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