How to Detect Double Talk in Acoustic Echo Canceller

Started by Fuliang yin in Echo Cancellation20 years ago 1 reply

Hi, An echo canceller must include the double-talk module. But in acoustic echo canceller, the energy of the acoustic echo...

Hi, An echo canceller must include the double-talk module. But in acoustic echo canceller, the energy of the acoustic echo often is larger than that of far-end speech because of effect of power amplifier in TV. This situation often occurs in the videoconference system. Can any


Double Talk Detector

Started by Anonymous in Echo Cancellation20 years ago 8 replies

Hello friends, I am working on Acoustic echo cancelletion. I am facing problems in selecting DTD(Double Talk Detector). In...

Hello friends, I am working on Acoustic echo cancelletion. I am facing problems in selecting DTD(Double Talk Detector). In Acoustic case Giegels' algorithm does not work, i have tried algorithms based on far and near end energy estimation but their results varies drasti


DTD

Started by Partha Ghosh in Echo Cancellation20 years ago

hi friends, As i am working in a echo cancellor project i need some information about dtd (double talk detector ).If you can...

hi friends, As i am working in a echo cancellor project i need some information about dtd (double talk detector ).If you can provide me with any referrence books ,sites or any documents on implimentation of dtd,types of dtd and their theories it would be a lot of help to me .Pl


Initital Convergence Reason

Started by sonicbio in Echo Cancellation19 years ago

Hello All, I have been working on building up a acoustic echo canceller on a digital phone based on PCM. With many...

Hello All, I have been working on building up a acoustic echo canceller on a digital phone based on PCM. With many reference I have found with this group on double-talk functionality and near-end noise cancellation, I have discovered that a more robust syste


discriminating double talk and echo path change

Started by solv_78 in Echo Cancellation19 years ago

Hi, Is echo path change a common problem in LEC. Is there any standard way of discriminating this with double talk. How adequate ...

Hi, Is echo path change a common problem in LEC. Is there any standard way of discriminating this with double talk. How adequate are methods which depend on the variance of the input signal for discrimination, particularly since tones send from one end can confuse such discrimi


Re:Re: Does anybody know where I can get C source code fo r the AEC?

Started by Anonymous in Echo Cancellation19 years ago

Hello Maximus, There are algorithms that do not rely on level differences to determine if double-talk is present. These algorithms...

Hello Maximus, There are algorithms that do not rely on level differences to determine if double-talk is present. These algorithms do not suffer from input level differences. I would suggest you do a patent search on echo canceller double-talk detectors. One detector I k


About Double Talk Detector

Started by syed ahmed in Echo Cancellation16 years ago

Hi, I am sameer, new member of this excellent group. Its very nice to see that student like me are getting very valuable...

Hi, I am sameer, new member of this excellent group. Its very nice to see that student like me are getting very valuable advices from the experianced techonocrats. I am doing my masters digree in communications and doing my final year project in " Echo cancellation in Packet telepho


about dtd

Started by Kousalya in Echo Cancellation16 years ago

hi, i am kousalya, newly joined member of this group,i am doing my project on line echo cancellation,i want some information...

hi, i am kousalya, newly joined member of this group,i am doing my project on line echo cancellation,i want some information regarding double talk detection algorithms, first thing i want to know is tht, is there any difference in line EC& acoustic EC in DTD implementati


Double talk, Geigel

Started by jfa4...@yahoo.com.ar in Echo Cancellation16 years ago

Hello: I am implementing a EC for a university project, and I have some problems to detect double talk condition with the Geigel's...

Hello: I am implementing a EC for a university project, and I have some problems to detect double talk condition with the Geigel's algorithm. I am using this expression for detect the doble talk |y(n)| >= k max [|x(n)|, |x(n-1)|, .., |x(n-L)|] where : y: near speech x: far speech The questions are: I must use others conditions further