Technical FAQ

1. How to select Standalone DVR based on it's Video Compresson Method?
Answer: For most applications, video and image compression are essential in order to conserve network bandwidth. Over time, a number of different standards have evolved, and even more are on the horizon. Here are couple of useful article we have found on the internet, comparison tables are provided to help you choose the right surveillance product.
[pdf]White Paper - Using MPEG4 Technology in Network Video Surveillance Systems
[pdf]White Paper - Digital Video Compression
[pdf]Video Compression Standards Journal

2. What is the benifit of using Wide Dynamic Range Security Camera?
Answer: [pdf] Item# 108290 - 128x Wide Dynamic Range Security Camera Presentation

3. Resolution Confusion: Will the real HDTV please stand up? (added Nov13, 2005)
Answer: Resolution is expressed in numbers that refer to the number of pixels in a line of a television picture, such as 1280x720, 1024x1080 and 1366x768 (pixel x number of lines). These three numbers are all HDTV resolutions. A resolution of 852x480 is not high-definition; that qualifies as enhanced-definition television (EDTV).
Until recently, the two main HDTV resolutions were 1080i or 720p (768p is essentially the same thing but, because of the demands of fixed pixle displays, 768p is more practical to manufacture than 720p). Hitachi and Fujisu build plasmas in 1024 resolutions, which are designed to display the viewable portion of a 1080i pciture without vertical scaling. The Sharp TV featured here and many other TVs coming out later this year will feature 1080p, which some manufactures claim is a pinnacle of HDTV resolution. It's true that 1080p puts more pixels on the screen than any other resolution, but there is currently no picture content to support that resoluton. The quality of a TV's picture relies on a lot more than just its pixel count: contrast, brightness, color unformity, scaling and video processing are qually important. Don't rate a TV by numbers alone.