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Digital TV terminal conditional access method, terminal and system

A digital TV terminal and conditional access technology, applied in electrical components, image communication, selective content distribution, etc., can solve problems such as increasing product production costs and reducing product market competitiveness, achieving good scalability and enhancing product competitiveness , The effect of speeding up the R&D cycle

Active Publication Date: 2019-02-01
SHENZHEN TCL NEW-TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Therefore, the conditional access of existing digital TV terminals needs to rely on various hardware devices based on decryption and descrambling modules, such as smart cards, built-in descrambling chips, etc., thereby increasing the production cost of the product and reducing the market competitiveness of the product

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  • Digital TV terminal conditional access method, terminal and system
  • Digital TV terminal conditional access method, terminal and system
  • Digital TV terminal conditional access method, terminal and system

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Embodiment Construction

[0046] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] The solution of the embodiment of the present invention is mainly: the decryption and descrambling operation of the transport stream of the conditional reception of the digital TV terminal is completed by the cloud server, so that the conditional reception of the digital TV terminal no longer depends on various hardware devices based on the decryption and descrambling module , such as smart cards, built-in descrambling chips, etc., to reduce product production costs, reduce integration work, speed up product development cycles, and enhance product competitiveness.

[0048] Such as image 3 As shown, a preferred embodiment of the present invention proposes a conditional access method for a digital television terminal, including:

[0049] Step S101, obtaining a transport stream and a PSI, the PSI including a con...

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Abstract

The present invention relates to a digital television terminal condition receiving method, terminal and system, the method comprising: acquiring a transmission stream and PSI, the PSI comprising a condition receiving table and a program map table; according to the condition receiving table and the program map table in PSI, calling a service interface of a decryption and descrambling program provided by a cloud server, and acquiring data fed back by the service interface; acquiring a control word of the transmission stream from the data fed back; transmitting the control word to the decoder to descramble the transmission stream. The present invention enables the condition receiving of the digital television terminal to no longer rely on various hardware devices based on the decryption and descrambling module, thus reducing production cost of the product and integration work, and accelerating development cycle of the product and increasing competitiveness of the product; besides, on a basis of a software structure of the cloud computation, the present invention has a better expandability and provides convenience for providing colorful value adding services.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a digital television terminal conditional reception method, terminal and system. Background technique [0002] CAS (Conditional Access System, conditional access system for digital TV) is the core technology of broadcast TV network. Through CAS, broadcast TV network operators can realize the management and control of digital TV terminal receiving equipment, so that authorized users can watch specific programs. Unauthorized users cannot watch it. In addition, CAS also provides a basis for the operator's charges. [0003] The general principle of CAS is: the front-end CAS implements scrambling and encryption of the transmission stream; the terminal CA performs a reverse process, that is, decryption and descrambling. The so-called scrambling refers to the process of using CW (Control Word, control word) to disturb the bit sequence of the transport stream and then encryp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/434H04N21/4405H04N21/435H04N21/4623
CPCH04N21/434
Inventor 罗克光
Owner SHENZHEN TCL NEW-TECH CO LTD
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