VGA to HDMI Convertersby Darrin Meyer
VGA is a type of connection used with computers to send the video signal to a monitor, which can also be a TV screen. Many TVs do not feature VGA inputs, however, creating the need for VGA to HDMI adapters and converters to bridge the gap and make the two devices compatible.
The main difference between VGA (video graphics array) and HDMI (high definition multimedia interface) is that VGA is an analog means of transmission while HDMI is digital. Therefore, some form of converter is needed to change and re-encode the signal between its output (PC) and input (HDTV) device. The converter must also scale the video to a resolution accepted by the TV (i.e. 720p or 1080p).
The standard VGA to HDMI converter is a simple box featuring a VGA input and an HDMI output, with some offering other output connection types, such as component video, as well, though HDMI provides the higest video resolution to a TV. The converters also often provide a 3.5mm audio input to accompany the VGA video input, as HDMI can handle both video and audio within the single cable.
Though there are direct HDMI-to-VGA adapter cables on the market, these cables only function in that direction, mainly for sending an HDMI-output signal to a computer monitor, and cannot convert video both ways. This can be misleading to some, as the other primary type of PC video output--DVI (digital visual interface)--can be converted directly to HDMI with only the cable, as DVI is also a digital format.
- photo_camera vga image by MATTHIEU FABISIAK from Fotolia.com