Horizontal sync pulse detection for video signal decoding

Details Horizontal sync pulse detection for video signal decoding Horizontal sync pulse detection for video signal decoding

2006-08-29

2006-08-29

Hsia, Sherrie (Department: 2622)

Television

Synchronization

Sync separation

C348S540000, C348S465000

Reexamination Certificate

active

07098961

ABSTRACT:
Methods and systems are described for determining a slice level used for detecting an edge of a horizontal sync pulse of a horizontal line of a video signal, where the horizontal line has a plurality of samples. An exemplary method comprises low-pass filtering the video signal to generate a plurality of filtered samples; determining a first level, wherein a predetermined number of the plurality of filtered samples have levels above the first level; determining a second level, wherein the second level is a minimum level of levels for the plurality of filtered samples; and determining the slice level by adding the first level and the second level to generate a summed level, and dividing the summed level by two to determine the slice level.

REFERENCES:
patent: 6909467 (2005-06-01), Kuzumoto et al.
patent: 2004/0095510 (2004-05-01), Suzuki et al.

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