January 22, 2022
Television and radio broadcasting is the distribution of audio or video content to a scattered audience through any electronic medium of communication. Television and radio broadcasting gained popularity after 1920. The term was created to describe the dissemination of information to a wide audience. Until then, all forms of electronic communication (the first radio, telephone, telegraph) sent messages that were intended for only one recipient. Currently, this area includes public as well as private TV and radio stations. Anyone with the appropriate equipment (such as a radio or TV) can receive the signal. Most countries require a license to broadcast programs from radio or television stations to home receivers. History of speech Telegraph signals were the first to be broadcast, using the Morse code, a system developed in the 1830s by Samuel F.B. Morse. It was a telegraph alphabet (a system for encoding symbols with short and long signals to transmit them over communication lines). This was especially important for communication between ships, as well as for communication from ship to shore. However, this later became important for business and general news. In the early 1920s, broadcasting began to spread first on the AM band and then on the FM band. Television broadcasting gained widespread popularity after World War II. Satellite broadcasting dates back to the 1960s. Initially, all broadcasts consisted of analog signals, but in the 2000s, companies switched to digital signals using digital transmission.