Echo Cancellation and silence

Posted by admin
On March 11, 2015

Background Following our previous post on synchronization, in this post we would like to cover a specific aspect of un-synchronized input which causes the speakers to play silence that is not monitored and therefore unknown to the AEC.

Posted by admin
On January 1, 2015

Background In this post we will discuss the challenge of synchronizing the audio that is given as the input to the echo cancellation software running on Android. This post is a continuation to a blog series we published on echo cancellation and specifically on the post that deals with importance of synchronization in echo cancellation. […]

Posted by admin
On December 6, 2013

Background In the previous posts of this series we discussed the challenges of echo cancellation algorithms with respect to: 1. Echo path search . 2. Echo invalidation. 3. Howling effect. 4. Saturation. In this post we will discuss a common implementation issue we have seen many times – audio stream synchronization.

Posted by admin
On April 10, 2013

Background In the previous posts of this series we discussed the challenges of echo cancellation algorithms to efficiently handle the echo path, the complexity introduced by echo invalidation and the howling effect. In this post we will discuss another important aspect with regards to echo cancellation called Saturation.

Posted by admin
On March 10, 2013

Background SoliCall offers different software solutions for audio quality improvements. One of the areas with an increasing demand is the need to solve echo issues with Android devices. As discussed in few of our previous posts on echo cancellation, in real-life conditions performing a good echo cancellation is a rather complex task. In addition, it […]

Posted by admin
On February 3, 2013

Background Many VoIP network administrator face a common problem that their users complain about the quality of their phone calls. The most common complains are about noise, echo and other artifacts. If the network is distributed, it becomes very difficult to analyze and control the multiple components in the network starting from the end devices […]

Posted by admin
On November 12, 2012

Background One of the disturbing problems that appears when using intercoms, or other low-end full-duplex communication devices, is the generated echo. Usually the echo is significant in these situations due to the following two reasons:

Posted by admin
On September 7, 2012

Background From time to time we are getting requests to improve audio quality in flash calls and mainly to help remove echo. In a previous post, Echo Cancellation with Flash Clients, we discussed few techniques that could be helpful. In this post we show a case study for integrating a centralized audio filtering to improve […]

Posted by admin
On August 29, 2012

Background In previous posts on echo cancellation we discussed the challenge of echo cancellation algorithms to efficiently handle the echo path, especially when it is long and volatile, and the complexity introduced by the invalidation phenomena. In this post we will discuss another aspect in echo cancellation called Howling.

Posted by admin
On July 20, 2012

Background In the previous post on acoustic echo cancellation we discussed the importance and the challenge in handling of the echo path. In this post we will discuss a different aspect that echo cancellation algorithm must handle. It is not rare that users change the setting of their audio device during a call. For example […]

Page 2 of 3123

Scroll

Echo Cancellation and silence

Echo Cancellation on Android – synchronizing the input

Echo Cancellation, Art or Science? Part V

Echo Cancellation, Art or Science? Part IV

Why Echo Cancellation for Android is a Difficult Task?

Tips for Installing PBXMate in a Distributed VoIP Network

Intercoms and Acoustic Echo Cancellation

Echo Cancellation with Flash – A Case Study

Echo Cancellation, Art or Science? Part III

Echo Cancellation, Art or Science? Part II