the full story can be found here: http://www.theregister.co.uk/2004/08/31 ... nses_s3tc/Sony has licensed VIA subsidiary S3 Graphics' S3TC texture compression algorithm for use in the PlayStation Portable (PSP), the two companies announced this week.
Sony licenses texture compression algorithm
Sony licenses texture compression algorithm
this is fairly old news, but it thought some of you guys might be interested as it might help in making sense of some of the files you are working with.