Mini-HDMI C Cable (Type C) connectors are compatible with HDMI 1.4 specification. The Mini-HDMI connector is much smaller than a standard Type A plug. It measures 10.42 mm x 2.42 mm. It still has the same 19-pin configuration of the HDMI Type A, but much smaller.
Micro-HDMI (HDMI type D) is a miniaturized version of the High Definition Multimedia Interface specification. The format was designed to combine audio and video into a single digital interface small enough to connect to smartphones, tablets and other mobile devices.