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Noise cancellation for at-home agents

  • Posted by admin
  • On May 27, 2018
  • 0 Comments
  • at-home agents, Noise Cancellation, noise in home office
In today’s world, an increasing number of employees are working from their home-office. Few of the advantages of this work model are: reducing cost on infrastructure and shared work spaces, minimizing geographic limitations and saving commute time.  There are many organizations that appreciate the advantages of such work model and encourage it. Following are few […]
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How to evaluate an echo cancellation algorithm?

  • Posted by admin
  • On November 21, 2017
  • 0 Comments
  • Acoustic Echo Cancellation, echo cancellation
  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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Noise map for call centers

  • Posted by admin
  • On September 4, 2017
  • 0 Comments
  • call center noise cancellation, call center noise reduction, noise map
Background Call centers suffers from significant ambient noise that is originated from multiple locations like: Other agents talking in the background. The supervisor/team-leaders shouting to instruct or enthuse the agents. A nearby gathering in the coffee corner. Such noise reduces the quality of the calls and directly impacts customer satisfaction. In addition the existence of […]
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Echo Cancellation with negative echo tail

  • Posted by admin
  • On May 7, 2017
  • 0 Comments
  • Acoustic Echo Cancellation, echo tail
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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Noise reduction algorithms – PNR vs. RNR

  • Posted by admin
  • On January 3, 2017
  • 0 Comments
  • Noise Cancellation, noise reduction software
Background Recently SoliCall introduced the reference-based noise reduction (RNR). This new technology was added to our noise reduction portfolio which already contained profile-based noise reduction (PNR) and standard noise reduction.  Following the RNR introduction, we got requests to elaborate on the difference between PNR and RNR as they both use a profile/learning mechanism. In this […]
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Analyze the echo path yourself

  • Posted by admin
  • On September 4, 2016
  • 0 Comments
  • echo path, echo tail
Background The echo path is one of the most critical component during echo cancellation.  You might have already heard this term or any of its synonyms (e.g. “echo tail”). When discussing the echo path we usually talk about two different aspects: a. The stability of the echo path. How volatile is this parameter ? Is […]
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Time manipulation and its impact on echo cancellation

  • Posted by admin
  • On July 1, 2016
  • 0 Comments
  • echo cancellation, time manipulation, WSOLA
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
  • 0 Comments
  • Acoustic Echo Cancellation, PJSIP
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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Isolating the audio in VoIP networks

  • Posted by admin
  • On March 2, 2016
  • 0 Comments
  • Firewall, RTP, SIP, VoIP
Background In this post we would like to share with you a rare phenomenon we have seen in few sites that once it appears, it can cause a head ache to the network administrator. As opposed to the old telephony networks that was based on dedicated physical cables per call, usually twisted pair, the cables […]
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How can echo suppression badly impact call quality ?

  • Posted by admin
  • On January 1, 2016
  • 0 Comments
  • echo suppression
Background Can phones/soft-phones with built-in echo suppression badly impact the audio quality? Surprising as it may sound the answer is positive. In other words, when a call center, or any other organization, purchase phones with built-in echo suppression it is jeopardizing the overall call quality.  In order to analyze the reason for this phenomena we […]
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