LV1224B

General Description

The CS48LV12 and CS48LV13 ultralow power voice processors feature Cirrus Logic’s patented SoundClear® technology to provide a new standard in HD Voice quality performance, functionality, and cost effectiveness. These ICs provide a total voice processing solution for handset and hands-free communications that deliver best-in-class noise reduction, echo cancellation, and speech recognition. The CS48LV12 and CS48LV13 can enable advanced features including always-on voice trigger, command recognition, ASR pre-processing, and audio enhancement. Innovative single and multi-mic algorithms with intelligent speech tracking and noice elimination assure optimal user experience in the most challenging and dynamic noise environments and deliver superior performance despite varying speech levels, talker distance, or product orientation.

The CS48LV12 and CS48LV13 feature an integrated media processor with built-in virtual surround, bass enhancement, bass synthesis, multi-band compression, and parametric EQ algorithms to enrich music playback through wireless speakers and headphones. All are tunable through a simple GUI. In addition, the CS48LV13 provides the option of adding a Cirrus Logic proprietary Voice Activity Detector for always-on ASR capability and integrated TrulyHandsfree™ Voice Control. Also available is Cirrus Logic’s ASR Enhance™ specialized preprocessor to enhance the accuracy of any ASR (Automatic Speech Recognition) engine under noisy conditions. An expanded menu of third-party media playback algorithms from Dolby and DTS can also be integrated. Powerful real-time diagnostic and tuning tools combined with specialized labs and a global applications support network assure ease of design, optimal performance, and achievement of network and industry compliance.

Overview of Features

• Complete easy-to-implement voice solution including all
essential voice, audio, and speech DSP features for
flagship smartphones, tablets, and computing products
• SoundClear Voice™ noise reduction, echo cancellation,
and voice enhancement
• RAPID2™ GUI-based diagnostic and tuning tool for ease
of design-in
• Media postprocessing support
—Integrated Cirrus Logic playback enhancement for
speakers and headphones
—Optional Dolby® and DTS® playback enhancement 1
• ASR Enhance™ automatic speech recognition (ASR)
preprocessing for increased ASR accuracy in noisy
environments
• Voice activity detector (VAD) enables always-on speech
recognition
• TrulyHandsfree™ voice control by Sensory, Inc.
supported
• Powerful 130-MHz dual-MAC 32-bit DSP core
• Ultralow power consumption (core typically <8 mW @ 1 V
during narrowband call)
• I2S, I2C, SPI™ digital connectivity

Applications

The CS48LV12/13 provides a complete voice, audio playback and speech preprocessing solution for smartphone, tablet, laptop, headphone/headset, and speaker/speakerphone applications. They are optimized for devices where pristine voice quality and echo-free, full-duplex communication is required, especially under conditions of adverse noise and where space and power are limited.