The deep Analysis VGA and DVI

VGA (Video Graphics Array) in 1987 with the IBM PS / 2 machines with the launch of a video transmission standard, when high resolution, display rate, rich colors, etc., in the field of color display has been widely used.
VGA connector on the video card output is an analog signal interface, also called D-Sub connector. VGA connector is a D-type interface, the above 15-pin space, divided into three rows, each row of five. VGA interface is configured on the low-end mainstream computer interfaces.
Through the analog VGA interface connected to the computer monitor works, the computer display internal digitally generated image information in the video digital / analog converter into R, G, B primary color signals and horizontal and vertical sync signals, the signal transmitted by cable to the display device. VGA cable theoretically support 2048x1536, 60Hz mode, of course, need your display device and graphics support.
The analog display device, such as an analog CRT display, the signal is sent directly to the appropriate processing circuitry, the drive control tube to generate an image. As for LCD and other digital display devices, display devices must be configured to the corresponding A / D (analog / digital) converter, the analog signal into a digital signal. After D / A conversion and A/D2 times later, inevitably result in some loss of image detail. VGA interface used in CRT monitors is understandable, but it is used to connect the liquid crystal display device of the class, the conversion process will display an image loss decreased slightly. CRT monitor because the design and manufacture of reasons, can only receive analog signal input, which is why we only see on a CRT display VGA connector causes.
DVI (Digital Visual Interface), the digital video interface. It was in 1999 by Silicon Image, Intel (Intel), Compaq (Compaq), IBM, HP (Hewlett-Packard), NEC, Fujitsu (Fujitsu) and other companies jointly composed DDWG (Digital Display Working Group, Digital Display Working Group) launched interface standard.
Definition DVI interface position HDMI Splitter.
A DVI display system consists of a transmitter and a receiver. Transmitter is the source of the signal can be built into the graphics chip, the chip can also be added in the form of graphics on the PCB; while the receiver is the display of a circuit, it can accept a digital signal, which is decoded and passed to the digital display circuit, through both, the video signal as an image on the monitor.
And compared to traditional VGA signal, using a liquid crystal display DVI signals phase problem does not exist, does not cause pixel jitter. In addition, the use of DVI signals, the display will not cause geometric distortion, greatly improving the quality of the picture.