Acoustic Echo Cancellation for Stereophonic Teleconferencing

@article{Sondhi1991AcousticEC,
  title={Acoustic Echo Cancellation for Stereophonic Teleconferencing},
  author={M. Mohan Sondhi and D. Morgan},
  journal={Final Program and Paper Summaries 1991 IEEE ASSP Workshop on Applications of Signal Processing to Audio and Acoustics},
  year={1991},
  pages={0_141-0_142}
}
Since the echo is generated by passing the signals x l ( f ) , x 2 ( t ) through the impulse responses h l ( t ) and h2(r) , respectively, it is clear that a replica of the echo can be generated as shown in the figure. One might argue that any one of tlie signals x1 or x 2 should suffice, since the two are completely coherent (being filtered versions of the same input signal). This is feasible if at least one of the impulse responses g l or g 2 has an inverse which is stable and of relatively… CONTINUE READING

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