Digital video recorders (DVRs) Comparison: American Dynamics, Geovision (4)
| Contact manufacturer | Contact | Contact | Contact | Contact |
| Channels |
4
|
4
|
4
|
16
|
| Monitor Outputs |
1
|
--
|
--
|
--
|
| Storage Capacity GB |
80
|
80
|
80
|
120
|
| Image per second (IPS) |
25 (PAL)/30 (NTSC)
|
16(PAL) / 20(NTSC)
|
25(PAL) / 30(NTSC)
|
400(PAL) / 480(NTSC)
|
| Compression Type |
M-JPEG
|
Wavelet, MPEG-4
|
Wavelet, MPEG-4
|
Wavelet, MPEG-4
|
| Resolution |
720 x 288
|
640 x 480
|
640 x 480
|
640 x 480
|
| External Storage |
CD-RW
|
--
|
--
|
--
|
| Audio Recording and Properties |
2 in
|
--
|
--
|
--
|
| Signal Mode |
--
|
PAL / NTSC
|
PAL / NTSC
|
PAL / NTSC
|
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