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ROM-based Bluetooth embraces DSP

Posted: 18 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Bluetooth? ROM BlueTunes? DSP?

The BlueTunes ROM says CST is the world's first ROM-based Bluetooth solution for stereo headsets with an integrated DSP. According to the company, the new solution is designed to provide end users with the ability to seamlessly switch between wireless music playback and voice calls. BlueTunes ROM is a low-power design, and is the most cost-effective, high-quality Bluetooth music solution available on the market today for stereo headsets and wireless speaker products, claims CSR.

BlueTunes ROM is based on BlueCore5-Multimedia. Its flexible DSP architecture also allows designers to add additional features to differentiate their end products. BlueTunes ROM supports both SBC and MP3 (licence required) decoding for improved audio quality on music playback, together with a configurable 5 band EQ to improve the end-user experience. The low power design of BlueTunes ROM enables over 10hrs of music playback from a 180mAh battery.

In addition, BlueTunes ROM integrates FastStream, a low latency high-quality music and voice codec which significantly reduces the latency of the audio link to avoid "lip-sync" issues. According to CSR, this is particularly useful when watching video images and listening to audio on a headset or speakers.

Apart from music playback, the BlueTunes ROM enables high-end Bluetooth voice headset capabilities when on a call. BlueTunes ROM includes CSR's proprietary Clear Voice Capture (CVC) technology that supports both single and dual microphone solutions. Alongside CVC an acoustic echo canceller eliminates echo and background noise to further enhance the end user experience. BlueTunes ROM also features CSR's proprietary AuriStream Voice codec. BlueTunes ROM is fully compliant with Bluetooth v2.1+EDR and supports secure simple pairing.

CSR is also providing a BlueTunes ROM development kit complete with a development board, example reference designs, an audio adaptor and a Music Voice (MV) dongle. In addition, the development kit also features a configuration tool for tuning the audio performance for voice calls and listening to music.

CSR's BlueTunes ROM silicon and development kits are sampling now and start shipping in December.

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