Bicubic Artefacts

Imagination Technologies Ltd., United Kingdom

Abstract

This paper presents a new, lossy texture
compression technique that is suited to
implementation on low-cost, low-bandwidth devices
as well as more powerful rendering systems. It
uses a representation that is based on the
blending of two (or more) 'low frequency' signals
using a high frequency but low precision
modulation signal. Continuity of the low frequency
signals helps to avoid block artefacts.
Decompression costs are kept low through use of
fixed-rate encoding and by eliminating indirect
data access, as needed with Vector Quantisation
schemes. Good quality reproduction of (A)RGB
textures is achieved with a choice of 4bpp or 2bpp
representations.