May 26, 2018

Free library for decoding ATSC A/52 streams, aka AC-3

[ from developer’s site ] It is a free library for decoding ATSC A/52 streams, aka AC-3. The A/52 standard is used in a variety of applications, e.g., digital television and DVD. The main goals in liba52 development are

Portability - most of the code is written in C, and when we use platform-specific optimizations we always have a generic C routine to fall back on.

Reusability - we do not want liba52 to include any project-specific code, but it should still include enough features to be used by very diverse projects.

Precision - We are trying to implement all of the A/52 standard, and to have a very precise output by doing all the calculations in floating point. We have a test suite that detects any deviation in the output when compared to previous versions. We do not have access to official A/52 test vectors though, so we have to use our judgement to ensure that such deviations are only introduced when we fix bugs!

Speed - liba52 is really fast, on any modern PC it should take only a few percent of CPU time.

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