The registration is not intended to include any information on whether a
codec format is encumbered by intellectual property claims. Implementers and
authors are advised to seek appropriate legal counsel in this matter if they
intend to implement or use a specific codec format. Implementers of
WebCodecs are not required to support the Vorbis codec.
This registration is non-normative.
Status of this document
This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at https://www.w3.org/TR/.
Feedback and comments on this specification are welcome. GitHub Issues are preferred for discussion on this specification. Alternatively, you can send comments to the Media Working Group’s mailing-list, public-media-wg@w3.org (archives).
This draft highlights some of the pending issues that are still to be discussed in the working group.
No decision has been taken on the outcome of these issues including whether they are valid.
This document was published by the Media Working Group as an Editor’s Draft.
The group does not expect this document to become a W3C Recommendation.
Publication as an Editor’s Draft does not imply endorsement by W3C and its Members.
The W3C Patent Policy does not carry any licensing requirements or commitments on this document.
The description is required. It is assumed to be in Xiph
extradata format, described in [OGG-FRAMING]. This format consists in the page_segments field, followed by the segment_table field, followed by the
three Vorbis header packets, respectively the identification header, the comments
header, and the setup header, in this order, as described in section 4.2 of [VORBIS].
The sampleRate and numberOfChannels members are overridden by what the decoder finds in the identification header.
NOTE: The comments header content is not used by [WEBCODECS].
NOTE: Once the initialization has succeeded, any Vorbis packet can be decoded at
any time without error, but this might not result in the expected audio output.
Conformance requirements are expressed
with a combination of descriptive assertions
and RFC 2119 terminology.
The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL”
in the normative parts of this document
are to be interpreted as described in RFC 2119.
However, for readability,
these words do not appear in all uppercase letters in this specification.
All of the text of this specification is normative
except sections explicitly marked as non-normative, examples, and notes. [RFC2119]
Examples in this specification are introduced with the words “for example”
or are set apart from the normative text
with class="example",
like this:
This is an example of an informative example.
Informative notes begin with the word “Note”
and are set apart from the normative text
with class="note",
like this: