Voip Think- Voice over IP - Asterisk and SER - SIP IAX and H323

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      Codecs  

     
        Summary table   G.711 codec process   Audio samples   New codecs G.711.1 -G722.2--G729.1      
     

     
    Audio samples

    In this page you could hear some codec samples to compare the quality. When the sampling rate is higher the quality is worse. On the other hand, the sampling rate reduces the bandwidth necessary to send the information and therefore the delays.

    5 seconds sample:

    [.WAV] G.711 - 64 kbps
    [.WAV] Intel/DVI ADPCM codec - 32 Kbps (very similar to G.721)
    [.WAV] GSM codec - 13.2 Kbps
    [.WAV] LPC10 codec - 2.4 Kbps

    25 seconds sample:

    [.WAV] G.711 - 64 kbps
    [.WAV] Intel/DVI ADPCM codec - 32 Kbps (very similar to G.721)
    [.WAV] GSM codec - 13.2 Kbps
    [.WAV] LPC10 codec - 2.4 Kbps
    .

    Thanks to Hawk Software project. You could find the information in http://www.hawksoft.com/hawkvoice/codecs.shtml

     

     
     
     
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