The group's principal activities are to develop, manufacture and market digital video compression and decompression hardware and software. These are used for entertainment, commercial and educational applications. The group markets and develops products and technologies in the digital video arena. The group's products primarily include digital versatile disc products, such as DVD loaders, DVD sub-systems and components. The group also markets and develops video CD players, networked video servers that provide near video-on-demand, digital ad-insertion systems that automatically insert digital video commercials into broadcasting programs and video players for commercial kiosk applications.