Digital signal processing (DSP) has been an integral part of most electrical, electronic, and computer engineering curricula. The applications of DSP in multimedia (audio, image, video) storage, transmission, and analysis are also widely taught at both the undergraduate and post-graduate levels, as digital multimedia can be encountered in most human daily activities. In this paper, a virtual lab on multimedia systems for telecommunications, medical, and remote sensing applications is presented; consisting of 20 graphical user interfaces, it can support teaching activities for various DSP concepts. The virtual lab developed was used as a teaching companion for a post-graduate course on multimedia content management, to enhancing student comprehension of the material taught; it has been made freely available for similar educational or research purposes.