Universal Mobile Telecommunications System) is a 3 rd generation communication system that uses WCDMA access technology (Wideband Code Division Multiple Access) to obtain high data rates and ensure better quality of multimedia communications. MPEG-4 (Moving Picture Experts Group) is widely used for video transmission services on any network because of the good quality of service it provides. UMTS has several radio channels for transporting data to and from these mobile users. This article focuses on a comparative study between the DCH channel (Dedicated Transport Channel) and the HS-DSCH channel (High Speed Downlink Shared Channel) by analyzing the qualities as packet loss, bit rate, throughput, transmission delay, availability, jitter, etc. offered by each of them in order to determine the suitable video transmission