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
n
Audio Decoding Resource Considerations
n
Level Magic™ Dynamic Audio Leveling
Audio Pass-through Specifications
describes the audio pass-through specifications supported by the FLEX-1 Module
.
Audio Decoding Specifications
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
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