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24.3 What is the recording capacity of the VDR?
Under IEC 61996-
1 each of the recording mediums have the following recording requirements…
Storage Area
Hours
Long Term Recording Medium (LTRM)
720
Fixed Recording Medium (FRM)
48
Float Free Recording Medium (FFRM)
48
Recordings include NMEA, Audio and Video data sources along with additional support files
–
config, log files etc. Each one is stored in a separately time stamped data file on all media. Older
files are removed to make space for newer files.
The storage space is always around 95% full as the system needs the additional 5% for
managing files.
For a system with the following configuration the amount of historic data that can be recorded is
estimated as follows:
Sources
Storage Time (h)
NMEA
Audio
Video
LTRM
FRM
FFRM
20x NMEA
4 x DIM
4 x AIM
6 x Mics
2 x VHF
4 x VGA
2228
130
130
4 x VGA
+
4 x LWE 450*
1729
101
101
8 x LWE 450*
2014
117
117
8 x LWE 450**
785
46
46
Note:
1.
Audio and Video sources consume considerably more storage resources than
NMEA.
2.
Video recordings are typically stored every 15s from a source. Storage time is
dependent on compression and picture format used by the source.
The indicated number of hours in the previous table are indicative of measurements
with image resolution as follows:
a)
VGA
– 1696 x 1250
b)
LWE 450*
– 1920 x 1080
3.
Video recordings with higher resolutions require additional storage space and could
compromise the minimum storage requirements.
For example: LWE 450** 3840 x 1080 with 90% compression indicated above.
Although this satisfies the LTRM requirement it will
not satisfy
the FRM and FFRM
requirement and will not be compliant with IEC 61996.
The amount of time that has been stored, for each area compared to IEC61996 requirements,
is available on the BCU status page.
Summary of Contents for NW6000
Page 1: ......
Page 91: ...Page 91 191...
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Page 120: ...Page 120 191 Figure 17 4 2 Connection figure Digital Module 16 channels...
Page 121: ...Page 121 191 Figure 17 4 3 Connection figure Digital Module 24 channels...
Page 125: ...Page 125 191 Figure 18 4 2 Connection figure Analogue Module 8 channels...
Page 126: ...Page 126 191 Figure 18 4 3 Connection figure Analogue Module 12 channels...
Page 184: ...Page 184 191 Figure 5 8 1 Sample dataset playback...