HDMI stands for high-definition multimedia interface and is the most common standard for transferring high quality uncompressed digital video and data. All modern video projectors, computers and monitors are compatible with this transfer type. An HDMI cables can differ in speed what makes them to achieve higher resolutions.
The resolution of 4K is up to 4 times as high as 1080p. This resolution consists of a horizontal resolution of 4000 pixels and a vertical resolution of 2000 pixels.