Video port which is also known as Graphic or display port. It is normally used as an output of the computer, laptop, or television equipment. With the increase of advanced technology, many versions of video ports have been launched according to the needs. There are many different types of Video adapter ports.
VGA Port (Video Graphic Array)
VGA Display port which stands for video graphics array. This is an old type of port and was launched around 1987. The VGA port has 15 pin D type connectors which are distributed in three rows. It only carries only analog data and so the quality of the video may degrade at higher resolutions. The longer cable length may cause data loss and blur display. The end adapter normally has a blue color and two screws are attached to the VGA port for fixing tightly in the device. The VGA port was used mainly CRT monitors. But you can still find VGA ports on some new equipment such as new LCD monitors, projectors slowly being phased out in favor of more modern designs
DVI Port (Digital Visual Interface)
DVI which stands for digital visual interface the DVI port has succeeded VGA port. It was developed in 1999 and it was designed to provide uncompressed high-quality video to LCD monitors. Three types of DVI ports are available depending upon their functionality. First is DVI-A where the A means analog which can only carry analog signals. The second one is DVI-D in which D means digital signal and is used to carry only digital signals. The last one is DVI-I in which I mean integrated and DVI-I carries both analog as well as digital signals. In DVI ports there are two different types of standards one is the single link and the other one is dual link
Depending upon the functions DVI ports can be bifurcated in the following three categories
DVI-A – This type of port only carries analog signals it has (12+5) 17 pins. The dual-link option is not available in the DVI-A type port.DVI-A cables are not widely used due to their limitations.
DVI-D – This type of port carries only video signals in the digital form. The DVI-D connectors have 8 pins in 3 rows and have a slot used to ground in dual-link type (total-24+1 pins). DVI-D single-link has 18 pins in has a ground pin (total- 18+1). The DVI-D cables are compatible with both DVI-D and DVI-I connectors.
DVI-I – This type of ports and cables can do the transmission of both digital as well as analog signals. The DVI-I port single link has 23 (total 18+5 pins).DVI-I dual link has 29 pins. DVI-I connectors are the most widely used ports in nowadays monitors.
HDMI stands for a high-definition Multimedia Interface. The HDMI has a broad range of use in electronic products such as TVs monitors laptops mobile devices.
It is, in fact, the most used video port today. HDMI was developed in 2002 and it was designed for transmitting video and audio digital data through a single cable HDMI. It is one of the best standards for high-definition in consumer electronics delivering crystal-clear video as well as audio. In 2009 HDMI 1.4 was released and it added another channel to HDMI for data that has the capability of network communication. So the connected devices that use this feature will give HDMI the ability to send and receive data at 100 megabits per second Ethernet. HDMI cable carries not only audio and video signals in single cable but also has the ability of Ethernet networking, but also with HDMI 1.4 it also added support for 4k video at 30Hertz and in 2017.
HDMI 2.0 was released which added support for a higher resolution and refresh rates with support for 4k video at 120 Hertz and 8kvideo at 60 Hertz. It can also support a max resolution of 10k commercial audio-visual systems and specialty usages. Due to these abilities, HDMI 2.0 specification is now most widely used in all electronic equipment, the main change between the HDMI 1.4 and HDMI 2.0 version is bandwidth. HDMI 1.4 has a maximum bandwidth of 10.2 Gbps and the HDMI 2.0 has at about 18 Gbps. When 4K high definition technology was launched bandwidth of HDMI 1.4 was facing a limitation only 24 frames per second was possible at 4K resolution (3,840 x 2,160). But HDMI 2.0 has solved this problem and up to 60 frames per second were possible at 4K resolution.
Display Port was launched in 2006 and it was developed by Visa which means the video electronics standards Association. The Display Port was primarily designed to be used for video but it can carry audio signal as well as USB data. Display port has a high-performance interface so it has replaced older ports such as VGA, DVI interfaces.
It can also connect VGA DVI or HDMI ports with the use of the converter. One of the main advantages that it has over HDMI is that it has multi-monitor connection capabilities. The Display Port allows you to connect multiple monitors. It is more focused on computer use of other equipment such as televisions. Another advantage that Display Port has over HDMI is that it has a locking mechanism that keeps the cable locked in place whereas HDMI does not have a locking mechanism and also unlike HDMI display port is a royalty-free product.
Thunderbolt is a high-speed technology interface that outputs one serial signal from a combination of PCI Express and the Display Port. This port is not just for connecting video but it’s also used for attaching other external peripherals as well. It can connect up to six devices. Thunderbolt was released in 2011 and was mainly used in Apple products but it has become available all PCs. Now there are three different versions of Thunderbolt 1 which was launched in 2011. Thunderbolt 2 uses the same connector as a mini Display Port and Thunderbolt 3 it is a hardware interface that has USB-C connectors. As compared to Thunderbolt 2, it has twice the bandwidth up to 40 Gbps and has USB 3.1 with 10 Gbps, one 4-lane PCI-express 3.0, and 8-lane Display Port.