Harmonic Optimizes Subscriber Experience With IRIS Video Quality Monitoring Solution

- Scalable, Centralized and Cost-effective Solution Helps Optimize Bandwidth
Utilization and Maximize Video Quality -
LAS VEGAS--(Business Wire)--
Harmonic Inc. (NASDAQ:HLIT) today introduced IRIS video quality (VQ) monitoring
and optimization software, a new solution suite designed to help video service
providers increase the quality of service (QoS), reliability and availability of
their broadcast services. IRIS gives operators the tools to maximize video
quality in real-time for the entire program lineup, offering end users a better
viewing experience. The information provided by IRIS allows service providers to
optimize bandwidth utilization by more effectively balancing the distribution of
channels across their multiplexes.

IRIS delivers a variety of real-time QoS measurements or scheduled reports for
hundreds of programs. For instance, operators can check status of video quality,
global channel availability, statmux pool optimization scores, and source
quality and complexity. IRIS can be utilized in conjunction with Harmonic`s
DiviCom Electra encoders, ProStream 1000 stream processing platform and NMX
Digital Service Manager to provide a cost-effective and centrally managed
solution for QoS monitoring.

"Operators need to easily and inexpensively fine-tune their video compression
stream processing systems," said Marios Stylianou, Product Marketing Manager at
Harmonic Inc. "Our IRIS software suite delivers the tools necessary to help
produce the best video quality. Headend managers can receive a pre-scheduled
report giving them a full view of their system`s QoS, helping to ensure high
availability. With IRIS, service providers gain a range of benefits including
lower churn and increased revenue per user."

IRIS is available in Foundation, Standard and Enterprise editions. The
Foundation edition supports 100 programs, while the Standard edition supports
250 programs and offers advanced functionality. The Enterprise edition supports
up to 500 programs and offers the most comprehensive set of tools and reports
available.

Harmonic will debut the new IRIS solution at NAB2009 in Las Vegas, April 20-23
in booth #SU7209. First customer shipments are scheduled for June 2009.

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 scheduling of the
first customer shipments for June 2009.

Our expectations and beliefs regarding these matters and the benefits expected
from the IRIS video quality monitoring solution 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.

Harmonic
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

Copyright Business Wire 2009