Operation Manual

38
 Group, Channels: SDI embedded audio is typically divided into four groups (denoted by
Group 1 to Group 4); each group has four mono channels (2 stereo pairs), denoted by
Channels 1-2 and 3-4. These controls allow the selection of the desired group and
channel pair. In the large majority of the cases, the first stereo pair is in Group 1,
Channels 1-2, the second stereo pair is in Group 1, Channels 3-4, and so on. The Group
selection has one additional choice, labeled Custom DID. This allows the encoder to use
a non-standard embedded audio DID (this quite uncommon). If Custom DID is selected,
a new configuration option becomes available, where the DID value can be entered:
 Group DID: Enter the desired Group DID, in hexadecimal. Note that the entry will be
immediately validated and rejected if invalid. As a reference, the table below contains
the standard DIDs built into the system for Groups 1 to 4.
 Language Code: This parameter represents the 3-letter ISO 639-2 language code for the
audio, to be placed in the audio language descriptor in the PMT. For a complete list of
the language codes, see this URL:
http://www.loc.gov/standards/iso639-2/php/code_list.php
If the Output Protocol in the Encoder Connections Tab is set to RTMP, this field will not
be displayed as RTMP does not use the transport stream container.
 Audio Encoding: This parameter selects the audio encoding algorithm. The available
choices depend on the Audio Source selection. For Analog Audio, the choices are
MPEG-1 Layer II and AAC-LC. For SDI Embedded Audio, the Dolby Passthrough
Group
SD-SDI DID
HD-SDI DID
Group 1
0x2FF
0x2E7
Group 2
0x1FD
0x1E6
Group 3
0x1FB
0x1E5
Group 4
0x2F9
0x2E4