DVI line can transmit audio? Support 3D?

Although the DVI and HDMI lines originate from the same source, but the DVI line is not able to transmit audio signals, in the use of the required additional audio cable to transmit audio. At present, the most commonly used DVI line is a type of DVI24+1 interface, the transmission support only a digital video signal, does not support audio transmission. It has also become one of the reasons the DVI interface gradually eliminated.

There are types of DVI line can be compatible VGA analog signal, the line interface for DVI-I, mainly in DVI24+5 and DVI18+5. DVI-D interface and pure digital (DVI18+1 and DVI24+1) compared with DVI-I interface, 4 more root pin, the four root pin for VGA compatible RGB analog signal transmission. Adapter lot of DVI VGA using the DVI24+5 type.

The DVI interface is divided into two channels (dual link) DVI -- type DVI24+N and single channel (single link) DVI18+N type, only the double channel DVI interface can support 3D video signal. The basic realization of 3D video refresh frequency is 120Hz, only the dual channel DVI interface can achieve the refresh frequency of 120Hz and 60Hz can be achieved under the 2560x1600, the single channel only to 60Hz.