Hi Guys,

I need your help with this question in (Data Comunication and Net-Centric).

Task 2a: Alice is making a VoIP (voice over IP) call to Bob.

Draw a complete diagram to show the information flow from Alices end to Bobs end; explain the signal type (analog or digital) on each part. Explain all the devices involved and their functions for making a VoIP call; Discuss how we can get a good voice quality with regard to reasonable cost.

Task 2b: Explore the video and image transmission capability using electronic devices.

Discuss how a color image is represented? Calculate the size of a 640480 pixel image (termed as one frame) with resolution of 3 byte/pixel (assuming no data compression is done). For transmitting such images at a rate of 30 frames/second, calculate the bit rate necessary for real time transmission.

Explore data compression for better use of communication bandwidth.