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Sigma Designs to Showcase Advanced Video and Networking Technologies at the NCTA Cable Show

First Public Demonstration of Sigma's 3DTV Technology

Milpitas, Calif - May 10, 2010

Sigma Designs (Nasdaq: SIGM), a leading provider of system-on-chip (SoC) solutions used to deliver entertainment and control throughout the home, announced it will demonstrate four of its leading technologies at The Cable Show, which runs from May 11 - 13, 2010, at the Los Angeles Convention Center in Los Angeles, CA. The Cable Show, which is hosted by the National Cable & Telecommunication Association (NCTA), features the most up-to-date thoughts about content delivery, consumer behavior, and technology breakthroughs for the cable industry.

Members of the press and analyst community are invited to visit the Sigma Designs booth #648, where they will learn about how:

• Sigma's 8652-based thin clients can convert consumer premises equipment to a cable TV gateway, meeting performance requirements at unprecedented price points
• High-quality 3D video processing on Sigma Designs set-top box solutions enhance user experiences
• Sigma's HomePlug AV solution enables cable service providers to deliver content to more rooms with higher reliability at a lower cost and improves the performance and reliability of home networks
• Sigma's Z-Wave solution enables service providers to increase ARPU and net profits by delivering compelling new services such as home control, security, energy management and more

Executive Quotes:

Michael Weissman, Vice President Corporate Marketing, Sigma Designs

"The Cable Show has always been an important venue for putting innovation in front of global cable-market leaders. With solutions that touch so many parts of the content-delivery chain, from media processors for IP-based set-top boxes to the latest developments in energy management and home networking, Sigma Designs is proud to be a dominant enabler of innovation in today's cable industry."

Highlights / Key Facts:

• Cable operators have traditionally required an expensive cable set-top box at every TV inside the home. With Sigma's breakthrough thin client architecture, deployment costs can be substantially reduced while still delivering superior video playback quality - all over IP.
• Sigma is a leading media-processor supplier for high-definition IPTV set-top boxes. Sigma's media processors power sophisticated on-screen guides and advanced features such as DVR, VoD, fast channel change, simultaneous multi-channel viewing, media-content streaming and sharing.
• The Sigma/CopperGate HomePlug AV CG2110 Chipset gives service providers and CPE equipment manufacturers a cost-effective, reliable, and easy method for the distribution of HD media content, triple-play services and IPTV over a home's electric power lines.
• Sigma's industry-standard Z-Wave solutions transform stand-alone devices into intelligent network nodes that can be controlled and monitored wirelessly. Applications for Z-Wave intelligence include home entertainment systems, lighting and appliance control, HVAC systems, security and access control, meter reading, and digital home health care.

About Sigma:

Sigma Designs is a leading fabless semiconductor provider of highly integrated system-on-chip (SoC) solutions that are used to deliver entertainment and control throughout the home. SoC solutions include media processing, wired and wireless networking, video image processing, and home control along with system software to form the critical components of consumer electronic products that include Internet protocol TV (IPTV) set-top boxes and gateways, Blu-ray players, high definition televisions (HDTV), and media communication devices. Headquartered in Milpitas, Calif., Sigma Designs has direct sales representatives in the United States, Brazil, China, Europe, Israel, Japan, Taiwan and distributors in Singapore, Korea, Russia and India. For more information, please visit Sigma Designs' web site at www.sigmadesigns.com

Safe Harbor Statement

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 about the anticipated features and benefits of Sigma's products, growing demand from consumers, projected timing and availability of solutions, and the expected use of Sigma's products. Actual results could vary materially from those projected in any forward-looking statements included herein as a result of various factors, including, but not limited to, worldwide economic conditions, the rate of growth of the market, changes in the customer's ability or desire to incorporate Sigma's chipsets and software into its product, consumer reaction to the new products and services being offered, the ability of Sigma to deliver sufficient quantity and quality of its chipsets, alternative offerings by competitors, and the ability of the parties to work together successfully to achieve the rollout of this new product. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Sigma undertakes no obligation to publicly release or otherwise disclose the result of any revision to these forward-looking statements that may be made as a result of events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

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