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Dirac Specification

The Dirac Specification is now essentially complete. The bitstream is deemed to be frozen except for bug fixes and constraints due to levels and profiles (to be added over time). Two versions of the specification exist: Version 1 (Dirac Pro) and Version 2 (Full Dirac).

Dirac Pro is an intra-only version of Dirac and has been proposed to the Society of Motion Picture and Television Engineers (SMPTE) for standardisation as VC-2. It's suitable for professional applications e.g. in television studios or post-production. Version 1.0 is available here:

Dirac Specification Version 1.1.0 (Dirac Pro or VC-2)
PDFpdf

(Note that this is converted from Word 2003 as this is the SMPTE format of choice, and may have some minor conversion errors. The Word version is available here.)

The full Dirac specification has reached version 2.2 and is the same as Dirac Pro version 1 except that it also includes motion compensation so that it is suitable for distribution applications (broadcasting and streaming) also. It is available here:

Dirac Specification Version 2.2.0
PDFpdf

In both cases, the specification covers the stream syntax, stream parsing operations and decoding processes. It specifies both the core syntax for general operation and a "low delay" syntax for professional use.