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Todd W Stock, 51Rocklin, CA

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Us Patents

System And Method For Synchronizing Multiple Media Devices

US Patent:
7996699, Aug 9, 2011
Filed:
Apr 11, 2005
Appl. No.:
11/102642
Inventors:
Michael K. Poimboeuf - San Mateo CA, US
Francis S. Bernard - Brentwood CA, US
Kevin A. Smith - Torrance CA, US
Parkson Wong - Los Altos CA, US
Todd S. Stock - Palo Alto CA, US
William R. Lawson - Reno NV, US
Assignee:
Graphics Properties Holdings, Inc. - Palo Alto CA
International Classification:
G06F 1/00
G06F 1/12
US Classification:
713400, 713500, 713503, 713600, 348497, 348500, 348513
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 be 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.

System And Method For Synchronizing Multiple Media Devices

US Patent:
2012003, Feb 9, 2012
Filed:
Aug 8, 2011
Appl. No.:
13/205149
Inventors:
Michael K. POIMBOEUF - San Mateo CA, US
Francis S. Bernard - Brentwood CA, US
Kevin A. Smith - Torrance CA, US
Parkson Wong - Los Gatos CA, US
Todd S. Stock - Palo Alto CA, US
William R. Lawson - Reno NV, US
Assignee:
Graphics Properties Holdings, Inc. - New Rochelle NY
International Classification:
G06F 1/00
G06F 1/12
US Classification:
713400
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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