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

Video input quality settings
When encoding and transmitting video there is a trade-off
between high resolution (sharpness) and high frame rate (motion).
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.
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.
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.
Sign in to the web interface and navigate to
D15329.08 SX20 Administrator Guide CE9.2, NOVEMBER 2017.
Configuration Configuration Peripherals
1. Go to
quality parameter to Motion.
2. Go to
Profile
3. Go to
> Threshold60fps
maximum transmitted frame rate will be 30 fps.
Call rate
[kbps]
128
256
384
576
768
1152
1472
1536
2176
3232
4736
6000
Setup > Configuration.
Maintenance
Video > Input > Connector n > Quality and set the video
Video > Input > Connector n > OptimalDefinition >
and choose the preferred optimal definition profile.
Video > Input > Connector n > OptimalDefinition
to set the threshold below which the
Resolutions and frame rate [w×h@fps] obtained for different optimal definition profiles and call rates
H.264, maximum 30 fps
Normal Medium
320×180@30 512×288@20
512×288@30 640×360@30
640×360@30 768×448@30
768×448@30 1024×576@30 1280×720@30
1024×576@30 1280×720@30 1280×720@30
1280×720@30 1280×720@30 1280×720@30
1280×720@30 1280×720@30 1920×1080@30
1280×720@30 1280×720@30 1920×1080@30
1280×720@30 1920×1080@30 1920×1080@30
1920×1080@30 1920×1080@30 1920×1080@30
1920×1080@30 1920×1080@30 1920×1080@30
1920×1080@30 1920×1080@30 1920×1080@30
39
System settings
H.264, 60 fps allowed at 512×288 and higher resolutions
High Normal Medium
512×288@30 320×180@30 512×288@20
768×448@30 512×288@30 640×360@30
768×448@30 640×360@30 512×288@60
512×288@60 768×448@60
640×360@60 768×448@60
768×448@60 1024×576@60
1024×576@60 1024×576@60
1024×576@60 1280×720@60
1280×720@60 1280×720@60
1280×720@60 1920×1080@60
1920×1080@60 1920×1080@60
1920×1080@60 1920×1080@60
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Administrator Guide
Appendices
High
512×288@30
512×288@60
640×360@60
768×448@60
1024×576@60
1280×720@60
1280×720@60
1280×720@60
1280×720@60
1920×1080@60
1920×1080@60
1920×1080@60