HDMI 1.4 is a version of the High-Definition Multimedia Interface that was released in 2009. It supports video resolutions up to 4K at 30 frames per second, making it suitable for high-quality displays. This version also introduced features like an Ethernet channel, allowing devices to share an internet connection through the HDMI cable. Additionally, HDMI 1.4 supports 3D video formats, enhancing the viewing experience for compatible devices. It also includes an Audio Return Channel (ARC), which simplifies audio connections between a TV and an audio receiver. Overall, HDMI 1.4 improved connectivity and functionality for home entertainment systems.