Press Release

Harmonic Announces Tentative Agreement to Settle Shareholder Class Action

March 17, 2008

Litigation Settlement and Other Adjustments to Be Incorporated in

                              10-K Filing

SUNNYVALE, Calif.--(BUSINESS WIRE)--March 17, 2008--Harmonic Inc. (NASDAQ:HLIT), a leading provider of broadcast and on-demand video delivery solutions, today announced that it had reached a tentative agreement for the settlement of a securities class action filed against the Company and certain of its officers and directors in 2000. The Company believes that it is in its best interests to avoid the cost, management distraction and risk associated with a trial, currently scheduled for August 2008. The tentative agreement is subject to certain contingencies, including execution of a definitive agreement and court approval. The agreement will provide a full release of Harmonic and the other named defendants in connection with the allegations in the lawsuit without any admission of fault on the part of Harmonic or its officers and directors. The cost of the settlement is $15 million, plus an estimated aggregate of $1.4 million in related legal fees and expenses in connection with proceedings in the securities class action and derivative lawsuits. Of this aggregate cost of settlement, Harmonic will pay $6.4 million and the Company's insurance carriers, having funded most litigation costs to date, will contribute the remaining $10 million. As a result of this tentative agreement, the Company will record a charge of $6.4 million in its financial statements for the year ended December 31, 2007 to be included in its Annual Report on Form 10-K to be filed with the SEC later today.

In addition, following the completion of year-end audit procedures, the Company has identified certain adjustments to its preliminary unaudited financial statements announced on January 29, 2008 for the quarter and year ended December 31, 2007. These adjustments result in the reduction of quarterly and annual revenue and net income by $984,000 and $253,000, respectively, and will also be included in the financial statements in the Annual Report on Form 10-K for 2007. The impact of the litigation settlement and these other adjustments will reduce the Company's reported diluted GAAP EPS for the quarter and year by $0.08 for both periods, but non-GAAP EPS reported on January 29 will remain unchanged.

Approximately $820,000 of the adjusted revenue and associated cost of sales of $413,000 are expected to be recognized in the first quarter of 2008. Revised unaudited financial statements, which include the litigation settlement charge and related expenses, the effect of the year-end adjustments and a revised GAAP to non-GAAP reconciliation, are attached at the end of this release.

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 video services, including high definition, video-on-demand, network personal video recording and time-shifted TV. Cable, satellite, broadcast and telecom service providers can utilize Harmonic's digital video, broadband optical access and software solutions to offer consumers a compelling and personalized viewing 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.

Legal Notice Regarding Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, including statements related to: our expectations regarding the settlement of the securities class action litigation, including our expectation that a final settlement agreement will be executed by the parties and approved by the court; our belief that the final settlement agreement will provide a full release of Harmonic and the other named defendants in connection with the allegations in the securities class action lawsuit without any admission of fault on the part of Harmonic or its officers and directors; and our expectation that the aggregate fees and expenses in connection with proceedings in the securities class action and derivative lawsuits will be approximately $1.4 million. Our expectations and beliefs regarding these matters may not materialize, and actual results in future periods are subject to risks and uncertainties that could cause actual results to differ materially from those projected. These risks include the possibility that: we will not be able to reach a definitive settlement agreement with the plaintiffs in the securities class action litigation, or that any such settlement agreement that is reached with the plaintiffs will be rejected by the court; the definitive settlement agreement will not be on the same terms that were reached in the tentative settlement; and that the aggregate fees and expenses in connection with proceedings in the securities class action and derivative lawsuits will exceed $1.4 million. 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 our annual report filed on Form 10-K for the year ended December 31, 2006, our quarterly report on Form 10-Q for the quarterly period ended September 28, 2007, and our annual report on Form 10-K for the year ended December 31, 2007 that is expected to be filed on March 17, 2008. 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 Inc.
                Condensed Consolidated Balance Sheets
                             (Unaudited)

                                          December 31,  December 31,
                                               2007          2006
                                          ------------- --------------
                                                (In thousands)
Assets
Current assets:
  Cash and cash equivalents               $    129,005   $     33,454
  Short-term investments                       140,255         58,917
  Accounts receivable, net                      69,302         64,674
  Inventories                                   34,251         42,116
  Deferred income taxes                          3,506             --
  Prepaid expenses and other current
   assets                                       17,489         12,807
                                          ------------- --------------

    Total current assets                       393,808        211,968

Property and equipment, net                     14,082         14,816

Intangibles and other assets                    67,889         55,178
                                          ------------- --------------

                                          $    475,779   $    281,962
                                          ============= ==============

Liabilities and stockholders' equity
Current liabilities:
  Current portion of long-term debt       $         --   $        460
  Accounts payable                              20,500         33,863
  Income taxes payable                             481          7,098
  Deferred revenue                              37,865         29,052
  Accrued liabilities                           51,686         44,097
                                          ------------- --------------

    Total current liabilities                  110,532        114,570

Accrued excess facilities costs,
 noncurrent                                      9,907         16,434
Other non-current liabilities                   20,927          5,824
                                          ------------- --------------

  Total liabilities                            141,366        136,828
                                          ------------- --------------

Stockholders' equity:
  Common stock                               2,246,969      2,078,941
  Accumulated deficit                       (1,912,386)    (1,933,708)
  Accumulated other comprehensive loss            (170)           (99)
                                          ------------- --------------

    Total stockholders' equity                 334,413        145,134
                                          ------------- --------------

                                          $    475,779   $    281,962
                                          ============= ==============

                            Harmonic Inc.
           Condensed Consolidated Statements of Operations
                             (Unaudited)

                            Three Months Ended       Year Ended
                            ------------------- ----------------------
                            December  December  December   December
                             31, 2007  31, 2006  31, 2007   31, 2006
                            ------------------------------------------
                              (In thousands, except per share data)
Net sales                   $  87,390 $  75,338 $  311,204 $  247,684

Cost of sales                  46,675    45,174    177,129    146,238
                            --------- --------- ---------- -----------

Gross profit                   40,715    30,164    134,075    101,446
                            --------- --------- ---------- -----------

Operating expenses:
  Research and development     11,287     9,901     42,902     39,455
  Selling, general and
   administrative              24,332    16,621     70,690     65,243
  Write-off of acquired in-
   process technology              --        --        700         --
  Amortization of
   intangibles                    160       291        525        470
                            --------- --------- ---------- -----------

    Total operating
     expenses                  35,779    26,813    114,817    105,168
                            --------- --------- ---------- -----------

Income (loss) from
 operations                     4,936     3,351     19,258     (3,722)

Interest and other income,
 net                            2,997     1,816      6,263      5,338
                            --------- --------- ---------- -----------

Income before income taxes      7,933     5,167     25,521      1,616

Provision for income taxes      1,294       126      2,100        609
                            --------- --------- ---------- -----------

Net income                  $   6,639 $   5,041 $   23,421 $    1,007
                            ========= ========= ========== ===========

Net income per share
  Basic                     $    0.08 $    0.07 $     0.29 $     0.01
                            ========= ========= ========== ===========

  Diluted                   $    0.07 $    0.07 $     0.28 $     0.01
                            ========= ========= ========== ===========

Shares used to compute net
 income per share:
  Basic                        88,469    75,670     81,882     74,639
                            ========= ========= ========== ===========

  Diluted                      90,377    76,547     83,249     75,183
                            ========= ========= ========== ===========

                            Harmonic Inc.
           Condensed Consolidated Statements of Cash Flows
                             (Unaudited)

                                                      Year Ended
                                                ----------------------
                                                 December   December
                                                  31, 2007   31, 2006
                                                ----------- ----------
                                                    (In thousands)
Cash flows from operating activities:
  Net income                                    $   23,421  $   1,007
  Adjustments to reconcile net income to cash
   provided by operating activities:
   Amortization of intangibles                       5,338      2,200
   Write-off of acquired in-process technology         700         --
   Depreciation                                      6,661      7,383
   Stock-based compensation                          6,196      5,722
   Loss on disposal and impairment of fixed
    assets                                              74        297
   Deferred income taxes                                --         --
Changes in assets and liabilities:
   Accounts receivable                              (4,191)   (20,550)
   Inventories                                       7,865     (3,224)
   Prepaid expenses and other assets                (6,354)    (4,316)
   Accounts payable                                (13,129)    13,396
   Deferred revenue                                 10,205      7,774
   Income taxes payable                                208        493
   Accrued excess facilities costs                  (6,684)      (877)
   Accrued and other liabilities                     5,050       (671)
                                                ----------- ----------
     Net cash provided by operating activities      35,360      8,634
                                                ----------- ----------

Cash flows from investing activities:
   Purchases of investments                       (178,123)   (70,398)
   Proceeds from sale of investments                98,300     84,820
   Acquisition of property and equipment, net       (5,868)    (5,143)
   Acquisition of Rhozet, net of cash received      (1,950)        --
   Purchase of Entone, Inc. note receivable         (2,500)        --
   Acquisition of Entone Technologies, Inc.,
    net of cash received                            (2,465)   (26,232)
                                                ----------- ----------
     Net cash used in investing activities         (92,606)   (16,953)
                                                ----------- ----------

Cash flows from financing activities:
   Proceeds from issuance of common stock, net     153,337      4,778
   Excess tax benefits from stock-based
    compensation                                        70         --
   Repayments under bank line and term loan           (460)      (812)
   Repayments of capital lease obligations             (72)       (82)
                                                ----------- ----------
     Net cash provided by financing activities     152,875      3,884
                                                ----------- ----------

Effect of exchange rate changes on cash and
 cash equivalents                                      (78)       (71)
                                                ----------- ----------

Net increase (decrease) in cash and cash
 equivalents                                        95,551     (4,364)
Cash and cash equivalents at beginning of
 period                                             33,454     37,818
                                                ----------- ----------

Cash and cash equivalents at end of period      $  129,005  $  33,454
                                                =========== ==========

                            Harmonic Inc.
                         Revenue Information
                             (Unaudited)

                    Three Months Ended             Year Ended
                 ------------------------- ---------------------------
                 December 31, December 31, December 31,  December 31,
                     2007         2006         2007          2006
                 -----------------------------------------------------
                                    (In thousands)
Product
Video Processing $41,954  48% $30,492  41% $134,744  43% $ 96,855  39%
Edge & Access     29,379  34%  32,500  43%  125,270  40%  109,529  44%
Software,
 Services and
 Other            16,057  18%  12,346  16%   51,190  17%   41,300  17%
                 ------------ ------------ ------------- -------------
    Total        $87,390 100% $75,338 100% $311,204 100% $247,684 100%
                 =======      =======      ========      ========

Geography
United States    $49,810  57% $44,449  59% $175,257  56% $126,420  51%
International     37,580  43%  30,889  41%  135,947  44%  121,264  49%
                 ------------ ------------ ------------- -------------
    Total        $87,390 100% $75,338 100% $311,204 100% $247,684 100%
                 =======      =======      ========      ========

Market
Cable            $46,493  53% $53,236  71% $185,803  60% $155,736  63%
Satellite         21,637  25%   8,405  11%   65,343  21%   26,189  11%
Telco & Other     19,260  22%  13,697  18%   60,058  19%   65,759  26%
                 ------------ ------------ ------------- -------------
    Total        $87,390 100% $75,338 100% $311,204 100% $247,684 100%
                 =======      =======      ========      ========

Use of Non-GAAP Financial Measures

In establishing operating budgets, managing its business performance, and setting internal measurement targets, the Company excludes a number of items required by GAAP. Management believes that these accounting charges and credits, most of which are non-cash or non-recurring in nature, are not useful in managing its operations and business. Historically, the Company has also publicly presented these supplemental non-GAAP measures in order to assist the investment community to see the Company "through the eyes of management," and thereby enhance understanding of its operating performance. The non-GAAP measures presented here are gross margins, operating expense, net income and net income per share. The presentation of non-GAAP information is not intended to be considered in isolation or as a substitute for results prepared in accordance with GAAP and is not necessarily comparable to non-GAAP results published by other companies. A reconciliation of non-GAAP financial measures to GAAP financial measures is included with the financial statements contained in this press release. The non-GAAP adjustments described below have historically been excluded from our non-GAAP measures. These adjustments, and the basis for excluding them, are:

 -- Restructuring Activities

     -- Severance Costs
         The Company has incurred severance costs in cost of sales and
          in operating expenses in connection with the closing of its
          manufacturing and research and development facilities in the
          UK. In addition, severance costs were incurred due to a
          reorganization of its senior management following the
          appointment of a new Chief Executive Officer. The Company
          excludes one-time costs of this nature in evaluating its
          ongoing operational performance. We believe that these costs
          do not reflect expected future expenses nor do they provide
          a meaningful comparison of current versus prior operating
          results.

     -- Excess Facilities
          The Company has incurred excess facilities charges and
           credits in operating expenses due to adjustments related to
           vacating and subleasing portions of its Sunnyvale campus
           and to the closing of its manufacturing and research and
           development facilities in the UK. The Company excludes one-
           time costs of this nature in evaluating its ongoing
           operational performance. We believe that these costs do not
           reflect expected future expenses nor do they provide a
           meaningful comparison of current versus prior operating
           results.

     -- Product Discontinuance
          In connection with the restructuring of its operations in
           the UK, the Company recorded charges for excess inventory
           in connection with discontinued products. The Company
           excludes one-time costs of this nature in evaluating its
           ongoing operational performance. We believe that these
           costs do not reflect expected future expenses nor do they
           provide a meaningful comparison of current versus prior
           operating results.

 --Litigation Settlement Costs

   The Company incurred a litigation settlement charge and related
    expenses in 2007. We exclude one-time costs of this nature in
    evaluating our operating performance as it is difficult to
    estimate the amount or timing of these items in advance.
    Generally, in the case of legal settlements, these gains or losses
    are recorded in the period in which the matter is concluded or
    resolved even though the subject matter in this instance related
    to litigation originally initiated in 2000. We believe that these
    costs do not reflect future expenses nor do they provide a
    meaningful comparison of current versus prior operating results.

 -- Non-Cash Items

     -- Stock-Based Compensation Expense
          The Company has incurred stock-based compensation expense in
           cost of sales and operating expenses as required under FAS
           123R. The Company excludes stock-based compensation expense
           because it believes that this measure is not relevant in
           evaluating its core operating performance, either for
           internal measurement purposes or for period-to-period
           comparisons and benchmarking against other public
           companies.

     -- Impairment and Amortization of Intangibles
          The Company has incurred amortization of intangibles and has
           taken a charge for acquired in-process technology related
           to acquisitions the Company has made. In addition, the
           Company recorded an impairment of its fixed assets and
           intangibles due to its decision to discontinue a product
           line. Management excludes these items when it evaluates its
           core operating performance. We believe that eliminating
           these expenses is useful to investors when comparing
           historical and prospective results and comparing such
           results to other public companies because these expenses
           will vary if and when the Company makes additional
           acquisitions.

                            Harmonic Inc.
                GAAP to Non-GAAP Income Reconciliation
                             (Unaudited)

                     Three Months Ended         Three Months Ended
                      December 31, 2007          December 31, 2006
                  -------------------------- -------------------------
                   Gross   Operating Net      Gross   Operating Net
                   Margin   Expense  Income   Margin   Expense  Income
                  ----------------------------------------------------
                                     (In thousands)
GAAP              $ 40,715 $ 35,779 $ 6,639  $ 30,164 $ 26,813 $ 5,041

Cost of sales
 related to
 severance costs                                  287              287
Cost of sales
 related to
 product
 discontinuance                                 1,134            1,134
Cost sales related
 to stock based
 compensation
 expense               280              280       202              202
Research and
 development
 expense related
 to stock based
 compensation
 expense                       (573)    573               (334)    334
Selling, general
 and
 administrative
 expense related
 to severance
 costs                                                    (198)    198
Selling, general
 and
 administrative
 expense related
 to excess
 facilities costs              (482)    482               (116)    116
Selling, general
 and
 administrative
 expense related
 to stock based
 compensation
 expense                       (868)    868               (810)    810
Selling, general
 and
 administrative
 expense related
 to litigation
 settlement                  (6,400)  6,400
Impairment and
 amortization of
 fixed assets and
 intangibles         1,474     (160)  1,634     1,237     (491)  1,728

                  -------------------------- -------------------------
Non-GAAP          $ 42,469 $ 27,296 $16,876  $ 33,024 $ 24,864 $ 9,850
                  ========================== =========================

GAAP income per
 share - basic                      $  0.08                    $  0.07
                                    ========                   =======
GAAP income per
 share - diluted                    $  0.07                    $  0.07
                                    ========                   =======
Non-GAAP income
 per share - basic                  $  0.19                    $  0.13
                                    ========                   =======
Non-GAAP income
 per share -
 diluted                            $  0.19                    $  0.13
                                    ========                   =======
Shares used in
 per-share
 calculation -
 basic                               88,469                     75,670
                                    ========                   =======
Shares used in
 per-share
 calculation -
 diluted                             90,377                     76,547
                                    ========                   =======

                   Year Ended December 31,   Year Ended December 31,
                             2007                       2006
                  -------------------------- -------------------------
                   Gross   Operating  Net     Gross   Operating Net
                   Margin   Expense  Income   Margin   Expense  Income
                  ----------------------------------------------------

GAAP              $134,075 $114,817 $23,421  $101,446 $105,168 $ 1,007

Cost of sales
 related to
 severance costs       188              188       587              587
Cost of sales
 related to
 product
 discontinuance        772              772     1,134            1,134
Cost of sales
 related to stock
 based
 compensation
 expense               998              998       957              957
Research and
 development
 expense related
 to severance
 costs                         (334)    334                (12)     12
Research and
 development
 expense related
 to stock based
 compensation
 expense                     (2,012)  2,012             (1,638)  1,638
Selling, general
 and
 administrative
 expense related
 to severance
 costs                         (131)    131               (848)    848
Selling, general
 and
 administrative
 expense related
 to stock based
 compensation
 expense                     (3,186)  3,186             (3,124)  3,124
Selling, general
 and
 administrative
 expense related
 to excess
 facilities
 expense
 (recovery)                     331    (331)            (2,174)  2,174
Selling, general
 and
 administrative
 expense related
 to litigation
 settlement                  (6,400)  6,400
Impairment and
 amortization of
 fixed assets and
 intangibles         4,740   (1,225)  5,965     1,730     (670)  2,400

                  -------------------------- -------------------------
Non-GAAP          $140,773 $101,860 $43,076  $105,854 $ 96,702 $13,881
                  ========================== =========================

GAAP income per
 share - basic                      $  0.29                    $  0.01
                                    ========                   =======
GAAP income per
 share - diluted                    $  0.28                    $  0.01
                                    ========                   =======
Non-GAAP income
 per share - basic                  $  0.53                    $  0.19
                                    ========                   =======
Non-GAAP income
 per share -
 diluted                            $  0.52                    $  0.18
                                    ========                   =======
Shares used in
 per-share
 calculation -
 basic                               81,882                     74,639
                                    ========                   =======
Shares used in
 per-share
 calculation -
 diluted                             83,249                     75,183
                                    ========                   =======

    CONTACT: Harmonic Inc.
             Robin N. Dickson, 408-542-2500
             Chief Financial Officer
             or
             StreetConnect
             Michael Newman, 408-542-2760 (Investor Relations)

    SOURCE: Harmonic Inc.