Method and apparatus for generating a spiral curve television te

Details Method and apparatus for generating a spiral curve television te Method and apparatus for generating a spiral curve television te

1991-12-10

1993-09-14

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358139, 345 2, H04N 1700, H04N 1702

Patent

active

052454134

ABSTRACT:
A test pattern suitable for testing high definition (HDTV) television signals is described as well as a method and apparatus for providing such a pattern on a television display apparatus. A plurality of color signals are stored in a memory device (look-up table) and each pixel of the display screen is correlated to a point on a spiral curve in order to determine a rotational angle which is used as an address for one or more of said color signals which are displayed at that pixel location. In this manner, a spiral shaped test pattern is generated having spiral color (or monochrome) segments corresponding to a spiral curve.

REFERENCES:
patent: 3230304 (1963-01-01), Schonfelder
patent: 4635096 (1987-01-01), Morgan
patent: 4914506 (1990-04-01), Kafer et al.
patent: 5115229 (1992-05-01), Shalit

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