His team researches and develops speech enhancement algorithms implemented for tasks such as acoustic echo cancellation and noise reduction.īefore joining QNX, Shree was a DSP Engineer for a number of audio companies, including Kurzweil Music Systems and Lexicon. Shreyas (Shree) Paranjpe is a Team Lead in the QNX Acoustics group. in Experimental/Cognitive Psychology from Michigan State University, and an Masters degree in Applied Psychology from the Stevens Institute of Technology. Scott Pennock is Senior Hands-Free Standards Specialist at QNX.īefore joining QNX, he was a Lead Acoustic Test Engineer at Apple, a Senior Systems Engineer at OnStar researching speech enhancement technologies, and a Speech Technologies Specialist at Lucent, also working on speech enhancment technologies. in Psychology from Brock University, and a Ph.D. He holds over 47 patents in acoustics processing, and is an accomplished author and presenter. Prior to joining QNX, he developed three software programs for the analysis of neural clusters (AUTOCUT), hippocampal place fields (PFA), and genetic arrays (GAE). Phil Hetherington is Director of R&D at QNX, where he is responsible for all research, development, and quality assurance activities relating to speech and automotive acoustics. Our solution has been validated and will be deployed (summer 2010) in . We have developed novel methods for reducing the computational complexity and memory requirements for Acoustic Echo Cancellation. The challenge is, of course, to expand or reconstruct the smaller subset of M perceptually important subbands back to the full set of R bins required for the frequency-to-time . Similarly, we reduce the number of FFT bins . The human auditory system maps a linear frequency scale onto a non-linear perceptual scale. Our solution combines the non-linear aspects of the human auditory system with the strengths of a traditional subband adaptive filter. describe a "dual-mode" solution that splits a wideband signal into low band (0-4,000 Hz) and high band (4,000-8,000 Hz) regions. Our existing Aviage Acoustic Processing software library (released in summer 2009) already processes wideband speech operating at a 16,000 Hz sample rate. The benefits of using wider bandwidth for speech communication are described well by Pennock and Hetherington, and in the works they cite. High quality, full-duplex Acoustic Echo Cancellation (AEC) is an integral component of a hands-free speakerphone communication system, because it allows participants to .
0 kommentar(er)
