Auxiliary video data slicer

Details Auxiliary video data slicer Auxiliary video data slicer

H - Electricity

04

N

H04N 7/035 (2006.01) H04N 7/093 (1990.01)

Patent

CA 2131711

A data slicer for extracting auxiliary video data from a video signal adapts (212, 215) a data slicing level to the amplitude of the data signal as indicated by the average value of a run-in clock (RIC) signal that is included in the video signal. Control (200, 220, 250) of the slicing level occurs during a window interval (RICWND) that spans an integral number of cycles of the RIC signal. The presence of the RIC signal within the window interval may be verified (200, 220) as part of the slicing level ad- justment operation. The data slicer is suitable for implementation in a digital integrated circuit.

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