5. Multimedia networks and multimedia streaming (a) In Dynamic Adaptive Streaming over HTTP (DASH), video sequences are compressed in multiple qualities. i) Explain this concept with the help of drawings and illustrate how this can be performed using FFMPEG. (7 marks) ii) Assume you use segments of 20 seconds duration and segments corresponding with the following data-rates are fetched in the first 100 seconds: 300 kbps, 500 kbps, 800kbps, 1Mbps, 2Mbps. Calculate the mean bitrate in the first 100 seconds. (6 marks) (b) Describe the impact of the different transport protocols on multimedia transmission (4 marks) (c) Explain which transport protocol is used for VoIP systems and the rationale for it. (3 marks) (Total 20 marks)