System and method for synchronizing multiple media devices
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United States of America Patent
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May 13, 2014
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N/A
app pub date -
Aug 8, 2011
filing date -
Apr 11, 2005
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Abstract
Multiple media devices are synchronized in a multi-media system having a computer system, a plurality of media devices, and a display system. Each media device to be synchronized receives a front-end synchronization signal that periodically increments a front-end counter. The front-end counter represents an unadjusted system time (UST). The media device obtains a frame of data to be displayed from a computer system. The media device also receives a back-end synchronization signal that periodically increments a back-end counter each time a frame of data is to he displayed. The back-end counter represents a media stream count (MSC). UST and MSC data are periodically transmitted to the computer system for analysis and use by a synchronization algorithm. Specifically, UST is transmitted to the computer system each time a frame of data is obtained, and a UST/MSC pair is transmitted to the computer system each time a frame of data is displayed. The computer system executes a synchronization algorithm that uses the transmitted UST and UST/MSC pair to maintain the media devices in a synchronized state.
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