Transmitting the rtp stream

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Reference no: EM1323043

Consider that a sender transmits a silence suppressed the RTP stream of G.711 audio to the receiver (G.711 refers to the name of standard for 64Kbps PCM we discussed in class). At a talk spurt 20 m secs chunks of quantized audio samples are encapsulated into the packets and transmitted to the receiver (every 20 m secs). Justify your answers for the following:

a) How many samples are involved in each packet?

b) If RTP time stamp is initialized to the zero, and if the first talk spurt consists of the three or more packets, explain the RTP time stamps of first three packets in the first talk spurt.

c) Let the last packet in the talk spurt and the first packet in the immediately following talk spurt. Does the difference of the RTP timestamps of these packets depend upon the length of silence period between the two talk spurts?

d) If last two packets received at the receiver have the timestamps of 0 and 480 and corresponding sequence numbers of 1 and 3 (i.e. packet 2 is lost), are these last two packets in same talk spurt or in different talk spurts?

e) Outline an algorithm which utilizes the sequence numbers and time stamps of RTP packets to calculate the beginning of a new talk spurt?

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