Sustainability of Digital Formats
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Vorbis Audio Codec, Version I

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Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name Vorbis Audio Codec, Version I
Description Bitstream encoding format designed for efficient distribution of waveform sound over moderate bandwidth connections; may be used at higher data rates for better fidelity. From an open source project. The Vorbis specification states: " . . . a general purpose perceptual audio CODEC intended to allow maximum encoder flexibility, thus allowing it to scale competitively over an exceptionally wide range of bitrates."
Production phase Generally used for final-state, end-user delivery.
Relationship to other formats
    Used by Ogg_Vorbis, Ogg Vorbis Audio Format

Local use Explanation of format description terms

LC experience or existing holdings None.
LC preference See Ogg_Vorbis.

Sustainability factors Explanation of format description terms

Disclosure Fully documented. Developed by the Xiph.Org Foundation, a non-profit organization.
    Documentation Vorbis I specification. This version is dated February 3, 2010.
Adoption Applications include streaming broadcasts ("oggcasts") and computer games. See also Ogg and Ogg_Vorbis
    Licensing and patents None.
Transparency For "file" metadata, see Ogg. Technical metadata is included in the Vorbis stream, as described in RFC 5215, RTP Payload Format for Vorbis Encoded Audio (2008)."
Self-documentation For "file" metadata, see Ogg. Technical metadata is included in the Vorbis stream. This is described in the RTP Payload Format for Vorbis Encoded Audio. As of June, 2010, the August 2008 draft can be found at http://tools.ietf.org/html/rfc5215. Since this Web page may not be updated promptly, the link this IETF document is has not been embedded here.
External dependencies Surround sound requires appropriate amplifier and loudspeakers or headphone.
Technical protection considerations None known to the compilers of this document.

Quality and functionality factors Explanation of format description terms

Sound
Normal rendering Good support.
Fidelity (high audio resolution) From the specification: "At the high quality/bitrate end of the scale (CD or DAT rate stereo, 16/24 bits) it is in the same league as MPEG-2 and MPC. Similarly, the 1.0 encoder can encode high-quality CD and DAT rate stereo at below 48kbps without resampling to a lower rate. Vorbis is also intended for lower and higher sample rates (from 8kHz telephony to 192kHz digital masters). . . ."
Multiple channels From the specification: Supports "a range of channel representations (monaural, polyphonic, stereo, quadraphonic, 5.1, ambisonic, or up to 255 discrete channels)."
Support for user-defined sounds, samples, and patches Not supported.
Functionality beyond normal rendering Not fully investigated for this page; may be streamed as raw data under RTP (Realtime Transport Protocol).

File type signifiers Explanation of format description terms

Tag Value Note
Filename extension Not applicable.   
Internet Media Type Not applicable.   
Magic numbers Not applicable.   

Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

URLs


Last Updated: Monday, 16-Dec-2013 21:29:23 EST