Display processor with color matrixing circuitry and two map mem

Details Display processor with color matrixing circuitry and two map mem Display processor with color matrixing circuitry and two map mem

1986-10-14

1988-01-12

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 13, 340703, H04N 1112, G09G 128

Patent

active

047195037

ABSTRACT:
A display processor using first and second chrominance map memories for storing values of first and second color-difference signals, each normalized respective to luminance signal. An image memory supplies, at pixel scan rate, data used to provide read-addresses to said first and second chrominance map memories and data used to describe the luminance signal. The first and second chrominance map memory read-outs are each multiplied by the luminance signal of appropriate spatial bandwidth to generate descriptions of the first and second color-difference signals i non-normalized form. These first and second color-difference signals and a full-spatial-bandwidth luminance signal are supplied to color matrixing circuitry. The color matrixing circuitry responds to these signals to provide red, green and blue drive signals to display apparatus. The display apparatus may comprise video amplifiers for the drive signals and a color kinescope, by way of example.

REFERENCES:
patent: 2854504 (1958-09-01), Lawrence
patent: 2920131 (1960-01-01), Valensi
patent: 4183046 (1980-01-01), Dalke et al.
patent: 4336345 (1983-05-01), Narveson et al.
patent: 4580134 (1986-04-01), Campbell et al.
patent: 4584597 (1986-04-01), Guichard
Color Television Standards by Donald G. Fink, pp. 213-216.

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