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Repetitions and continuity in calls

  • Posted by admin
  • On December 6, 2020
Unnecessary repetitions…repetitions…repetitions are disturbing and break the continuity of the call. When people have a discussion while they are physically close to each other, you hardly experience repetitions. But nowadays due to Covid-19 and social distancing many interactions happen via phone/video calls. In these calls repetitions are very common and they break continuity and significantly […]
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Noise cancelling app cancels what?

  • Posted by admin
  • On December 22, 2019
We are frequency approached by new prospects with a simple request: could you help us cancel the noise in our audio? In order to address this question professionally, we first we need to understand what exactly stands behind the general word “noise” in the prospect’s request. Apparently there are many types of noise in audio […]
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Echo and noise in Kiosks and Vending Machines

  • Posted by admin
  • On April 23, 2019
Kiosks and vending machines are perhaps the most widely used devices that can be found almost in any public area. Their main purpose is to provide a wide spread service in almost any public location. These devices are very common and their number is not very different from the size of the human population. For […]
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Noise during online courses

  • Posted by admin
  • On November 20, 2018
The number of online courses has been increasing over the last years. Education institutes, including the most respectable universities, offer e-learning for an increasing share of their courses. Online training is also widely used by internal education centers in many organizations. Although e-learning is widely used world-wide, there are areas in which it is the […]
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Acoustic Echo Cancellation Vs. Acoustic Echo Suppression

  • Posted by admin
  • On September 2, 2018
Echo is a known problem in telephony and when it appears it dramatically reduces the quality of the audio. In some cases the echo can even turn out to howling effect that generates a deafening noise. To familiarize yourself with the basic terms that relates to echo cancellation, you are invited to read our blog-series […]
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PBXMate vs. SoliCall Pro

  • Posted by admin
  • On January 10, 2018
If you are a call center, conference bridge provider or any other organization looking to improve audio quality in your telephony using our innovative technology, you might ask yourself which of our products is most suitable for you. Assuming you are not developing your own telephony software our SDKs are not an option but what […]
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How to evaluate an echo cancellation algorithm?

  • Posted by admin
  • On November 21, 2017
  When you encounter an echo problem in your application, network or devices it is obvious you need to introduce an echo canceller.  Your next step is to explore at least two possible locations for performing the echo cancellation: cancelling the echo on the client side or doing it on the server side. The decision […]
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Echo Cancellation with negative echo tail

  • Posted by admin
  • On May 7, 2017
Background Echo path/tail is one of the most fundamental parameters when performing echo cancellation. In previous posts, we elaborated on the importance of echo tail and we also provided a Do It Yourself (DIY) method to calculate the echo tail. In most usage scenarios, the value of the echo tail will be a positive one […]
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Time manipulation and its impact on echo cancellation

  • Posted by admin
  • On July 1, 2016
Background Time manipulation is a known technique in audio processing. It can be used to either compress the audio (resulting in speed-up) or expand the audio (resulting in slow-down). Usually this is done without altering the pitch and therefore without changing the fundamental signature of the voice.
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Echo cancellation is now available for PJSIP

  • Posted by admin
  • On May 15, 2016
Background PJSIP is an is a free and open source multimedia communication library. One of the most important components that influence the audio quality in VoIP communication solutions is the existence of a good echo cancellation.  SoliCall’s acoustic echo cancellation software is a powerful echo cancellation technology that is also flexible to support and tune […]
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