초록 ▼

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

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.

대표청구항 ▼

A display processor for color video signals comprising: first and second map memories addressed in parallel, for storing values of first and second chrominance-only signals respectively, each normalized respective to luminance; means for synchronously providing during display line trace intervals fi

A display processor for color video signals comprising: first and second map memories addressed in parallel, for storing values of first and second chrominance-only signals respectively, each normalized respective to luminance; means for synchronously providing during display line trace intervals first and second streams of data, the first stream of data being descriptive of display luminosity fully sampled at a given spatial density, and the second stream of data being descriptive of display chromaticity fully sampled at said given spatial density and being applied as read addresses to said first and second map memories; means responsive to said first stream of data for supplying a luminance-only signal; means responsive to the read-outs of said first and second map memories for supplying first and second color-difference signals normalized respective to luminance; means for multiplying, by said luminance signal, each of said first and second color-difference signals normalized respective to luminance, thereby to generate first and second color-difference signals; and color matrixing circuitry for linearly combining these said first and second color-difference signals with said luminance-only signal for generating video drive signals in each of three primary colors. Apparatus for generating signals descriptive of color imagery comprising: means for supplying a relatively wideband luminance signal; means for supplying first and second color difference signals having narrower spatial bandwidths than said luminance signal, in all directions; means for filtering said luminance signal to the same spatial bandwidth as each of said color difference signals; means for dividing each of said color-difference signals by luminance signal filtered to the same narrower spatial bandwidth as its own; and means responsive to the resulting quotients for generating chrominance-descriptive codes to accompany said relatively wideband luminance signal, as said signals descriptive of color imagery.