Cisco D9054 Installation And Operation Manual page 153

Setting Up the AAC Audio Input,
4. Select the Audio Coding Mode of the input signal.
Use this setting to select the number of channels and the channel format within
the encoded bit stream.
You may select Dual Mono 1+1, Single Mono 1/0, Stereo 2/0, Joint Stereo 2/0,
Mono 1/0 LR, or 3/2 (L,C,R,Ls,Rs,LFE).
Do not use Joint stereo audio coding if you want to transfer matrixed sound (i.e.
Stereo Surround sound). Use Stereo instead. If you use Joint stereo, part of the
phase information which is essential for re-creating the surround channel
information disappears.
The default setting is Stereo (
If the mode is set to Dual Mono (1+1), then two completely independent
program channels, referenced as Mono Channel 1 and Mono Channel 2, are
encoded into the bit stream. Dual-mono mode is primarily intended for
professional applications. Dual-mono cannot be expected to work with
consumer AAC decoders.
Note: The 3/2 (L,C,R,Ls,Rs,LFE) mode is only available for encoders equipped
with a Multiple Channel Audio (MCA) card.
Note: The 3/2 (L,R,C,Ls,Rs) mode is only available for Ch 1 and Ch 4.
5. Select in the Input Type field whether your audio input is digital, embedded, or
Dolby-E Decoder.
The D9054 HD Encoder inputs the signal from the Digital input connector in the
selected format. If you select Embedded the D9054 HD Encoder extracts the
audio embedded in the active HD-SDI video signal of the program.
If you select Dolby-E Decoder, you must set up the Dolby-E Decoder in the
Dolby-E Decoder page. For more information, see Setting up the Dolby-E
Decoder (MCA card only), page 5-85.
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