Apparatus and method for detecting vertical blanking interval

Television – Nonpictorial data packet in television format – Data separation or detection

Reexamination Certificate

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Details

C348S461000, C348S466000, C348S478000, C348S607000

Reexamination Certificate

active

07986370

ABSTRACT:
An apparatus and method for detecting vertical blanking intervals (VBI) is disclosed. The apparatus can identify and filter non-VBI signals, and calculate a level value for digitization corresponding to the type of television signals. The apparatus includes a detecting unit and a coupled computing unit. The detecting unit is for generating a detecting signal according to a television signal. The computing unit is for calculating a slope of the detecting signal, and for determining whether the television signal contains a clock run-in signal according to the slope.

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