CSR recently released a BlueVox2 mono headset solution that costs only $5. BlueVox2 features extremely low power consumption and zero cost noise reduction. CSR’s design features AuriStream for superior voice quality, simultaneous connection of multiple devices, and support for Bluetooth version 2.1+EDR. BlueVox2 also presents headset manufacturers with the opportunity to design the smallest Bluetooth headsets through an ultra small 4.5×5.5mm BGA package option. CSR is currently sampling BlueVox2, with first headsets expected to be in the shops by Q308.
The reference design includes the BlueVox2 QFN chip, and all the components necessary for a Bluetooth mono headset mounted on a four-layer printed circuit board. BlueVox2 is power efficient — permitting 15 hours talktime with a small 120mAh battery. BlueVox2′s range of features also includes hardware-based noise reduction technology at no extra cost. CSR’s all inclusive eBOM helps OEMs keep their costing simple and predictable.
The design also raises voice quality to the standard of a landline phone by using CSR’s AuriStream CODEC. AuriStream delivers an ITU-T mean opinion score (MOS) of up to 4.2 out of 5, even without the additional benefits of noise reduction. In comparison, headsets using only the more standard CVSD CODECs achieve a MOS of around 2.46. Calls made using AuriStream are of noticeably better quality.
BlueVox2 is the first ever ROM headset design to allow two or more Bluetooth devices to be connected to the same headset. This means that with one headset it is possible to take calls from both a work and personal phone or a phone and a VoIP dongle. The feature doesn’t impact the power consumption and is designed to be easy and intuitive to use.
BlueVox2 is the first ROM to adhere to Bluetooth v2.1+EDR, offering Secure Simple Pairing, which greatly simplifies the headset-to-phone pairing process while significantly increasing Bluetooth device security. With the enhanced inquiry scan Bluetooth v2.1 can also gather and present a greater range of information when searching for devices, including a list of services each device supports.
BlueVox2 integrates onto a single chip the world’s leading Bluetooth radio design, CODECs for the microphone and speakers, power management, a battery charger and a microprocessor to run virtual machine applications. BlueVox2′s silicon, based on CSR’s BlueCore6-Audio ROM, features a low cost 7x7mm QFN package as well as a 4.5×5.5mm BGA package option for the world’s smallest headset IC. The performance of BlueVox2′s radio is exemplary, with TX+8dBm and Rx -90Bm helping to overcome cross-body issues and increase range.
More info: CSR