The container also contains metadata such as title and other tags, and perhaps an index for fast seeking. m4a audio file, which is a MPEG-4 Part 14 container containing AAC-encoded audio.
As such, the user normally doesn't have a raw AAC file, but instead has a. The term "standard" is also sometimes used for de facto standards as well as formal standards.Īudio content encoded in a particular audio coding format is normally encapsulated within a container format. Some such specifications are written and approved by standardization organizations as technical standards, and are thus known as an audio coding standard. Some audio coding formats are documented by a detailed technical specification document known as an audio coding specification. A specific software or hardware implementation capable of audio compression and decompression to/from a specific audio coding format is called an audio codec an example of an audio codec is LAME, which is one of several different codecs which implements encoding and decoding audio in the MP3 audio coding format in software.
Examples of audio coding formats include MP3, AAC, Vorbis, FLAC, and Opus. Comparison of coding efficiency between popular audio formatsĪn audio coding format (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio (such as in digital television, digital radio and in audio and video files).
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