EverFocus ECOR264-4X1 - Manual (Page 51)

43
Covert: Check the box to hide the camera picture in live and sequence modes. However, the image will still
be recorded and can be played back by any user who has playback rights.
Record Mode: 2 record modes are available.
Normal + Event: This recording mode includes continuous and event recording.
Event Only: Video will be recorded only when events occur.
Resolution: Select recording resolution based on video format.
NTSC: 704x480 / 704x240 / 352x240
PAL: 704x576 / 704x288 / 352x288
Record Quality: Select an image quality for recording. There are five different qualities available: Superior,
High, Standard, Basic and Low. A higher image quality uses more HDD space.
Normal Speed: Frame rate in frames (images) per second (FPS) for continuous recording. The speed is
limited by the maximum total recording capacity of the DVR as allocated across all the installed cameras,
with an upper limit of 30 FPS (NTSC – 25 PAL) per individual camera (real time recording). The DVR is
capable of recording 480 CIF (352x240) sized frames per second (NTSC; 400 PAL); each 704x240 image
(2 CIF) per second requires allocation of two of those CIF frames from the overall capacity of 480 CIF
frames, and each 704x480 image (D1 or 4 CIF) per second requires allocation of four of the CIF frames
from the overall capacity. Thus the DVR can record a combination of CIF, 2 CIF and 4 CIF images, with
different combinations of image size/resolution and different FPS rates on different cameras, so long as the
total CIF equivalents allocated is not greater than 480 CIF per second. Choices for possible record speeds
are 30, 15, 10, 7.5, 5, 3, 2 and 1 FPS.
Examples:
16 cameras at CIF resolution at 30 FPS: 16x30=480 FPS
2 cameras/4CIF/30FPS plus 5 cameras/2CIF/15FPS plus 9 cameras/CIF/10FPS:
2x4x30+5x2x15+9x1x10= 240+150+90 = 480
2 cameras/4CIF/30FPS plus 2 cameras/2CIF/30FPS plus 12 cameras/CIF/10FPS:
2x4x30+2x2x30+12x1x10= 240+120+120 = 480
In these examples, the recording capacity of the DVR is fully allocated to normal recording, with no reserve
capacity for increasing image size and/or FPS rate in response to a motion or alarm event (see next item).
Since EverFocus DVRs have the capability to change recorded image size and FPS rate in response to
events, it may be advisable to reserve some recording capacity for event response. For example:
2 cameras/4CIF/10FPS plus 5 cameras/2CIF/10FPS plus 9 cameras/CIF/5FPS:
2x4x10+5x2x10+9x1x5= 80+100+45 = 225 allocated with 255 in reserve