CX20708 super wideband voi ce input processor soc complies with skype certification requirements for tv solutions conexant's CX20708 is industry's first dedicated super wideband voice input processor soc for telepresence and speech recognition applications. this highly integrated soc features high-fidelity 16-bit adc, microphone pre-amp, asynchronous sample rate converter, sync buffer, and our award-winning digital signal processor. the included advanced super- wideband voice processing algorithms deliver a crisp clear, full- duplex, low-latency, audio experience, requiring as little as two matched high-sensitivity unidirectional microphones. the flexible usb and i 2 s/i 2 c interfaces are ideal for integration in the high definition camera module or directly inside the television/ set-top-box. the CX20708 is a turnkey, single- chip solution that compensates for microphone self-noise, eliminates ambient noise, and maximizes long distance voice pick-up, all withoutloading the host cpu. this allows the system designer to achieve a consistent level of voice performance cross software applications and fast to market. conexant offers complete an evaluation kit (evk), including the evk board, data sheet, reference design schematics, avl, and sample silicon. applications ? telepresence/unified communication device ? speech recognition applications key features benefits i 2 s/usb interface flexible topology to match with the host system integrated super wideband voice processing higher performance voice quality far field pickup microphone and beam forming only require minimum of 2 microphones for long range speakerphone and speech recognition usage integrated microphone pre-amp, adc, and dsp single chip voice input sub-band acoustic echo cancellation enable full duplex speech recognition. part number CX20708 description super wideband voice input processor soc free datasheet http:///
CX20708 features codec ? high fidelity 16-bit adc ? configurable microphone pre- amp, up to 40 db ? mic bias ? on-chip, 50 mips, dual core audio processor ? fractional src and sync buffers ? serial data interface (i2s/pcm) ? i 2 c control interface ? usb 2.0, full speed uac compliant interface, slave ? support asynchronous usb audio data transfer mode ? super wideband voice processing algorithms ? sub-band acoustic echo canceller ? beam forming ? in-band acoustic noise reduction ? far field pickup microphone auto gain control ? parametric microphone eq ? audio sample rate: 8,16, 24, 32, 44.1, 48 khz ? 9x9mm 76 qfn package conexant product portfolio conexant?s comprehensive product portfolio includes solutions for imaging, audio, video surveillance, and embedded modem applic ations. dma dsp memory controller dma uart jack sense clock circuitry bias generator mon adc usb pcm/i2s i2s_pcm_1_clk i2s_pcm_1_rx_ws i2s_pcm_1_rx_dat i2s_pcm_1_tx_ws/spdif out i2s_pcm_1_tx_dat usb_dp usb_dm usb_5vdet uart_rx uart_tx nvclk nvdat gpo 0/cts gpo 1 matrix 0 matrix 1 matrix 2 volume adc adc mic in mic in mic bias mic bias xtal in/ master in xtal out sense gpo2 gpo3 gpo4 voltage monitor spi i2c slave ii2c_en i2c_spi_csn spi_miso i2c_sda/spi_mosi i2c_spi_scl dsp pcm/i2s i2s_pcm_2_clk i2s_pcm_2_ws i2s_pcm_2_rx_dat i2s_pcm_2_tx_dat CX20708 interface diagram ? 2011 conexant systems, inc. all rights reserved. conexant and the conexant logo are registered trademarks of conexant systems, inc. all other trademarks are owned by their respective owners. although conexant strives for accuracy in all its publications, this material may contain errors or omissions and is subject to change without notice. this material is provided as is and without any express or implied warranties, including merchant ability, fitness for a paparticular purpose and non-infringement. conexant shall not be liable for any special, indirect, incidental or consequential damages as a result of its use. www.conexant.com general information: u.s. and canada: (888) 855-4562 international: 1+ (949) 483-3000 headquarters 4000 macarthur blvd. newport beach, ca 92660 doc# pbr-202748 free datasheet http:///
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