Television – Synchronization – Locking of video or audio to reference timebase
Reexamination Certificate
2008-06-17
2008-06-17
Natnael, Paulos M (Department: 2622)
Television
Synchronization
Locking of video or audio to reference timebase
Reexamination Certificate
active
07388618
ABSTRACT:
When playing back audio/video streams, many playback devices try to recreate the audio and video clocks used for encoding. One means typically employed to recreate such clocks includes the use of a Phased Locked Loop (PLL) circuit. The audio and video should remain synchronized. However, many reasonable cost PLLs cannot recreate the exact video clock used for encoding. The synchronization of the video to the audio can be resolved by adjusting one or more of the dimensions (or other variables) that define the video being recreated. Changing the dimensions (or other variables) of the video allows for an adjustment of the output frequency of the PLL to a value that can be implemented.
REFERENCES:
patent: 5229853 (1993-07-01), Myers
patent: 5821818 (1998-10-01), Idei et al.
patent: 5825431 (1998-10-01), Walker
patent: 5995570 (1999-11-01), Onvural et al.
patent: 6049769 (2000-04-01), Holmes et al.
patent: 6317161 (2001-11-01), Renner et al.
patent: 6385267 (2002-05-01), Bowen et al.
patent: 6670994 (2003-12-01), Voltz et al.
patent: 2005/0248596 (2005-11-01), Smith et al.
“PC Video Synchronization and Playback,” www.microsoft.com/whdc/archive/VidSynch.mspx, Dec. 4, 2001.
Montrym, et al., “InfiniteReality: A Real-Time Graphics System,” Silicon Graphics Computer Systems.
Bishop, et al., “Adaptive Phase Locked Loop for Video Signal Sampling,” pp. 1664-1667, 1992 IEEE.
Pejhan, et al., “Dynamic Frame rate Control for Video Streams,” pp. 141-144, , 1999 ACM Multimedia, Orlando, FL, USA.
Jones, et al., “Handling Audio and Video Streams in a Distributed Environment,” pp. 231-243, 1993 ACM, N.C., USA.
Microsoft Corporation
Natnael Paulos M
Vierra Magen Marcus & DeNiro LLP
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