Paper Info
Title
Performance evaluation of band-limited LPC vocoder and band-limited RELP vocoder in adaptive feedback cancellation
Abstract
Feedback oscillation is one of the major problems faced by the hearing aid users. Adaptive feedback cancellation is used to suppress the feedback by using an adaptive filter to estimate the feedback path. However, this estimate is biased due to presence of high correlation between the original input signal and the loudspeaker input signal. Bias problem produces modeling error and can result in cancellation of the desired signal. Bias reduction can be obtained by using band-limited linear predictive coding based technique (BLPC) and band-limited residual excited linear predictive coding (BRELP) based technique. The paper compares performance of band-limited linear predictive coding based vocoder and band-limited residual excited linear predictive coding based vocoder in sound quality and bias reduction. The BLPC-AFC achieves more reduction in high-frequency correlation than BRELP-AFC. However, BRELP vocoder has a better output sound quality.
Year
DOI
Venue
2015
10.1109/ICACCI.2015.7275596
2015 International Conference on Advances in Computing, Communications and Informatics (ICACCI)
Keywords
Field
DocType
Adaptive feedback cancellation (AFC),linear predictive coding (LPC),residual excited linear predictive coding (RELP)
Residual,Decorrelation,Control theory,Hearing aid,Computer science,Sound quality,Speech recognition,Adaptive filter,Loudspeaker,Linear predictive coding,Adaptive feedback cancellation
Conference
ISBN
Citations 
PageRank 
978-1-4799-8790-0
0
0.34
References 
Authors
2
2
Name
Order
Citations
PageRank
Ankita Anand121.40
Richa Bhatia211.16