David R Barnett

US Patent:

58357297, Nov 10, 1998

Filed:

Sep 13, 1996

Appl. No.:

8/713600

Inventors:

Henry P. Moreton - Oakland CA
Michael L. Fuccio - Sunnyvale CA
Mark W. Troeller - Visalia CA
Charles F. Tuffli - Cupertino CA
David K. Barnett - Santa Clara CA

Assignee:

Silicon Graphics, Inc. - Mountain View CA

International Classification:

G06F 1700

US Classification:

39520076

Abstract:

A method and arrangement for separating interleaved luminance and chrominance color space components data in a single data stream with minimum CPU intervention is provided. In the separating circuit, the separating circuit receives as input a series of graphics/video image data composed of interleaved luminance and chrominance color space components at successive clock cycles. The separating circuit directs selected bytes of the graphics/video image data representing the luminance color space component to a first path wherein luminance component data received at two successive clock cycles are combined. Likewise, selected bytes of the graphics/video image data representing the chrominance color space component are directed to a second path wherein chrominance component data received at two successive clock cycles are combined. Then, the combined luminance and chrominance component data are output alternately. Conversely, a method and arrangement for interleaving luminance and chrominance color space components data in stored separately into a single data stream is also provided.