Digital Watchdog MEGApix DWC-MV85WiAT - Page 21

Ϯϭ
6 GOP(Group of Pictures) Ɛize - Setup the number of frames (P-frame) which contain only changed information based on basic
frame (I-frame). &ŽƌĂƌĞĂƐǁŝƚŚlots of movement,ƚŚĞďŝŐŐĞƌƚŚĞ'KWǀĂůƵĞŝƐonly the number of P-frames is bigger.As a
result, video resolution will be low but ‘Ĩile size’ and ďit-rate ǁŝůů decreased.
GOP(Group of Pictures) Ɛŝze iƐ
I-frame and P-frame can be created for ,Ϯϲϱ;,sͿH.264 and DW'ϰ video compression. I-frame(=key-frame) means
theǁŚŽůĞŝŵĂŐĞĚĂƚĂĨŽƌŽŶĞƐƉĞĐŝĮĐƐĐĞŶĞŽĨǀŝĚĞŽWͲĨƌĂŵĞŝƐŝŵĂŐĞĚĂƚĂǁŚŝĐŚŚĂƐďĞĞŶĐŚĂŶŐĞĚŝŶĨŽƌŵĂƚŝŽŶ
ĐŽŵƉĂƌĞĚto I-frame GOP is made up of one I-frame and corresponding several P-frames. To improve video quality, set the
number ofP-frames smaller and to decrease image size, set the number of P-frames bigger.
7 WƌŽĮůĞͲdŚĞƉƌŽĮůĞĚĞĮŶĞƐƚŚĞƐƵďƐĞƚŽĨďŝƚƐƚƌĞĂŵĨĞĂƚƵƌĞƐŝŶ,Ϯϲϱ;,sͿŽƌ,ϮϲϰƐƚƌĞĂŵŝŶĐůƵĚŝŶŐĐŽůŽƌƌĞƉƌŽĚƵĐƚŝŽŶĂŶĚ
additional video compression.
H.264: Main, High / H.265 (HEVC): Main
8 Smart ďitrate Đontrol
^ĞƚƵƉͲsŝĚĞŽĂŶĚĂƵĚŝŽƐĞƚƵƉ
Video Đonfiguration
Main -ŶŝŶƚĞƌŵĞĚŝĂƚĞƉƌŽĮůĞǁŝƚŚĂŵĞĚŝƵŵĐŽŵƉƌĞƐƐŝŽŶƌĂƚŝŽdŚĞŵĂŝŶƉƌŽĮůĞƐƵƉƉŽƌƚƐ/ͲĨƌĂŵĞƐWͲĨƌĂŵĞƐĂŶĚͲĨƌĂŵĞƐ
High -ĐŽŵƉůĞdžƉƌŽĮůĞǁŝƚŚĂŚŝŐŚĐŽŵƉƌĞƐƐŝŽŶƌĂƚŝŽdŚĞŚŝŐŚƉƌŽĮůĞƐƵƉƉŽƌƚƐ/ͲĨƌĂŵĞƐWͲĨƌĂŵĞƐĂŶĚͲĨƌĂŵĞƐ
KīͲ ^mart ďitrate Đontrol functionŝƐĚŝƐĂďůĞĚ
CVBR (Ĩramerate priority) - This Mode is for cameras which do not wantany frame drop, but still want to get Ălower
bitrate. then the ƚarget bitrate is set to be very low, ĞǀĞŶƚƐǁŝƚŚŚŝŐŚŵŽƚŝŽŶŵĂLJĂƉƉĞĂƌ very noisy.
CVBR (Ƌuality priority) - When the ƚĂrget bitrate is set to ďĞvery low,ĂŶĚĂŶĞǀĞŶƚǁŝƚŚŚŝŐŚŵŽƚŝŽŶŽĐĐƵƌƐLBR will
try to drop frames, ŵĂŬŝŶŐƚŚĞĮŶĂůĨƉƐůŽǁĞƌŵĂŬŝŶŐƚŚĞŽƵƚƉƵƚĨƌĂŵĞƐƚŽŚĂǀĞďĞƚƚĞƌƋƵĂůŝƚLJ
CBR - This ŵode is close to traditional security IPCAM, and itŝs not designed for LBR Itŝs provided as an option in LBR library to
help comparison.
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