Operating instructions

Home > SPR1100 Handbook > Introduction > Transcoder Cards > MPM1 Transcoder Card > Audio Transcoding
MPM1 Audio Transcoding
Overview
Audio data comes to the MPM by way of the internal data connections, in just the same way
as the video.
The maximum number of simultaneous audio transcodes that can be performed on a MPM is
summarised below. It is possible to mix different audio transcodes on a module, in which
case the maximum number of transcodes must be scaled accordingly.
Outputs
Inputs
MPEG-
1L2
Dolby
Digital 2.0
Dolby
Digital 5.1
AAC/HE-
AAC 2.0
AAC/HE-
AAC 5.1
MPEG-1L2
24
12
n/a
24
n/a
Dolby Digital
2.0/5.1
18
12
6
12
6
AAC/HE-AAC
2.0/5.1
12
12
6
12
6
For example, per module, it is possible to transcode
24
x
MPEG L2
to
MPEG L2
or
12
x
AAC
to
MPEG L2
or
18
x
MPEG L2
to
MPEG L2
and
3
x
AAC
to
MPEG L2
Audio Pass-Through
Audio streams can be passed through directly from the input without re-encoding (pass-
through mode). No audio licenses are required for this mode.
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