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International Telecommunication Union
The International Telecommunication Union, or ITU, is the leading United Nations agency for information and communication technologies. As the global focal point for governments and the private sector, ITU's role in helping the world communicate spans 3 core sectors: radiocommunication, standardization and development. ITU also organizes TELECOM events and was the lead organizing agency of the World Summit on the Information Society.
ITU is based in Geneva, Switzerland, and its membership includes 191 Member States and more than 700 Sector Members and Associates.
The international standards that are produced by the ITU are referred to as "Recommendations" (with the word ordinarily capitalized to distinguish its meaning from the ordinary sense of the word "recommendation"). Due to its longevity as an international organization and its status as a specialized agency of the United Nations, standards promulgated by the ITU carry a higher degree of formal international recognition than those of most other organizations that publish technical specifications of a similar form.
Notable video related standards include ITU-R BT.601 and ITU-R BT.709 which are the basis of digital television, as well as digital to analog and analog to digital video conversion.