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HELP ME PLEASE

  • 17-12-2009 03:52PM
    #1
    pete_mcs
    Registered Users, Registered Users 2 Posts: 122 ✭✭


    Can some one please help me with this question, its for a college assignment.
    In a audio conferencing system each persons speech is sampled 4000 times per second and 256 quantisation levels are used for each sample When one person speaks for 3 seconds how much data is sent?


Comments

  • #2
    cpu-dude
    Closed Accounts Posts: 1,089 ✭✭✭cpu-dude


    pete_mcs wrote: »
    Can some one please help me with this question, its for a college assignment.
    In a audio conferencing system each persons speech is sampled 4000 times per second and 256 quantisation levels are used for each sample When one person speaks for 3 seconds how much data is sent?
    96000 bits.

    2^8 = 256, so the quantization levels can be represented using 8 bits. At 4khz sampling rate, you'd have:

    8 bits/sample x 4000 samples/s = 32000 bits/s x 3 seconds = 96000 bits.


  • #3
    pete_mcs
    Registered Users, Registered Users 2 Posts: 122 ✭✭pete_mcs


    Thank you cpu-dude.


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