Setting Up Dolby Digital Processing - Cisco D9054 Installation And Operation Manual

Setting Up Dolby Digital Processing

To Set Up the Dolby Digital Processing
Proceed as follows to set up the Audio Dolby Digital Processing:
1. From the user interface of the D9054 HD Encoder, click the Audio tab, expand
the Dolby Digital icon, expand the appropriate channel icon and click the
Processing icon from the sub-pages.
Note: The number of channels displayed depends on whether your encoder is
equipped with a Dual Channel Audio (DCA) card or a Multiple Channel Audio
(MCA) card. MCA cards provide six configurable audio channels, allowing you
to configure Ch 1 (Audio 1) through Ch 6 (Audio 6).
2. Select the Dynamic Range Control Profile (Line/RF).
Select one of the dynamic range compression presets built into the Dolby Digital
encoding/decoding algorithm to be applied to the audio stream in Line Mode or
RF Mode. Each setting reduces the audio bitstream's output to a characteristic
dynamic range.
You may select None, Film Standard, Film Light, Music Standard, Music Light
or Speech.
3. If relevant, select the 50/15 microseconds of CCITT J.17 Pre Emphasis.
By selecting the pre-emphasis you indicate that the incoming data stream has
pre-emphasis. The default is None.
4038938 Rev A D9054 HDTV Encoder Intstallation and Operation Guide 5-59