Video/audio signal real-time transmission device

Abstract

The invention discloses a video / audio signal real-time transmission device, which comprises a processor, a standard video / audio input interface, a video / audio acquisition board, a dialing and channel detection system, a 3G communication device, an SIM card slot and an SIM card. The processor is connected with the standard video / audio input interface, the video / audio acquisition board, the dialing and channel detection system, the 3G communication device and the SIM card slot; the SIM card is a built-in SIM card; and the SIM card is inserted into the SIM card slot.

Description

technical field [0001] The invention relates to a video and audio signal transmission device, in particular to a video and audio signal real-time transmission device. Background technique [0002] In the field of live TV broadcasting, the live TV system mainly includes a TV broadcast van and a live TV service station; its working principle is: the cameras are placed in different positions on the scene, and the original TV signals output by the cameras are transmitted to the TV broadcast truck through cables After the TV OB vehicle processes the received original TV signal, it sends it to the microwave transmitter erected on the commanding height; after the microwave transmitter modulates the received TV signal, the microwave transmitting antenna directly transmits the electric wave to the TV mounted on the The microwave receiving equipment on the roof of the live broadcast service station sends the demodulated signal to the live TV service station, and the live broadcast is ...

AI Technical Summary

Problems solved by technology

The above-mentioned live TV system mainly has the following defects: (1) Highly limited by space: due to the large size of the TV OB van, it is limited by many factors such as traffic conditions, power supply guarantee, parking position, and the length of the connection between the parking space and the camera.

(2) Highly limited by time: the TV OB vehicle must apply for satellite transmission channels in advance, so as to be able to transmit real-time signals to the event site and realize live broadcast

(3) High investment cost: TV OB vehicles usually cost tens of millions of yuan, and because of the use of satellite communications, communication costs are very expensive

(4) The use of equipment is complex: the use of satellite OB vehicles not only involves more than a dozen technicians, but also requires several professionals such as on-site directors, subtitles, video playback, and cameras. The team is huge, the division of labor is meticulous, and the operation is complicated. must also have a power source

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