With today's high technology developing, we can realize more and more novel things that we have never heard before. When it comes to mirroring a device's screen wirelessly or using it as a remote-control for media displayed on another screen, there is still a wide variety of competing standards fighting it out in the market. And indeed, a number of mobile devices support Miracast, a new wireless display standard that allows you to stream content directly to your TV.
Do you know the latest the wireless tech that lets you duplicate your Android device's screen on your TV so you can watch HD movies, play music, or supersize your favorite apps. Yeah, hdmi dongle allows you to connect almost any device to a TV or another external display, but HDMI requires a wired connection. You might assume there'd be a well-supported standard for wireless displays, but you'd be wrong.
WiDi is short for Intel Wireless Display, a feature associated with Intel's Wi-Fi Direct standard. This is Intel's attempt at offering a wireless video and audio streaming system that could compete with Apple's AirPlay. WiDi never saw much uptake.
Intel Wireless Display 3.5 makes WiDi Miracast-compatible, essentially turning WiDi into another branded Miracast-compatible standard. Intel has basically folded WiDi into Miracast.
AirPlay is Apple's wireless display standard. It allows you to stream video from an iPhone, iPad, or Mac to an Apple TV. Using AirPlay, you can display the contents of your Mac's desktop, start a video in an app on your iPhone and “push” it to your TV, or play a game on your iPad and mirror your display on your TV.
Apple's AirPlay standard is flexible enough to work in two different ways. It can use display mirroring to mirror the contents of a device's display, or use a streaming mode that's smarter. For example, you could play a video in an app on an iPhone and use the playback controls on your iPhone to control the video on your TV. Even while fiddling with the playback controls on your iPhone's screen, they wouldn't appear on your TV — AirPlay is smart enough to stream only the content you want to see on the display.
When Google launched the Nexus 4 with Android 4.2 in 2012, they talked up its support of Miracast. Soon, they said, you'd be able to buy cheap Miracast-compatible receivers that you could plug into your TV's HDMI port. The wireless display problem would be solved, enabling easy display-mirroring from Android and Windows devices.
Miracast is an industry-wide standard that's essentially a response to Apple's AirPlay. Miracast support is build into Android 4.2+ and Windows 8.1, allowing Android smartphones, Windows tablets and laptops, and other devices to wirelessly stream to Miracast-compliant receivers.
In theory, iphone Miracast is great. In practice, Miracast hasn't worked out so well. While Miracast is theoretically a standard, there are only a handful of Miracast receivers out there that actually work well in practice. While devices are supposed to interface with other devices that support the standard, many Miracast-certified devices just don't work (or don't work well) with Miracast-certified receivers. The standard seems to have collapsed in practice — it's not really a standard.
Play To, DLNA, UPnP
DLNA stands for “Digital Living Network Alliance.” DLNA uses Universal Plug and Play (UPnP) — but DLNA isn't really a wireless display solution. Instead, it's simply a way to take content on one device and play it on another. For example, you might open Windows Media Player on your PC and use the Play To feature to play a video file from your computer's hard drive to an audio/video receiver connected to your TV, such as a game console. Compatible devices automatically advertise themselves on the network so they'd appear in the Play To menu without any further configuration needed. The device would then connect to your computer over the network and stream the media you selected.