Definition: Miracast is a point-to-point, enhanced version of WiFi Direct, that allows both audio and video content transfer between two devices without the need to be near a WiFi Access Point, the use of a router, or integration within full home or office network.
As a result of its point-to-point operation, audio and video signal transfer via Miracast is not affected by crowded network traffic or other network connectivity issues. If you have both a Miracast-enabled source and destination or display device, you are all set to go. The Miracast protocol allows for transfer of both audio and video content, and has support for H.264. In addition, Miracast provides WPA2 security.
Miracast is in the process of being implemented in a number of devices, including TVs, Video Projectors, Blu-ray Disc players, home theater receivers, cable/satellite boxes, smartphones, tablets, laptop PCs, and more...
As of 2013, it is being incorporated into some Blu-ray Disc players from LG and Blu-ray Disc and media players from Panasonic (where it is referred to Display Mirroring), as well as some TVs from LG. There will be more to follow.
As Miracast becomes available on more portable and home theater products, users will find it more convenient to transfer audio and video between devices, such as pushing video content from a smartphone or tablet to a TV, or transferring content being viewed on a TV from a cable/satellite/media streamer box to a tablet for portable viewing. Also, if you have a laptop or tablet and a video projector that are Miracast-enabled, you can easily transfer a business or classroom presentation from the laptop or table to the video projector for big screen display.
Using Miracast: To use Miracast, you first have to enable it on both your source and destination device according to the menu interface on the two devices. You then "tell" your source device to search for the other Miracast device and then, once your source device finds the other device, and the two devices recognize each other, you initiate a pairing procedure.
You will know that everything is operating correctly when you see (and/or hear) your content on both the source and destination device. Then you can access additional features, such as transferring or pushing content between the two devices if those features are available to you. Another thing to point out is that you only need to pair the devices once. If you come back later, the two devices should automatically recognize either other without having to be "re-paired".
Possible Use Example: I have a video on my Android tablet that I would like to watch on my TV, so I can share it with the whole family. Since my TV and tablet are both Miracast-enabled, I just sat down on the couch, paired the tablet with the TV, and pushed the video wirelessly from the tablet to the TV.
When we were done watching the video, I just pushed the video back to the tablet where it is saved, and while the rest of the family watched a regular TV program, I went into my home office and used the tablet to access some notes I took at a meeting earlier in the day.
Miracast specifications and product certification approvals are administered by the WiFi Alliance.
Stay tuned for more information on Miracast within the home theater environment as it becomes available.
Also Known As: Display Mirroring
Alternate Spellings: Miracast, MiraCast