CSR, a stereo headset offering rich features
R109 drastically reduces development time
Software Development Kit Release


June 24, 2009 -- CSR announced today that it has released a new Software Development Kit (SDK) that enables manufacturers to develop stereo Bluetooth headset products with various functions in the shortest possible time.

CSR’s Stereo R109 SDK release provides the company’s innovative Proximity Pairing technology, Dual Microphone Clear Voice Capture (CVC) reverberation and noise cancellation technology, and DSP-based sound enhancement features to enable Bluetooth stereo headsets to decode and read music files directly from memory cards like portable media players, while delivering superior sound quality. This SDK product has further strengthened CSR’s leadership in the Bluetooth stereo headset market and significantly increased its contribution.

Based on CSR’s industry-leading BlueCore5-Multimedia silicon, the R109 SDK offers a variety of features, including reducing design time for manufacturers' stereo Bluetooth accessories and providing support for multiple codecs such as SBC, MP3, AAC, and AAC+. CSR’s stereo SDK not only provides 3D stereo separation, a 4-band equalizer, and dynamic range control to enhance users’ music listening experience, but also supports DSP-based listening enhancement features. In addition, this product provides excellent call quality using CSR's dual microphone CVC echo and noise cancellation technology.

The R109 SDK supports CSR's low-latency codec technology, FastStream. This technology reduces audio link latency during video playback, preventing audio lip-sync issues in headsets or speakers. While real-time applications using competitor Bluetooth solutions—such as gaming consoles, video players, or mobile TVs—are subject to significant limitations due to latency levels of approximately 200ms, CSR's FastStream technology offers significantly improved performance with a latency level of about 40ms.

CSR's R109 SDK also features its advanced AuriStream ADPCM codec, which provides the best sound quality during calls and reduces power consumption by up to 30%. CSR's latest SDK enables entirely new use scenarios for Bluetooth headset design by providing the ability to directly read and decode music files from a memory card, allowing users to use Bluetooth stereo headsets like portable media players.