Types review: new parameters for audio/mpeg4-generic
Tom Taylor
tom.taylor at rogers.com
Thu Nov 20 01:15:36 CET 2008
Review is requested for the parameters defined below. These parameters are
optional additions for media type audio/mpeg4-generic. The quoted IANA
Considerations section comes from draft-ietf-avt-mps-01.txt.
Tom Taylor
AVT Co-Chair
===========================================
5. IANA Considerations
This memo defines additional optional format parameters to the Media
subtype mpeg4-generic. These parameters SHALL only be used in
combination with the AAC-lbr or AAC-hbr modes (cf. [RFC3640] section
3.3).
5.1. Media Type registration
This memo defines the following additional optional parameters which
SHALL be used if MPEG Surround data is present inside the payload of
an AAC elementary stream.
MPS-profile-level-id: A decimal representation of the MPEG
Surround Profile Level indication as defined in [14496-3]. This
parameter MUST be used in the capability exchange or session
set-up procedure to indicate the MPEG Surround Profile and Level
that the decoder must be capable in order to decode the stream.
MPS-config: A hexadecimal representation of an octet string that
expresses the AudioSpecificConfig (ASC) as defined in [14496-3]
for MPEG Surround. The ASC is mapped onto the hexadecimal octet
string in an MSB-first basis. The AOT in this ASC SHALL have the
value 30. The SSC inside the ASC MUST have the
sacPayloadEmbedding flag set to 1.
5.2. Registration of Mode Definitions with IANA
This memo defines the modes MPS-hbr and MPS-lbr.
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