Harmonic Highlights IP-Based Video Solutions at NAB2007.

SUNNYVALE, Calif. -- At NAB2007 booth #SU9620, Harmonic Inc. (NASDAQ:HLIT) will introduce new systems and feature its latest digital video solutions for the next generation of IP-based broadcast and on-demand services. Harmonic continues to set the industry standard with world-leading MPEG-2 and

MPEG-4 AVC (H.264) compression and stream processing solutions, as well as an integrated everything-on-demand video delivery platform. NAB, an annual exhibition and conference which draws more than 100,000 professionals from 140 countries, is being held in Las Vegas from April 14-19.

Harmonic is at the forefront of making the all-IP, all-on-demand video network a reality, with flexible and high performance solutions that enable service providers to meet growing consumer demands for a more personalized "anytime, anywhere" experience and pristine high definition (HD) programming. Leading broadcast, cable, satellite and telco operators around the world are taking advantage of Harmonic's bandwidth-efficient systems to improve their service-carrying capacity, introduce new revenue-generating services and deliver superior picture quality to their subscribers.

"Today's market dynamics are characterized by fast-paced growth of services such as video-on-demand and HD," said Patrick Harshman, President and CEO of Harmonic Inc. "IP technologies are making it possible for operators to create a new experience for viewers as well as simplifying the video infrastructure. Harmonic's new IP-based solutions, offering a range of benefits including greater scalability and versatility, have been very well received by leading operators worldwide as they launch and expand their video services. At NAB2007, we will continue to build on that strength with a number of new enhancements to our IP-based product portfolio."

Solutions featured at NAB2007 include:

* MPEG-2 and H.264 high definition and standard definition (SD) compression systems, including the DiviCom[R] Electra[TM] 7000 HD and Electra 5400 SD H.264 encoders. Introduced in the second half of 2006, these multi-service platforms have been selected by more than 20 satellite, cable, terrestrial and IPTV operators around the world for new H.264 video services.

* An integrated and enhanced on-demand video delivery platform that encompasses live and offline content creation, automated ingest, Armada[R] intelligent content distribution and delivery to the StreamLiner[R] video servers.

* An IP-based ATSC headend, which includes multiple MPEG-2 HD channels and SD video delivered in the allocated spectrum using Harmonic's market-leading MV 500 HD encoder, Electra 1000 multi-channel SD encoder and DiviTrackIP[TM] statistical multiplexing.

* Next generation solutions for distribution and contribution, as well as a range of new and existing stream processing capabilities available on the ProStream[TM] 1000 stream processing platform, including ProCipher[TM] AES bulk scrambling/descrambling, Mentor[TM] re-encoding and multiplexing.

* H.264 splicing and ad insertion with the ProStream 2000 HD/SD splicer and StreamLiner ad server.

In addition, a number of recognized industry experts from Harmonic will participate in various technical conferences held in conjunction with NAB2007:

* At the PBS Technology Conference on April 13, David Price, Vice President of Business Development and Marketing will be a panelist in the "All Together Now: Readying Your Program Streams for the Last Mile" session.

* Mr. Price will also speak and serve as a moderator at the MPEG Industry Forum Master Class on April 15. Thierry Fautier, Director of Telco Solutions, will participate in the "High Retention by Definition" session.

* Arnaud Perrier, Senior Manager, High Definition Encoders, will discuss "True HD Quality: The MPEG-2/H.264 Paradigm" at the Telecom@NAB2007 Conference on April 17. In addition, Mr. Price will speak on the topic "Making TV over DSL a Success".

* At IPTV World on April 18, Mr. Price will participate in the "Making Money from Next-Gen Technologies" session.

About Harmonic Inc.

Harmonic Inc. is a leading provider of versatile and high performance video solutions that enable service providers to efficiently deliver the next generation of broadcast and on-demand services including high definition, video-on-demand, network personal video recording and time-shifted TV. Cable, satellite, broadcast and telecom service providers can increase revenues and lower operational expenditures by using Harmonic's digital video, broadband optical access and software solutions to offer consumers the compelling and personalized viewing experience that is driving the business models of the future.

Harmonic (NASDAQ:HLIT) is headquartered in Sunnyvale, California with R&D, sales and system integration centers worldwide. The Company's customers, including many of the world's largest communications providers, deliver services in virtually every country. Visit www.harmonicinc.com for more information.

This press release contains forward-looking statements within the meaning of Section 27(A) of the Securities Act of 1933 and Section 21(E) of the Securities Exchange Act of 1934, including statements related to: the introduction of new systems and the latest digital video solutions, the fast-paced growth of services, creating a new experience for viewers as well as simplifying the video infrastructure, and continuing to build on the strength of Harmonic's new IP-based solutions.

Our expectations and beliefs regarding these matters and the anticipated benefits of the products and solutions to be shown at NAB2007 may not materialize, and actual results could differ materially from those projected. The forward-looking statements contained in this press release are also subject to other risks and uncertainties, including those more fully described in Harmonic's filings with the Securities and Exchange Commission including its recent Reports filed on Form 10-K and Form 10-Q. Harmonic does not undertake to update any forward-looking statements.

EDITOR'S NOTE - Product and company names used herein are trademarks or registered trademarks of their respective owners.