New digital broadcasting services for use with TV sets containing digital storage devices

This paper describes two novel broadcasting services for providing high quality digital video transmissions using the MPEG-2 encoding standard. While image quality in conventional MPEG-2 broadcasting is limited by the available transmission capacity, we propose using TV sets with digital storing devices to create a much higher virtual bandwidth that allows for high quality transmissions. Furthermore, both services are backward compatible, that is ordinary TV sets without such storage devices will still be able to receive regular program, although at a lower quality.