Project AES-X242 initiation

[page updated 2018-03-19]

This project was proposed by K. Terry. It was approved under our rules by Subcommittee SC-02 and assigned to the SC-02-12 Working Group on Audio applications of networks.

TITLE AES-X242, Streaming audio metadata over IP networks
SCOPE To define a standardized method for transporting metadata associated with audio in an AES67 stream. The audio metadata shall be transported in a separate stream that is sent in parallel to AES67 streams rather than part of the AES67 stream. The standard shall define synchronization between the audio metadata transport and the associated AES67 transport. The transmission method shall be low latency and have a level of network performance equivalent to AES67. Within the scope is formatting of the streaming audio metadata for transport. Suggested is an open standards based framework that supports both static and dynamic, time synchronous metadata that is optimized for live workflow applications. The standard shall consider all use cases for metadata associated with AES67, support existing AES audio metadata standards, and be extensible for future metadata requirements. The standard will consider binding between the audio metadata transport and the associated AES67 transport.
RATIONALE AES67 does not include a standardized method of transporting time synchronous audio metadata associated with the audio carried in AES67. AES41 is a standard method for conveying audio metadata that may be used with AES67, however it has limited capacity that may not be sufficient for all applications, particularly those requiring large amounts of metadata (e.g. object based audio formats). AES67 applications would benefit from a new metadata transport mechanism that is not bandwidth constrained and which supports the rich metadata sets future AES67 audio applications require.
WHO BENEFITS? Manufacturers, specifiers, and purchasers of network interfaced audio equipment.
WHY AES? The members of AES SC-02-12 have extensive knowledge of networked audio technology and are an ideal group to add metadata capability to the existing AES67 technology.
AES - Audio Engineering Society