Think back to the handful of new audio codecs that have been released over the past few years; CELT, SILK and Opus to name a few. Then there are the handful of proprietary codecs that have become available under more attractive licenses. Polycom’s Siren family come to mind on that front. In all of these cases I have observed that the Freeswitch development team are typically amongst the very first to implement any new codec.
In recent weeks they have added support for G.719, an ITU standard codec created by Polycom and Ericsson. With a sample rate of 48 KHz, G.719 is a full-bandwidth codec, supporting a useful audio channel of 20 Hz- 20 KHz. It does so with end-to-end delay of only 40 ms and at bit rates from 32 kbps to 128 kbps. It also supports stereo audio.
Upon completion of the ITU standards process Polycom published a white paper on the codec; G.719: The First ITU-T Standard for Full-Band Audio (pdf).
Continue reading “Freeswitch En Route To Support For G.719 Codec”
This past week Junction Networks phone lab posted a review of the Polycom VVX-1500 Business Media Phone. They make note of the devices’ many fine qualities. The VVX is truly a joy to use. It’s build quality is outstanding, and you simply won’t find a better sounding phone anywhere.
That said, I remain curious about the use of one-on-one video calling. It’s remains unclear to what extent companies are making use of desktop video calling. It’s not the kind of this that springs up organically since one must first seed the organisation with a number of suitably capable phones.
I wonder if this tends to happen within companies that are already making use of traditional video conference installations? Do the Business Media Phones merely extend the reach of such facilities to to the desktop or SOHO users? Or are desktop video phones something completely different?
If you make use of such devices please leave a comment about your experience.