FAQ - Digital Video Recorder
Q. What is the most important factor that affects the recorded video resolution ?
The DVR quality is very important for the recording resolution, while the camera resolution has less influence on the recording resolution. Full D1 real time is the top quality of DVR.
Q. What kind of network connections can I use with the DVR System?
Our DVR's works with ANY Windows tcp/ip network connection, including Ethernet, ISDN, DSL, T1, Frame Relay, ATM, or even a dial up phone line (modem)!
Q. What is MPEG-4?
MPEG-4 is the standard, global multimedia standard, delivering professional-quality audio and video streams over a wide range of bandwidths, from cell phone to broadband and beyond.
MPEG-4 was defined by the Moving Picture Experts Group (MPEG), the working group within the International Organization for Standardization (ISO) that specified the widely adopted, Emmy Award-winning standards known as MPEG-1 and MPEG-2. Hundreds of researchers around the world contributed to MPEG-4, which was finalized in 1998 and became an international standard in 2000.
Q. What is H.264?
H.264 is a next-generation video codec standard which can achieve high quality video in relatively low bitrates. You can think it as the “successor” of the existing formats (MPEG2, MPEG4, DivX, XviD, etc.) as it aims in offering similar video quality in half the size of the formats mentioned before. Also known asAVC (Advanced Video Coding, MPEG-4 Part 10), H.264 is actually defined in an identical pair of standards maintained by different organizations, together known as the Joint Video Team (JVT). While MPEG-4 Part 10 is an ISO/IEC standard, it was developed in cooperation with the ITU, an organization heavily involved in broadcast television standards. Since the ITU designation for the standard is H.264, you may see MPEG-4 Part 10 video referred to as either AVC or H.264. Both are valid, and refer to the same standard.
Q. What is an AVI file?
AVI stands for Audio Video Interleave. It is a special case of the RIFF (Resource Interchange File Format). AVI is defined by Microsoft. AVI is the most common format for audio/video data on the PC. Its an example of a de facto (by fact) standard.
Q. What is the D1 resolution ?
The D1 resolution is 720 x 480, and is the maximum resolution for the analog CCTV system.
Q. What is the CIF resolution ?
The CIF resolution is 320 x 240
Q. What is a Digital Watermark?
A visible or invisible watermark that is applied to a digital image such that ownership of the image is known.
Q. What happens to the DVR System when the hard drive gets full?
When you run the DVR System you are given a choice. The software can be set up to either stop recording when the hard drives get full, or start recording over the oldest data (FIFO) when it runs out of hard drive space.
Q. How much hard drive space is required for video recording?
The DVR System video recording systems features adjustable quality settings that let you increase or decrease video picture quality. If you decrease picture quality, you will need less hard drive. If you increase picture quality, you will need more hard drive. In round numbers, if you want to obtain excellent video recorded images (much better than a VCR tape can provide) you should have about 350MB of free hard disk drive space for every hour of record time that you require. In other words you will need about 9GB of hard drive space for every 24 hours of recording time. If you need 7 days (168 hours) of recording time, you need about 56GB of hard drive. Of course, if you enable the built in video motion detection that comes with the DVR software, and only record when there is movement in front of the cameras, you will be able to record for MUCH longer periods of time.
Q. I want to record video for a really long time. Can I use Digital Video Recording (DVR) System to write video to more than one hard drive?
YES! DVR System can write video to as many hard drives as you want, up to 12 drive letters in total! You can write to local drives, SCSI drives, RAID, and even mapped network drives! The DVR software will record video onto each hard drive, until the last one gets full, and then start over again automatically.
Q. I understand that I can use DVR System to view video from my desktop. Can anybody else view video from their desktop while I am playing back video, or do they have to wait until I finish before they can play video?
Any number of viewers can simultaneously view video from any DVR video server.
Q. Is DVR System easy to set up & use?
YES! We have invested a great deal of effort in making DVR System very powerful, yet easy to use.