dvb conditional receiving device integrating basic data and normal data descrambling

Abstract

The invention relates to a DVB (Digital Video Broadcasting) condition receiving device capable of descrambling integrated basic data and normal data. The DVB condition receiving device comprises a demultiplexer, a controller, an unpacking module and a descrambling module, wherein a transport stream TS received by the demultiplexer comprises basic data and normal data with different acquisition rates and the same program content, and the demultiplexer, the unpacking module and the descrambling module sequentially carry out the demultiplexing, unpacking and descrambling operation on the received transport stream; and the controller is connected with the descrambling module and receives user priorities so as to start up the basic data descrambling operation or normal data descrambling operation according to different user priorities. By the adoption of the DVB condition receiving device capable of descrambling integrated basic data and normal data provided by the invention, two data contents of different resolutions can be received at a receiving end, two descrambling methods of different degrees of difficulty can be integrated at the receiving end, and the two data contents and the two descrambling methods respectively correspond to each other so as to adapt to the watching demand of different user groups at the receiving end for digital TV programs.

Description

technical field [0001] The invention relates to the field of digital television reception, in particular to a DVB conditional reception device integrating basic data and normal data descrambling. Background technique [0002] DVB, that is, digital video broadcasting, was initiated by the "Joint Expert Group" jointly formed by the European Telecommunications Standardization Organization, the European Electronic Standardization Organization and the European Broadcasting Union. C. There are four types of terrestrial TV DVB-T and handheld terrestrial wireless TV DVB-H. The DVB standard includes channel coding, source coding, conditional access, subtitle transmission and other components. At present, the DVB standard and the improved standard compatible with DVB are widely used in various countries and regions such as Europe, Japan, Canada, and China. [0003] The conditional access system CAS in the DVB standard is a system deployed to charge for digital TV programs transmitte...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing digital TV program user group, there are high-end users who need very high-definition program content. They can afford expensive TV program fees and relatively complicated receiving terminals. Therefore, they can watch high-definition program content through three-level decryption. But there are also some low-income groups who have just transferred from the free analog TV user base. For them, the continuity of the program and the economy of the program are important. less basic data streams, and provide inexpensive charging terminals that enable them to watch, for example, standard-definition TV programs

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