MB86294 Coral B

Overview

Coral B adds video input to the features of Coral Q and is available in a BGA package. The video input is capable of accepting TV tuner, DVD player or camera signals in PAL or NTSC video formats (ITU656 format). Video pictures of diverse resolution and frame frequency rate, in either progressive or interlaced modes, are able to be grabbed, scaled and displayed picture-in-picture. The latest automotive and consumer appliance screens are increasing in resolution to achieve better readability and demand improved pictures to match for example DVD quality. In order to meet these demands, Coral integrates a new video input up-scaling facility, which now allows to display a full-screen mode of multimedia pictures at large resolutions. Both up-scaling and down-scaling can be set independently in horizontal and vertical directions in pixel or line resolutions.

Using the new Alpha-map features of the Coral architecture, the video picture can be blended smoothly together with rendered graphics. The alpha map can be freely assigned to any of the six layers and allows the assignment of 8 bits per pixel, enabling each pixel to be mixed to control transparency to a much more defined degree. In addition, all layers can be blended at a fixed ratio of 256 levels. To enhance Bit BLT (Bit Block Transfers) operations, this feature can now be combined with alpha-mapping. With this function, any bitmap can be copied from any source location (CPU- or Video-memory) and can be copied onto a layer with an independent alpha-map. Software routines which make use of this function can greatly improve image quality (for example anti-aliasing over a moving background).