Adjust The Video Quality To Call Rate Ratio - Cisco TelePresence SX20 Quick Set Administrator's Manual

Cisco TelePresence SX20 Quick Set
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Introduction

Adjust the video quality to call rate ratio

Optimal definition profile
The optimal definition profile should reflect the lighting conditions
in the video conferencing room and the quality of the camera
(video input source). The better the lighting conditions and the
better the quality of the camera, the higher the profile should be
used. In good lighting conditions, the video encoder will provide
better quality (higher resolution or frame rate) for a given call rate.
Generally, the Medium profile is recommended. However, if the
lighting conditions are very good, we recommend that you test
the endpoint on the various Optimal Definition Profile settings
before deciding on a profile. The High profile may be set in order
to increase the resolution for a given call rate.
Some typical resolutions used for different optimal definition
profiles, call rates and transmit frame rates are shown in the table.
The resolution and frame rate must be supported by both the
calling and called systems.
Threshold for sending video at 60 fps
Use the Video Input Connector n OptimalDefinition
Threshold60fps setting to decide when to allow sending video at
60 fps.
For all resolutions lower than this threshold, the maximum
transmitted frame rate will be 30 fps; for higher resolutions, 60 fps
is possible if the available bandwidth is adequate.
Video input quality settings
The Video Input Connector n Quality setting must be set to
Motion for the optimal definition settings to take any effect. With
the video input quality set to Sharpness, the endpoint will transmit
the highest resolution possible, regardless of frame rate.
D15329.03 SX20 Administrator Guide CE8.2, JUNE 2016.
Configuration Configuration Peripherals
Sign in to the web interface and navigate to
Configuration.
1. Go to Video > Input > Connector n > Quality
video quality parameter to Motion.
2. Go to Video > Input > Connector n > OptimalDefinition >
Profile and choose the preferred optimal definition profile.
3. Go to Video > Input > Connector n > OptimalDefinition
> Threshold60fps
maximum transmitted frame rate will be 30 fps.
Typical resolutions used for different optimal definition profiles, call rates and frame rates
Optimal
Frame
Definition
rate
Profile
Normal
Medium
30 fps
Normal
60 fps Medium
Maintenance
Setup >
and set the
to set the threshold below which the
256 kbps 768 kbps 1152 kbps
512 × 288 1024 × 576 1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080
640 × 360 1280 × 720 1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080
High 768 × 448 1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080 1920 × 1080
256 × 144 512 × 288 768 × 448
256 × 144 768 × 448 1024 × 576 1024 × 576 1280 × 720 1920 × 1080 1920 × 1080
High 512 × 288 1024 × 576 1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080
43
System settings
Call rate
1472 kbps 2560 kbps 4 Mbps 6 Mbps
1024 × 576 1280 × 720 1280 × 720 1920 × 1080
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