About MediaPort 7000 support for AC-3 and Dolby E
In some cases, grounding the RS-422 at one end and running a shield around the balanced pairs can
reduce noise pickup.
About MediaPort 7000 support for AC-3 and Dolby E
The MediaPort 7000 provides pre-compressed audio support, with the ability to record and playout AC-3
and Dolby E audio pairs. As part of the Player configuration process within the SystemManager, audio
resampling can be disabled on a per “audio pair” basis.
Note the following:
• AC-3 pairs are handled automatically and dynamically by the MediaPort 7000; the user does not have
to explicitly turn off re-sampling on the selected pair. AC-3 audio can co-exist with other audio types
(e.g. AES/EBU) in an arbitrary mix of up to 8 pairs (4 channels).
• For proper operation with Dolby E, audio re-sampling must be explicitly turned off for the selected
channel pair, when material is recorded on the MediaStore. Dolby E can co-exist with other audio
types (e.g. AES/EBU) in an arbitrary mix of up to 4 audio pairs. Players can be enabled for Dolby E
support on a per audio pair basis (0 to four channel pairs).
• The MediaPort 7000 does not encode or decode AC-3 or Dolby E. Encoding must occur prior to
recording, and decoding after playing from the MediaPort.
• Improper configuration of a Player is not detected or reported by the SystemManager application.
• If you record Dolby E through a Player that is not properly configured for Dolby E, on playback an
external Dolby E decoder will not detect a valid bit stream and the result will be audio silence.
• AC-3 and Dolby E implementation assumes that audio/video alignment in the incoming (recorded)
media streams is satisfactory for subsequent playout. The audio samples will be “passed through” as
received with no attempt at realignment.
For instructions on adding audio tracks to players, refer to “Adding Audio Tracks” in the
Harmonic
SystemManager User Guide
.
MediaPort 7000 series module and license options
Find details on the various MediaPort 7000 modules and license options
NOTE:
In Spectrum 8.0 and later, software licenses are installed only on the Spectrum
video servers.
Table 7-1: MediaPort 7000 series module options
Model
H.264
proxy
MPEG-2
rec/play
DV/
DVCPRO
rec/play
AVC-Intra
rec
AVC-Intra
play
VC-3 rec/
play
ProRes
play
MIP-7100
X
X
X
X
X
MIP-7101
X
X
X
X
X
X
MIP-7300
X
X
X
X
X
MIP-7301
X
X
X
X
X
X
MIP-7600
X
X
X
X
X
X
159
Spectrum System 8.4 Installation Guide
