Television – Two-way video and voice communication – Transmission control
Reexamination Certificate
2007-04-17
2007-04-17
Ramakrishnaiah, Melur (Department: 2614)
Television
Two-way video and voice communication
Transmission control
C348S014120, C348S014080
Reexamination Certificate
active
09846508
ABSTRACT:
There is provided herein a system for reducing artifacts associated with multi-threaded video coding. The system generates a virtual thread from the multi-threaded data. The virtual thread combines the multi-thread data with estimates of virtual thread data in a manner that variably weights the combination according to motion information decoded from the multi-thread. A post-processing system is described that generates a single, virtual thread of video data, based upon image and motion data from a plurality of different threads in a multi-threaded video stream. The system estimates motion vectors for the virtual thread, generates frames of estimated video data, and applies the estimated frames to a filter. The filter generates an output that combines each new estimated frame with the current reference frame on a pixel-by-pixel basis. Pixel values generated by the filter are weighted between the values of the estimated frame and the current reference frame in a manner that brings an error function for the pixels below a threshold that may vary according to a degree of motion present in the plurality of different threads.
REFERENCES:
patent: 5920356 (1999-07-01), Gupta et al.
patent: 5969766 (1999-10-01), Kim
patent: 6744924 (2004-06-01), Hannuksela et al.
patent: 6807231 (2004-10-01), Wiegand et al.
Polycom, Inc.
Ramakrishnaiah Melur
Wong Cabello Lutsch Rutherford & Brucculeri LLP
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