Dr Sadka has over 40 publications in peer-refereed journals and international conferences and several contributions to specialised books in the area of video coding and mobile video communication systems. He and his students have pioneered work on error resilience in video communications, video transmissions over packet networks and video transcoding for inter-network communications for the last 9 years. He provides consultancy to numerous companies in the UK Telecommunications industry, on several areas related to multimedia communications. He oversees the video research activity in the multimedia communications group at the University of Surrey and has a filed UK patent in the area of video transport over networks.