Acoustic Echo Cancellation Student: Yi-Chi Huang Wei Chou Supervisor: Bram Cornelis Final...

Acoustic Echo Cancellation

Student: Yi-Chi Huang Wei ChouSupervisor: Bram Cornelis

Final presentation 4/12/08

Overview

Review Block-LMS FDAF PBFDAF

Performance(PBFDAF) Constant step-size Adaptive step-size

Conclusion

Review

Block-LMS

FDAF

PBFDAF

Performance

Music case

Performance

Randn caseMic:[1,1,1]Loud speaker [1.2,1.2,1.2]Room dimension [37,37,39]Reflection coeficient [1,1,1,1,1,1]Filter lenght 2048Sampling frequency 8000

Performance

Randn caseBlock length = 16Near end = randn(100000,1)Far end = randn(100000,1)

Performance

Randn case

Performance

Randn case

Performance

Randn caseCaculate

several times(R) during a block time

Performance

Randn caseFilter length = 64Block length = 16Near end = randn(100000,1)Far end = randn(100000,1)

Performance

Randn case

Performance

Randn case

Performance

Change Block length

Performance

Constant step-size

Performance

Adaptive step-size

Performance

Performance

Reference [1] Eneman, K.; Moonen, M. On Iterating the

Partitioned Block Frequency-Domain Adaptive Filter [2] JOHN J. SHYNK. Frequency-Domain and.

Multirate Adaptive Filtering. [3] Gerald Enzner, Peter Vary. ROBUST AND

ELEGANT, PURELY STATISTICAL ADAPTATION OF ACOUSTIC ECHO CANCELER AND POSTFILTER