AI, Can you identify echo?

Posted by admin
On March 15, 2021

Acoustic Echo in phone calls is caused when audio that is being played on the loudspeakers is then picked up by the microphone and afterwards transmitted to the far-end person who is talking. As a result the far-end talking person will hear himself/herself in a delay. When echo appears in a phone call it is […]

SoliCall Connect Vs. SoliCall Pro

Posted by admin
On October 5, 2020

We are frequently asked by call centers and enterprises to help them understand the difference between SoliCall Connect and SoliCall Pro. In this post we will cover these two products and highlight the key differences. What is common? Both these products are software-based products that aim to improve audio quality in telephony. SoliCall Pro is […]

Noise Cancelling Headsets – the soft version

Posted by admin
On March 19, 2020

What is required from a software to replace a noise cancelling headsets? In this post we will review the multiple functions of the noise cancelling headsets and discuss how they could be replaced by a software. Echo Cancellation Echo is one of the most disturbing source of noise. It appears when the audio that is […]

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 […]

DC offset and Audio Filtering

Posted by admin
On January 4, 2019

In this post we describe a phenomena called “DC offset” in audio signal and its impact on the quality of audio filtering like noise reduction, echo cancellation and automatic gain control. We say that a signal has a DC offset distortion when the mean amplitude of its waveform is not zero. A normal voice is […]

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 […]

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 […]

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 […]

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 […]

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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