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Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television

A technology for receiving terminals and digital TVs, which is applied in the parts of color TVs, parts of TV systems, TVs, etc.

Inactive Publication Date: 2009-01-28
天栢宽带网络科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the maturity of cable digital TV, terrestrial wireless digital TV is just in its infancy, and the corresponding receiving terminals have just emerged, but they can only meet the reception and playback of simple clear streams, and do not know what to do about the encrypted programs that will be provided by subsequent operators

Method used

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  • Apparatus for deciphering and descrambling receiving terminal of ground wireless digital television

Examples

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no. 1 example

[0027] Fig. 1 shows the principle of the first embodiment of the decryption and descrambling device of the receiving terminal of terrestrial wireless digital TV according to the present invention. Please refer to Fig. 1, the decryption and descrambling device of the present embodiment provides the function of conditional reception for the receiving terminal of the terrestrial wireless digital TV, and the terrestrial TV reception technology is based on the terrestrial digital TV system (DTMB) and supports single / multi-carrier. The device follows the Microsoft Broadcast Driver Architecture (BDA, Broadcast Driver Architecture) at the hardware and driver layer, and the terminal software layer follows the Microsoft DirectShow application framework, and integrates a proprietary decryption and descrambling module. Among them, DirectShow is an application programming interface developed by Microsoft that enables software developers to perform various processing on media files.

[0028...

no. 2 example

[0032] Fig. 2 shows the principle of the first embodiment of the decryption and descrambling device of the receiving terminal of the terrestrial wireless digital TV of the present invention. Please refer to Fig. 2, the decryption and descrambling device of the present embodiment provides the function of conditional reception for the receiving terminal of the terrestrial wireless digital TV, and the terrestrial TV receiving technology is based on the terrestrial digital TV system (DTMB), and supports single / multi-carrier. The device follows the Microsoft Broadcast Driver Architecture (BDA, BroadcastDriver Architecture) in the hardware and driver layer, and the software layer on the terminal follows the Microsoft DirectShow application framework, and integrates a proprietary decryption and descrambling module. Among them, DirectShow is an application programming interface developed by Microsoft that enables software developers to perform various processing on media files.

[003...

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Abstract

The invention provides a decrypting descrambling device for a ground wireless digital television receiving terminal, by which a terminal can receive and play encrypting scrambling programs. The technical proposal of the invention is as follows: the device comprise a condition receiving card read-write interface module providing the read-write of the condition receiving card, a digital signal receiving module demodulating modulated digital signals to encrypted scrambled digital television signals, a de-multiplexing module, an encrypting module, a descrambling module, a decoding module and a playing module, wherein the digital television signals are processed by a BDA frame on a driving layer to obtain the TS flow, and the de-multiplexing module de-multiplexes the TS flow to obtain the scrambling video-audio flow and the corresponding authorization information; the encrypting module receives the authorization information, based on which a control word is obtained from the condition receiving card; the descrambling module descrambles the scrambling video-audio flow according to the control word; the decoding module converts the descrambling video-audio flow to the playable video-audio flow according to the DirectShow frame on a software layer; and the playing module plays the video-audio flow. The invention is applied to the ground wireless digital television field.

Description

technical field [0001] The invention relates to a decryption and descrambling device for a receiving terminal of a digital television, in particular to a decryption and descrambling device for a receiving terminal of a terrestrial wireless digital television. Background technique [0002] In the field of digital TV, in order to meet the operating requirements of operators and protect the copyright of program sources, it is necessary to encrypt the program stream at the front end, which requires conditional access for the current terminal receiving equipment. This has been realized in the field of digital set-top box STB, but it has not been realized in PC and handheld mobile terminals. [0003] There are various portable digital TV receiving devices on the market at present, such as USBDongle products supporting various standards. The development of STB of cable TV terminal has been relatively mature. As the necessary conditional access system CA of digital TV, it plays a v...

Claims

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Application Information

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IPC IPC(8): H04N7/167H04N7/16H04N5/00H04N21/434H04N21/435
Inventor 吕品殷文明
Owner 天栢宽带网络科技(上海)有限公司
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