Vorbis
Vorbis is a free and lossy audio compression format that was officially released in the summer of 2002. In terms of functionality and quality, it is similar to codecs like AAC, AC3 and VQF, superior to MP3. The psychoacoustic model used in Vorbis is similar in principle to MP3 and the like, but the mathematical processing and practical implementation of this model are significantly different, which allowed the authors to declare its format completely independent of all predecessors.
Container
For storing audio data in Vorbis format, the Ogg media container is most frequently used, such a file usually has the extension .ogg and is named with the double name “Ogg / Vorbis” [1] or ” Ogg Vorbis “[2]. However, “Ogg Vorbis” is also called a codec by itself without a container, as it is part of the Ogg project [1].
Request
In 2020, it is much less widespread than MP3. Used in computer games, for podcasts.
Vorbis is ideal for use as movie soundtracks, as it does not change in length when the bit rate is variable, allowing you to stay in sync with the video track and is applicable for multi-channel sound (e.g. 6-channel audio). channels).
It is used for the audio track of WebM files in conjunction with the VP8 video codec (since VP9, support for the new free Opus codec has been added to the format).
Metadata
The format was originally designed with streaming capabilities. This gives the format a rather useful side effect: multiple songs can be stored in one file with their own tags. When loading such a file into the player, all songs should be displayed as having been loaded from several different files.
The format has a flexible labeling system. The tag header can easily be expanded to include lyrics of any length and complexity (such as song lyrics), interspersed with images (such as album cover photos). Text labels are stored in UTF-8, which allows writing in multiple languages at the same time and eliminates potential encoding problems.
Bitrate
Ogg Vorbis uses a variable bitrate by default, while the latter is not limited to hard values and can vary even by 1 kbps. It should be noted that the maximum bit rate is not strictly limited by the format, and with the maximum encoding setting it can range from 500 to 1000 kbps. The sample rate has the same flexibility: users can choose between 2 and 192 kHz.
Development objective
Vorbis was developed by the Xiph.Org community to replace all paid proprietary audio formats. Despite being the youngest format of all MP3 competitors, Ogg Vorbis has full support on all popular platforms (Microsoft Windows, Linux, Apple Mac OS, Android [3], PocketPC, Palm, Symbian, DOS, FreeBSD, BeOS and etc.), as well as a large number of hardware implementations.
