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What has changed in Miracast since its original release?
New enhancements focus on high-definition (HD) content, increased performance, and better battery life for Miracast devices.
Is a Wi-Fi connection needed to stream a video from the internet?
Miracast is unique to other wireless display solutions in that a direct peer-to-peer connection between two devices may be formed to share content residing on the source device, without the need for a Wi-Fi network. If streaming content from the internet, a network connection is required.
What is the relationship between Wi-Fi Aware and Wi-Fi Direct?
Wi-Fi Aware is a similar peer-to-peer connectivity technology to Wi-Fi Direct. However, while Wi-Fi Direct requires a centralized coordinator, called a Group Owner, Wi-Fi Aware creates decentralized, dynamic peer-to-peer connections. Many applications, such as Miracast and direct printer connections, work well with Wi-Fi Direct. Wi-Fi Aware is positioned to provide peer-to-peer connectivity in highly mobile environments, where devices join or leave in a less deterministic manner. Whether it's professionals at a crowded conference to find each other or strangers on a subway momentarily joining a multi-player game, Wi-Fi Aware connections seamlessly adapt to changing environment and usage conditions. 
Does Miracast support devices like wireless speakers? (audio only)
Audio-only devices are not part of the Miracast certification program.
How does Miracast protect premium content?
Miracast provides industry-standard protection of premium content through support of High-bandwidth Digital Content Protection (HDCP). HDCP is a wireless adaptation of the same trusted content protection mechanisms widely used for cabled interfaces, providing diversity in premium content options. This feature is designed to protect the digital rights of content owners and to encourage their efforts to make their content available.
What formats does Miracast support?
Miracast supports many commonly used audio/video format.  For a complete list, download the Miracast Technical Overview.
How is Miracast related to Wi-Fi Direct?
Wi-Fi Direct allows devices to connect directly to each other, without the need for a Wi-Fi access point (AP). It simply requires the push of a button or the entry of a PIN. Wi-Fi Direct allows source and display devices to discover one another and provides the underlying device-to-device connectivity for Miracast. Miracast builds upon Wi-Fi Direct with mechanisms to negotiate video capabilities, setup content protection (if needed), stream content, and maintain the video session.
Do Miracast devices implement the latest Wi-Fi core technology? What about technologies on the near horizon?
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.Miracast is expected to directly benefit from continuous advances in Wi-Fi performance, such as those offered by the upcoming 5 GHz program, based on 802.11ac.
What features does Miracast certification test?
Miracast certification includes testing for audio/video (A/V) latency, quality, and synchronization offset. Testing ensures that devices operate across vendors, provide simplified discovery and setup, meet the minimum display resolution requirement, and implement content protection (when implemented). Miracast devices are also tested for implementation of WPA2™ security. Wi-Fi Alliance members may view details on certification testing in the Wi-Fi CERTIFIED Miracast Test Plan.
Must both the content source and display be Miracast devices?
Both the display and the source devices must be Miracast certified. Miracast may be used on devices without embedded Wi-Fi capability by using a Miracast-certified adapter that supports an interface such as High-Definition Multimedia Interface (HDMI) or Universal Serial Bus (USB).

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