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New York, NY-- Sirius Satellite Radio, the premier satellite radio broadcaster, today announced that it will introduce a new, advanced audio enhancing technology in time for its nationwide service roll out on July 1.<P>This new version of the PAC v4 Audio Codec, developed by iBiquity Digital, is derived from a series of unique technologies that include the latest generation of psychoacoustic modeling, based on a deeper understanding of hearing physiology.<P>"We are thrilled to be introducing this new technology in time for our national service launch," said Joseph P. Clayton, President and CEO of Sirius Satellite Radio. "Combined with our S>PLEX statistical multiplexing capabilities and our in-depth programming, Sirius subscribers will now enjoy the highest levels of audio quality available in today's radio broadcasting environment."<P>"We've been working together with Sirius for several months now to develop this new software in time for their upcoming national launch," said Dr. Deepen Sinha of iBiquity. "The result is that Sirius listeners will experience brilliantly clear, rich sound quality that takes full advantage of the tonal ranges in the music offered."<P>According to iBiquity, this new version of PAC v4 Audio Codec is the most advanced audio compression software available on the market, and a significant advance over the previous generation of perceptual codecs. It responds rapidly to the dynamics of audio signals to provide an 'open sound-stage' effect, with a high dynamic range and stereo separation. It also uses a sophisticated model for encoding audio signal harmonics to achieve higher coding efficiency for complex signals.<P>In addition to the psychoacoustic modeling, the technology incorporates unique features such as an adaptive filtering capability and efficient multi- stage noiseless coding.<P>Designed by a research team led by Dr. Sinha, and formulated to work hand- in-hand with Sirius' S>PLEX technology, this new version of PAC v4 provides optimum sound quality for all channels, while maintaining maximum bandwidth efficiency.<P>S>PLEX is the sophisticated system, deployed by Sirius, which allocates bandwidth in real-time to music channels with more demanding sound, such as classical, jazz, and rock.<P>About iBiquity Digital<P>IBiquity Digital is the sole developer and licenser of digital AM and FM broadcast technology in the U.S., which will transform today's analog radio to digital, enabling radically upgraded sound and new wireless data services. The company's investors include 14 of the nation's top radio broadcasters, including ABC, Clear Channel and Viacom; leading financial institutions, such as J.P. Morgan Partners, Pequot Capital and J&W Seligman; and strategic partners Ford Motor Company, Harris, Lucent, Texas Instruments and Visteon. IBiquity Digital is a privately held company with operations in Columbia, MD, Detroit, MI and Warren, NJ.<P>About Sirius<P>From its three satellites orbiting directly over the U.S., Sirius broadcasts 100 channels of digital quality radio to motorists throughout the continental United States for a monthly subscription fee of $12.95. Sirius delivers 60 original channels of completely commercial- free music in virtually every genre, and 40 world-class sports, news and entertainment channels. Sirius has agreements to install AM/FM/SAT radios in Ford, Chrysler, BMW, Mercedes-Benz, Jaguar, Volvo, Mazda, Dodge, Jeep®, Volkswagen, Audi, Nissan and Infiniti vehicles. Kenwood, Clarion and Jensen satellite receivers, including models that can adapt any car stereo to receive Sirius, as well as home and portable products, will be available at retailers such as Circuit City, Best Buy, Good Guys, Tweeter, Ultimate Electronics and Crutchfield.<BR>
 
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