|
Frames per Second |
80 GB |
120 GB |
240 GB |
360 GB |
480 GB |
960 GB |
|
30 fps |
320 hrs |
480 hrs |
960 hrs |
1440 hrs |
1920 hrs |
3840 hrs |
|
120 fps |
80 hrs |
120 hrs |
240 hrs |
360 hrs |
480 hrs |
960 hrs |
|
240 fps |
40 hrs |
60 hrs |
120 hrs |
180 hrs |
240 hrs |
480 hrs |
|
480 fps |
20 hrs |
30 hrs |
60 hrs |
90 hrs |
120 hrs |
240 hrs |
|
Estimated hours of recorded
video at 320 x 240 resolution utilizing the WAVELET Compression option |
Can a DVR record upon detecting motion or via a
schedule?
Yes. Each camera can be configured independently to record upon video motion
detection or via a schedule.
What type of connectors are used to connect DVRs to
security cameras?
All of our surveillance DVRs have female BNC connectors for camera inputs. Our
security cameras have a female BNC connection. Our Video & Power cables have two
male BNC ends which connect cameras to a DVR.
What is MPEG4 video encoding?
The Motion Picture Experts Group (MPEG) released MPEG-4 encoding in 1998. The
basic idea behind MPEG is that compressed images are compared before being
transmitted over the network. The first compressed image is used as a reference
and compared to the images that follow it in the video sequence. The first image
is transmitted over the network along with the parts of the following images
that differ from the initial reference image. The viewing application on the
receiving end of the transmission then reconstructs all images based on this
information and displays the result. This is a simplified description of how
MPEG-4 works.
What is MJPEG video encoding?
Motion JPEG (MJPEG) is a video encoding where each frame of video is captured
and compressed into a separate JPEG image. The resulting quality of video
compression is independent from the motion in the image.
What is MJPEG2000 video encoding?
MJPEG2000 or MJ2K is an adaptation of the JPEG2000 standard used for still
photos. MJPEG2000 treats a video stream as a series of still photos, compressing
each individually, and with no interframe compression. Because no interframe
compression is used, it is ideal for editing. The JPEG2000 standard is the
offical successor to JPEG and will eventually replace the older JPEG standard
for high-quality image compression.
What are the advantages/disadvantages of MPEG4 video
encoding versus MJPEG video encoding?
The video sequencing compression that is used my MPEG4 allows it to use less
network bandwidth and storage that MJPEG. MPEG4 videos generally have a slightly
lower image quality when compared directly to an MJPEG video. This is not very
noticable when viewing but is more important if video images need to be editted,
which is normally not applicable in surveillance video. MJPEG and MJPEG2000
capture a stream of individual JPEG images while MPEG4 captures changes to
images to create video.
What does NTSC mean?
NTSC is an abbreviation for the National Television Standards Committee. The
term "NTSC video" refers to the video standard defined by the committee, which
has a specifically limited color gamut, is interlaced, and is approximately 720
x 480 pixels, and 30 frames per second (fps). This standard is used in North
America.
What does PAL mean?
PAL is an abbreviation for Phase Alternating Line. This is the television
display standard that is used mainly in Europe, China, Malaysia, Australia, New
Zealand, the Middle East, parts of Africa, and other parts of the world. PAL
uses 625 lines per frame and a frame rate of 25 frames per second.
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