Dolby sues RIM over patent payments

Sound twiddlers Dolby Laboratories has sued BlackBerry maker Research In Motion over royalty payments.

In suits filed in filed in the United States and Germany, Dolby has asked for an injunction on sales of the BlackBerry and RIM's new PlayBook tablet unless it agrees to cough up.

Dolby said RIM is making use of patented technologies covering the 'lossless' compression of digital audio files, using 'spectral band replication' and 'parametric stereo' which Dolby invented.

Dolby claims “all other major smartphone makers have agreed to license” the technology and the Canadian outfit is the only one failing come up with the cash.

“Litigation was regrettably our last resort after RIM declined to pay for the use of Dolby’s technology,”the company's general counsel Andy Sherman said in a statement. “We have a duty to protect our intellectual property.”