Noise Suppression in Cellular Telephony

  • Malay Gupta Research in Motion, 295 Phillip St., Waterloo, ON N2L 3W8, Canada
  • Chris Forrester Research in Motion, 295 Phillip St., Waterloo, ON N2L 3W8, Canada
  • Sean Simmons Research in Motion, 295 Phillip St., Waterloo, ON N2L 3W8, Canada
Keywords: Frequency domain analysis, Microphones, Background noise, Cellular telephony, Frequency domains, Frequency-dependent, Gain function, Noise suppression, Noisy speech, Second group, Spatial dimension, Spectral components, Synthesis techniques, Temporal dimensions, Time analysis

Abstract

Some of the methods that are used for noise suppression in cellular telephony are discussed. Noise suppression methods are divided into two groups according to the number of microphones used in the noise suppression system. The first group of methods utilizes a single-microphone and the second group utilizes a number of microphones. Most of the techniques proposed in the single-microphone noise suppression category function in the frequency-domain and use the short-time analysis-synthesis technique. These techniques apply a frequency-dependent gain function to the spectral components of the noisy speech to attenuate the components with greater noise content. The second group of techniques utilize a number of microphones that have the ability to utilize spatial dimension in addition to temporal dimension to suppress the background noise (BGN) effectively.
Published
2009-09-01
How to Cite
1.
Gupta M, Forrester C, Simmons S. Noise Suppression in Cellular Telephony. Canadian Acoustics [Internet]. 2009Sep.1 [cited 2019Oct.16];37(3):78-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2142
Section
Proceedings of the Acoustics Week in Canada

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