Patents by Inventor David Lindbergh

David Lindbergh 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).

  • Method and apparatus for improving the average image refresh rate in a compressed video bitstream
    Patent number: 8374236
    Abstract: An apparatus and method for digital video encoding is disclosed. The disclosed system provides for a way of improving video quality for a given video coding system design.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: February 12, 2013
    Assignee: Polycom, Inc.
    Inventors: John Sievers, Stephen Botzko, David Lindbergh, Charles M. Crisler
  • Method and Apparatus For Improving The Average Image Refresh Rate in a Compressed Video Bitstream
    Publication number: 20120200663
    Abstract: An apparatus and method for digital video encoding is disclosed. The disclosed system provides for a way of improving video quality for a given video coding system design.
    Type: Application
    Filed: April 20, 2012
    Publication date: August 9, 2012
    Applicant: POLYCOM, INC.
    Inventors: John Sievers, Stephen Botzko, David Lindbergh, Charles M. Crisler
  • Method and apparatus for improving the average image refresh rate in a compressed video bitstream
    Publication number: 20050201469
    Abstract: An apparatus and method for digital video encoding is disclosed. The disclosed system provides for a way of improving video quality for a given video coding system design.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 15, 2005
    Inventors: John Sievers, Stephen Botzko, David Lindbergh, Charles Crisler
  • System and method for compressing transmitted or stored data
    Patent number: 4870662
    Abstract: Disclosed is a system and method for compressing data that ranks received data characters according to their frequency of occurrence in the preceding data stream. Each time a character is input to the system, the table of rankings of each character is updated through use of a bubbler system, which does a simple exchange between the input character and a character. After a significant portion of data has been read, the table will substantially reflect the relative ranks of the various characters. A set of probability pointers divides the various ranks into several ranges, and each time a new character is input and the rank of that character is altered, the probability pointers are also updated. In this fashion, the system can readily adapt to change in the type of data in the input stream. On the decompression side, similar tables are set up, with the ranks and the probability pointers constantly being updated after the receipt of each coded symbols.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: September 26, 1989
    Assignee: Concord Data Systems, Inc.
    Inventors: David Lindbergh, Brant M. Helf