The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 2004
Filed:
Sep. 28, 1999
Carl Ketcham, Salt Lake City, UT (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus for improving the playback quality of audio/video streams encoded for transmission using low frame rate motion compensated coding. When a transmitting system sends an audio/video stream encoded using low frame rate motion compensated waveform, a receiving system may decode and then re-encode the stream to perform a more exhaustive search for new motion vectors that were not detected by the transmitting system. The method and system further provides improved motion compensated interpolation processes that the receiving system may use in conjunction with, or separately from re-encoding of an audio/video stream to produce a better quality playback of the stream. The method and system is particularly useful for video conferencing sessions transmitted at low rates using H.263 standard, but may be useful in other scenarios as well.