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.

Secure remote control for conventional and virtual desktops

More from The Register

next story
Sea-Me-We 5 construction starts
New sub cable to go live 2016
Vodafone to buy 140 Phones 4u stores from stricken retailer
887 jobs 'preserved' in the process, says administrator PwC
BT claims almost-gigabit connections over COPPER WIRE
Just need to bring the fibre box within 19m ...
EE coughs to BROKEN data usage metrics BLUNDER that short-changes customers
Carrier apologises for 'inflated' measurements cockup
Comcast: Help, help, FCC. Netflix and pals are EXTORTIONISTS
The others guys are being mean so therefore ... monopoly all good, yeah?
Surprise: if you work from home you need the Internet
Buffer-rage sends Aussies out to experience road rage
EE buys 58 Phones 4u stores for £2.5m after picking over carcass
Operator says it will safeguard 359 jobs, plans lick of paint
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.