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Richard Thorpe's avatar
Richard Thorpe
Copper Contributor
Jun 15, 2021

Audio/video codecs by ACS

Hi there, do you have any detailed information on the audio and video codecs used by ACS when embedded in a website/JS. Including maximum bitrate if possible

    • Richard Thorpe's avatar
      Richard Thorpe
      Copper Contributor
      Thanks Nikolay,

      My understanding is that G.722 offers an audio sample frequency of 16kHz which results in a maximum 8kHz output. SILK, I believe, was as a result of the Skype acquisition in 2011 which created super-wideband audio capable of reproducing 12kHz from a 24kHz sampled frequency.

      The exciting part of the MS proprietary "Satin" codec was that whilst it currently provides 16kHz output from a 32kHz sample frequency, it was mentioned that in the coming months this would be increased to provide 'full-band' audio at 48kHz. A standard CD has a 44.1kHz sample frequency, so this update would significantly improve audio output. Currently, competitors such as Zoom are already offering this quality so I'm keen to understand when we can become competitive?
      • Nikolay Muravlyannikov's avatar
        Nikolay Muravlyannikov
        Icon for Microsoft rankMicrosoft
        Thanks. We are working on adding more codecs in upcoming quarter. I noted the level of details you want to have in the documentation. We will get these details in docs
    • Richard Thorpe's avatar
      Richard Thorpe
      Copper Contributor
      Hi Nikolay,

      Thanks for getting back to me so quickly. Unfortunately the link doesn’t talk to maximum bitrate only required bandwidth, do you have any more specifics?
      Also, do you know when ACS will use the Satin codec recently introduced by Teams? - my thought process being that I presumed they were powered by the same engine

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