video coder includes a scheduler, a plurality of processors and a multiplexer. The scheduler can examine processing units in an input buffer to determine an order for the processing unit to be coded by a processor. If the processing unit under examination depends on a processing unit not yet processed, the processing unit under examination can be merged with other processing units, if any, that share a similar dependency. If the processing unit under examination does not depend on any processing units not yet processed, it can be sent to a next available processor for coding. When a processing unit is sent to a processor, any merged processing units that depend on sent processing unit can also be sent to a next available processor.
    Type: Application
    Filed: June 5, 2009
    Publication date: December 17, 2009
    Applicant: APPLE INC.
    Inventors: Jochen Christian SCHMIDT, Paul Seung Ho CHANG, Chris Yoochang CHUNG, Christian Luc DUVIVIER, Ionut HRISTODORESCU, Hsi-Jung WU, Dazhong ZHANG, Xiaosong ZHOU