Teletext and Viewdata Costs as Applied to the U.S. Market

The prime aim of the Teletext and Viewdata systems in the UK has been to create a significant new market in the home for digital systems based around the domestic colour tv set. To achieve a major penetration of the market, particular attention was taken in formulating the systems specification to achieve simplicity for user operation and minimum decoder costs. At the same time, considerable degrees of freedom have been retained for future evolution without making existing decoders obsolete.