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Echo Cancellation >  Acoustic Echo Cancellation

Acoustic Echo Canceller (AEC) Software

VOCAL's acoustic echo canceller (AEC) algorithm has been optimized for different DSPs and microprocessors. An acoustic echo canceller may need to address different acoustic and noise control environment issues. Constraints include the volume of the enclosure, the required bandwidth, and the tolerable delay. VOCAL's Acoustic Echo Canceller is easily integrated and customized to meet such needs. It has been incorporated into such products as Speakerphones (half/full duplex), Hands-Free Telephone Systems, Baby Monitors, as well as many others. Our extensive experience in echo cancellation optimization and tuning means that we can provide unparalleled support integrating our Acoustic Echo Canceller into your product.

Acoustic Echo Cancellation

VOCAL has developed a variety of echo cancellation modules and solutions, including acoustic echo cancellers (AEC), line echo cancellers (LEC), and digital network echo cancellers (DNEC). Our echo cancellers are used in millions of installations world-wide, including the public telephone system, a variety of VoIP products, as well many other types of manufactured items. Our experts can provide a custom, optimized echo cancellation solution to meet most types of processing and acoustic environment requirements. VOCAL's Acoustic Echo Cancellation Software solution can be designed for standard 8kHz and wideband applications. These echo cancellers have been rigorously tested, meeting ITU compliance tests as well as our own. Please contact us for more information or to arrange a demonstration.

VOCAL's embedded software libraries include a complete range of ETSI / ITU / IEEE compliant algorithms, in addition to many other standard and proprietary algorithms. Our software is optimized for execution on ANSI C and leading DSP architectures (TI, ADI, AMD, ARM, MIPS, CEVA, LSI Logic ZSP, etc.). These libraries are modular and can be executed as a single task under a variety of operating systems or standalone with its own microkernel.

Features

  • Mostly compliant with ITU G.168 Recommendation
  • Passes rigorous proprietary tests
  • Rapid convergence
  • Double talk detection
  • Low divergence during double talk
  • Fast re-convergence for echo path changes
  • Long configurable echo tail length (up to 256ms)
  • Non-linear Processing (NLP)
  • Built-in noise reduction
  • Comfort Noise Generation (CNG)
  • Supports user callable functions

Additional Information