Silicon Image Appoints Industry Veteran Richard L. Sanquini to Board

SUNNYVALE, Calif., April 12, 2005 — Silicon Image, Inc. (Nasdaq: SIMG), a leader in multi-gigabit semiconductor solutions for the secure transmission and storage of rich digital media, today announced the appointment of Richard L. Sanquini to the company's board of directors. A semiconductor industry veteran, Sanquini is currently chairman of the board at PortalPlayer, an industry leader in personal media player solutions. His accomplished career is anchored by 20 years at National Semiconductor, where he managed key business units, including microprocessors and microcontrollers.

Commenting on the appointment, Steve Tirado, president and CEO of Silicon Image, stated, "We are pleased to have Dick join the Board. His strong executive management and IP licensing experience in the semiconductor industry will prove valuable as we broaden our role in secure digital content delivery and grow our licensing business. In addition, as we expand our global presence, we look forward to tapping his expertise gained through holding key executive management positions at two international joint ventures."

While at National Semiconductor from 1980 to 2000, Sanquini built the microprocessor and microcontroller business units from start-ups to businesses generating several hundred million dollars from 1980 to 1988. In the 1990s, he developed a unique intellectual property program that generated royalty income and produced more than 2000 patents, managed major businesses, directed corporate business development, and was the chairman of two China joint ventures. Prior to National Semiconductor, he was president and CEO of Information Storage Devices, and earlier, general manager and director of the memory and microprocessor businesses at RCA. Sanquini holds a bachelor's degree in electrical engineering from the Milwaukee School of Engineering in Wisconsin. He is currently a member of the board of Zilog, Synaptics, FyreStorm and LitePoint.

Sanquini noted, "With its core technology, strategic relationships and experience developing and driving industry standards, Silicon Image is uniquely positioned to capitalize on the growing volume of digital content and the resulting need to securely transmit and store it. I am looking forward to assisting the Company in helping define the personal digital environment of the future and achieve its strategic objectives."

About Silicon Image
Headquartered in Sunnyvale, Calif., Silicon Image, Inc. designs, develops and markets multi-gigabit semiconductor and system solutions for a variety of communications applications demanding high-bandwidth capability. With its proprietary Multi-layer Serial Link (MSL™) architecture, Silicon Image is well positioned for leadership in multiple mass markets including PCs, consumer electronics and storage. Currently, Silicon Image leads the global PC/display arena with its innovative digital interconnect technology, and has emerged as a leading player in the consumer electronics and storage markets by offering robust, high-bandwidth semiconductors. For more information on Silicon Image, visit www.siliconimage.com

Forward-looking Statements
This news release contains forward-looking information within the meaning of federal securities regulations. These forward-looking statements include statements related to the benefits of changes in Silicon Image's board composition. These forward-looking statements involve risks and uncertainties, including those described from time to time in Silicon Image's filings with the Securities and Exchange Commission (SEC), that could cause the actual results to differ materially from those anticipated by these forward-looking statements. In particular, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Factors Affecting Future Results" in the most recent Annual Report on Form 10-K filed by Silicon Image with the SEC. Silicon Image assumes no obligation to update this forward-looking information.

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