Extron Electronics DSC HD-3G A User Guide - Manual (Page 37)

• Two-channel Digital Mode: In this mode, you can select a channel group, then
one pair of AES channels from that group to embed, using either the
SDI Audio
Decode option of the Audio menu or SIS commands (see the Audio Input Format
commands on page 57. To select a channel pair:
1. Press the t and  buttons to select the group number ( 1 through 4 ).
2. Press the  and

buttons to select the channel pair number ( 1 or 2).
• Eight-channel Digital (Full Digital) Mode: In this mode, the first four pairs (eight
channels, groups 1 and 2) are embedded (see the table below). You are not able to
select a channel pair.
Group SDI Embedded Audio HDMI Audio Signal
1 Pair 1 — Channel 1 L – Left speaker
Pair 1 — Channel 2 R – Right speaker
Pair 2 — Channel 1 LFE – Low frequency extension (woofer)
Pair 2 — Channel 2 C – Center
2 Pair 1 — Channel 1 LS – Left surround
Pair 1 — Channel 2 RS – Right surround
Pair 2 — Channel 1 SBL – Surround back left
Pair 2 — Channel 2 SBR – Surround back right
3 Pair 1 — Channel 1 Reserved for future use
Pair 1 — Channel 2 Reserved for future use
Pair 2 — Channel 1 Reserved for future use
Pair 2 — Channel 2 Reserved for future use
4 Pair 1 — Channel 1 Reserved for future use
Pair 1 — Channel 2 Reserved for future use
Pair 2 — Channel 1 Reserved for future use
Pair 2 — Channel 2 Reserved for future use
DSC HD-3G A: Audio Embedding
In PCM multi-channel mode, the DSC HD-3G A embeds up to eight channels of PCM
HDMI audio onto the first four pairs of AES channels on the SDI output, in sequential
order. In LPCM two-channel mode, the first pair of SDI audio channels is used (you cannot
select a channel pair on the DSC HD-3G A).
All audio inputs on the DSC HD-3G A are automatically delayed to compensate for
internal video processing.
The table below shows the channel pair mapping for the DSC HD-3G A.
SDI Embedded Audio HDMI Audio Signal
Pair 1 – Channel 1 L – Left speaker
Pair 1 – Channel 2 R – Right speaker
Pair 2 – Channel 1 LFE – Low frequency extension (woofer)
Pair 2 – Channel 2 C – Center
Pair 3 – Channel 1 LS – Left surround
Pair 3 – Channel 2 RS – Right surround
Pair 4 – Channel 1 SBL – Surround back left
Pair 4 – Channel 2 SBR – Surround back right
DSC 3G-HD A and DSC HD-3G A • Operation 31