Two-way information interaction method applied in broadcast TV system

Abstract

The invention relates to a two-way information interaction method applied in a radio and television system. The data downlink process includes the following steps: 1) respectively defining a multicast channel and a broadcast channel; 2) performing an interaction process according to the media content to be broadcast processing; 3) mark the interaction information according to the specific application and media content; 4) package, modulate and send the interaction information of broadcast type and multicast type to the broadcast transmission network; Circularly wait for the interactive information, and demodulate the information from the channel according to the different types of information; then the terminal interactive process processing module provides the coordinate position for displaying the interactive information; 6) The information display module displays the interactive information at the designated position of the display device. The invention fully utilizes the advantages of large downlink bandwidth and wide coverage of the broadcasting network, and simultaneously combines the flexibility of the data network to realize the personalized information interaction function of wide coverage.

Description

technical field [0001] The invention relates to the fields of broadcasting and television network systems and cable television network systems, in particular to a two-way information interaction method applied in broadcasting and television systems. Background technique [0002] The traditional radio and television network (broadcast transmission network) system can be divided into two categories: wireless radio and television network system and cable television network system. The geographical range covered by the former depends on the frequency, power, polarization direction of the antenna used by the TV station, the use of omnidirectional or directional antennas, etc., while the latter usually uses backbone optical fibers and access parts within a certain geographical range. Compared with the way of coaxial cable, the geographical range of the former is much larger than that of the latter, but the latter has other advantages, such as better transmission signal quality, ch...

AI Technical Summary

Problems solved by technology

[0005] The information to be transmitted during the playback of the media content is made into a data stream broadcast at a specific time through the subtitle machine, and then the data stream is superimposed with the media content through the modulator, and then sent to the cable TV network through the multiplexer; the terminal passes to the specific time Channel reception is enough. In this case, the terminal does not have the function of two-way interaction

Images