Cisco TelePresence System Quick Set C20 Administrator's Manual page 60

Cisco TelePresence System Quick Set C20 and Profiles using C20
Contents Introduction
Video Input Source [1..2] OptimalDefinition Profile
The Video Input Source Quality setting must be set to Motion for the optimal definition settings to
take any effect.
The optimal definition profile should reflect the lighting conditions in your room and the quality of
the video input (camera); the better the lighting conditions and video input, the higher the profile.
Then, in good lighting conditions, the video encoder will provide better quality (higher resolution or
frame rate) for a given call rate.
Generally, we recommend using the Normal or Medium profiles. However, when the lighting
conditions are good, the High profile can 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 below. It is assumed that dual video is not used. The resolution must
be supported by both the calling and called systems.
Use the Video Input Source OptimalDefinition Threshold60fps setting to decide when to use the 60
fps frame rate.
Typical resolutions used for different optimal definition profiles, call rates and frame rates
Optimal
Frame
Definition
rate
Profile
256 kbps 768 kbps
Normal 512 × 288 1024 × 576
Medium 640 × 360 1280 × 720
30 fps
High 768 × 448 1280 × 720
Normal 256 × 144 512 × 288
60 fps Medium 256 × 144 768 × 448
High 512 × 288 1024 × 576
.
Requires user role: ADMIN
Value space: <Normal/Medium/High>
Normal: Use this profile for a normally to poorly lit environment. Resolutions will be set rather
conservative.
Medium: Requires good and stable lighting conditions and a good quality video input. For some
call rates this leads to higher resolution.
High: Requires nearly optimal video conferencing lighting conditions and a good quality video
input in order to achieve a good overall experience. Rather high resolutions will be used.
Example: Video Input Source 1 OptimalDefinition Profile: Normal
D14637.08 Profile C20 and Quick Set C20 Administrator Guide TC5.1, February 2012.
Copyright © 2010-2012 Cisco Systems, Inc. All rights reserved.
Web interface
Call rate
1152 kbps 1472 kbps 2560 kbps 4 Mbps
1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080
1280 × 720 1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080
1280 × 720 1920 × 1080 1920 × 1080 1920 × 1080 1920 × 1080
768 × 448 1024 × 576 1280 × 720 1280 × 720
1024 × 576 1024 × 576 1280 × 720 1280 × 720
1280 × 720 1280 × 720 1280 × 720 1280 × 720
Advanced settings Advanced settings Password protection
Video Input Source [1..2] OptimalDefinition Threshold60fps
For each video input, this setting tells the system the lowest resolution where it should transmit
60fps. So for all resolutions lower than this, the maximum transmitted framerate would be 30fps,
while above this resolution 60fps would also be possible, if the available bandwidth is adequate.
Requires user role: ADMIN
Value space: <512_288/768_448/1024_576/1280_720/Never>
512_288: Set the threshold to 512x288.
768_448: Set the threshold to 768x448.
1024_576: Set the threshold to 1024x576.
1280_720: Set the threshold to 1280x720.
Never: Do not set a threshold for transmitting 60fps.
Example: Video Input Source 1 OptimalDefinition Threshold60fps: 1280_720
Video Input Source [1..2] Quality
When encoding and transmitting video there will be a trade-off between high resolution and
high framerate. For some video sources it is more important to transmit high framerate than high
resolution and vice versa. The Quality setting specifies whether to give priority to high frame rate or
to high resolution for a given source.
Requires user role: ADMIN
6 Mbps
Value space: <Motion/Sharpness>
Motion: Gives the highest possible framerate. Used when there is a need for higher frame rates,
typically when a large number of participants are present or when there is a lot of motion in the
picture.
Sharpness: Gives the highest possible resolution. Used when you want the highest quality of
1280 × 720
detailed images and graphics.
1280 × 720
Example: Video Input Source 1 Quality: Motion
1280 × 720
Video DefaultPresentationSource
Define which video input source shall be used as the default presentation source (when you
press the Presentation key on the remote control). The input source is configured to a video input
connector.
Requires user role: USER
Value space: <1/2>
Range: Select the video source to be used as the presentation source.
Example: Video DefaultPresentationSource: 2
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