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CSR, Sensory put speech recognition in Bluetooth headset

Posted: 20 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:speech recognition? Bluetooth? CSR headset? Sensory technology?

CSR and Sensory have teamed up to provide speech recognition on Bluetooth headsets and car kits by incorporating Sensory's FluentSoft Bluetooth Suite software into CSR's BlueCore5-Multimedia platform.

Speech recognition will allow users to issue voice commands to control functions such as confirming a valid link, checking battery level and dialing frequently called phone numbers. Such functions today are implemented using combinations of buttons and press-and-hold intervals for the buttons.

Remembering these combinations is a challenge for many users. This, in turn, limits the number of functions currently available on headsets. Sensory has, in fact, added extra functions such as "check battery" and "what can I say?" which prompts the headset to provide a verbal list of the valid optional phrases for that particular situation.

U.S.-based Sensory's SX speech synthesis trechnology is also integrated to complement FluentSoft, thus enabling real-time voice prompts and confirmations as well as help on device operations such as pairing.

Sensory has ported its speech technology to other processors, including the ARM9, but also offers its own chips that are essentially speech-enabled 8bit MCUs that typically replace standard MCUs in a CE or toy design but add basic speech functionality.

FluentSoft is speaker independent and does not require training. The largest active setwords that the technology is trained to recognize during a specific use scenariois 16 words. But numerous sets are available depending on the use scenario.

FluentSoft works with EDR and non EDR versions of Bluetooth.

CSR's BlueCore5-Multimedia functionality is enabled by the company's embedded Kalimba DSP core. It offers a signal-to-noise ratio of -95dB and ultra-low power consumption.

Although CSR has announced its next-generation BlueCore6, this version does not, as yet, integrate the Kalimba DSP core.

The radio transmits at +8dBm and receives at -90dBm which eliminates interference when listening to music or taking a call. When used in stereo headset applications, BlueCore5-Multimedia enables battery life of more than 12hrs of music playback.

CSR's integration of Sensory's technology is the latest example of its eXtension Programme.

Working with third-party software vendors, CSR has delivered a wide range of software plug-ins for the on-chip DSP, further reducing design cycle time while allowing enough power to support future software enhancements.

Previous eXtension announcement include: APT brings pro-audio quality sound to Bluetooth and CSR adds text-to-speech to BlueCore5 platform.

"Without speech recognition, product designers have been constrained in form factor, features, and user interface," said Sensory CEO Todd Mozer. "Our FluentSoft Bluetooth Suite ported to the popular BlueCore5-Multimedia unleashes designers' creativity to add custom features, and deliver a user experience that was not possible before."

Anthony Murray, Senior Vice President of CSR's Wireless Audio Strategic Business said, the added functionality is "good news for the automotive market, as we can now provide a single-chip solution with Bluetooth technology and speech recognition, considerably reducing manufacturing costs of hands-free car kits and embedded Bluetooth designs."

- Jack Shandle
Wireless Net DesignLine

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