The ITU Radiocommunication Assembly considering a) that the development of broadcast, and non-broadcast, television systems is being widely undertaken, and, with their development, new levels of potential image quality are available; b) that with the development of new image transmission and presentation technologies in broadcast and non-broadcast television, television system parameters can be chosen on the basis of compromises between image quality and the cost of image transmission and presentation; c) that for the definition of the requirements for television systems and their parts the potential level of image quality to be provided by these systems is an important element; d) that Recommendation ITU-R BT.1127 proposes image quality levels for HDTV, EDTV, SDTV and LDTV for TV broadcasting services, and draft ITU-T Recommendation P.911 proposes image quality levels TV0-TV5, MM0-MM5 for multimedia communication applications, and it would be valuable to have a single unified classification of the image quality levels for broadcast and non-broadcast television, transmitted in TV and multimedia environment; e) that in the MPEG-1, MPEG-2 and MPEG-4 specifications, methods of video compression providing any levels of image quality are available; f) that use of digital methods of image processing allows a flexible trade-off of image quality, bit rate and complexity of hardware and software; g) that new technologies make possible to build of a unified basis for the systems, providing different levels of quality of image transmission - from high resolution imagery to multimedia images transmitted, for example, as a sequence of still pictures, with near zero frame rate; h) that in future the designers and users of TV systems and TV equipment will be interested in the levels of quality, provided by TV systems under development and in operation.