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Liquid Audio Granted Patent for Watermark Technology
Robust Watermark Technique Protects Music, Maintains CD-Quality Sound
REDWOOD CITY, Calif., April 11 /PRNewswire/ -- Liquid Audio, Inc. (Nasdaq: LQID - news) today announced that the U.S. Patent Office has awarded the company a patent (#6,209,094) for its technique of embedding watermark data in digital music files. The watermark technique, invented by Liquid Audio engineers in 1998, is part of Liquid Audio's Digital Rights Management (DRM) solution and is designed to help content owners protect their music for digital delivery without compromising audio quality or consumer flexibility.

(Photo: http://www.newscom.com/cgi-bin/prnh/19990915/LQIDLOGO )
Watermarking is a process whereby data that defines permissions for a digital music track is converted into sound, then ``mixed'' with the music. Media players can then be programmed to detect the watermark and obey the permissions set by the content owner. Liquid Audio's patent covers a technique for embedding watermark data in an audio signal that is both robust, cannot be removed from the audio without destroying the music, and imperceptible-cannot be heard by the music listener.

``This patent on our robust watermarking technique underscores Liquid Audio's commitment to provide innovative technology that addresses the current challenges of digital distribution,'' said Leon Rishniw, vice president of Engineering at Liquid Audio, Inc.

Liquid Audio offers a four-part DRM solution to protect music distributed on the Internet including encryption, watermarking, copy control and copyright management. Liquid Audio's DRM technologies were developed to provide content owners with a method to protect and enforce the rights associated with digital music that is published, delivered or accessed electronically. Liquid Audio DRM is one of the most widely used system to protect music copyrights and enables more than 10,500 artists from 1,200 labels to securely distribute their music online.

Liquid Audio, Inc. is a leading provider of software and services for the digital delivery of music over the Internet. The Liquid Audio solution gives musicians, record labels, Web sites and music retailers the ability to publish, syndicate and securely sell recorded music online with copy protection and copyright management. Using the Liquid(TM) Player software, available for free download at www.liquidaudio.com, music fans can preview and purchase downloadable music from the more than 1,000 affiliate Web sites in the Liquid Music Network(SM). Traded on Nasdaq under the symbol LQID, Liquid Audio is located in Redwood City, California.

NOTE: Liquid, Liquid Audio, the Liquid Audio logo, and Liquid Music are trademarks of Liquid Audio, Inc.

For more information about Liquid Audio software and services call 888-liquid-0 or visit http://www.liquidaudio.com.

SOURCE: Liquid Audio, Inc.


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