Codecs - Polycom CX5500 Administrator's Manual

Polycom CX5500 Unified Conference Station Administrator's Guide
Parameter
video.camera.sharpness
Set sharpness level. The value range is from 0 (Lowest) to 6 (Highest).
<codecs/>
These video codecs include:
●
<profile/>
<profile/>
The table Video Profile Parameters
most use cases, the default values will be appropriate. Polycom does not recommend changing the
default values unless specifically advised to do so.
Video Profile Parameters
Parameter
video.profile.H261.annexD
Enable or disable Annex D when negotiating video calls.
video.profile.H261.CifMpi
Specify the frame rate divider that the phone uses when negotiating CIF resolution for a video call. You can enter
a value between 0-4. To disable, enter '0'. The default frame rate divider is '1'.
video.profile.H261.jitterBufferMax
The largest jitter buffer depth to be supported (in milliseconds). Jitter above this size will always cause lost
packets. This parameter should be set to the smallest possible value that will support the expected network jitter.
video.profile.H261.jitterBufferMin
The smallest jitter buffer depth (in milliseconds) that must be achieved before play out begins for the first time.
Once this depth has been achieved initially, the depth may fall below this point and play out will still continue.
This parameter should be set to the smallest possible value which is at least two packet payloads, and larger
than the expected short term average jitter.
video.profile.H261.jitterBufferShrink
The absolute minimum duration time (in milliseconds) of RTP packet Rx with no packet loss between jitter buffer
size shrinks. Use smaller values (33 ms) to minimize the delay on known good networks. Use larger values
(1000ms) to minimize packet loss on networks with large jitter (3000 ms).
video.profile.H261.payloadType
RTP payload format type for H261 MIME type.
Polycom, Inc.
Permitted Values
0 to 6
contains settings for a group of low-level video codec parameters. For
1
1
1
1
1
1
Default
3
Permitted Values
0 or 1 (default)
1 (default) to 32
(video.profile.H261.jitter BufferMin + 500ms) to
2500ms, default 2000ms
33ms to 1000ms, default 150ms
33ms to 1000ms, default 70ms
0 to 127, default 31
1.1.0
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