Wi-Fi CERTIFIED Miracast™: Extending the Wi-Fi experience to seamless video display - Industry (2012)

The stunning growth in multimedia traffic, especially for video and gaming, is accompanied by a fundamental shift in how, when and where users access content. Now more than ever, users have a wide range of Wi-Fi-capable devices, such as smartphones, tablets, laptops, TVs, and gaming consoles. Whether in the home or in a mobile environment, users interact with multiple Wi-Fi devices, some of which store content locally and some of which are better suited for displaying content. For example, users may want to stream a movie from the internet to a tablet, but display it on a television in their living room.

The Wi-Fi Alliance has launched a new certification program, Wi-Fi CERTIFIED Miracast™, developed with the support of a wide ecosystem of silicon, mobile device and consumer electronics (CE) vendors, to make sharing of screens including graphical, video and audio content across Wi-Fi devices seamless. After initially pairing two Wi‑Fi devices, users can choose to stream content or mirror a display from one device (the source) to a second device (the display). Miracast allows users to establish a direct Wi-Fi connection between two devices, eliminating the need for an existing network.

Miracast builds upon Wi-Fi to give users the freedom to display content on the device of their choice, while retaining the ease of use, interoperability among vendors, and security that all Wi-Fi CERTIFIED products share. Miracast supports the most widely used codecs and video formats, to enable users to view the audio and video content they want on the devices they choose.

Miracast uses many of the building blocks that, over the years, have enriched the user experience and increased their trust in Wi-Fi, including Wi-Fi CERTIFIED n (improved throughput and coverage), Wi-Fi Direct™ (device-to-device connectivity), Wi-Fi Protected Access® 2 (WPA2™) (security), Wi-Fi Multimedia™ (WMM®) (traffic management) and Wi-Fi Protected Setup™. Some Miracast devices will also support Tunneled Direct Link Setup (TDLS), which allows them to connect via an infrastructure network. TDLS enables more efficient data transfer and the use of more advanced Wi-Fi capabilities than those supported by the legacy infrastructure network through which the devices are connected.

Miracast is an optional certification program for client devices capable of supporting video, such as TVs, over-the-top set-top boxes, cameras, projectors, smartphones, tablets, and laptops. To enjoy Miracast, both the display and the source devices must be certified for Miracast. Miracast may be used on devices without embedded Wi‑Fi through the use of a Miracast-certified adapter that supports an interface such as High-Definition Multimedia Interface (HDMI) or Universal Serial Bus (USB).

The list of devices certified for Miracast is available in the online database of Wi-Fi CERTIFIED products on the Wi-Fi Alliance website (www.wi-fi.org).

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