A. When we stream stored audio/video, what is the difference between the first approach and the second approach B. When we stream stored audio/video, what is the difference between the second approach...

A. When we stream stored audio/video, what is the difference between the first approach and the second approach

B. When we stream stored audio/video, what is the difference between the second approach  and the third approach ?

C. In the fourth approach to streaming audio/video, what is the role of RTSP?

D. In transform coding, when a sender transmits the M matrix to a receiver, does the sender need to send the T matrix used in calculation? Explain.