Exhibit 99.1

Media Contact:
Dawn Goldstein
e-mail: dawn.goldstein@interdigital.com
Investor Contact:
Janet Point
e-mail: janet.point@interdigital.com
(610) 878-7800


FOR IMMEDIATE RELEASE


     INTERDIGITAL'S BOARD AUTHORIZES BUYBACK OF UP TO ONE MILLION SHARES OF
                                  COMMON STOCK


     King of Prussia, PA, October 25, 2004 . . . InterDigital Communications
Corporation (Nasdaq: IDCC), a leading architect, designer and provider of
wireless technology and product platforms, today announced that its Board of
Directors approved the repurchase of up to one million shares of the Company's
outstanding Common Stock. The shares may be repurchased from time-to-time
through open-market purchases or prearranged trading plans. The amount and
timing of purchases will be based on a variety of factors, including potential
stock acquisition price, cash requirements, acquisition opportunities, strategic
investments and other market and economic factors.

     "The Board of Directors' authorization to repurchase additional shares
reflects confidence in our future and our prospects for continued growth," said
Howard Goldberg, President and Chief Executive Officer. "Additions of new patent
license agreements and receipt of recurring royalty payments associated with the
solid performance of our licensees worldwide have substantially strengthened
InterDigital's cash position. Our strong financial foundation supports both the
pursuit of a range of technology and product investments and the ability to
engage in share repurchase programs at attractive prices."

     About InterDigital

     InterDigital architects, designs and provides advanced wireless
technologies and products that drive voice and data communications. The Company
offers technology and product solutions for mainstream wireless applications
that deliver cost and time-to-market advantages for its customers. InterDigital
has a strong portfolio of patented technologies covering 2G, 2.5G, 3G and 802
standards, which it licenses worldwide. For more information, please visit
InterDigital's web site: www.interdigital.com. InterDigital is a registered
trademark of InterDigital Communications Corporation.

     This press release contains forward-looking statements as to the Company's
beliefs, plans, and expectations with respect to our share repurchase program.
Forward-looking statements are subject to risks and uncertainties and actual
outcomes could differ materially from those expressed in any such
forward-looking statements due to a variety of factors including fluctuations in
the price of our Commons Stock, our cash requirements, and other market and
economic factors, relating to the share repurchase program. We undertake no duty
to publicly update any forward-looking statements, whether as a result of new
information, future events or otherwise.