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DVI Digital Visual Interface

La Digital Visual Interface รจ una porta, ovvero un apparato hardware in grado di trasmettere del segnale video. Si trova spesso su computer, televisori e videoproiettori che richiedono video ad alta definizione. Attraverso di essa il segnale video viene inviato al monitor in forma digitale, quindi meno soggetta ai disturbi.

La DVI viene implementata ormai in molte schede video di ultima generazione, e porta a un notevole miglioramento rispetto alle precedenti interfacce analogiche. Le immagini prodotte dalle interfacce DVI sono molto nitide, ad alta risoluzione e predisposte per l’HDTV.

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Pinout del connettore DVI

Digital Visual Interface [DVI] .. standard for high-speed, high-resolution digital displays. Developed by the Digital Display Working Group (DDWG).

Refer to the DVI page for additional info and connector pinout, signal names and a description {This web site}

Digital Video Broadcasting/Digital Audio-Visual Council (DVB/DAVIC), developed by DAVIC [inactive] and DVB and adopted by European Telecommunication Standards Institute (ETSI) and International Telecommunication Union (ITU)

DVI has a number of different types connectors:
DVI-D Digital only connector; 24 pins [modified D style]
DVI-I Digital and Analog [RGB]; 29 pins [modified D style]
DFP Digital only connector

Component Video

Component Video is also called YPbPr, or YCbCr and transmits the picture information in a luminance and phase-opposite chrominance pair over three coax cables [Red, Green, and Blue]. RGB [Red, Green, Blue] is some times also called Component Video, but combine the color, black and white signal

YPbPr is ‘sometimes’ used when discussing the three-wire analog video component interface EIA-770 [EIA-770.2-a SMPTE-240M and others]. The luminance (Y) is represented separately from the color components (Pb and Pr).
In some cases The Y output is provided as a Green jack, the Pb is provided as a Blue jack, and the Pr is provided as a Red jack. The ‘Y’ signal carries the black and white information, The ‘Pb’ and ‘Pr’ signals carry the color difference signals.

YCbCr is used when discussing a digital component interface ITU-601 or ITU-656 digital interfaces (formerly CCIR-601, CCIR-656). Y is Luminance, Cb is Blue Chromanance, and Cr is Red Chromanance. CCIR-601 defines an 8-bit DIGITAL 2’s compliment coding for component video

RGB is the component format in which the primary colors (red, green, and blue) are transmitted as three independent components. The color, black and white signals are combined within these three signals. Only using RGB inputs requires separate horizontal and vertical sync inputs. RGB presents a better [TV] signal than the other forms of Component video, S-Video, Composite Video, or RS-170. RGB sends each signal on a separate cable and does not mix the color signals.

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