Press Release

SUNNYVALE, Calif.--(BUSINESS WIRE)--April 18, 2006--At NAB2006 booth #SU1383, Harmonic Inc. (Nasdaq:HLIT) will showcase advanced broadcast and stored content solutions that enable an anytime, anywhere, more personalized TV experience. These dynamic high definition (HD) and standard definition (SD) systems extend a video service provider's reach, range of services and revenue potential while offering the highest levels of performance, scalability and availability. A leading provider of digital video, broadband transport and IP-delivery solutions, Harmonic is multiplying the power of TV(SM) for terrestrial, satellite, cable, telco/IPTV and wireless operators around the world. NAB2006, which is attended by more than 100,000 media industry professionals from 130 countries, is being held April 24-27 in Las Vegas.

Today, television is undergoing a fundamental transformation from a "one for all" broadcast model to an enhanced on-demand experience that gives viewers more flexibility and choice in how, when and where TV can be watched. Harmonic is facilitating this transition with versatile standards-based solutions that enable the delivery of pace-setting MPEG-4 AVC (H.264) and MPEG-2 SD/HD services to TVs, PCs, handhelds, mobile phones and other yet to be imagined devices. Harmonic's multi-service (multi-codec, multi-channel, multi-format) systems generate superior picture quality at ultra-low bit-rates, and make it possible for operators to deliver advanced services such as picture-in-picture (PiP), multi-channel mosaics and mobile video. In addition, Harmonic's storage encoding solution allows cable, IPTV and other operators to capture, compress and store both short and long form content for use in a variety of applications including dynamic ad insertion and content-on-demand.

"Harmonic's market-leading video solutions power many of the innovative broadcast and on-demand television services currently available around the world, including more top tier telco IPTV channels than any other brand," said Dr. Patrick Harshman, Executive Vice President of Harmonic Inc. "As the world moves rapidly toward a fully customized and interactive 'just for me TV' experience, Harmonic is continuously evolving its product and solution portfolio. Our solutions enable operators to deliver this new anytime, anywhere and on any device viewing model, providing impactful, personalized services that better attract and retain subscribers."

    At NAB2006, Harmonic will feature:

    --  The latest ultra-low bit-rate MPEG-4 AVC (H.264) and MPEG-2
        SD/HD encoding.

    --  A multi-service encoding solution that simultaneously delivers
        CBR and VBR MPEG-4 AVC and MPEG-2 SD video at full and reduced
        resolutions to support a unified digital headend, advanced
        PiP, streaming video to the PC and other emerging
        applications.

    --  An IP-based MPEG-in/MPEG-out multi-channel video mosaic
        solution that provides a new paradigm for program viewing,
        channel navigation, advertising and service cross-promotion.

    --  An MPEG-2 and MPEG-4 AVC SD/HD storage encoding solution that
        generates low bit-rate video with superior picture quality,
        enhancing the scalability of VOD, nPVR and RS-PVR, as well as
        enabling dynamic ad insertion and emerging targeted
        advertising services.

    --  A powerful IP-based statistical multiplexing solution that
        reduces costs and complexity, improves scalability and
        availability, and supports centralized and distributed pools
        while generating the highest video quality and channel density
        within the available bandwidth.

    --  A compact multi-channel, multi-format (SD/HD) ATSC broadcast
        solution with schedule-based automated system mode change
        based on time-of-day and day-of-week.

    --  An integrated digital program insertion (DPI) solution that
        simplifies the process of regionalizing and personalizing
        broadcast and on-demand TV with advertisements as well as
        short/long form programs.

    --  New integrated receiver and decoder modules for use as part of
        a comprehensive content acquisition and monitoring solution.

    --  A service-oriented distributed monitoring and control solution
        for broadcast and on-demand services.

A recognized technology innovator, Harmonic has been selected to speak at the NAB2006 Broadcast Engineering Conference, the Advanced Video Services: From Broadband to Wireless Conference and IPTV World. Jean-Christophe Morizur, Senior Director of Digital Video Product Marketing for Harmonic Inc., will present a paper entitled "MPEG-2 Statistical Multiplexing over IP: A New Paradigm for Content Aggregation" as part of the "What is Broadcast Quality?" Session on April 23 at 10:30 a.m. PDT. Also on April 23, David Price, Vice President of Product Marketing and Business Development, will discuss MPEG Standards at 1:30 p.m. PDT during the joint MPEG Industry Forum, ISMA and NAB event. Mr. Price will moderate the IPTV World "How to Build an IPTV Network" Session on April 26 at 5:40 p.m. PDT.

About Harmonic Inc.

Harmonic Inc. is a leading provider of digital video, broadband optical networking and IP delivery systems to cable, satellite, telecom and broadcast network operators. Harmonic's open standards-based solutions for the headend through the last mile enable customers to develop new revenue sources and a competitive advantage by offering powerful interactive video, voice and data services such as video-on-demand, high definition digital television, telephony and Internet access.

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: a fundamental transformation of television which Harmonic facilitates with standards-based solutions, multi-service systems and its storage encoding solution, and the features and benefits of various products to be demonstrated at NAB2006.

Our expectations and beliefs regarding these matters 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.

    CONTACT: Harmonic Inc.
             Sarah Lum, +1-408-543-2392 (Media Relations)
             sarah.lum@harmonicinc.com
             or
             StreetConnect (for Harmonic)
             Michael Newman, +1-408-542-2760 (Investor Relations)
             hlit@stct.com

    SOURCE: Harmonic Inc.