DVR FAQ
What is DDNS: (Dynamic DNS) is a service that maps Internet domain names to IP addresses. For instance: translates host names like www.yourname.com into computer-understandable IP addresses like http://123.45.67.89 and back again. DDNS is also designed to support dynamic IP addresses, such as those assigned by your internet provider. This makes DDNS a good fit for home networks which usually receive dynamic public IP addresses.
To use DDNS simply sign up with a DDNS provider and install network software to monitor your IP address. The DDNS provider will than provide an easy-to-remember URL for quick remote access to your network including security cameras. We recommend www.dyndns.com which provides a free dynamic DDNS service via software that can run on your computer. Learn more about how Dynamic DNS works here: DYNDNS
What is S.M.A.R.T. Technology? S.M.A.R.T. (Self-Monitoring, Analysis and
Reporting Technology) is a technology built into most modern hard
disks. If enabled, it lets the end user query the hard drive about it's
health and performance and can predict the future failure of hard disk drives.
What is Video Compression?
- H.264: the
newest generation of audio & video compression format which allows
transmission of higher quality video at a lower bit rate using the same bandwidth. It provides the latest in advanced video encoding and decoding
technologies delivering smaller file sizes, higher performance, solid reliability and
longer recording times over previous standards. H.264 file compression reduces the file size and therefore requires less space on a hard drive or server than MPEG4. Higher image quality vs MPEG4
- MPEG4:
was introduced in 1998 as the next generation of file compression for
delivering audio & video over a wide range of bandwidths. It
achieves this by compressing data to form small bits that can be
transmitted and than decompressed for viewing. It stores and transmits
only the changes from one frame to the next, instead of each frame
however the amount of data that is removed is not noticed by the human
eye.
IP FAQ
What is an IP Camera? An IP Camera (also known as Network
Camera) is a stand-alone device that allows the user to capture, view
and send live video footage over any IP network or the Internet using a
standard web-browser. In some cases, cell phones and other handheld
devices can view these live images in real-time.
What is PoE? Power over Ethernet. Power
over Ethernet (or PoE) is a technology that allows LAN-enabled devices,
such as network cameras to be powered using standard Ethernet cabling. Each individual
IP Camera transmits its images and receives power through a single Ethernet cable. This eliminates the need for complicated and expensive cabling and can often operate along with an existing wired network. PoE also offers greater flexibility for installation since cameras can be placed in areas where power outlets are not readily available. Another benefit of PoE technology is it
enables easy installation of UPS (uninterruptible power supplies) for
video surveillance applications requiring 24-hour surveillance that
will continue operating even during power outages.
GLOSSARY
4CIF: Four-times Common intermediate Format, a format of color images, 704x480 pixels (NTSC)
2CIF:
Two-times Common Intermediate Format, a format of color images, 704x240 pixels (NTSC)
DCIF: Double times Common Intermediate Format, a format of color images, 528x320 pixels (NTSC)
CIF:
Common Intermedieate Format, a format of color images, 352x240 pixels (NTSC)
QCIF: Quarter Common Intermediate Format, a format of color images, 176x120 pixels (NTSC)
DHCP: Dynamic host configuration protocol, for the dynamic assignment of configuration information
DNS: Domain name system, for translating computer host names to IP addresses in a user-friendly way
H.264: the
newest generation of audio & video compression format which allows
transmission of higher quality video at a lower bit rate using the same bandwidth.
MPEG4:
was introduced in 1998 as the next generation of file compression for
delivering audio & video over a wide range of bandwidths. It
achieves this by compressing data to form small bits that can be
transmitted and than decompressed for viewing. It stores and transmits
only the changes from one frame to the next, instead of each frame
however the amount of data that is removed is not noticed by the human
eye. FPS (FPS): Frames Per Second: is a measure of how motion video is displayed.
The term applies equally to film video and digital video. Each frame is a
still image.
NFS:
Network File System
NTSC: National Television System Committee, a television encoding system
OSD: On Screen Display
PAL: Phase Alternating Line, a television encoding system PoE: Power over Ethernet
PPP: Point-to-point protocol
PPPoE: PPP on Ethernet
RCA: A type of video and audio interface
RS-232:
A 25 pin Interface Standard developed by EIA, also named EIA-232
RS-485:
A 25 pin Interface Standard developed by EIA, also named EIA-485
RTP: Real-time Transport protocol
SDK: Software Development Kit
TCP: Transmission control protocol
UTP: Unshielded twisted pair cable, generally refers to Ethernet Interface
VGA: Stands for a kind of resolution: 640x480 pixels. Supported display resolutions: 800x600/60Hz, 800x600/75Hz, 1024x768/60Hz
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