Patents by Inventor Dan R. Hunt

Dan R. Hunt 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 aligning IDR frames in transcoded multi-bitrate video streams
    Patent number: 8855197
    Abstract: A video stream is transcoded to provide a plurality of primary profiles. Individual frames of the video stream have a Presentation Time Stamp (PTS). A PTS is used as a token to identify particular frames to be encoded as Instantaneous Decoder Refresh (IDR) frames in each profile. An IDR frame period is determined, indicative of a desired number of video frames between two IDR frames. An IDR frame is inserted into each profile every IDR frame period. The IDR frames of each profile are aligned with the same IDR frames of the other profiles. The PTS of each IDR frame in each profile is monitored. Upon determining that a PTS is out of alignment, the next PTS of the affected profile is aligned with the corresponding PTS of remaining profiles. Backup transcoders produce backup profiles that are maintained in alignment with each other and with the primary profiles.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: October 7, 2014
    Assignee: RGB Networks, Inc.
    Inventors: Yuval Fisher, Hain-Ching Liu, Dan R. Hunt, Shankar Venkataraman, Hsiang-Yun Alex Huang
  • INSTANTANEOUS DECODER REFRESH FRAME ALIGNED MULTI-BITRATE TRANSCODER OUTPUT
    Publication number: 20130044803
    Abstract: A video stream is transcoded to provide a plurality of primary profiles. Individual frames of the video stream have a Presentation Time Stamp (PTS). A PTS is used as a token to identify particular frames to be encoded as Instantaneous Decoder Refresh (IDR) frames in each profile. An IDR frame period is determined, indicative of a desired number of video frames between two IDR frames. An IDR frame is inserted into each profile every IDR frame period. The IDR frames of each profile are aligned with the same IDR frames of the other profiles. The PTS of each IDR frame in each profile is monitored. Upon determining that a PTS is out of alignment, the next PTS of the affected profile is aligned with the corresponding PTS of remaining profiles. Backup transcoders produce backup profiles that are maintained in alignment with each other and with the primary profiles.
    Type: Application
    Filed: August 15, 2011
    Publication date: February 21, 2013
    Applicant: RGB Networks, Inc.
    Inventors: Yuval Fisher, Hain-Ching Liu, Dan R. Hunt, Shankar Venkataraman, Hsiang-Yun Alex Huang