Echo Cancellation, Art or Science? Part IV

  • On November 19, 2016
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.
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Why Echo Cancellation for Android is a Difficult Task?

  • On December 12, 2016
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 […]
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Tips for Installing PBXMate in a Distributed VoIP Network

  • On November 19, 2016
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 […]
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Audio Quality in Video Conferences

  • On November 19, 2016
Background In the last couple of years the percentages of employees that work from home rapidly increases. There are three main reasons for this phenomenon: (1) Efficiency. No need to spend hours driving to/from the office and in many cases the amount of interrupts while at home is lower than at the office. (2) Cost. […]
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Flash Conference with Acoustic Echo Cancellation

  • On August 12, 2018
Background Following our previous post on acoustic echo cancellation on flash calls, we got requests to improve audio quality also on conference calls that are based on flash technology. The case study that was described in the previous post dealt with audio quality for regular flash calls, and showed how to convert them to SIP […]
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Installing PBXMate with Elastix – Phone Setup

  • On November 19, 2016
  Background In a previous post we reviewed the basics of installing of PBXMate with Elastix. In this post we will review how to configure your phones to work with PBXMate. This post will discuss the configuration for VoIP phones.  In a future post we will review the configuration required for analogue phones.
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Intercoms and Acoustic Echo Cancellation

  • On November 19, 2016
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:
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Installing PBXMate with Elastix

  • On September 7, 2017
[Important Note]: New versions of Elastix no longer support add-ons technology. To install PBXMate with new version of Elastix we offer our plug-and-play technology that works out-of-the-box with Elastix. For details, please visit PBXMate page.   Background As recently announced, the PBXMate is now an Addon to Elastix. As a result, installing PBXMate with Elastix […]
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Echo Cancellation with Flash – A Case Study

  • On December 12, 2016
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 […]
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Echo Cancellation, Art or Science? Part III

  • On November 18, 2016
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.
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