|
◆ What's the difference between Hardware Compression and Software Compression?
|
|
Hardware Compression: Both Capturing Video Signal and Compressing Video Signal are done by DSP chipset integrated on DVR Board. It doesn't need the computer's CPU to do this work. It's low cost of CPU and RAM resources. In this system the computer CPU's task focus on answering network request, streaming the video/audio to network and saving recorded data to local hard disk.
Software Compression: The DVR Board only capture video signal but doesn't compress it, it is the computer CPU and RAM to do this compression work. It's high cost of CPU and RAM resources. In this system the computer CPU and RAM are often overloaded. It is easier to crash than hardware compression system.
|
| ◆ How do I choose the correct camera for my application? |
|
This in general is a comparatively difficult decision. Many aspects of the installation must be taken into consideration in order to obtain the correct performance that meets your requirements.
A high-resolution camera shuld be considered where greater detail of scene is required. E.g. Colour 460 TVL, Monochrome 570 TVL. Choosing a more sensitive camera will improve reproduction in poorly lit areas. The sensitivity of a camera is indicated by the minimum amount of light in order for the camera to produce a usable picture. e.g. Colour 1.0 Lux at F1.2.
A conventional camera produces a pale backdrop when an object is shot against a bright background. BLC (Back Light Compensation) will counter strong light sources retaining picture quality.
Concentrated light sources directed towards the camera (e.g. car head lamps) can be inverted by an optional peak white inverter or an eclipser function. This has the effect of bringing detail to areas and making an object clear, that would otherwise be shadowed.
|
| ◆ How do I set up a camera and lens for use in Low Light conditions and or with Infra Red Lighting? |
|
When setting the back focus of a Colour camera for low light conditions you should place an ND1 (Neutral Density) filter in front of the lens. When setting the back focus of a Mono camera for low light conditions you should place an ND3 (Neutral Density) filter in front of the lens. When setting the back focus of a Mono camera fitted with I/R lighting for low light conditions you should place an IRP (Infra- Red Pass) filter in front of the lens.
Should you not have any of the above filters you may have to attend site during the hours of darkness.
|
| ◆ I have installed a new camera and lens why am I unable to obtain a sharp image? |
| The most common resolve to this is to ensure that both camera and lens are the same mount i.e. "CS" mount lens on a "CS" mount camera and a "C" mount lens on a "CS" camera. |
| ◆ What are OSD cameras? |
| OSD (On Screen Display) cameras have a menu system within the camera assembly that can be accessed in order to set functions such as Iris levels, AGC on/off and most features of standard and advanced cameras. |
| ◆ Why do I have a clear sharp picture during the day and it is out of focus at night? |
| This is due to the depth of field changing as the light conditions change and can be easily overcome by following set procedures. |
Company Profile 
FAQ
