LT Security LTD2308 - Manual (Page 114)

Digital Video Recorder User Manual
108
Appendix B Calculate Recording Capacity
Users can calculate the size of hard disk according to the saving time and DVR recording settings. The DVR uses fixed video bit
rate. The below are the details at different settings.
Video
Format
Resolution
Frame Rate
Totally(FPS)
Video Quality Bit Rate (kbps) Used Space(MB/h)
PAL CIF 25
Highest 640 281
Higher 512 225
Medium 384 168.7
Lower 256 112.5
Lowest 128 56
NTSC CIF 15
Highest 314.9 141.7
Higher 251.5
112.5
Medium 188.3 84.7
Lower 125.4
56.4
Lowest 93.4 42
The calculation format is:
Total Recording capacity =Used space per hour (MB/h) (coverage rate of hard disk)
× recording time (hour) ×channel numbers
For instance, one customer uses NTSC cameras, set resolution to CIF, video quality to Lower, frame rate to 240 fps for