ETC2: Texture Compression using Invalid Combinations

Stroem, Jacob; Pettersson, Martin

ETC2: Texture Compression using Invalid Combinations

Files

049-054.pdf (1.58 MB)

Date

2007

Authors

Stroem, Jacob
Pettersson, Martin

Publisher

The Eurographics Association

Abstract

We present a novel texture compression system for improved image quality. Building on the iPACKMAN/ETC method, bit combinations that are invalid in that system are used to allow for three additional decompression modes without increasing the bit rate. These modes increase quality, especially for color edges and blocks with smoothly varying content. Due to the use of invalid bit combinations, the system, called ETC2, is backwards compatible with iPACKMAN/ETC. It outperforms S3TC/DXTC and iPACKMAN/ETC in terms of PSNR with 0.8 dB and 1.0 dB respectively, which is clearly visible to the human eye.

        @inproceedings{10.2312:EGGH/EGGH07/049-054
,
booktitle = {SIGGRAPH/Eurographics Workshop on Graphics Hardware
},
editor = {Mark Segal and Timo Aila
},
title = {{ETC2: Texture Compression using Invalid Combinations
}},
author = {Stroem, Jacob and 
Pettersson, Martin
},
year = {2007
},
publisher = {The Eurographics Association
},
ISSN = {1727-3471
},
ISBN = {978-3-905673-47-0
},
DOI = {10.2312/EGGH/EGGH07/049-054
}
}