Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated February 27, 2009 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in Harmonic Inc.’s Annual Report on Form 10-K for the year ended December 31, 2008.

/s/ PricewaterhouseCoopers LLP  

PricewaterhouseCoopers LLP 

San Jose, California 
June 10, 2009