Exhibit 99.1

  InterDigital's Board of Directors Increases Share Repurchase Program to $350
                                    Million

    KING OF PRUSSIA, Pa.--(BUSINESS WIRE)--Dec. 28, 2006--InterDigital
Communications Corporation (NASDAQ: IDCC) announced today that its
Board of Directors has approved the expansion of its current share
repurchase program from $200 million to $350 million. The Board based
the higher authorization amount upon strong positive cash flow
generated in 2006 as well as anticipated high levels of free cash flow
in 2007. Under the current $200 million repurchase program, the
company has repurchased 6.4 million shares for $187 million as of
December 27, 2006.

    "Our business continues to generate substantial free cash flow.
Indeed, in first quarter 2007, in addition to expected payments
related to current royalties, we anticipate receipt of either
scheduled license fee payments or new pre-payments totaling
approximately $120 million from existing patent licensees," commented
William J. Merritt, InterDigital's President and Chief Executive
Officer. "These high levels of free cash flow allow us to build
shareholder value in three ways: the advancement of our internal modem
product development in support of product launch targeted for the fall
of 2007, acquisitions of technology, and significant share
repurchases."

    "Since 2003, InterDigital has invested substantial amounts in
research and product development, funded complementary acquisitions of
patents and technologies and expended nearly $300 million repurchasing
approximately 11 million shares, or approximately 18% of diluted
shares. Our high level of share repurchases in recent years together
with this expansion of our current program reflects both our
confidence in our ability and our commitment to enhance shareholder
value," said Richard Fagan, InterDigital's Chief Financial Officer.
"In addition, we plan to initiate steps in 2007 to help reduce our
weighted average cost of capital and further enhance shareholder value
by introducing prudent levels of debt to our capital structure."

    Pursuant to the repurchase program, shares may be purchased from
time-to-time, through open market purchases, pre-arranged trading
plans or privately negotiated transactions. The amount and timing of
purchases will be based on a variety of factors, including potential
share repurchase price, cash requirements, acquisition opportunities,
strategic investments and other market and economic factors.

    About InterDigital

    InterDigital Communications Corporation designs, develops and
provides advanced wireless technologies and products that drive voice
and data communications. InterDigital is a leading contributor to the
global wireless standards and holds a strong portfolio of patented
technologies which it licenses to manufacturers of 2G, 2.5G, 3G and
802 products worldwide. Additionally, the company offers baseband
product solutions and protocol software for 3G multimode terminals and
converged devices. InterDigital's differentiated technology and
product solutions deliver time-to-market, performance and cost
benefits. For more information, please visit InterDigital's web site:
www.interdigital.com.

    This press release contains forward-looking statements regarding
our current beliefs and expectations as to: levels of free cash flow
in 2007, payments related to current royalties and receipt of either
scheduled license fee payments or new pre-payments, our ability to
build shareholder value, a fall 2007 product launch, and our plans to
reduce our average cost of capital. Forward-looking statements are
subject to risks and uncertainties. Actual outcomes could differ
materially from those expressed in or anticipated by such
forward-looking statements due to a variety of factors including, but
not limited to, delays in the receipt of expected payments from our
licensees, our ability to enter into new license agreements, the
market price of shares of the company's common stock, other unexpected
business demands for cash, acquisitions and other strategic investment
opportunities, general market and economic conditions, unexpected
delays in our product development program, and the ability to obtain
debt on favorable terms.

    InterDigital is a registered trademark of InterDigital
Communications Corporation.

    CONTACT: InterDigital Communications Corporation
             Media:
             Jack Indekeu, +1 610-878-7800
             jack.indekeu@interdigital.com
             or
             Investors:
             Janet Point, +1 610-878-7800
             janet.point@interdigital.com