Demodulation decoding integrated digital television broadcasting program safety authentication method

A technology for digital TV broadcasting and programs, applied in pulse modulation TV signal transmission, digital transmission system, security communication device, etc., can solve the problems of weak security and easy to be cracked, achieve strong security and improve system security , the effect of low cost

Inactive Publication Date: 2008-03-12
HANGZHOU NATCHIP SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the method of software configuration is simple and easy, it is easy to be cracked and the security is not strong.

Method used

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  • Demodulation decoding integrated digital television broadcasting program safety authentication method

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Experimental program
Comparison scheme
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Embodiment Construction

[0024] As shown in Figure 1, the security authentication filter is integrated on the digital TV demodulation decoder. The digital TV demodulator-decoder includes the following modules: a channel decoder 101 , a security authentication filter 102 , a demultiplexer 103 , a video decoder 104 , and an audio decoder 105 .

[0025] The functions of each module are as follows:

[0026] Channel decoder 101: complete the reception, demodulation and channel decoding of the TS stream.

[0027] Security authentication filter 102: integrated in the information source decoding chip, placed before the demultiplexer, to realize the functions of effective identification, filtering, control and management of programs. Its specific technical solution will be described below.

[0028] Demultiplexer 103: identify and extract each audio, video, data elementary stream and various program information from the TS stream.

[0029] Video decoder 104, audio decoder 105: complete video and audio decodi...

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Abstract

The present invention relates to a method for the safety certification of a digital television broadcasting program. At present, the safety certification to the program is mainly realized through the software configuration, and the security is low. The method of the present invention has the procedures that a preset legal program name is wrote in a ROM; a PST chart is abstracted, and the mapping of a program number of each program and the PID value of a PMT chart are established; a SDT chart is abstracted, and the mapping between the program number and the program name of each program; the corresponding program number of each legal program is detected; the PMT chart of the legal program is abstracted, and the audio and video PID value is decoded; a corresponding TS package of the legal program is identified, and then transmitted to the back level. The method of the present invention integrates a safety certification filter in a digital television demodulator and a decoder, while the legality of program information is checked, the cost is low, therefore ensuring that the TS stream of a flow message source decoder only contains legal contents already checked and passed.

Description

technical field [0001] The invention belongs to the technical fields of digital multimedia processing and information security, and in particular relates to a program security authentication method integrated in a digital TV broadcast receiving decoder. Background technique [0002] Currently, there are various security vulnerabilities and threats in the broadcast television network. How to conduct effective program censorship and filtering to prevent the spread of harmful and illegal programs and information is an important aspect of radio and television network security technology. The code stream format used in digital TV broadcast transmission is the transport stream TS defined by the ITU-T MPEG-2 standard system layer. One TS stream contains one or more audio and video elementary streams, as well as other data streams, program service information and interactive information. The TS stream consists of fixed-length TS packets, and the PID field indicates various payload...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16H04N7/24H04L9/00H04L29/06
Inventor 黄智杰朱政张明
Owner HANGZHOU NATCHIP SCI & TECH
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