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A Practical Guide to Video and Audio Compression by Cliff Wootton

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K

Source-Audio Formats

K.1 Relevant Audio Formats

A selection of formats that you might encounter when processing and encoding audio is enumerated in Table K-1.

K-1 A Variety of Audio Formats

Format Description

μ-Law

This is an old legacy codec for use in telephony applications. The μ-Law codec is widely available on UNIX-based systems. It may be worth being able to decode this, but it has few applications for an encoder nowadays.

a-Law A variant on the μ-Law codec also used for telephony. The a-Law codec is of little use now that we have better codecs available. Being able to decode it may gain access to some legacy audio files.
AAC format Part of the MPEG-4 standard but has been superseded by AAC+. This was originally developed as part ...

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