scope:

This Recommendation describes user requirements for the specifications, design, and testing of systems for the transmission of television signals through contribution, primary distribution and SNG networks.

The ITU Radiocommunication Assembly,

considering

a) that contribution, primary distribution, and satellite news gathering (SNG) networks are essential for broadcasting operations and provide a valuable method of transmission for rapidly acquiring and broadcasting events;

b) that Report ITU-R BT.2069 − Spectrum usage and operational characteristics of terrestrial electronic news gathering (ENG), television outside broadcast (TVOB) and electronic field production (EFP) systems, provides specifications for broadcast auxiliary services (BAS);

c) that the use of SNG and the technical and operational characteristics for SNG are defined in Recommendations ITU-R SNG.770, ITU-R SNG.771 and ITU-R SNG.1007;

d) that the system characteristics of TVOB, ENG and EFP in fixed services and mobile services are specified in Recommendations ITU-R F.1777 and ITU-R M.1824;

e) that user requirements for video bit-rate reduction coding of digital TV signals for an end-to-end television system, with respect to picture formats, coding schemes, and picture quality have been specified in Recommendation ITU-R BT.1203;

f) that coding algorithms using bit-rate reduction techniques for television signals have been devised to enable such transmission to be effective, with the aim of maximizing efficiency and resources;

g) that television signals should be transmitted with minimum impairments;

h) that general advice on methods of assessment and subjective evaluation are defined in ITU-R Recommendations;

j) that such assessment will need to take into account the basic picture and sound quality, failure characteristics when there are errors in the transmission link, and the quality achieved after downstream processing;

k) that both the design of codecs and their assessment will need to take into account user requirements;

l) that to be complete, the user requirements should specify the test procedures and test material that should be used to check whether the requirements are being met,

recommends

that the following user requirements should be applied for the specifications, design, and testing of systems for the transmission of television signals through contribution, primary distribution and SNG networks as part of the broadcasting chain.