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This site is the registration authority for AC-4 EMDF payload identifiers
(“EMDF Payload IDs”).
EMDF (Extensible Metadata Delivery Format) is an extensible structure for
metadata delivery defined in ETSI TS 103 190-1 Digital Audio Compression (AC-4)
Standard. This format is based on structuring metadata into payloads that are
compatible with the EMDF structure. Each payload is tagged with a specific
payload identifier (payload ID) to provide an unambiguous indication of the type
of data present in the payload. Interoperation of bitstreams containing EMDF
payloads relies on unique payload IDs to prevent conflicts.
As indicated in ETSI TS 103 190-1 payload IDs not assigned in ETSI TS 103 190-1,
or sources specifically referenced by ETSI TS 103 190-1, may be assigned a
payload ID via the AC-4 EMDF registration authority, represented by this site.
On this site you may:
•find assignment of EMDF payload IDs for payload types that have already been
registered
•request an EMDF payload ID for a payload type
•find information and sources of documentation for payload IDs that have been
registered
There is no cost for using this service. Dolby Laboratories operates this for
the benefit of the standards community.