![]() The optional back channel (UIBC) can be used for human-interface devices or for general data, eg. HDCP is supported for content protection. There’s 2-channel compressed or uncompressed digital audio or Dolby AC3 streams for surround sound. Miracast supports up to 1920 x 1200 60 fps source streams transmitted using the (lossy) MPEG2 standard. Update: DIAL protocol tested in Windows 10. It looks like that performance gap will be closed now though because Microsoft are adding extensions and improvements to Windows 10 Casting (AKA MS Miracast.) The user experience will be better, paring over WiFi Direct will be faster and there’ll be a back-channel for user interface control (touchscreens.) We’ve tested it and it’s true. Intel’s WiDI screen casting hardware was always a step ahead of the Miracast implementation it was built around but it was largely irrelevant because Windows 8 only ever supported Miracast. ![]() We’ve been tracking wireless display ever since it was an Ultrabook feature.
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