Sampling analog video signal for secondary images

Details Sampling analog video signal for secondary images Sampling analog video signal for secondary images

1996-08-30

1998-11-17

Hsia, Sherrie

Television

Basic receiver with additional function

For display of additional information

348566, 348568, 348588, 348448, H04N 545

Patent

active

058383859

ABSTRACT:
A data converter (13) for providing data for secondary images in a video display system (10). One embodiment (FIG. 2) provides data for a staggered pixel array, by using an A/D converter (23) to sample the data at a rate of 2
(h) times the sample rate of the main image, where 1
(h) is the horizontal scaling factor. A multiplexer (24) selects between two different sample patterns. Another embodiment (FIG. 3) provides data for progressively scanned secondary images by selecting 2
(v) times the number of lines per input field, where 1
(v) is the vertical scaling factor.

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patent: 5459528 (1995-10-01), Pettitt
patent: 5526051 (1996-06-01), Gove

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