Grandstream GXV3140 User Manual - Manual (Page 40)

FIRMWARE VERSION 1.0.7.80 GXV3140 USER MANUAL Page 40 of 151
setting is Yes.
Video frame rate The Default value is 15 frames/second. The video frame rate is adjustable
based on network conditions.
Increasing the frame rate will increase the amount of transferred data
significantly therefore consuming more bandwidth. Lack of bandwidth will
impair the video due to packet loss.
Video bit rate The Default value is 128 kbps. The video bit rate is adjustable based on
network conditions.
Increasing the video bit rate may improve video quality if the bandwidth
permits.
Otherwise the video quality will be impaired due to packet loss.
Video Packet Size The Default value is 1400, range from 100 to 1400.
It is recommended to use 600~800 if you have an Outbound Proxy or
Media Gateway.
Video Rate Control Frame, TMN8 or GOP. The Default setting is Frame.
TMN8 is good for bandwidths larger than 384kbps.
Video Frame Skipping
Skips bad video frames as they are received.
The Default setting is No.
I-Frame Reference Only When enabled, all P frames will only have reference to previous I frames.
This method may improve video quality when the network has heavy packet
loss. It will have modest increase in bandwidth usage. The Default setting is
No.
Packetization-Mode The packetization mode (0 or 1) for the H.264 video packets. The default
setting is 0.
Redundant P-frame This setting allows the phone to send redundant P-frames of I frames.
When an I frame is delayed or has packet loss, the redundant P-frames will
be used instead. It may make video phone call less prone to errors and thus
make the video stream more robust towards error propagation, but may
increase bandwidth usage. The default setting is set to No.
Adaptive MB Intra Refresh This parameter specifies whether Adaptive MB Intra Refresh is used or not.
It may protect most important MBs (macro blocks) subjected to packet loss
and to avoid error propagation. The intra-refresh rate is adapted according
to the video packet loss rate. It may increase bandwidth usage. The default
setting is set to No.
Video Packet Loss Rate Specifies the phone video packet loss rate for the Adaptive MB Intra
Refresh. Users can choose from: Less than 5%, Less than 10%, Less than
15%, Less than 20%, Less than 25%. The default setting is set to Less than