User Manual
BOP HD8 / BOP HD16
Ref.: IR1212828 A 21.08.2009
Edition 1.0
Page 52/87
I + M E A C T I A G m b H
6.4.4.3
C
OMPRESSION
/
Q
UALITY
The compression and therefore the picture quality follow the data rate. A smaller data rate
causes a higher compression.
3 = small data rate (0.3 MBit) / … / 60 = high data rate (6 MBit)
High data rate
Low compression, therefore better quality.
Following from the higher data volume, the recording time is lower.
Low data rate
High compression, therefore worse quality.
Following from the lower data volume the recording time is larger.
The value of (data rate) x (number of video channels) should not be greater then
150.
The data rate has an important influence to the total recording time.
See chapter 8.2.4 – calculation of the recording time
6.4.4.4
GOP
TIME
Time distance for a group of pictures existing from one full frame and additional
differential frames.
4 = shorter time interval to the next full frame / lesser differential frames
…
80 = longer time interval to the next full frame / more differential frames
More full frames
Higher quality but more data volume and therefore lower recording time.
Lesser full frames
Lower quality but lesser data volume and therefore longer recording time.
All the more full frames are recorded the performance of the BOP Reviewer
software is better.
6.4.4.5
A
DAPTIVE FRAME RATE
