IDCT
Inverse Discrete Cosine Transform.


IEEE (Institute of Electrical and Electronics Engineers)
The Institute of Electrical and Electronics Engineers (IEEE) is the world's largest technical professional society.
    Founded in 1884 by a handful of practitioners of the new electrical engineering discipline, today's Institute includes 46,000 students within a total membership of nearly 320,000 members who conduct and participate in its activities in 150 countries. The men and women of the IEEE are the technical and scientific professionals making the revolutionary engineering advances which are reshaping our world today. And today's students are the future of the profession.
    The technical objectives of the IEEE focus on advancing the theory and practice of electrical, electronics and computer engineering and computer science. To realize these objectives, the IEEE sponsors nearly 800 Student Branches worldwide, as well as scholarships and awareness programs, technical conferences, symposia and local meetings; publishes nearly 25% of the world's technical papers in electrical, electronics and computer engineering; and provides educational programs to keep its members' knowledge and expertise state-of-the-art.


IMDCT
Inverse Modified Discrete Cosine Transform.


Intensity stereo
A method of exploiting stereo irrelevance or redundancy in stereophonic audio programmes based on retaining at high frequencies only the energy envelope of the right and left channels.


ISO
The International Organization for Standardization, ISO, in Geneva is the head organization of all national standardization bodies. Together with the International Electrotechnical Commission, IEC, ISO concentrates its efforts on harmonizing national standards all over the world. The results of these activities are published as ISO standards. Among them are, for instance, the metric system of units, international stationery sizes, all kinds of bolt nuts, rules for technical drawings, electrical connectors, security regulations, computer protocols, file formats, bicycle components, ID cards, programming languages, International Standard Book Numbers (ISBN). Over 10,000 ISO standards have been published so far and you surely get in contact with a lot of things each day that conform to ISO standards you never heard of.
     By the way, ISO is not an acronym for the organization in any language. It's a wordplay based on the English/French initials and the Greek-derived prefix iso- meaning same.
    Within ISO, ISO/IEC Joint Technical Committee 1 (JTC1) deals with information technology.


ITU (International Telecommunication Union)
The ITU is a world-wide organization within which governments and private sector coordinate the establishment and operation of telecommunication networks and services; it is responsible for the regulation, standardization, coordination and development of international telecommunications as well as the harmonization of national policies.
    The ITU goal is to foster and facilitate the global development of telecommunications for the universal benefit of mankind, through the rule of law, mutual consent and cooperative action.