NCT has ported its ClearSpeech noise and echo cancellation libraries to the ADSP-BF533 Blackfin processor. In addition, NCT is making this software available as building blocks for National Instruments LabVIEW. The move is intended to ease development of applications including mobile phones, radio systems, intercoms, hands-free kits and voice recognition systems.
NCT offers two libraries for Blackfin. The 16 kHz sampling-rate library targets wideband, high-voice-quality, and hands-free telephony applications. It provides four user-configurable echo cancellation parameter sets. The library runs at 125 MIPS, and requires 16 KB of instruction memory and 36 KB of data memory.
An 8 kHz sampling-rate library designed for radio communication systems used in noisy environments is also available. This library requires only 15 MIPS, 7 KB of instruction memory, and 10 KB of data memory. It offers Intelligent Squelch Filter (ISF) and Speech in Noise Detector (SND) functions to further enhance audio performance. Both the 16 kHz and 8 kHz libraries provide up to 18 dB of noise reduction
NCT is converting these noise and voice echo reduction technologies into LabVIEW building blocks. These building blocks will make it easier for engineers to evaluate and integrate NCT's software into their products, thus reducing development costs and time to market. For more information on the LabVIEW Embedded Module for Blackfin, see http://www.ni.com/labview/blackfin.
For more information on ClearSpeech for Blackfin, contact firstname.lastname@example.org or telephone +44 (0)1954 205 502.