Progressive scan television system using luminance low frequenci

Details Progressive scan television system using luminance low frequenci Progressive scan television system using luminance low frequenci

1990-11-26

1992-12-29

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, H04N 701

Patent

active

051756196

ABSTRACT:
A progressive scan processor includes an input circuit which produces a video difference signal representative of a difference between a first low frequency component derived from a current line of a video input signal and a second low frequency component derived by motion adaptive processing from a selected previous line of the video input signal. A line-rate doubling output circuit combines a line of the double line-rate difference signal with every other line of the double line-rate input signal to form a progressively scanned output signal. Advantageously, the system exhibits the relatively high vertical resolution and motion artifact immunity characteristic of motion adaptive systems as well as substantially reduced system memory requirements characteristic of "dual band" processors and it provides "dual band" processing of high and low frequency video components without the need for complementary band splitting filters having special amplitude and phase response characteristics.

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