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Chapter 7 FLEX Decoding Module
Audio Specifications
FLEX-1 Modules support audio decoding and pass through. This section provides detailed
specification of feature support, and resource utilization. It has the following sections:
Audio Pass-through Specifications
n
Audio Decoding Specifications
n
Audio Decoding Resource Considerations
n
Level Magic™ Dynamic Audio Leveling
n
Audio Pass-through Specifications
Table 7–5
describes the audio pass-through specifications supported by the FLEX-1
Table 7–5: Audio Pass-through Specifications
Number of channels
Audio formats
Audio processing
Operating modes
Audio Decoding Specifications
Table 7–6
describes the audio decode specifications supported by the FLEX-1
NOTE: Audio leveling is also supported by the FLEX decoding module. This feature defines a constant
gain adjustment for incoming audio signal and is described in section
Leveling.
Table 7–6: FLEX Audio Decode Specifications
Audio Decoding Format
Audio Decoding Mode
© 2015 Harmonic Inc. All rights reserved.
Feature
n
n
n
n
n
n
n
n
n
n
Feature
n
n
n
Support
Up to 8 per video service (however, the total pass-
through bit rate per FLEX program cannot exceed
4Mbps)
MPEG1-L2 1.0 and 2.0
Dolby (AC3) 5.1 and 2.0
AAC/HE AAC 5.1 and 2.0
Audio pass through
Audio pass through of dual channel
No Fixed Audio Gain Adjustment for pass-through audio
Audio pass through with repacketization
Silence insertion during CRC errors or buffer underruns
Mono, dual channel, stereo, joint stereo, 5.1
multichannel
MPEG1-L2
a
AC-3
Mono, stereo, or multi-channel (5.1) and multichannel
(5.1) down-mix to stereo
65
Audio Specifications
Module.
Level Magic™ Dynamic Audio
Support
Electra 9200, Rev O
Module.
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