On the application layer, the stream is initiated and controlled via RTSP, RTP for the data transfer. On the transport layer, TCP or UDP are used. The connection is created via WPS and therefore is secured with WPA2. It allows sending up to 1080p HD video ( H.264 codec) and 5.1 surround sound ( AAC and AC3 are optional codecs, mandated codec is linear pulse-code modulation – 16 bits 48 kHz 2 channels). Miracast is based on the peer-to-peer Wi-Fi Direct standard. In 2017, Wi-Fi Alliance stated Miracast as a use for Wi-Fi Direct. In 2013, Nvidia announced support for Miracast. Devices that are Miracast-certified can communicate with each other, regardless of manufacturer. The Wi-Fi Alliance launched the Miracast certification program at the end of 2012. It can roughly be described as " HDMI over Wi-Fi", replacing the cable from the device to the display. Miracast (also called screen mirroring and wireless display among other names on consumer devices ) is a standard for wireless connections from sending devices (such as laptops, tablets, or smartphones) to display receivers (such as TVs, monitors, or projectors), introduced in 2012 by the Wi-Fi Alliance. Peer-to-peer wireless screencasting standard
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