Patent ID: 6628781
Filing Date: 2003-09-30
Classification: H04M

Abstract:
A communications device for providing bi-directional audio communications between a near-end user and a far-end user via a bidirectional communications channel, comprising:an adaptive echo canceler receiving a near-end audio signal and a far-end audio signal and providing an echo-canceled near-end audio signal for transmission to the far-end user via the communications channel, said adaptive echo canceler including a first bank of analysis filters for filtering the near-end audio signal, a second bank of analysis filters for filtering the far-end audio signal, and a bank of synthesis filters for filtering sub-band echo-canceled signals generated within said adaptive echo canceler, wherein a âˆ’3 dB bandwidth of a first of said synthesis filters and a âˆ’3 dB bandwidth of a second of said synthesis filters overlap in frequency.