In this thesis the statistical characteristics are investigated for various Discrete Cosine Transform (DCT) coders. They are intraframe DCT, frame difference (FD) DCT and displacement frame difference (DFD) DCT.
The measured statistics are mean, variance, correlation coefficient, deviation to average ratio (DAR) and peak to average ratio (PAR) for different sizes in quantizer step and buffer. It is found that as the quantizer step size increases, the mean and variance of output bit rate become smaller, while DAR becomes larger. Also, As the buffer size increases, i.e. the observation interval increases, the burstiness of coded data volume decreases.
Through the queuing simulation based on the Discrete Time Markov Chain (DTMC) model the multiplexing characteristics are measured for packet video system. Considered are the packet loss rate, the equivalent bandwidth and the multiplexing gain. It is shown that the multiplexing gain is larger in interframe coding than in intraframe coding, and that it is larger as the step size of quantizer is larger in interframe coding.
