Reference Design

CSR offers DSP reference design for dual-mic noise cancellation for Bluetooth headsets

BlueVox DSP is a low cost $6 eBOM Bluetooth mono headset design with enhanced echo and noise cancellation. Features coprocessor and CSR’s low power voice CODEC for high quality voice calls.

Source: CSR
3/4/2008

BlueVox DSP is a mono headset design with enhanced DSP-based Clear Voice Capture (CVC) echo and noise cancellation technology and first ROM-based design with an integrated DSP coprocessor and features AuriStream, CSR’s low power voice CODEC for superior quality voice calls. BlueVox DSP offers far superior audio performance and lower power consumption through its advanced DSP architecture and CVC noise cancellation, while maintaining a low $6 eBOM, previously only achieved for basic low cost mono headset designs.

The reference design includes all necessary hardware and software components, including CSR’s proprietary CVC software. By incorporating AuriStream, CSR enables fixed line quality connection and up to a 30% reduction in power consumption as compared with standard Bluetooth voice transmission methods.

Based on CSR's proven BlueCore5-Multimedia platform, BlueVox DSP provides the industry’s lowest cost and highest performance figures. BlueCore5-Multimedia features a best in class audio CODEC with a signal to noise ratio of -95 dB. The radio transmits at +8 dBm and receives at -90 dBm, which eliminates any interference and enhances range when taking a call.

BlueVox DSP supports v2.1+EDR of the Bluetooth specification, offering significant enhancements to the end user experience for secure and simple pairing between devices. This solution also includes support for multiple connections, allowing a user to take calls from two mobile phones or a mobile phone and a VoIP dongle through a simple user interface.

The BlueVox DSP features a small 4 layer PCB reference design and is available in both 8x8 mm QFN and compact 7x7 mm BGA package options. The 7x7 mm BGA package option allows easy migration from BlueCore5-Multimedia Flash, for designers wishing to further reduce cost for their high-end mono headset designs. CSR’s BlueVox DSP is available now.