Television having luma/chroma separation apparatus

Details Television having luma/chroma separation apparatus Television having luma/chroma separation apparatus

1987-01-12

1987-10-27

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 22, H04N 978

Patent

active

047033410

ABSTRACT:
A frame comb filter includes a pair of serially-connected field memories. In the normal display mode, the first field memory stores one field of incoming composite video signal CVS and provides a field delayed video signal FDS. The second field memory stores one field of the field delayed video signal FDS and provides a frame delayed video signal FRS2. The incoming composite video signal CVS is combined with the frame delayed video signal FRS2 to generate a Y/C separated component luma signal CLS. In the zoom processing mode, the first field memory stores two fields or one frame of incoming composite video signal corresponding to the zoomed portion of the input image, and provides a frame delayed composite video signal FRS1 at its output. The incoming composite video signal CVS is combined with the frame delayed video signal FRS1 representative of the zoomed portion to produce a Y/C separated component luma signal CLS for the zoomed portion. The second field memory stores two fields or one frame of the Y/C separated luma signal CLS. The reading of the second field memory is coordinated with the horizontal and vertical display deflection circuits to produce the required magnification in the horizontal and vertical directions.

REFERENCES:
patent: 4667222 (1987-05-01), McCoy

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