Performance
The algorithms in the Dirac specification have been designed with the intention to provide a competitive performance as compared to state-of-the-art international standards. Whether they succeeded is an open question; while at least one comparison exists which used implementations from the second quarter of 2008 – it shows x264 scoring higher than Dirac – it is now somewhat out of date, and is in any case of questionable scientific merit. A study on the performances of the Dirac codec, dated from August 2009, finds that the quality obtained on SDTV is inferior to the H.264 output. The study mentions HD in its conclusion, but the numbers on HD are conspicuously missing.
Read more about this topic: Dirac (video Compression Format)
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