The Gefen EXT-DVIAUD-2-HDMI is a specialized format converter designed to bridge the gap between source devices with DVI output and displays or receivers that require an HDMI input, with the critical addition of embedding analog audio into the digital signal path. It addresses a common limitation of the DVI interface, which transmits only video, by accepting separate stereo analog audio inputs and combining them with the digital video stream to create a fully compliant HDMI output. This enables complete audio/video functionality from computers, older media players, or professional equipment that lack native HDMI outputs, allowing them to connect seamlessly to modern televisors, projectors, and AV receivers that expect both audio and video on a single HDMI cable.

The device operates as an active converter, requiring external power to drive its internal processing circuitry. It extracts the TMDS (Transition Minimized Differential Signaling) digital video data from the DVI input and multiplexes it with the digitized analog audio, generating a new HDMI data stream that includes both synchronized A/V components and necessary control signals like HDCP. This process supports high-definition video resolutions up to 1920x1200 (WUXGA), ensuring compatibility with Full HD 1080p displays. The converter also handles essential communication protocols such as EDID handshaking between the display and the source, ensuring optimal resolution negotiation and stable operation.

Housed in a compact, sturdy enclosure, this converter is an essential tool for system integrators, home theater enthusiasts, and business users seeking to modernize their AV setups without replacing functional DVI-based source equipment. Its plug-and-play design requires no software configuration, offering a straightforward and reliable solution for upgrading connectivity. By effectively creating a fully-featured HDMI port from legacy DVI and audio outputs, the device extends the useful life of valuable hardware and simplifies system design, eliminating the need for separate audio cabling to the display and ensuring a clean, integrated user experience.