Horizontal compression of pixels in a reduced-size video image u

Details Horizontal compression of pixels in a reduced-size video image u Horizontal compression of pixels in a reduced-size video image u

1985-03-25

1987-04-07

Masinick, Michael A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, H04N 5272

Patent

active

046565159

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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Funk-Technik 40, 1985, No. 10, Heidelberg Helmut Mitschke "Ein Fernsehgerat fur mehrere Videosignale", pp. 409-410.
L. R. Rabiner et al., IEEE Transactions on Audio and Electronics, "Terminology in Digital Signal Processing", vol. AU-20, No. 5, Dec. 1972, pp. 325-326.
J. A. Cadzow, "Discrete-Time Systems", Prentice Hall, 1973, Chapter 9, pp. 299-302.

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