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Ref design enables car cellphone hands-free kit

Posted: 07 Nov 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Texas Instruments? Lyrtech? TMS320C54HFK? Hands Free Kit? DSP?

Simplifying system design of hands-free cellular phone kits for automobiles, Texas Instruments Inc. (TI) and Lyrtech have announced the availability of a complete Hands Free Kit (HFK) Reference Design for use with the new TMS320C54HFK DSP.

According to the announcement, this complete small form factor reference design provides OEMs the necessary hardware and software for creating Bluetooth and audio streaming-enabled, high-quality cellphone HFK designs for the automobile aftermarket. The solution offers the flexibility to add proprietary or off-the-shelf algorithms to fit individual product needs. Featuring a TI DSP-based platform, the new reference design eliminates the need to further design any core hardware or car audio software modules, thus saving OEMs cost and up to nine months in development time.

Safety, sound quality
Spurred by bans on holding a cellular phone while driving, HFK technology is not only a growing necessity for drivers, but also for developers who need provide sound quality products that meet specific consumer expectations.

The TI HFK Reference Design is a full system solution including hardware, schematics and Gerber files, the company said, freeing customers from the burden of hardware and software development, part selection validation and testing.

The HFK Reference Design is based on TI's audio optimized TMS320C54x DSP, which promises designers an effective way of achieving the high-performance, low-power operation and low system cost suitable for audio specific applications.

The design leverages Acoustic Technologies' key software algorithms for echo cancellation, noise reduction and enhanced speech. Bluetooth technology from Adamya Computing Technologies is used to deliver Bluetooth communication software, allowing simultaneous audio and data streaming. This enables the use of the HFK Reference Design with any Bluetooth-enabled phone regardless of phone manufacturer. Bluetooth and audio streaming have removed the cradle, making it unnecessary to upgrade the kit for new or additional phones, the company said, thus simplifying systems and providing customers with more consistent use across products.

Customizable design
While the Bluetooth software, noise reduction and echo cancellation are standard, additional software is available to customize the design, such as phone book download functionality and speech recognition, to create quality user experience. A Bluetooth A2DP profile for audio streaming allows the driver to play MP3 music via the phone through the headset or car speakers and also lets them connect to a laptop PC or other Bluetooth-enabled audio systems. Another helpful feature includes automatic car stereo music muting when receiving incoming phone calls.

"The HFK Reference Design puts OEMs a step ahead in the development of cellular car kits," said John Dixon, worldwide low power DSP product marketing manager, Texas Instruments. "With proven technology from experienced DSP third parties, plus TI's leadership in the Hands Free Car Kit DSP market, OEMs can now quickly and easily build quality cellular phone HFKs for the auto aftermarket."

The HFK Reference Design is available for $495 through Lyrtech, with order entry beginning in December 2006.

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