Cisco TelePresence Server 7010 Product User Manual page 44

Field Field description
Received video: Selecting this check box allows the
flow control on TelePresence Server to request that the
video errors endpoint or endpoint group send lower
speed video if it fails to receive all the
packets which comprise the far end's
video stream.
Received video: Selecting this check box allows the
flow control TelePresence Server to request that the
based on viewed endpoint or endpoint group send lower
size speed video if the use of the video from
that endpoint does not require as high a
speed as the channel allows.
Video transmit Allows the TelePresence Server to vary
size optimization the resolution, or resolution and codec, of
the video being sent to a remote endpoint
within the video channel established to
that endpoint.
Select a setting from the drop-down list:
None: Do not allow video to be
n
optimized during transmission
Dynamic resolution only: Allow video
n
size to be optimized during
transmission
Dynamic codec and resolution: Allow
n
video size and codec to be changed
during transmission
Cisco TelePresence Server Product User Guide
Usage tips
The TelePresence Server can send these
messages to endpoints requesting that the
bandwidth of the video that they are
sending be decreased based on the
quality of video received by the
TelePresence Server.
If there is a bandwidth limitation in the path
between the endpoint/endpoint group and
the TelePresence Server, it is better for the
TelePresence Server to receive every
packet of a lower rate stream than to miss
some packets of a higher rate stream.
This setting can be overridden by the
Received video: flow control on video
errors field in an endpoint's or endpoint
group's Advanced configuration
Typically the TelePresence Server would
send a flow control message because of
this setting if the video from that endpoint
was either not being seen at all by other
conference participants or if it was being
shown only in small layout panes.
This setting can be overridden by the
Received video: flow control based on
viewed size field in an endpoint's or
endpoint group's Advanced configuration
page.
With this option enabled, the
TelePresence Server can, for instance,
decide to send CIF video within a 4CIF
channel if this will increase the viewed
video quality.
The circumstances under which
decreasing the video resolution can
improve the video quality include:
if the original size of the viewed video is
n
smaller than the outgoing channel
if the remote endpoint has used flow
n
control commands to reduce the
bandwidth of the TelePresence Server
video transmission
Typically, lowering the resolution means
that the TelePresence Server can transmit
video at a higher frame-rate.
This setting can be overridden by the
Video transmit size optimization field in
an endpoint's or endpoint group's
Advanced configuration page.
Configuration
page.
Page 44 of 151