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Discussion Groups | Echo Cancellation

Technical discussions about echo cancellation and adaptive filtering in general.

  

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Reflections & multiple tail circuits   [2 Articles]
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Mark Antony - Sep 16 2002
Hello, I have one question regarding 2, 3 or more reflections and multiple tail circuits. Is the double reflections or three reflections overall can be calle... Reflections & multiple tail circuits

How to Specify TailLen   [3 Articles]
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Suryadi - Aug 27 2002
I read about echo cancell that it can can cancell echo between 30 ms and 62 ms. These number get from the delay in Hybrid 30 ms (240 samples) and the tailLen 32 m... How to Specify TailLen

Does anybody know where I can get C source code for the AEC?   [5 Articles]
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zhang_zhh - Jul 25 2002
Hi all, I am working on the H323 VoIP terminal in the PC environment. but in order to cancel the echo from speaker even from the headset(I am not sure if this ... Does anybody know where I can get C source code for the AEC?

Re:Re: Does anybody know where I can get C source code fo r the AEC?
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- Jul 23 2002
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 ... Re:Re:  Does anybody know where I can get C source code fo r the AEC?

-4.7 dbpa signal
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basaravikiran - Jun 6 2002
i am testing g.167 can anybody give me an idea to generate -4.7 dbpa signal ... -4.7 dbpa signal

distortion measurement and power measurement
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basaravikiran - May 30 2002
hello group members, we are testing the acoustic echo canceller as per g.167 spec. here while testing we have to calculate distortion at rout. how the acoustic di... distortion measurement and power measurement

discriminating double talk and echo path change
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solv_78 - May 20 2002
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 v... discriminating double talk and echo path change

Power Measurement Device
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d_madhu_rao - May 19 2002
Hello Friends, Here I am with a doubt which I would like to clarify from you. What is the detector - indicator unit in the power measurement device as indic... Power Measurement Device

Test Vectors Generation.
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d_madhu_rao - May 17 2002
Hello Friends, 1)Can you please suggest me certain methods for generating the Test Vectors of G.168 standard. 2) What are Hoth noise and Comfort Noise and h... Test Vectors Generation.

RE: New Member seeking help to master Echo Cancellation Techniques.   [2 Articles]
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Dharmendra Lingaiah - May 10 2002
Hello Madhu, I have tried to answer your questions below ... 1. Why 4-wire system is used between Hybrid and PSNT and 2-wire system is used as subscriber... RE:  New Member seeking help to master Echo Cancellation Techniques.
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