The DLNA Media Format Model

Topics: Streaming media, Digital Living Network Alliance, Multimedia Pages: 8 (2731 words) Published: October 24, 2013
In our daily life, we see an increasing need for Digital contents at home. This proliferation of  contents and the expanding variety of connected and IP-enabled consumer electronics devices,  have also incredibly increased the complexity for consumers. DLNA aims at bringing solution that looks ahead to the emergence of the multi-media networked world. DLNA is a standard used by manufacturers of consumer electronics,mobile device and personal computer to allow entertainment devices within the home to share their content with each other across a home network. It is designed to be easy to use and technology seamless for the users. DLNA is an acronym for Digital Living Network Alliance. It is a capability in a device allowing it to talk to other devices with another DLNA device. It interconnects electronic devices within a zone, providing a seamless environment for sharing and growing new digital media and content services. DLNA devices supports functions such as controlling, uploading, downloading, printing, as well as server and player functions for various appliances including mobile phones, digital TVs, digital cameras, HDD recorders, printers and more. ETSI Plugtests ™ organised the 29th  DLNA (Digital Living Network Alliance) Interoperability Test Event in July 2011.  The tests used in this event were performed following the  latest DLNA Test specification, DLNA V1.5 Expanded Guidelines Certification Test Plan , Version: 1.81 (March 17th , 2011 ). DLNA Interop events are regurlarly organised worldwide and it encourages DLNA member companies to attend with products currently in development. During an interop event, products are tested in a DLNA-compliant network with other products and testing tools. Interoperability is of great benefit to the DLNA devices manufacturers. This is a very effective way to prepare a product for DLNA certification testing and may even uncover areas of development in the DLNA guidelines.

Network and Connectivity
The IPv4 family of protocols is the foundation for networking and connectivity in the digital home. Internet Protocol (IP) also provides underlying network communications for devices on the Internet. IP is based on industry standard specifications, implemented and supported in a wide range of devices with more than two decades of deployment in government, academic and commercial environments. There are several advantages to using IP in the digital home: IP allows applications running over different media to communicate transparently. For example, a PC or an advanced set top box may stream media content to a television in the master bedroom through an Ethernet cable to an 802.11 Access Point and then wirelessly to the television. With IP, the media server and the television are unaware that the media content travels over two separate physical media. For direct peer-to-peer communications of a mobile device transmitting to a stationary device, IP provides the unifying framework to make applications independent of the actual transport technology. IP can connect every device in the home to the Internet. Since IP is the protocol of the Internet, any device in the digital home can be potentially connected to any other Internet-connected device in the world. IP connectivity is inexpensive. Because it is ubiquitous, economies of scale and competition combine to make physical media implementations of IP available at lower cost than other technologies. As of the publication of the 2011 Guidelines, [CZ1] DLNA now supports connectivity through the following IP based technologies: Ethernet, Wi-Fi 802.11 (a,b,g,n), Bluetooth, HPNA, MOCA and Wi-Fi Direct. Recognizing these advantages, the DLNA Networked Device Interoperability Guidelines are intended to facilitate simple, interoperable connectivity, while meeting the consumers’ needs today and in the future. The Internet Engineering Task Force is standardizing IPv6 as an improved version of IP and is actively pursuing a range of transition...
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