Cisco D9054 Installation And Operation Manual page 197

Setting Up the AAC Audio Program,
5. Select the audio Language Type.
This is a language descriptor which, besides the audio language above, indicates
which type of audio you transfer:
Undefined
Clean Effects
Hearing Impaired
Visually Impaired
6. Select the type of audio in the stream (AAC Type).
Select Other (specify) to enter a customized value in the AAC Type Value
below.
Select Not Used if you do not want to send this portion of the descriptor.
7. The AAC Type Value displays the value of the AAC Type specified above. If
Other (specify) was selected as the AAC Type, you must set the AAC Type
Value, in the range from 0 to 255.
8. Select the AAC LOAS Descriptor Format to use for AAC LOAS audio channels.
There are two different formats: DVB (default) or MPEG. Select Both if you
want to send DVB and MPEG descriptors.
9. Click Apply.
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Language Type
D9054 HDTV Encoder Intstallation and Operation Guide
Continued
Undefined. Used widely for the main program
sound
Expressly having no language, i.e. the sound track
without any speech.
For program speech without music and effects.
Background noise is reduced so that only one
primary sound source is perceived.
Used for audio description. Audio description is an
ancillary component associated with a TV service
which delivers a verbal description of the visual
scene as an aid to understanding and enjoyment for
e.g. viewers who have visual impairments.
Meaning
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