Patents by Inventor Michael Vincent Woodward

Michael Vincent Woodward 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 of inserting additional data into a compressed signal
    Patent number: 7346517
    Abstract: Many compressed audio or video frames contain silence (if audio), or a blank image (if video); these essentially information content free (e.g. silent if audio or blank if video) frames can be both detected whilst still in compressed form and then used to carry the additional data. In an MPEG implementation, subbands associated with silent frames are rendered digitally silent and then used to carry PAD (Programme Associated Data).
    Type: Grant
    Filed: February 8, 2002
    Date of Patent: March 18, 2008
    Assignee: Radioscape Limited
    Inventors: Gavin Robert Ferris, Michael Vincent Woodward
  • Method of analysing a compressed signal for the presence or absence of information content
    Publication number: 20040133420
    Abstract: Compressed signals contain amplitude data (for example, scale factors in an MPEG frame) which can be examined to enable a decision to be taken on whether the signal contains information or not (e.g. silence in the case of audio or no image in the case of video).
    Type: Application
    Filed: December 15, 2003
    Publication date: July 8, 2004
    Inventors: Gavin Robert Ferris, Michael Vincent Woodward
  • Method of inserting additonal data into a compressed signal
    Publication number: 20040114687
    Abstract: Many compressed audio or video frames contain silence (if audio), or a blank image (if video); these essentially information content free (e.g. silent if audio or blank if video) frames can be both detected whilst still in compressed form and then used to carry the additional data. In an MPEG implementation, subbands associated with silent frames are rendered digitally silent and then used to carry PAD (Programme Associated Data).
    Type: Application
    Filed: January 8, 2004
    Publication date: June 17, 2004
    Inventors: Gavin Robert Ferris, Michael Vincent Woodward
  • Method of and apparatus for converting an audio signal between data compression formats
    Publication number: 20030014241
    Abstract: Useful subband information which is present in a first audio signal (for example, MPEG 1 Layer II) is discarded in the conventional approach of format conversion, only to be regenerated when encoding to the target format (for example, MPEG 1 Layer III). Instead, in the present invention, this useful subband information is re-used directly or indirectly in order to eliminate the conventional requirement to fully decode to PCM and then encode again.
    Type: Application
    Filed: August 16, 2002
    Publication date: January 16, 2003
    Inventors: Gavin Robert Ferris, Michael Vincent Woodward