Teletext data separation apparatus

Details Teletext data separation apparatus Teletext data separation apparatus

2006-09-19

2006-09-19

Tran, Trang (Department: 2622)

Television

Nonpictorial data packet in television format

Including teletext decoder or display

C348S465000

Reexamination Certificate

active

07110041

ABSTRACT:
A teletext data separation apparatus has a slice level generating circuit including a slice timing control circuit, a control register, an adder and a divider. The slice timing control circuit generates a timing signal for sampling. The control register carries out ON/OFF control of the slice timing control circuit. The control register sets by its register value the number of the sampling points of the adder and divider. By varying the register value in response to the reception state, the number of the sampling points can be increased from the specified 16 points, for example. This makes it possible for teletext data separation apparatus to generate an appropriate slice level that enables the teletext data to be separated reliably even in conditions where noise or distortion occurs in the video signal because of the effect of a weak electric field or ghost.

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