Influence of Noise on IPTV over xDSL

This paper focuses on the impact of impulse noise on picture quality in IPTV service provided over access networks based on ADSL/ADSL2+ technology. Impulse noise is a non-stationary stochastic electromagnetic interference which consists in random occurrences of energy peaks with random amplitudes. The source of impulse noise can be the electromagnetic radiation from power cables, high-voltage power lines, power switching and control, and electrical discharges. The impulse noise, which is characterized by its short duration, is composed of peaks. These peaks occur in bursts, which cause so-called block errors in transmitted data.