2010/1/9 Tony Nelson <tonynelson@xxxxxxxxxxxxxxxxx>: > According to that reference, Dirac is a typical lossy encoding method. > The loss is introduced by the Quantization step, while the compression > comes from entropy-coding the quantized (decimated) data with > Arithmetic Coding. Yes, that's with lossy compression on top of wavelets, as opposed to discrete cosine transformations, according to Wikipedia. However the website (and BBC site) say that it can employ lossless compression: "Dirac has the capability of compressing high resolution files for production, compression for broadcast content, and compression for web 2.0 applications. Compression can be either lossless or visually lossless." "http://www.bbc.co.uk/rd/projects/dirac/uses.shtml"; When I played with it a while back, I'm pretty sure there was an option for lossless. -c -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
