Augmented reality is a technique which superposes a virtual model on our perception of reality, in real time. This system can be applied to visual perception, by superposition of a virtual image on a real image, as well as on auditive, tactile or other perceptions.

DVB is a family of European digital television standards, used in Europe and in many countries in the world.

DVB is divided into several standards according to the field of application:

• DVB-T (DVB -Terrestrial) for digital terrestrial television.
• DVB-H (DVB-Handheld) for mobile TV.
• DVB-SH (DVB- Satellite Handheld) for mobile TV broadcast by satellite.
• etc.

Modeled on FTTx (Fiber To The ...), FTTA does not refer to an optical fiber technology but rather very high-speed wireless technology, whose performance is comparable to FTTx technologies.

FTTH technology aims to supply high-speed services by installing optical fiber all the way to the subscriber, particularly in urban areas.

By extension, FTTx (Fiber to the ...) is used to refer to technologies that consist in taking the fiber as near as possible to the user: FTTN (Fiber To The Neighborhood) at the neighborhood level, FTTN (Fiber To The Node) up to the splitter, etc.

HDTV is a digital television technique allowing the display of high quality images. Compared to the SD (Standard Definition) format of analog television, the HD format offers a definition at least twice as good, a better sound quality and new possibilities of services.

ICT refers to all the techniques used to process and transmit all types of information (data, sound, images) and for all types of service (data processing, telephony, television, Web).

IMS is a standardized architecture for the supply of advanced multimedia services, both fixed and mobile. IMS really converges Internet and the world of mobile phones. It uses cellular technologies to provide access everywhere, and the Internet technologies to provide the services.

IP is the communication protocol used on Internet. It was first popularized by the intensive use of services such as e-mail, file transfer and surfing on the Web. With the generalization of broadband, all communication services can be transported over the IP network: ToIP (IP telephony), VoIP (voice over IP), IPTV (Internet Protocol Television).

IPv6 is the successor to the IPv4 protocol that the Internet was built on. Designed to extend the limits of IPv4 in terms of addressing, IPv6 introduces other improvements, including the possibility of managing the constraints of quality of service.

An NGN is a network that transports all information and services while remaining flexible and evolutive. It is compatible with all the new technologies: transfer in packet mode, multiple broadband, multiple access, generalized mobility, etc.

The user interface of a "Rich media" service uses different media – sound, video, visuals, text – to improve the service in terms of user-friendliness and interactivity.

Virtual reality reproduces, by computer simulation, a real or imaginary environment in which the user is immersed. He uses tools to interact with the environment that he perceives by means of diverse sensations: visual, audible, tactile or proprioceptive.

WiMAX is a family of high-speed connection standards broadcast on hertzian frequencies. They provide connections at a speed of several tens of megabits per second over a radius of some tens of kilometers.