Multisystem digital television signal front end processing device and digital television broadcasting system

Abstract

The invention discloses a multisystem digital television signal front end processing device and a full-digitalization digital television broadcasting system, which solve the problem that the updated television cannot be compatible with the prior satellite television system. The technical scheme comprises that: the device comprises a plurality of different systems of front end decryption modules and a plurality of QAM modulators, wherein the front end decryption modules demodulate and descramble the received different systems of digital signals, and output the descrambled TS stream; and the QAM modulators demodulate the input TS stream according to a QAM mode and output RF signals after each QAM modulator is connected with the front end decryption modules. The device and the system are applied in the field of digital televisions.

Description

technical field [0001] The present invention relates to a digital TV signal front-end processing device and a digital TV playback system including the front-end processing device, in particular to a front-end processing device with multi-standard digital TV signals and a digital TV playback system including the front-end processing device . Background technique [0002] The currently popular method of watching digital TV through a set-top box actually only solves the problem of how to watch digital TV through traditional analog TV, such as figure 1 However, since the output signal processed by the set-top box is an analog signal, what the user watches is not a real digital TV. [0003] figure 2 Shows the structure of a traditional analog TV broadcasting system in a hotel. See figure 2 , the hotel equips each TV set 13 with a satellite set-top box 10 separately. The satellite set-top box 10 receives the DVB-S satellite TV signal, converts it into an analog signal, modu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the above problems. It provides a multi-standard digital TV signal front-end processing device, which truly realizes that the whole process from transmission to decoding is a digital signal, and solves the problem that the digital TV cannot be compatible with the original satellite after upgrading the digital TV. TV system problem

[0006] Another object of the present invention is to provide an all-digital digital TV playback system, which is equipped with a multi-standard digital TV signal front-end processing device, which truly realizes that the whole process from transmission to decoding is a digital signal, which solves the problem of upgrading The problem that the digital TV cannot be compatible with the original satellite TV system

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