In this era of rapid technological change, it is widely recognized that international standardization and coordinated planning for the introduction of new systems and services assume critical importance. The rapid acceleration in the work leading to the introduction of advanced television systems such as HDTV provides an important example in the way in which the CCIR has responded to the challenge of change through the identification of the processes and decision-making mechanisms necessary to produce timely and coordinated action for the development of HDTV studio, emission and transmission standards. This report contains the conclusions of the ITU's Extraordinary Meeting of Study Group 11 on High-Definition Television.