DVTEL Pro Line 9460A, Руководство пользователя

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Pro Line 9460A User’s Manual
3-8
4. Click Save to change the parameters or Reset to return to the default values.
Setting Picture Profile Parameters
Set the picture profile parameters.
To set the Picture Profile parameters
1. On the Home page of the web interface, go to the
Navigation
pane.
2. Expand the
Video
branch of the
Navigation
tree, and then select Picture Profile .
Intra Interval The frequency at which a complete video frame (called I-frame) is sent by the encoder.
Possible values are in the 0–100 range. A value of 0 indicates that no I-frame will be sent
automatically by the device; a value of X means that a complete image refresh will occur
every X frames.
Bit Rate The maximum number of bits per second generated by the device.
Valid bit rates range from 32 to 6000 kbps
Quant Min A parameter related to video quality. A higher quantizer value means less video quality but
less bit rate, and vice versa. The value range is from 2 to 31.
Quant Max A parameter related to video quality. A higher quantizer value means less video quality but
less bit rate, and vice versa. The value range is from 2 to 31.
Quality The quality of the video profile. Use the slider to adjust it to the desired quality level.Tha
value range is from 1-10.
Rate Control The mode controlling the bit rate variation. The available modes are:
•
CBR — The Constant Bit Rate mode is the most effective to maintain the target bit rate.
Video quality may suffer and the frame rate may decrease. This mode should be used
when transmitting video over networks that have very limited bandwidths, and with an
intra interval value of 0.
•
CFR — The Constant Frame Rate mode maintains the target frame rate. Video quality
may suffer and the bit rate may exceed the target value.
•
VBR — The Variable Bit Rate. In this mode, data is not sent evenly. (The rate control is
disabled and the current bit rate is a function of VBRQ and therefore the bit rate can
changes dramatically based on the video content.)
Table 3-3: Video Profile Parameters
Parameter Description