[M4IF Technotes] MPEG-4 Audio

[Ralph Neff]

Hi Arcin,
MPEG-4 doesn't currently include AMR in any of its
specifications.  If you're coming from the MPEG-4 world
and you want to stream speech, you'd use MPEG-4 CELP.
(This is what you'd find if you picked up the ISMA spec,
for example).
If you're interested in streaming AMR along with MPEG-4
visual, for example, you should take a look at the 3GPP
Packet-Switched Streaming specification.  This describes
audio/visual streaming over wireless (e.g. UMTS)
connections.  3GPP has for example defined extensions to
allow AMR and H.263 tracks to be included in an MP4 file.
The streaming itself is based on the various IETF payload
formats (so AMR isn't "in an MPEG-4 stream" as you posed
in your question).
-Ralph
-----Original Message-----
From: Arcin Bozkurt [mailto:arcin   atsana.com]
Sent: Thursday, May 30, 2024 10:59 AM
To: technotes   lists.m4if.org
Subject: [M4IF Technotes] MPEG-4 Audio
Can GSM-AMR be transmitted in an MPEG-4 stream?
Does have to be MPEG-4 Celp that has to be transmitted?
-arcin
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