Leaky NLMS

Started by ganesa1234 in Echo Cancellation15 years ago 2 replies

Dear Members I am Ganesh, working on Echo Cancellation for VoIP networks. While doing my simulations with a few different...

Dear Members I am Ganesh, working on Echo Cancellation for VoIP networks. While doing my simulations with a few different algorithms like LMS and NLMS, i didnt get a very satisfactory result. But when i used Leaky NLMS it works perfectly. Does anyone know w


complex NLMS update?

Started by Chandrasekaran C in Echo Cancellation16 years ago 1 reply

Hi all, I am using NLMS complex Adaptive filter. In the coefficient update part, error is normalized with input signal power...

Hi all, I am using NLMS complex Adaptive filter. In the coefficient update part, error is normalized with input signal power and is multiplied with gain and reference signal. Input power is X X* (* complex conjugate). This includes addition of square of two numbers. My problem


DC shifting of the filter in NLMS?

Started by Andrew Xiang in Echo Cancellation15 years ago 6 replies

I noticed the DC shifting upward of the filter(impulse response) sometimes? Anyone know what caused that and how to avoid it? ...

I noticed the DC shifting upward of the filter(impulse response) sometimes? Anyone know what caused that and how to avoid it? thanks Andrew


music echo cancellation

Started by Navin in Echo Cancellation17 years ago

hello all, I have implemented a 16 bit fixed point (simulation on a PC) nlms based algorithm in c. While this seems to work great...

hello all, I have implemented a 16 bit fixed point (simulation on a PC) nlms based algorithm in c. While this seems to work great for audio input that is vocal, i seem to be running into problems when i use music (guitar and bass) inputs. are there any issues that i need to consider/


RE: Peak search doubts.....

Started by Dharmendra Lingaiah in Echo Cancellation17 years ago 4 replies

Hello Muk, Everybody gets to read something in some paper doc .... right ??? I just wanted to know which paper it is .........

Hello Muk, Everybody gets to read something in some paper doc .... right ??? I just wanted to know which paper it is ...... !!!! Regarding your query for Subband-nLMS ...you can search www.researchindex.com for papers. Peak search methods vary by algorithm impleme


echo simulation query using vc++

Started by shah...@yahoo.com in Echo Cancellation14 years ago 1 reply

hi to all i am working on acoustiv echo cancellation simulation based on vc++ using nlms algorithm. i got the result but not up to the...

hi to all i am working on acoustiv echo cancellation simulation based on vc++ using nlms algorithm. i got the result but not up to the mark.i had give wavfile wich has reverberation time of 50 ms. i had given pure wave file (without echo) to the filter block,it is estimating properly but not geting result.so can anybody help in that.what should be my filtertaps length? any suggest


implement AEC on DSP

Started by popf...@gmail.com in Echo Cancellation12 years ago

Hi,all I have implement an AEC algorithm (Frequency Domain NLMS) on DSP (TI c5509), but when I test it in real room the ERLE is 16dB(with...

Hi,all I have implement an AEC algorithm (Frequency Domain NLMS) on DSP (TI c5509), but when I test it in real room the ERLE is 16dB(with white noise), will test by compositive speech source with line_in the ERLE is 25dB. But, I always see that some AEC product's ERLE can get 25dB-30dB, So I want to konw the method they test. 1,what's the test source. white noise or speech signal? ...