Press Release

Harmonic Announces Third Quarter Reporting Date

October 14, 2004

SUNNYVALE, Calif., Oct 14, 2004 (BUSINESS WIRE) -- Harmonic Inc. (Nasdaq:HLIT) today announced that it plans to report its third quarter 2004 results after market close on October 21, 2004.

Harmonic will also host a conference call to discuss its financial results at 2:00 P.M. Pacific (5:00 P.M. Eastern) on October 21, 2004. A listen-only broadcast of the conference call can be accessed on the Company's website at www.harmonicinc.com or by calling 415-908-4707 (Reservation No. 21180560). The replay will be available after 5:00 P.M. on October 21 at the same website address or by calling 402-977-9140 (Reservation No. 21180560).

Harmonic intends to discuss financial and other statistical information on this conference call. This information will also be available on the Company's website at www.harmonicinc.com either in the press release related to the above broadcast, by accessing the listen-only broadcast described above or by accessing the replay of the broadcast described above.

The Company has previously reported preliminary revenue and earnings in a press release dated October 11, 2004.

About Harmonic Inc.

Harmonic is a leading provider of innovative broadband solutions that deliver video, voice and data to communications providers around the world. Harmonic's technically advanced fiber optic, digital video and IP data delivery systems enable network operators to provide a range of interactive and advanced digital services that include high-speed Internet access, telephony, digital video, HDTV, video and audio streaming, and video-on-demand.

Harmonic is headquartered in Sunnyvale, California with R&D, sales, and system integration centers worldwide. The Company has customers in over 40 countries on six continents, including many of the world's largest communications providers. For more information, visit www.harmonicinc.com.

SOURCE: Harmonic Inc.

Harmonic Inc.
Robin N. Dickson, 408-542-2500
or
StreetConnect
Michael Newman, 408-542-2760