calculation of voice codec

convenientstoreconvenientstore Member Posts: 53 ■■□□□□□□□□
can someone tell me how this works out to 8 kbps? This is from Cvoice book from ciscopress.. Just don't understand how they arrive at 8 kbps

The G.729 codec using two 10-ms samples consumes 20 bytes per frame, which works out to 8 kbps.

Comments

  • mikej412mikej412 Member Posts: 10,086 ■■■■■■■■■■
    Check Voice Over IP - Per Call Bandwidth Consumption

    I think you're looking for this formula:
    codec bit rate = codec sample size / codec sample interval
    remember your 8 bits per byte and puzzle out the "common units conversion" of ms to seconds

    Are you using the new CVOICE Exam Certification Guide?

    I remember a good explaination somewhere in the "old books" -- not sure about those new-fangled updated books that hint at the exams in the titles icon_lol.gif
    :mike: Cisco Certifications -- Collect the Entire Set!
  • convenientstoreconvenientstore Member Posts: 53 ■■□□□□□□□□
    this is exactly what I was looking for.

    Just bit suprised that these book do not have them.
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