Cobalt Digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder - Manual (Page 29)

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9223-OM (V2.0)
•
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.
Group SD-SDI DID HD-SDI DID
Group 1 0x2FF 0x2E7
Group 2 0x1FD 0x1E6
Group 3 0x1FB 0x1E5
Group 4 0x2F9 0x2E4
• 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.
•
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
option is offered in addition to the previous choices. Note that AAC-LC requires
additional licensing. The two variants for this control are depicted below.
•
Mode: The available choices for this parameter depend on the Audio Encoding
selection, as follows:
o MPEG-1 Layer II: the available modes are Stereo or Single Channel. If you
select Single Channel (Mono), only the audio connected to the Left input will be
encoded.
o AAC-LC: the available modes are Stereo, Mono, or Dual Mono. If you select
Mono, only the audio connected to the Left input will be encoded.
o Dolby Passthrough: This parameter is not displayed.
•
Audio Bit Rate: The format of this parameter is a function of the Audio Encoding
setting. For MPEG-1 Layer II, this parameter is a drop-down list of valid discrete bit
rates; the values in the list are also a function of the Mode Setting. For AAC-LC, the
range is 112 to 512 kb/s for Stereo and Dual Mono, and 56 to 256 kb/s for Mono. This
parameter is not displayed for Dolby Passthrough as the 9223 will automatically detect
the incoming audio bit rate.