Cambridge, UK — CSR has launched BlueTunes ROM, which the company claims as the industry's first ROM-based Bluetooth development kit for stereo headsets with an integrated digital signal processor (DSP). This solution enables end users to seamlessly switch between wireless music playback and voice calls.
The BlueTunes ROM is based on CSR's BlueCore5-Multimedia Bluetooth chip, which provides high audio performance with an integrated stereo codec that provides 95 dB SNR (signal-to-noise ratio). Its flexible DSP architecture also allows designers to add additional features to differentiate their end products.
BlueTunes ROM supports both SBC (sub band codec) and MP3 (license required) decoding for improved audio quality on music playback, together with a configurable 5-band equalizer to improve the end user experience. The low power design enables over 10 hours of music playback from a 180 mAh 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, said CSR. Standard Bluetooth solutions have a latency of up to 200 ms, which restricts their use in real-time applications such as gaming, video or mobile TV.
It also enables high-end Bluetooth voice headset capabilities when on a call by incorporating CSR's proprietary Clear Voice Capture (CVC) technology that supports both single and dual microphone solutions. It also features an Acoustic Echo Canceller that eliminates echo and background noise, and CSR's proprietary AuriStream Voice codec.
The BlueTunes ROM is fully compliant with Bluetooth v2.1+EDR and supports secure simple pairing.
The BlueTunes ROM development kit includes a development board, example reference designs, an audio adaptor and a Music Voice (MV) dongle. The development kit also features a configuration tool for tuning the audio performance for voice calls and listening to music.
Pricing: The BlueTunes ROM development kit is priced at $500.
Availability: The development kit is available now; silicon will start shipping in December.
Product information: BlueTunes ROM
CSR, www.csr.com
