Should I Use a VGA Splitter or DVI Splitter for Video Signal Input and Output?
Technology enhancements in video signal transmission has ensured analogue and digital signals are transmitted using different devices, for example there are several types of video splitters on the market to select from for video duplication.
The decision must be canvassed thoroughly before buying a VGA or DVI video splitter. consequently let’s outline what VGA and DVI are, in addition as the timeline they were both released.
Video Graphics Adaptor (VGA) technology has been obtainable since 1987 thanks to IBM for development of this analogue video characterize technology that went onto become a standard used when referring to analogue video characterize standards.
VGA hardware and the software permit the data processed to become graphical data that can be displayed on a characterize monitor. The actual resolution for VGA is set at 640 x 480 pixels in characterize resolution for width and height respectively. However VGA characterize resolution has been enhanced with higher video resolutions such as SVGA, XGA and UXGA et al. In addition, the majority of manufacturers and resellers nevertheless refer to a VGA splitter as ‘VGA Splitter’, already though VGA has higher analogue video resolutions obtainable, such as mentioned early like SVGA, XGA and UXGA.
VGA can carry only analogue video signals consequently if you require audio in addition, a separate audio connection is required. There are numerous VGA splitters that have audio capabilities built-in to the VGA splitter, for example several Smart View devices have models obtainable with an audio stereo 3.5mm socket for each video connection.
Digital Visual Interface (DVI) is a newer technology that was released in 1999 by Digital Design Working Group. DVI superseded VGA, and as the name implies, DVI is uncompressed digital video data that is displayed on monitors and projector screens via DVI connectors. There are three main DVI connector types obtainable on the market each with a specific pin arrangement interface, for example DVI-I, DVI-D and DVI-A. additionally the three DVI connectors sustain certain video formats, for example:
• DVI-I is integrated video both analogue and digital signal sustain
• DVI-A is analogue video signal sustain
• DVI-D is digital video signal sustain
The meaningful characterize about DVI is its compatible with VGA. The two video interfaces work well with one another when an adaptor is utilised.
DVI has two methods obtainable to stream the video signal between devices, which is known as Single link and Dual link. DVI single link maximum resolution is up to 1920 x 1200 (WUXGA) @ 60 Hz, while DVI dual link can produce much higher resolution, but depends on several factors, such as cable copper bandwidth limitations, DVI source limitations, and DVI sync limitations. Additionally DVI supports hot plugging meaning it can be connected and disconnected without powering down the system. However VGA isn’t appropriate for hot plugging hence requires the system be shut down first before connection of VGA cables.
In the early days of DVI it was envisaged that DVI would become the recognised standard for digital format. However, DVI was mainly used with computer characterize monitors and not so much with household TV scenarios.
DVI can stream digital video very well however it can’t move audio signals. To permit audio on a DVI splitter you’ll require digital audio capability built-in to the devices with separate audio connections. Furthermore, the release of High-Definition Multimedia Interface (HDMI) technology that can transmit uncompressed digital video and digital audio signals together has ensured HDMI quickly became the popular choice for digital video output to characterize panels.
The new computer desktops don’t have VGA connections obtainable on most systems. Usually there are DVI or DisplayPort connections instead. The DisplayPort digital interface superseded DVI in 2006 however you nevertheless see DVI utilised. sometimes Information Communication Technology (ICT) hardware staff may be required to mix-and-match connections with adapters, for example, if a machine has a VGA socket but the characterize monitor has a DVI connector, an adapter can be utilised since DVI is backward compatible. observe: the signal will nevertheless be VGA quality that is transmitted unless a dedicated electrical VGA to DVI converter is used.
When selecting a DVI or VGA splitter ensure you check the specifications for the product, for example resolution supported, frequency rate, the characterize video kind supported, connection types for interface input/output, strength adaptor required, switching off/on roles, built-in amplifier booster and whether incorporated with audio socket or not.
The most shared video splitter is the kind ‘one input video source to two outputs video’ destination. However there are numerous configurations to select from for video input and output setups. Another kind of splitter is called a ‘video matrix’ that can have two or more video inputs and two or more video outputs. This can be handy for multiple supplies that can be switched on/off to unprotected to the desired video output characterize. Each video splitter will suit a particular scenario for video presentation so choose wisely. In addition, several brand video splitters can be cascaded, such as Smart View.
To continue the integrity of the video signal high quality VGA cables with ferrite filters should be interconnected with the devices. If the installer decides to skimp on the cost of VGA cables for the installation signal degradation can rule to problems such as ghosting and pixelation.
There are DVI splitters and DVI boosters with High-bandwidth Digital Content Protection (HDCP) incorporated into the devices. Authorised digital video content is only allowed to be transmitted and received between HDCP devices while VGA analogue signals aren’t restricted with this security protocol. Some users have reported interconnection issues when using HDCP enabled devices, such as handshaking connection problems and continuity in live video streaming.
If you have the newest high-definition characterize monitors you should consider HDMI splitters in addition. VGA can be problematic when outputting video signals to large panel screens like Plasma TV, LED widescreen TV and OLED TVs. Especially video quality degradation issues and pixelation problems may occur when VGA is the source to high-definition products.
VGA splitters have generally been more popular with computer characterize monitors over the years than DVI. The cost for a VGA splitter is usually less than its equivalent DVI product. Furthermore with the popularity of the superior HDMI technology integrated into high-definition TVs and notebooks has ensured DVI splitters are less shared. With most people selecting a HDMI splitter for their digital video and audio solutions over the less-features of DVI.
Finally, you should consider several pivotal factors for your decision, such as the quality of the video resolution broadcasted you require, and whether it’s digital, or analogue equipment utilised in your setup. Furthermore check the product specifications before buy, and consider if you require audio in addition for the video broadcast? additionally if you implement a VGA splitter or DVI splitter choose one with a booster built-in to the device. The costs should be secondary to ensure you’re satisfied with your ultimate decision.