Cobalt-digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder Manuel d'utilisateur télécharger pdf (Page 29)

29 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.

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Cobalt-digital COMPASS 9223 Dual-Channel 3G_HD_SD MPEG-4 Encoder Manuel d'utilisateur Page 29