of k may be adjusted by controlling the size of the ip udp rtp datagram the value of k may be selected in a trade off as follows to reduce the impact of a corrupted frame the value of k should be chosen as small as possible thus small k means reducing the datagram size with respect to the frame size however a small k has the disadvantage of bearing the load of a large ip udp rtp header overhead for example a typical ip udp rtp datagram has a 40 byte header which may be shared by k frames if k is chosen to be a small value the 40 byte header may be distributed among a small number of frames however if k is chosen to be a large value such as 10 the 40 byte header may be distributed among 10 frames in this case each frame would carry a header with only about 4 bytes as mentioned above since the idu size matches the resultant value of k times the frame size adjusting the idu datagram size may be equivalent to finding a suitable value for k this suitable value of k e g k may be defined as the number of frames per idu that maximizes the actual uncorrupted throughput the definition of the u201c actual uncorrupted throughput u201d may be defined as the rate of uncorrupted data excluding headers suppose c represents the ideal throughput with no errors and no headers using p e d as the idu error rate f as the frame size h as the idu header size l as the maximum number of retransmissions allowed and k as the number of frames encapsulated in one idu the actual uncorrupted throughput may be.