Cisco Headend Digital Broadband Delivery System 用户指南
4002178 Rev C
Audio Options
2-17
Disable Audio and Video Synchronization
Introduction
Some set-tops do not play audio until the video is displayed. For broadcast services,
this behavior is not an issue because broadcast services send the video in real-time
and the delay is not noticed. For services that send video as a slideshow instead of
sending it in real-time (such as Music Choice), the delay is more noticeable.
For services where the delay is noticeable, you can disable the audio and video
For services where the delay is noticeable, you can disable the audio and video
synchronization by setting the NOAVSYNC parameter. When you set this
parameter, audio begins as soon as the channel is tuned; the visual component of
channel appears as soon as the system downloads a full video frame. The
NOAVSYNC parameter is applicable only when the watchtv application is used to
present the service.
The NOAVSYNC parameter has no effect on the Explorer 3250HD set-top and DVR
The NOAVSYNC parameter has no effect on the Explorer 3250HD set-top and DVR
set-tops. Audio is always played when it is available on these set-tops.
Disabling Audio and Video Synchronization for Services
Follow these instructions to disable audio and video synchronization for services.
1.
On the DNCS Administrative Console, click the Application Interface
Modules tab.
2.
Click SAM Service.
Result: The SAM Service List window opens.
Result: The SAM Service List window opens.