WebRTC Acoustic Echo Cancellation on PJSIP

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Echo, unless you’re in a karaoke pub, is very annoying.

Over the years we have added support for various echo suppression and cancellation algorithm and libraries, like Speex and bdIMAD.

WebRTC, besides being a communications protocol on its own right, contains a powerful media component which in turn contains, among other things, acoustic echo cancellation algorithm implementation.

Try pjsip using WebRTC AEC on the development code by following the usage notes.

Eventually this will form part of 2.5 release (before you ask, no, we don’t have a definite timeframe for it).

Originally posted on http://blog.pjsip.org

PJSIP version 2.4.5 is released with support for video capture orientation

PJSIP version 2.4.5 is released with main focus on support for video capture orientation.

As usual the release also includes several enhancements and bug fixes, please see the Release Notes page for more info and grab the source code from the Download page.

PJSIP version 2.4 is released with video on Android and updated bdIMAD echo cancellation

PJSIP version 2.4 is released with main focus on video on Android, which includes a capture device using android.hardware.Camera and a renderer using OpenGL ES 2. We also updated the support for version 2.0.0 of bdIMAD, a multi-platform Speech Quality Enhancement solution including full-duplex Acoustic Echo Canceller and Speech Processor for applications based on PJSIP.

As usual, the release also includes several enhancements and bug fixes, chief among these are stability improvement of iOS video. Please see the Release Notes page for more info and grab the source code from the Download page.

PJSIP Version 2.3 is Released with Video on iOS

PJSIP version 2.3 is released with main focus on video on iOS, which includes native capture using AVFoundation, native preview, and a choice between two renderer backends: OpenGL ES 2 or UIView. We also add support for OpenH264 and Libyuv as alternative to FFmpeg/Libav in providing H.264 video codec and image converter functionalities.

As usual the release also includes several enhancements and bug fixes, please see the Release Notes page for more info and grab the source code from the Download page.

PJSIP version 2.2.1 is released

PJSIP 2.2.1 is released which mainly contains bug fixes for 2.2. For the complete list, have a look at the Release Notes.

We would recommend anyone using 2.2 to upgrade to this version. Please see the download page as usual for more info.

PJSIP Version 2.2 is Released with New API for C++, Java, and Python

PJSIP version 2.2 is released, with the focus on new PJSUA2 API, an Object Oriented API for C++, Java/Android, and Python. See the new PJSUA2 Book, a comprehensive tutorial/documentation specifically for this API, for more info.

Also Android is now supported. Apart from these, we added support for 64bit Windows, third party echo canceller for Android, iOS, Windows, etc, and closed over a hundred tickets on this release. See the Release Notes for 2.2 for more info, or head straight to the Download page to get the source code.

PJSUA2 API under development

Apparently a lot of you follow the main codebase, as we’re getting lots queries about a new feature:

Recently we merged the branch where we were developing a new object-oriented wrapper to PJSUA API, imaginatively called PJSUA2.

We’re still fine tuning it, trying to make it as seamless as possible on all platforms. Compiling is a bit more complex now, with more tools such as SWIG.

We’re also preparing brand new documentation to go along with it: PJSUA2 API draft documentation.

So for those who like their code fresh, please have a play, but bear in mind it’s not quite polished yet!


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