Discovery and Launch
Discovery and Launch (DIAL) is a protocol co-developed by Netflix and YouTube with help from Sony and Samsung.[1] It is a mechanism for discovering and launching applications on a single subnet, typically a home network. It relies on Universal Plug and Play (UPnP), Simple Service Discovery Protocol (SSDP), and HTTP protocols. The protocol works without requiring a pairing between devices. It was formerly used by the Chromecast media streaming adapter that was introduced in July 2013 by Google. (Chromecast now uses mDNS instead of DIAL.)[2] DIAL enables what the TV industry calls second screen devices, such as tablet computers and mobile phones to send content to first screen devices, such as televisions, Blu-ray players, and set-top boxes.[3]
Terminology and operation
- 1st screen: a television, Blu-ray player, set-top-box, or similar device.
- 2nd screen: a smartphone, tablet, or similar device.
- DIAL Server: a device implementing the server side of the DIAL protocol, usually a 1st screen device.
- DIAL Client: a device that can discover and launch applications on a DIAL server – usually a 2nd screen device.
The DIAL protocol has two components, DIAL Service Discovery and the DIAL REST Service.[4] The DIAL Service Discovery enables a DIAL client device to discover DIAL servers on its local network segment and obtain access to the DIAL REST Service on those devices. The DIAL REST Service enables a DIAL client to query, launch and optionally stop applications on a DIAL Server device.
See also
- AirPlay
- Digital Living Network Alliance (DLNA)
- Jini
- Miracast
- Neighbor Discovery Protocol
- Service Location Protocol
- Simple Service Discovery Protocol
- Zero-configuration networking
References
- ↑ "The story behind DIAL: How Netflix and YouTube want to take on AirPlay — Tech News and Analysis". Gigaom.com. http://gigaom.com/2013/01/23/dial-open-airplay-competitor/. Retrieved 2014-06-04.
- ↑ Naddaf, Ali (May 1, 2014). "Google Cast Developers (Chromecast developer post)". Google+. https://plus.google.com/113598140850558213967/posts/jArqeF27Uza.
- ↑ "In the U.S., Tablets are TV Buddies while eReaders Make Great Bedfellows". http://blog.nielsen.com/nielsenwire/online_mobile/in-the-u-s-tablets-are-tv-buddies-while-ereaders-make-great-bedfellows/.
- ↑ "Protocol Specification - DIAL". 2014-05-20. https://sites.google.com/a/dial-multiscreen.org/dial/dial-protocol-specification. Retrieved 2014-06-04.
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