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APPENDIX C: Recording times Average recording times, based on 100GB harddisk capacity.
Using the VBR (Variable Bit Rate) method, the storage requirement per image depends
on the image’s colour and contrast content and captured motion.
The following calculations represent sample values for continuous recording. Actually
achieved values may differ and can be calculated by means of test recordings if required.
The value IMAGES/S refers to the total DVR recording rate (all installed cameras).
CALCULATION BASE: 100 GB harddisk capacity
Resolution: 720 x 288 (Half-D1)
RECORDING IMAGE SIZE (KB)
RATE LOWER LOW BASIC STANDARD HIGH SUPERIOR
Images / s 3,5 3,9 4,2 4,9 5,6 6,4
RECORDING TIME (HOURS)
50 159 142 132 113 99 87
25 317 285 265 227 198 174
8 992 890 827 709 620 543
4 1984 1781 1653 1417 1240 1085
1 7937 7123 6614 5669 4960 4340
Resolution: 720 x 576 (D1)
RECORDING IMAGE SIZE (KB)
RATE LOWER LOW BASIC STANDARD HIGH SUPERIOR
Images / s 7 8 8,5 10 11,2 12,5
RECORDING TIME (HOURS)
25 159 139 131 111 99 89
8 496 434 408 347 310 278
4 992 868 817 694 620 556
1 3968 3472 3268 2778 2480 2222
Resolution: 360 x 288 (CIF)
RECORDING IMAGE SIZE (KB)
RATE LOWER LOW BASIC STANDARD HIGH SUPERIOR
Images / s 2 2,3 3 3,8 4,3 4,6
RECORDING TIME (HOURS)
100 139 121 93 73 65 60
50 278 242 185 146 129 121
25 556 483 370 292 258 242
8 1736 1510 1157 914 807 755