Cisco Headend Digital Broadband Delivery System User Guide
4002178 Rev C
Audio Options
2-7
Select the Digital Output on the Set-Top,
Continued
Set-Tops with an HDMI Output
For set-top models equipped with a High-Definition Multimedia Interface
(
HDMI)
output, when an HDMI display is connected, an additional “HDMI” choice is
activated on the General Settings menu for Audio:Digital Out. Upon connection, the
HDMI display informs the set-top of the digital audio formats that it can decode (for
example, Dolby Digital versus PCM). Selecting “HDMI” (as opposed to Other or
Dolby Digital) allows the set-top to automatically choose the format preferred by the
display. This format then appears at the HDMI output as well as at the Digital Audio
output. Your subscribers may not find this behavior optimal for their home theater
installations. See Important Note Regarding the HDMI Interface, next in this
section.
Important Note Regarding the HDMI Interface
The HDMI interface will automatically configure the audio output for a format
supported by the television. In the case where the TV that is connected to the set-top
does not support a Dolby Digital input, the HDMI interface will automatically select
a 2-channel stereo audio configuration instead of Dolby Digital. When the output is
configured for 2-channel audio, this configuration is carried over to the other digital
audio outputs of the 8300HD. This configuration prevents the subscriber’s Home
Theater System or Dolby Digital decoder from providing the full Dolby Digital
surround sound effect. The subscriber may override the automatic selection of audio
by the HDMI interface by completing the following steps.
1.
Press SETTINGS twice on the remote control to open the General Settings
menu.
2.
Press MOVE UP or MOVE DOWN to select the option Audio: Digital Out.
3.
Press MOVE RIGHT to select Dolby Digital. This setting will send Dolby
Digital audio to the HDMI, DIGITAL AUDIO OUT, and OPTICAL AUDIO
OUT connectors on the 8300HD.
Note: If the TV (video/audio monitor) connected to the 8300HD using HDMI
Note: If the TV (video/audio monitor) connected to the 8300HD using HDMI
is not Dolby Digital capable, it may not produce audio through its speakers
when the Audio: Digital Out setting on the 8300HD is set to Dolby Digital.
Subscribers can either switch the Audio: Digital Out setting back to HDMI
when they are not using the home theater or Dolby Digital decoder, or they
can connect the baseband audio outputs (OUT 1 Audio Left and Right) to the
TV.