Televisio

Televisio is a system for transmitting moving images and sound to a receiver, enabling people to view programs at a distance. It is used for broadcast, cable, satellite, and internet-delivered content. The term televisio is used in several languages as the equivalent of television, derived from tele- distant and vision.

In a typical televisio system, a camera or other source captures a scene as a sequence of video signals; these signals are encoded, modulated, and transmitted through terrestrial broadcast, satellite links, cable networks, or IP networks. A receiver tunes the channel, decodes the signal, and controls a display, producing a picture and synchronized sound. Modern systems rely on digital encoding, compression, digital multiplexing, and IP transport. Displays include CRTs, LCDs, LEDs or OLEDs, with varying aspect ratios and resolutions (from standard definition to high definition, 4K and beyond).

The development of televisio began in the early 20th century with experiments by inventors such as John Logie Baird, Philo Farnsworth, and Vladimir Zworykin. Public broadcasts began in the 1930s, with color television following in the 1950s. In recent decades, the medium transitioned from analog to digital broadcasting, paired with on-demand streaming and internet-connected devices. Today, televisio is delivered through broadcast networks, satellite, cable, and streaming services, often integrated with smart TV platforms and other home entertainment ecosystems. It remains a major channel for news, entertainment, education, and cultural exchange, while also adapting to new formats, standards, and business models.