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HDMI transmitters use least power for mobile devices

Posted: 14 Nov 2007 ?? ?Print Version ?Bookmark and Share

Keywords:HDMI transmitters? mobile devices? HDCP?

The lowest-power consuming HDMI transmitters for mobile devices have been released by Silicon Image Inc. The SiI9022 and SiI9024 VastLane HDMI transmitters, deliver reduced power consumption, improving reliability and battery life in mobile devices.

The SiI9022 transmitter is specifically designed to bring HDMI capability to ever-smaller mobile devices such as digital cameras, portable media players, camcorders and mobile phones. The SiI9024 transmitter is intended for use in mobile devices designed to carry premium content and incorporates an integrated High-Bandwidth Digital Content Protection (HDCP) engine and keys that enable the secure distribution of content between HDMI enabled devices.

The SiI9022EBU and SiI9024EBU operate at 85MHz and can support resolutions of up to 720p and 1,080i. The SiI9022EBU6 and SiI9024EBU6 operate at 165 MHz and can support resolutions up to 1,080p and UXGA (1,600-1,200pixels). Consuming just 50mW for 720p/1,080i and 80mW for 1,080p, the SiI9022 and the SiI9024 are by far the lowest power consuming HDMI transmitters in the market.

These new transmitters help reduce system BOM costs with an integrated on-chip consumer electronics control function, a universal remote control feature typically implemented with the added cost of an external microcontroller. This feature provides consumers with added convenience, allowing them to use a single remote control to run multiple CEC-enabled HDMI devices.

Gains from lower power use
According to Stevan Eidson, director of marketing at Silicon Image, "Mobile devices are fast becoming the primary consumer electronics products for personal media. Silicon Image's newest transmitters empower OEMs with the ability to design HDMI-capable mobile devices with minimal battery power consumption and reduced CEC BOM cost. Today's consumer will now be able to share mobile content in high quality digital HD format that comes in the simplicity of a single HDMI connection. There is no other product on the market comparable to the efficiency and functionality of Silicon Image's latest HDMI transmitter offering."

Low power consumption enables improved battery life in mobile devices and allows dramatically longer HD video playback time when connected to HDTVs. By significantly reducing power consumption, these transmitters also increase reliability by reducing excessive heat. Customers that use the new transmitters will significantly reduce the amount of design effort needed to dissipate heat inside small, closed mobile devices.

Minimizing software

The SiI9024 HDMI transmitters are intended for use in portable media players and mobile phones that are designed to carry premium content and offer all the features of the SiI9022, but also include an integrated HDCP engine and keys. Having this dedicated hardware engine eliminates significant software complexity that usually accompanies HDCP implemented with a separate microcontroller. By moving much of the HDCP authentication from software to hardware, the SiI9024 increases the robustness of HDCP implementations by eliminating timing-critical events from software. The integrated HDCP keys also remove external EEPROM costs which would otherwise be passed on to consumers.

Customers already using the existing SiI9020 will enjoy seamless integration, as the software for the SiI9022 and SiI9024 are fully compatible with their predecessor. This will allow customers to migrate their designs to accommodate the new transmitters and provide fast time to market; thereby providing immediate access to the benefits of lower power, reduced costs and more robust CEC and HDCP implementations.

- Dennis Barker

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