The spate in popularity of multimedia applications
has led to the need for optimization of bandwidth allocation
and usage in telecommunication networks. Modern
telecommunication networks should by their definition be able to maintain the quality of different applications with different Quality of Service (QoS) levels. QoS requirements are generally dependent on the parameters of network and
application layers of the OSI model. At the application layer QoS depends on factors such as resolution, bit rate, frame rate, video type, audio codecs, etc. At the network layer, distortions such as delay, jitter, packet loss, etc. are introduced. This paper presents simulation results of modeling video streaming over wireless communications networks. The differences in spatial and time characteristics of the different subject groups
were taken into account. Analysis of the influence of bit error rate (BER) and bit rate for video quality is also presented.
Simulation showed that different video subject groups affect
the perceived quality differently when transmitted over
networks. We show conclusively that in a transmission network
with a small error probabilities (BER = 10-6, BER = 10-5), the
minimum bit rate (128 kbps) guarantees an acceptable video
quality, corresponding to MOS > 3 for all types of frames