Television – Synchronization – Locking of video or audio to reference timebase
Reexamination Certificate
2005-06-21
2005-06-21
Kostak, Victor R. (Department: 2614)
Television
Synchronization
Locking of video or audio to reference timebase
C348S191000
Reexamination Certificate
active
06909468
ABSTRACT:
Received videos through A and B routes are inputted in first and second variable devices and then delayed by a first and a second frame memory by one frame to be inputted in a comparator. Alternatively, these signals A and B are further delayed by one frame by third and forth frame memories and also inputted in the comparator. The comparator compares the signals obtained by delaying the signals A, B, AF and BF by one line and one pixel, respectively, between the A and B routes with respect to all combinations so as to detect the difference between them. Then, a signal having the minimum difference is detected and a first and a second memory control signal to make the difference smaller are outputted to the first and second variable delay devices. By repeating the processing, a horizontal difference, a vertical difference and a time axial difference are gradually, and then completely, corrected including when the original amount of the difference is larger than a frame delay.
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Communication from European Patent Office dated Dec. 1, 2004 for Application No. EP 01 12 5420 enclosing European Search Report.
Kawada Ryoichi
Matsumoto Shuichi
Wada Masahiro
KDDI Corporation
Kostak Victor R.
Westerman Hattori Daniels & Adrian LLP
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