BURNABY, B.C., CANADA and HERNDON, VA - June 20, 2006 - Spectrum Signal Processing Inc. and Objective Interface Systems, Inc. today announced they have entered into an agreement to integrate and market Objective Interface’s ORBexpress® RT with Spectrum’s flexComm™ SDR-4000 software defined radio (SDR) signal processing platform.

ORBexpress RT is a real-time CORBA Object Request Broker (ORB) that enables software developers to simplify the development of distributed software applications, build scalable, efficient and robust applications, and reduce overall development time, meeting time-to-market requirements. The SDR-4000 is Spectrum’s new, ruggedized commercial-off-the-shelf software defined radio platfrom that supports the Software Communications Architecture (SCA).

“ORBexpress RT is fast, lean and predictable, making it ideal for use with the SDR-4000 to support digitization and processing of complex waveforms requiring low-latency deterministic operation,” said Mark Briggs, Vice President, Marketing at Spectrum Signal Processing. “Furthermore, ORBexpress is free of a run-time license, thereby minimizing its cost when used in volume deployments. The size, weight, power and performance attributes of the SDR-4000 integrated with ORBexpress make it ideally suited for volume mobile radio applications.”

“By integrating one of the most widely adopted ORBs in the defense and military space with an industry-leading signal processing platform, Objective Interface and Spectrum can provide integrated software defined radio solutions that simplify our customers’ supply chains,” said Joseph Jacob, Senior Vice President, Sales and Marketing at Objective Interface Systems. “Our solution can reduce our customers’ time-to-deployment and mitigate the time, risk and expense of in-house development.”

The SCA, developed by the United States Department of Defense for its Joint Tactical Radio System program, specifies how hardware and software elements of a radio interact to support software defined radio functionality. A key component of the SCA is the requirement to use CORBA as a middleware layer for the application framework and waveform application components operating on general-purpose processors. ORBexpress RT provides critical real-time CORBA capabilities to support deterministic systems where speed, predictability and reliability are important. It provides a minimal footprint, low latency and low overhead to allow software defined radio developers to build scalable, efficient and robust applications.

Spectrum’s SDR-4000 3U CompactPCI®-based rugged platform uses heterogeneous processing to provide high-performance, real-time signal processing for tactical military radios. The platform includes the PRO-4600 software defined radio modem processing engine and the XMC-3321 dual-transceiver input/output mezzanine card. The SDR-4000 also includes Spectrum’s quicComm™ hardware abstraction layer and software development library.

Details on the SDR-4000 can be found at www.spectrumsignal.com/products.

About Objective Interface Systems, Inc .
Objective Interface is the worldwide leader of high-performance, real-time and embedded communications middleware solutions. The company provides CORBA ORBs, publish-subscribe technology based on the Object Management Group (OMG) Data Distribution Service standard (DDS), and secure communications middleware development tools based on the Multiple Independent Levels of Security/Safety (MILS) architecture to meet the high-performance requirements of military and aerospace, telecommunications, data communications, industrial automation and process control, transportation and consumer electronics markets. Objective Interface products are the communications core of many mission-critical products and systems including mission-critical avionics systems, network management, vehicle control and management systems, software defined radio, telecommunication systems, process control systems and nuclear fusion ignition facilities. Objective Interface customers consist of the world's most advanced product and engineering organizations including Boeing, BAE Systems, British Aerospace, CERN, Daimler-Benz, EADS, Ericsson, Eurocontrol, General Dynamics, Harris, Hughes Network Systems, ITT, Kawasaki Heavy Industries, Lawrence Livermore National Labs, Lockheed Martin, Lucent, Nikon, Nortel, Northrop Grumman, Philips, Raytheon, Rockwell Collins, Rohde & Schwarz, Saab, Samsung, Sandia, Selex Communications, Spectrum Signal, Telefunken, Thales, TRW, the U.S. Department of Defense, ViaSat and many others. For more information, please visit: www.ois.com.

About Spectrum Signal Processing
Spectrum Signal Processing Inc. (NASDAQ: SSPI / TSX: SSY) is a leading supplier of software defined platforms for defense electronics applications. Spectrum's products and services are optimized for military communications, signals intelligence, surveillance, electronic warfare and satellite communications applications. Spectrum's integrated, application-ready products provide its customers with compelling time-to-market and performance advantages while mitigating program risk and cost parameters. Spectrum Signal Processing (USA) Inc., based in Columbia , MD , provides applications engineering services and modified commercial-off-the-shelf platforms to the US Government, its allies and its prime contractors. For more information on Spectrum and its flex Comm product line, please visit www.spectrumsignal.com.

Forward looking Safe Harbour Statement
This news release contains forward-looking statements related to sales of the Spectrum Signal Processing Inc. flexComm product line. These statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties, including the timely development and acceptance of Spectrum's new products, the impact of competitive products and pricing, availability of components, changing market conditions and the other risks detailed from time to time in other company filings. Actual results may differ materially from those projected. These forward-looking statements represent the company's judgment as of the date of this release and Spectrum may or may not update these forward-looking statements in the future. Readers are referred to Spectrum's assumptions and risk factors set out in the most current Form 20-F filed with the Securities and Exchange Commission and the British Columbia Securities Commission.

flex Comm and quic Comm are trademarks of Spectrum Signal Processing Inc. ORBexpress is a registered trademark of Objective Interface Systems, Inc. CompactPCI is a registered trademark of the PCI™ Industry Computers Manufacturer's Group. PCI is a trademark of the Peripheral Component Interconnect – Special Interest Group (PCI-SIG). Other product and company names mentioned may be trademarks and/or registered trademarks of their respective holders.

EDITORIAL CONTACTS:

Obejctive Interface Systems contacts

Spectrum contact