Video signal processor and method for secondary images

Details Video signal processor and method for secondary images Video signal processor and method for secondary images

1994-03-31

1995-10-17

Kostak, Victor R.

Television

Basic receiver with additional function

For display of additional information

348588, 348566, 348565, H04N 5262

Patent

active

054595282

ABSTRACT:
A processing unit (13) for providing secondary images in a video display system (10) in accordance with a choice of scaling ratios. The processing unit (13) scales the luminance component of an analog input signal by first using an analog low pass filter (22) for anti-aliasing, and then sampling (23) the data at a rate appropriate for the selected scaling ratio. The sampled data is processed by a digital filter (24), on a line-by-line basis, which provides weighted average values derived from the sampled data, on a line-by-line basis. A formatter (25) combines sampled chrominance data with the filtered luminance data, and selects lines for inclusion in the secondary image.

REFERENCES:
patent: 4656515 (1987-04-01), Christopher
patent: 4827348 (1989-05-01), Naimpally
patent: 5047857 (1991-09-01), Duffield et al.
Phillips and Nagel, "Digital Control System Analysis and Design", 1990 p. 94.

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