System and method for reducing frequency breadth need of transmitting graph data

Abstract

Various embodiments for reducing external bandwidth requirements for transferring graphics data are included. One embodiment includes a system for reducing the external bandwidth requirements for transferring graphics data comprising a prediction error calculator configured to generate a prediction error matrix for a pixel tile of z-coordinate data, a bit length calculator configured to calculatethe number of bits needed to store the prediction error matrix, a data encoder configured to encode the prediction error matrix into a compressed block and a packer configured to shift the compressedblock in a single operation to an external memory location.

Description

technical field The present invention relates to image data compression, more particularly to a z-axis data compression and encoding system and method. Background technique As known by those skilled in the art, 3D computer graphics in art and science are generated or rendered from 2D images of 3D objects, and then presented on a display device such as a cathode ray tube display or a liquid crystal display. This object may be a simple geometric primitive (primitive), such as a point, line, triangle, or polygon. Many complex objects can be represented by a series of connected plane polygons and rendered on the display device. For example, the objects can be represented by a series of connected plane triangles. All geometric primitives may ultimately be represented by a vertex or a set of vertices. For example, coordinates (x, y, z) may define a point, or an endpoint of a line, or a corner of a polygon. To generate a set of data for a 2D projection of a 3D primitive to be di...

AI Technical Summary

Problems solved by technology

However, the main problem is that a large triangle primitive with a relatively large pixel count is not conducive to caching in the graphics chip, so the method of providing caching becomes almost ineffective

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