The Codecs Parameter for "Bucket" Media Types

Metadata

Publisher: IETF
Doc Type: Standard
Pages: 29
Abstract: Several MIME type/subtype combinations exist that can contain different media formats. A receiving agent thus needs to examine the details of such media content to determine if the specific elements can be rendered given an available set of codecs. Especially when the end system has limited resources, or the connection to the end system has limited bandwidth, it would be helpful to know from the Content-Type alone if the content can be rendered. This document adds a new parameter, "codecs", to various type/subtype combinations to allow for unambiguous specification of the codecs indicated by the media formats contained within. By labeling content with the specific codecs indicated to render the contained media, receiving systems can determine if the codecs are supported by the end system, and if not, can take appropriate action (such as rejecting the content, sending notification of the situation, transcoding the content to a supported type, fetching and installing the required codecs, further inspection to determine if it will be sufficient to support a subset of the indicated codecs, etc.) [STANDARDS-TRACK]
Publication Date: 2005-12-01
Status Note: Proposed Standard
DOI: 10.17487/RFC4281
Link: https://doi.org/10.17487/RFC4281
Author(s): Randall Gellens
David Singer
Per Frojdh
Keyword(s): Codec, Container, Audio, Video, 3GPP, 3GPP2

Latest version of IETF RFC 4281

Document Versions — IETF RFC 4281

▶ IETF RFC 4281 (2005-12-01)

THIS DOC [SUPERSEDED] [LATEST VERSION]

Normative Reference(s)

MP4REG, The MPEG-4 Registration Authority, URL: < http://www.mp4ra.org >. EXTERNAL
IETF RFC 2045 [Active*]
IETF RFC 2119 [Active*]
IETF RFC 2231 [Active*]
IETF RFC 2506 [Active*]
IETF RFC 2912 [Active*]

Bibliographic Reference(s)

3GPP.TS-26.244 — 3GPP-Formats EXTERNAL
ISO.14496-1.2004 — ISO/IEC 14496-1:2004, Information Technology — Coding of Audio-Visual Objects — Part 1: Systems EXTERNAL
ISO/IEC 14496-2:2004 [Active, Amended]
ISO/IEC 14496-3 [Active]
Third Generation Partnership Project 2, "3GPP2 File Formats for Multimedia Service", URL: < http://www.3gpp2.org/Public_html/specs/ C.S0050-0_v1.0_121503.pdf >. EXTERNAL
IETF RFC 3625 [Active*]

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Superseded by:

IETF RFC 6381 [Active*]

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IETF RFC 4281, The Codecs Parameter for "Bucket" Media Types
doi: 10.17487/RFC4281
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Referenced By

IETF RFC 4393 [Active*]
IETF RFC 6381 [Active*]