Broadcast television signal transmitting method, system and device

Abstract

The invention discloses a transmitting method, a system and a device of radio and television signals, thereby reducing the noise of high frequency carrier waves which contain the radio and television signals and are transmitted by a base station and improving the covering effect of the radio and television signals. The transmitting method of the radio and television signals comprises: the base station converts the high frequency carrier waves which contain the radio and television signals and are transmitted by a radio and television transmission device to digital signals; the base station carries out the delay treatment of the digital signals; the base station converts the digital signals after the delay treatment to analog signals and transmits to a user terminal.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system and device for transmitting broadcast television signals. Background technique [0002] In order to achieve large-area signal coverage of TV broadcast signals, the existing technology generally uses multiple base stations to transmit broadcast TV signals synchronously at the same frequency. It is often necessary to control the time delay of the carrier signal containing the broadcast TV signal transmitted by each base station, so as to ensure that the time of transmitting the carrier signal containing the broadcast TV signal of each base station is exactly the same. [0003] like figure 1 As shown, the transmission process of broadcast television signals in the prior art includes: [0004] The radio and television transmission equipment transmits the radio and television signals to each base station, and each base station obtains the high-frequen...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the existing technology uses analog signal processing technology in the entire transmission process of broadcast TV signals, and analog signal processing technology cannot remove noise. The time delay processing of the high-frequency carrier f0 of the base station will cause the degradation of the carrier-to-noise ratio of the high-frequency carrier containing the broadcast signal transmitted by the base station, and with the increase of the distance between the base stations and the number of relay stations, the high-frequency carrier containing the broadcast TV signal The carrier noise figure of f0 will continue to increase, which will affect the coverage of broadcast TV signals

[0006] To sum up, the high-frequency carrier containing radio and television signals transmitted by the base station in the prior art has relatively large noise, which affects the coverage of radio and television signals

Images