Feeds

DLNA compliance testing: It ain't working

Iomega NAS not talking to Sony TV - whose fault is that?

Beginner's guide to SSL certificates

Comment Alastair Morrison was stumped; his Iomega NAS sent MP3 files to be played on a Sony Bravia TV, and they stuttered to a halt after a few seconds, yet both devices were DLNA-compliant.

The Digital Living Network Alliance (DLNA) is an industry body concerned to develop standards to enable storage devices and playing devices to interoperate such that sound, image and video files can be stored on the former and sent to the latter for playback. The notion is the classic standards idea; have one open standard replacing a plethora of proprietary ones and provide a level digital media storage and playback playing field for consumers.

Device suppliers become members of the DLNA and their products get DLNA-compliance by passing tests at Independent Certification Vendors' laboratories (ICVs) that are accredited by DLNA to perform interoperability testing services as part of the requirements set by the DLNA certification and logo program. The certification program verifies that DLNA products comply with the DLNA Networked Device Interoperability Guidelines.

Scott Smyers, DLNA president and chairman, says: "The DLNA certification and logo program delivers a level of assurance to the industry and to consumers that products with a DLNA Certified logo have passed rigorous testing to be able to share digital content between devices within a home network."

But is DLNA-compliance worth the paper it's printed on? Alastair Morrison's Iomega Home Media Network Hard Drive and Sony Bravia KDL40W4500 digital TV are both represented as being DLNA-compliant. Iomega describes the HMNHD as enabling you to "play back your pictures, videos and music from digital media adapters such as game consoles, digital picture frames or networked TVs".

The Sony Bravia KDL40W5400 is described as having "DNLA media streaming capabilities, allowing you to view photos and listen to music from compatible networked devices".

Neither device is actually tested interoperating with the other. DLNA-compliant candidate devices pass formal tests on their own at the Certification Vendors' labs and, if they work, that is deemed to be that; they are assumed to then interoperate correctly with every other DLNA-compliant device.

There is no central DLNA consumer support facility. If consumers find devices don't work then they have to have recourse to the suppliers of each device concerned, a process almost designed to encourage finger-pointing between the suppliers.

Both Sony and EMC, Iomega's parent, are listed on the DLNA member list. There is a listing there for Sony's Bravia KDL40W5400.

But here's a curious thing. There is no listing of Iomega's HMNHD as a DLNA-compliant device on the DLNA website. In fact no Iomega device is so listed. However, there is a listing for a TwonkyMedia 4.4 (media serving code) product from PacketVideo.

Intelligent flash storage arrays

More from The Register

next story
Download alert: Nearly ALL top 100 Android, iOS paid apps hacked
Attack of the Clones? Yeah, but much, much scarier – report
Broadband sellers in the UK are UP TO no good, says Which?
Speedy network claims only apply to 10% of customers
Virgin Media struck dumb by NATIONWIDE packet loss balls-up
Turning it off and on again fixes glitch 12 HOURS LATER
Fujitsu CTO: We'll be 3D-printing tech execs in 15 years
Fleshy techie disses network neutrality, helmet-less motorcyclists
Facebook, working on Facebook at Work, works on Facebook. At Work
You don't want your cat or drunk pics at the office
Soz, web devs: Google snatches its Wallet off the table
Killing off web service in 3 months... but app-happy bonkers are fine
Ofcom tackles complaint over Premier League footie TV rights
Virgin Media: UK fans pay the most for the fewest matches
Yahoo! blames! MONSTER! email! OUTAGE! on! CUT! CABLE! bungle!
Weekend woe for BT as telco struggles to restore service
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Internet Security Threat Report 2014
An overview and analysis of the year in global threat activity: identify, analyze, and provide commentary on emerging trends in the dynamic threat landscape.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.