Appendix F FLEX Decoding Module
Audio Decode Specifications
© 2012 Harmonic Inc.
57
Electra 1000, Version 3.0, Rev M
F.4 Audio Decode Specifications
Table F-3 describes the audio decode specifications FLEX module
NOTE:
Audio leveling is also supported by the FLEX decoding module. This feature defines a constant
gain adjustment for incoming audio signal.
F.4.1
Decoding Resource Considerations
A multichannel decode stream counts as 3 stereo decode streams. If no downmixing and no
dynamic level adjustment is enabled on any stream, the absolute maximum number of audio
decode streams is 8, allowed in one of these (and only these) combinations:
Up to 4 mono/stereo decode streams per FLEX decoding port
Up to one multichannel audio decode and one stereo decode stream per FLEX decoding
port
Up to 2 multichannel audio decode and 2 stereo audio decode streams on the first FLEX
decoding port
Up to 8 mono/stereo decode streams on the first FLEX decoding port (with no audio on
second port)
See Table F-4 on page 58 for information on AC-3 resource considerations.
Table F-3: FLEX Audio Decode Specifications
Feature
Support
Audio Decoding
Static Level Adjustment
Dynamic Level Adjustment
Decoding Mode
Dolby AC-3 with multichannel decoding and
downmixing
Dolby AC-3 Mono and Stereo decoding
Audio Formats (MPEG-1 Layer
II / AC-3)
Mono and stereo (2/0)
Compression Mode
(AC-3) Line mode and RF line mode
Additional Support
Support for multiple decode of the same PID (audio
decode)