OPERATION
Options Window
350-9047 v3.0.1 DGy Model 201x User’s Guide 46
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frame is used; the client receiving the compressed data repeats the
current anchor frame until a new one is received. This frame repeat
pr0cess reduces network bandwidth as transmission of new frames is
not performed.The level of contrast in an image and the degree of
motion between frames are factors in setting interframe compression
parameters.
When the Interframe compression settings button on the Streaming
tab is clicked, the Interframe Compression adjustment window opens.
See Figure 3-14.
Figure 3-14 Interframe Compression Adjustment Window
Check Enable interframe compression to use interframe compression
during multicast streaming.
Interframe compression parameter values may be entered by typing a
number in the box, using the arrows to increase or decrease a value, or
by using the slider. Interframe compression parameters are:
•Sensitivity - The DGy 201x evaluates changes by examining
blocks of pixels. This parameter sets the number of block
changes which will trigger the transmission of a new anchor
frame. Sensitivity may be set to a number between 0 and 255
with a default of 4.
SExample: A 1600 x 1200 has about 60,000 pixel blocks. If
the sensitivity is set to 20 and only 10 blocks have changed
edge state since the previous frame, then the sensitivity
value will not have been exceeded and a new frame is not
sent. If the sensitivity is set to 20 and 400 blocks have
changed, the sensitivity level has been exceeded and a new
anchor frame is transmitted.