8 Differences between VGA and HDMI
Difference between VGA and HDMI
Both VGA (Video Graphics Adapter) and HDMI (High Definition Multimedia Interface) are video standards that are used to connect a computer to an output device such as a monitor. The main difference between VGA and HDMI is the format in which the data is transmitted. VGA is an analog standard while HDMI is a digital standard.
Other differences between these interfaces are:
- VGA was created by IBM in 1987 while HDMI was introduced in 2002. Many computer manufacturers still include a VGA port. HDMI is capable of sending digital signals at very high speeds, resulting in near-perfect images.
- VGA is much older and uses analog technology for three sets of wires – red, green and blue – to determine what appears on the monitor. Analog signals are like a series of waves, while digital signals are essentially a series of zeros and ones.
- VGA only allows the transmission of video signals, therefore it can only accommodate a single video signal and nothing else, this means that any other signal would need another cable. HDMI was developed to carry audio and video in high definition devices. HDMI can carry one vid signal, up to 8 channels of digital audio, and one CCA channel.
- HDMI has the bandwidth to carry lossless, uncompressed audio formats such as DTS Master Audio and Dolby TrueHD that cannot be carried over VGA cables. While the improvements in audio might not be that important, especially if connecting a computer directly to a TV or monitor, it is important when feeding through a sound system, greatly reducing the amount of wiring in any setup like a home theater. House.
- When transmitting video through a VGA cable, the signal is converted from digital to analog so that it can be transported. Upon receiving the signal, it is converted back from analog to digital. Reason why there is some degradation when the video is being broadcast. With HDMI, the data travels digitally, therefore there is no digital-analog-digital conversion process, producing better image resolution and higher transmission speed.
- VGA is affected by the quality of the cable and the material of the connector, this can cause some distortion in the signal. HDMI is not affected by any of these factors.
- An HDMI cable longer than 50 feet is subject to signal degradation, which manifests itself when the screen displays digital “snow” or intermittent images. VGA cables that carry images a similar distance may have reduced color quality and increased image noise. In any case, it is important to use the shortest distance possible, and if necessary use repeaters to re-generate the signal.
VGA connectors use locking nuts to secure the cable to attached devices. HDMI uses a connection shell, but it can come loose if the cable is thick and oriented vertically at the back of a TV or computer monitor. VGA uses a 15-pin connector which requires more space on the back of a device. HDMI uses 19 wires for picture, sound, and data, but the connector is much smaller, so it takes up less space.