Digital Media Center 1000 San Jose CA

provided by: Design News

A new media server from Harman Kardon won't lock up when users store, transfer, watch and listen to content from DVDs, CDs, cell phones and video cameras, thanks to the use of a specialized embedded operating system.

Known as the Digital Media Center 1000 (DMC 1000) (http://rbi.ims.ca/5724-536), the new media server is said to be the first of its kind to offer such a broad range of capabilities, which initially raised concerns among design engineers over the unit's ability to do so much without getting hung up in the process. "There are two things we didn't want," says Mike Heiss, senior technology strategist with the Harmon Kardon Consumer Group. "We didn't want a 'blue screen of death' and we didn't want an hourglass. Users will tolerate that in a computer, but they won't tolerate it in an electronic product."

To help deal with that challenge, Harman Kardon linked up with QNX Software Systems, a maker of real-time embedded operating systems (RTOS) and middleware for high-end network routers. Using the 6.3.2 version of the QNX Neutrino RTOS (http://rbi.ims.ca/5724-537), engineers from both companies worked on enabling the complex DMC 1000 box to work more reliably than a PC.

Engineers say the key to the box's performance is a modular architecture, along with an event-driven and time-triggered architecture. The event-driven architecture, they say, is responsible for handling the user interface, while the time-triggered part enables the system to pump out audio and video data synchronously.

"One of the keys is having a real-time operating system that allows you to build an architecture that can prioritize events appropriately," says Sebastien Marineua-Mes, vice president of research and development at QNX. "When you're pumping out video, you still need the ability to reserve part of your CPU to handle the user interface, so that the box is still responsive."

Harman Kardon engineers say the end result is a system that operates more like an audio/video system than a PC. "It's not meant to be a computer," says Heiss of Harman Kardon. "We went out of our way to make sure it wasn't one."

author: By Charles J. Murray, Senior Technical Editor, Electronics

Design News. Copyright © 2008 Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

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