Press Release

SUNNYVALE, Calif.--(BUSINESS WIRE)--May 23, 2008--Harmonic Inc. (Nasdaq:HLIT) today announced that Patrick Harshman, President and CEO, and Robin Dickson, Chief Financial Officer, will make presentations at the following investor conferences:

    --  Lehman Bros. 9th Annual Worldwide Wireless and Wireline
        Conference -- Wednesday, May 28 at 2:15 P.M. (Eastern Time);

    --  Friedman Billings Ramsey Capital Markets 12th Annual Spring
        Investor Conference -- Thursday, May 29 at 1:35 p.m. (Eastern
        Time); and

    --  Cowen and Company 20/20 TMT Conference -- Thursday, May 29 at
        4:50 p.m. (Eastern Time).

The live webcasts of Harmonic's presentations will be available from Harmonic's website, www.harmonicinc.com, under the Investor Relations Events section. The replays will be available after 6:00 P.M. (Pacific Time) on the date of the presentation at the same Web address.

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 utilize Harmonic's digital video, broadband optical access and software solutions to offer consumers a compelling and personalized viewing experience.

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.

    CONTACT: Harmonic Inc.
             Robin N. Dickson, 408-542-2500
             Chief Financial Officer
             or
             StreetConnect
             Michael Newman, 408-542-2760 (Investor Relations)

    SOURCE: Harmonic Inc.