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:
Aug. 11, 2009
Filed:
Jun. 24, 2005
Ross G. Cutler, Duvall, WA (US);
Alan L. Bridgewater, Issaquah, WA (US);
Ross G. Cutler, Duvall, WA (US);
Alan L. Bridgewater, Issaquah, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Audio and video frames are synchronized by hashing an audio frame at a sender and combining the resultant hash value with the video frame. The audio frame is transmitted over an audio network, such as a telephone network, and the video frame is transmitted over a digital network, such as an intranet. The audio frame may be combined with additional audio signals from an audio bridge. The receiver receives the audio signal from the audio bridge and performs the same hash function on the mixed signal as was performed on the original signal. The receiver correlates the hash value on the mixed signal with the hash value included with the video frame (wherein the video frame is one of several video frames buffered by the receiver). The receiver can thus identify the video frame that corresponds to the audio frame and render them simultaneously.