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Echo in Public Address systems – additional considerations

  • Posted by admin
  • On October 14, 2015
Background This post is a continuation to our previous post on  AEC and Public Address systems. This post elaborates on additional considerations that should be reviewed when implementing and tuning acoustic echo cancellation software in PA systems. After analyzing relevant case studies, out of many important considerations, we have selected the below ones.
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VoIP on Android – volume control

  • Posted by admin
  • On August 3, 2015
Background In our previous posts we covered few of the difficulties that Android VoIP developers are facing – for example the challenge in providing high quality echo cancellation. In addition to the echo cancellation, the variety of hardware platforms that are running Android also introduces a challenge in controlling the volume of the voice.  
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Echo Cancellation on Android and AudioRecord

  • Posted by admin
  • On May 22, 2015
Background When developing a VoIP application, most implementations use AudioRecord as the foundation class for capturing audio from the microphone.  Can this class be used to cancel echo as well ?  
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Profile-Based Noise Reduction

  • Posted by admin
  • On September 9, 2014
Background In this post we will discuss the current status of SoliCall’s innovative and powerful noise reduction technology.  Initially this technology was introduced under the name of personal noise reduction.  Few months later the concept of out-of-the-box deployment with generic profiles was introduced. Recently, we have renamed this technology to “profile-based noise reduction“.
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Echo cancellation and public address systems

  • Posted by admin
  • On July 14, 2014
Background When you hear the words echo or echo cancellation, you probably imagine a scenario in which two people are talking over the phone and one of them hears his/her echo. Indeed this is the most common scenario in which echo appears and echo cancellation mechanisms are being used.  In this post we would like […]
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Personal Noise Reduction – out of the box deployment

  • Posted by admin
  • On May 18, 2014
Background The personal noise reduction software has proven to increase audio quality and MOS score in different noisy environments. This technology is using information on the speaker’s voice in order to separate it from the background noise and attenuate the latter. This powerful technology had one major drawback that prevented it from reaching mass deployment. […]
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Personal Noise Reduction Technology. Altruism or Egoism ?

  • Posted by admin
  • On March 16, 2014
Background In the last post we have discussed the different options for using personal noise reduction in mobile phones. In this post we will elaborate on the expected value from using this advanced technology. Usually, when you purchase a new mobile phone, you are acting to the benefit of one’s self. You want to enjoy […]
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Personal Noise Reduction for Mobile Phones

  • Posted by admin
  • On January 24, 2014
Background The personal noise reduction is a new approach for identifying and removing ambient noise in telephony. As explained in a previous post, the personal noise reduction is superior to any existing approaches for noise reduction. In this post we will discuss different usage scenarios for mobile phones.
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Echo Cancellation, Art or Science? Part V

  • 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.
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Evaluating The Power Of Personal Noise Reduction On Live Calls

  • Posted by admin
  • On October 13, 2013
Background In this post we will describe a simple method for evaluating the power of the innovative profile-based noise reduction technology. This method does not provide optimal professional results but it can be used for preliminary evaluation. Companies that are interested in a more professional evaluation should contact us. In this post we will describe […]
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