Why is Jade TV called TVB, and what does cable TV mean?

In the early days, TV signals basically relied on wireless transmission, and Jade TV still retains wireless microwave signals, which I think is still the old name. Cable TV is a signal transmitted by cable or optical cable, so it is called cable TV.

Emerald Terrace. Affiliation: TV broadcasting**** (wireless TV) what wired and wireless, I don't understand...

Cable TV is a system that uses coaxial cable as a medium to directly transmit TV and FM radio programs to user TV.

Wireless television, also known as terrestrial television, is one of the modes of television signal transmission, as opposed to satellite television. Television stations transmit signals in the atmosphere in the form of radio waves through facilities such as signal transmitters and TV towers, and viewers use antennas to receive the signals for television programmes.

1. Cable TV, also known as cable TV, is developed from wireless TV.

2. Cable TV first appeared in Pennsylvania, USA, in 1950.

3. Cable TV still retains the broadcasting standard and signal modulation mode of wireless TV, and does not change the basic performance of the TV system. Cable TV sends the recorded program to the user through the cable lead (cable or optical cable), and then uses the TV to replay it, without radiating electromagnetic waves into the air, so it is also called closed-circuit television.

4. Cable TV is a type of pay-TV that is paid for by the viewer rather than the funder.

Are you saying what is the difference between wireless TV transmission and cable TV transmission?

1. Wireless TV transmission is transmitted to users through microwave, MMDS, MUDS, etc., mainly satellite (for the whole country and the world), microwave (mainly between the machine station and the station), terrestrial television (mainly for the majority of rural users, urban can also be received).

2. Cable radio and television are transmitted to users through optical cables, coaxial cables and other media, and these transmission media can be seen and touched, while wireless transmission media are invisible and intangible.

The title of the "Radio Administration" you are talking about in the sequence of provincial and municipal departments should be: Radio Regulatory Commission, which is generally under the guidance of the Economic and Audio-Visual Commission. In the national ** department, it is under the direction of the Ministry of Industry and Audio.

Radio and television transmission centers are generally public institutions and are under the industry management of the Radio, Film and Television Bureau.

The main difference between cable TV and wireless TV is the way in which the letter travel number is transmitted and the device in which it is received.

Cable TV transmits signals through a wired cable, which needs to be connected to a TV or set-top box, such as a set-top box, to receive the signal. The advantage of cable TV is that the signal is stable, the picture quality is clear, and it can provide more channels and services.

Wireless TV transmits signals through radio waves, and does not need to connect wired cables, but only needs to use TV antennas or digital TV receivers and other devices within the receiving range to receive signals. The advantage of wireless TV is that it is flexible and convenient, and it can move indoors and outdoors at will, but due to the influence of weather, terrain and other factors, the signal is unstable, and the picture quality may not be as clear as that of cable TV.

Overall, cable TV is suitable for users who need a stable signal and high-quality pictures, while wireless TV is suitable for users who need flexibility and convenience.

Cable television is a radio and television system that uses cable and optical fiber as the main transmission medium to transmit TV to users. At present, cable transmission is mainly used in China, and optical fiber or microwave transmission is only used on ultra-long trunk lines. The system can also transmit FM radio programs at the same time as transmitting television programs.

Cable Television is cable television in English, abbreviated as catv, and some people literally translate it as cable television.