KT SELECTS HARMONIC FOR DUAL SATELLITE AND TERRESTRIAL DISTRIBUTION OF PRIMARY AND BACKUP CHANNELS

SUNNYVALE, CALIF. -- DECEMBER 7, 2009 -- Harmonic Inc. (NASDAQ: HLIT) today announced that KT (KSE: 030200), a leading integrated telecommunications company in Korea, has deployed Harmonic's Ellipse(TM) 1000 contribution encoder, ProView(TM) 2900 integrated receiver/decoder (IRD) and network management solution for distribution of primary and backup broadcast channels to over 160 cable operators nationwide. This deployment enables KT to provide cost-effective and secure satellite distribution with terrestrial IP backup services, and deliver additional channels--thereby facilitating robust content contribution and maximizing bandwidth utilization.

"Harmonic's solutions provide us with the solid foundation in which to grow our business and further enhance services to our customers," said Sangku Chang, Director at KT. "With Harmonic's superior and versatile technology, we are able to build upon our legacy systems to create an end-to-end solution for contribution and distribution applications, so we can continue to offer state-of-the-art services now and in the future."

The Ellipse 1000 encoder for fixed contribution allows KT to simulcast the same content to both satellite and terrestrial distribution paths, in variable bit-rate (VBR) for satellite distribution and constant bit-rate (CBR) for terrestrial distribution. The Ellipse 1000 also provides KT with full encryption capabilities to secure content for both distribution paths. Additionally, the Ellipse 1000's advanced encoding technology and bandwidth efficiency gives KT the option to add more channels in the future.

Harmonic's professional ProView 2900 IRD is a broadcast-quality decoder, decryptor and interface converter that provides MPEG-2 and MPEG-4 AVC (H.264) standard definition decoding, advanced transport stream processing, cutting-edge IP processing technologies and a variety of front-ends, including DVB-S2 and MPEG over IP.

"Harmonic's Ellipse 1000 and ProView 2900 provide KT with a cost-effective platform that builds upon their legacy systems to deliver significant operational efficiencies and advantages," said Nimrod Ben-Natan, Vice President of Product Marketing, Solutions and Strategy for Harmonic Inc. "KT's selection of our Ellipse and ProView products, following our acquisition of Scopus Video Networks earlier this year, further demonstrates our growing momentum in the contribution and distribution sector."

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About KT

KT Corporation is an integrated telecommunications service provider in Korea. Services include telephone services, including local, domestic long-distance and international long-distance fixed-line services and interconnection services to other telecommunications companies; broadband Internet access and other Internet-related services, including Internet protocol television (IP-TV); personal communications system (PCS) mobile telecommunications service and third-generation High Speed Downlink Packet Access (HSDPA)-based IMT-2000 wireless Internet and video multimedia communications services, and various other services, including leased line and other data communication service, satellite service and information technology and network services. For more information visit www.kt.com.

About Harmonic Inc.

Harmonic Inc. is redefining video delivery with the industry's most powerful solutions for delivering live and on-demand video to TVs, PCs and mobile devices. Harmonic's 20 years of technical innovation and market leadership enable the company to offer a unique and comprehensive solution portfolio--including encoding, transcoding, content preparation, stream processing, asset management, edge processing, and delivery. Broadcast, cable, Internet, mobile, satellite and telecom service providers around the world choose Harmonic's IP-based digital video, software, and broadband edge and access solutions. Using these award-winning and industry-leading solutions, operators can reduce costs and differentiate their services by offering consumers a higher quality, personalized multi-screen 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.

This press release may contain 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: providing KT with the solid foundation in which to grow its business and further enhance services to its customers, continuing to offer state-of-the-art services now and in the future, and giving KT the option to add more channels in the future.

Our expectations and beliefs regarding the capabilities of Harmonic's solutions for contribution and distribution applications and the anticipated benefits for KT 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.

ENDS