A residual echo cancellation scheme for hands-free telephony

Seon Joon Park, Chungyong Lee, Dae Hee Youn

Research output: Contribution to journalLetterpeer-review

9 Citations (Scopus)


A residual echo cancellation scheme based on the autoregressive (AR) analysis is proposed for hands-free telephony. Residual echo is whitened by the inverse filter using the estimated AR coefficients. Removing speech characteristics of the residual echo signal, the noise reduction system successfully reduces the power of residual echo as well as that of ambient noise. In a car cabin, the proposed method improved echo return loss enhancement by 8.7 ∼ 9.9 dB as compared with the conventional combined system.

Original languageEnglish
Pages (from-to)397-399
Number of pages3
JournalIEEE Signal Processing Letters
Issue number12
Publication statusPublished - 2002 Dec

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics


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