rtp clarifications needed

Discussion in 'VOIP' started by John, Dec 14, 2005.

  1. John

    John Guest

    Hi,
    i am a student and learning to implementing and
    understanding rtp.

    i am going thru the rtp code.

    i got the logic in computing inter arrival jitter
    (usual way as it is done in the rfc)

    int transit = arrival - r->ts;
    int d = transit - s->transit;
    s->transit = transit;
    if (d < 0) d = -d;
    s->jitter += (1./16.) * ((double)d -
    s->jitter);


    what units is it in ?. timestamps or milliseconds.

    i want to know how playout delay is computed (when
    should be the next packet be played).

    how jitter is used for this ?. can it be used ?.


    How is the playout time computed from jitter


    Please Advice,


    Regards,
    James
    John, Dec 14, 2005
    #1
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