What is Broadcast HDTV?

Radio and television ( Radio and television ) is a news dissemination tool that transmits sound, images, and video through radio waves or wires. Those who only broadcast sound are called sound broadcasts; those who broadcast images and sound are called television broadcasts. ^[1]

Broadcasting

Is through

First, the propaganda function, which uses the modern

Divided into wireless broadcasting and wired broadcasting according to the transmission mode. Those who only broadcast sound are called "sound broadcasts", referred to as "broadcasts"; those who broadcast images and sounds are called "television broadcasts", "TVs" for short.

1. Visualization: convey information in the form of sound and images. 2. Timeliness: Information is transmitted at the speed of radio wave propagation. 3. Extensiveness: A media with the widest coverage.

The emergence of radio and television is the result of the development of human society and technological progress. It has unprecedentedly expanded the breadth and depth of human information dissemination. Radio broadcasting was invented in 1906. The first official radio station in the world was the KDKA radio station in Pittsburgh, USA, which began broadcasting in November 1920. China's radio broadcasting began in 1923; Yan'an Xinhua Radio officially broadcasted on December 30, 1940, marking the birth of the Chinese People's Broadcasting. Television was invented in the 1920s. In 1936, the BBC established its first television station and officially broadcast the program. The first TV station in China was Beijing TV Station, which was broadcasted on May 1, 1958. It was officially broadcast in September of the same year, and was renamed CCTV in 1978.