The HDMI standard has established itself as a mainstay of the post-HD digital age. While new versions have arrived and speeds have increased, the connectors have remained the same since their initial introduction.
So what’s the difference between standard HDMI, Mini HDMI, and Micro HDMI?
What Is HDMI?
To understand the different varieties of HDMI cables in use, it’s a good idea to get a basic understanding of what HDMI is. HDMI stands for High Definition Multimedia Interface. It’s a digital standard designed to transport video and audio from a source (like a Blu-Ray player or game console) to a display or recorder.
HDMI has seen several iterations, each increasing the bandwidth throughput to allow for higher resolutions and increased framerates. The latest standard is HDMI 2.1, which allows for 48Gbps total throughput, or enough bandwidth for an uncompressed 12-bit 4K HDR signal at 120Hz.
Regardless of whether you’re using full-fat HDMI (also known as Type-A) or a smaller variant, the standard uses 19 pins to carry various signals including video and audio, clocks to keep things in sync, 5V of power, and even Ethernet data.
A standard Type-A HDMI cable, like the one you would find in the back of your TV or a game console, uses a relatively large 14 x 4.55 mm connector that can only be inserted one way.
What Is Mini HDMI?
Mini HDMI, also known as Type-C, is a smaller version of the digital interface. The connector measures only 10.42 x 2.42 mm and also features 19 pins, though the arrangement is slightly different from the larger Type-A connector. It’s not uncommon to find HDMI cables with both a Type-A and Mini HDMI (Type-C) connector.
While there is plenty of interface room on larger devices like games consoles and televisions, smaller devices often need to conserve space. This is where Mini HDMI comes in, providing all the benefits of the HDMI interface in a much smaller form factor.
The most common devices that use Mini HDMI are digital cameras and camcorders. Some laptops also use the smaller form factor, as do some smaller computers like the Raspberry Pi Zero.
What Is Micro HDMI?
Micro HDMI, also known as Type-D, shrinks the interface to an even greater degree. The connector is only 6.4 x 2.8 mm, but all 19-pins are present (though the layout is different from both standard and Mini connectors). Micro HDMI is less prevalent than the other two variants and has fallen by the wayside in recent years.
Some Android phones like the Motorola Droid X, HTC One VX, Samsung Galaxy Note II, and LG Optimus G use these connectors. If these all sound old to you, you’d be right. Most Android phones now use the more ubiquitous USB-C connection, many of which can support HDMI output using a USB-C to HDMI adapter.
Arguably the most common devices to still use Micro HDMI are GoPro action cameras. The GoPro Hero 4, Hero 5 Black, Hero 6 Black, and Hero 7 Black all have Micro HDMI ports, while the Hero 8 Black and Hero 9 Black action cameras still use Micro HDMI with the Media Mod (sold separately).
HDMI Is Here to Stay (For Now)
The beauty of HDMI is how each new iteration maintains compatibility with previous versions. You can take an HDMI connection from an old laptop or Xbox 360 console and display it with no issues on a brand new 8K television.
Contrast this with older analog standards which often require intermediary devices to convert SCART, component, S-video, or similar connections to digital-ready HDMI. Without such an interface it’s difficult to display older consoles and computers on a modern television.
The latest standard of HDMI 2.1 is fairly new, with the first source devices like the Xbox Series X, PlayStation 5, and NVIDIA’s 30-Series graphics cards arriving in 2020. While standards are constantly moving forward, HDMI 2.1 provides more than enough bandwidth for the foreseeable future.
HDMI 2.1 supports 10K streams at 120Hz with display stream compression, enhanced Audio Return Channel (eARC) for soundbars and home theatre receivers, audio formats like Dolby Atmos, and gaming features like native variable refresh rate (VRR) technology.
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