Compression of pixels in a reduced-size video image

Details Compression of pixels in a reduced-size video image Compression of pixels in a reduced-size video image

H - Electricity

04

N

350/56, 350/7

H04N 5/45 (2006.01)

Patent

CA 1240788

Abstract A pix-in-pix television display includes circuitry for reducing the amount of memory needed to hold one field of the reduced size image. In the display apparatus, digital samples representing the large and small picture signals are developed at substantially equal rates by separate circuitry. Subsampling circuitry stores one out of every five of the samples representing a horizontal line of the small picture. These samples are displayed, synchronous with the large picture at a rate three-fifths times the display rate of the large picture samples to produce an apparent size reduction of one-third in the horizontal direction.

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