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Inter cut prevention method for terrestrial digital television

A terrestrial digital TV and anti-plug technology, which is applied in the direction of electrical components, image communication, selective content distribution, etc., can solve the problems of radio and TV interference and damage, and achieve the effect of simple configuration and low cost

Inactive Publication Date: 2016-02-03
CHENGDU SANLING KAITIAN COMM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, cases of interference and destruction of radio and television by hostile forces and illegal insertion of broadcasting facilities have occurred from time to time. If this problem is ignored, it will undoubtedly bring unpredictable negative effects to the healthy development of terrestrial digital television and the stability of the country and society. influences

Method used

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  • Inter cut prevention method for terrestrial digital television
  • Inter cut prevention method for terrestrial digital television
  • Inter cut prevention method for terrestrial digital television

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Effect test

Embodiment 1

[0030] refer to figure 1 , figure 2 , a terrestrial digital television anti-interruption method specifically adopts the following steps:

[0031] Step 1. The beacon stream generator 40 in the transmitter device first obtains the standard UTC time through the built-in Beidou timing module, and then signs and encrypts the timestamp to generate an anti-interruption beacon stream based on a trusted timestamp; transmit The beacon stream generator 40 in the end device extracts key frames in the program stream, signs and encrypts the key frames, and generates an anti-interruption beacon stream based on content signatures. The anti-interruption beacon stream mentioned in the patent application documents of the present invention refers to an anti-interruption TS stream based on a trusted time stamp or content signature. The beacon stream generator 40 is a device capable of generating an anti-interruption TS stream. The TS stream is A code stream of the MPEG-2 standard is a communica...

Embodiment 2

[0038] refer to image 3 , Figure 4 , a terrestrial digital television anti-interruption method specifically adopts the following steps:

[0039] Step 1. The beacon stream generator 40 in the transmitter device first obtains the standard UTC time through the built-in Beidou timing module, and then signs and encrypts the timestamp to generate an anti-interruption beacon stream based on a trusted timestamp.

[0040] Step 2: The video multiplexer 10 in the transmitter device performs systematic multiplexing of the anti-interruption beacon stream and other program beacon streams according to the terrestrial digital TV transport stream multiplexing specification, and then sends them to the receiver device through the transmission link .

[0041]Step 3: The set-top box 30 in the receiving end device obtains the anti-interruption beacon stream based on the trusted time stamp, then decrypts and verifies the content of the anti-interruption beacon stream, and uses the local system t...

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Abstract

The invention discloses an inter cut prevention method for a terrestrial digital television. The inter cut prevention method comprises the following steps: a first step, a beacon flow generator in a transmitting terminal device obtains a standard UTC time through a built-in Beidou time service module at first, and then carries out signature and encryption processing on a timestamp to generate an inter cut prevention beacon flow based on a credible timestamp; a second step, a video multiplexer in the transmitting terminal device integrates the inter cut prevention beacon flow with other program beacon flows and then transmits the same to a receiving end terminal through a transmission link; and a third step, a set-top box in the receiving end terminal obtains the inter cut prevention beacon flow based on the credible timestamp, decrypts and verifies the inter cut prevention beacon flow based on the credible timestamp, compares a local system time with a decrypted and verified timestamp, if the time delay exceeds a preset threshold, the set-top box has an inter cut attack and stops playing; and otherwise, the set-top box normally plays the program. The inter cut prevention method for the terrestrial digital television disclosed by the invention is used for protecting the security of a communication network of the digital television and preventing inter cut of illegal signals.

Description

technical field [0001] The invention belongs to the technical field of radio and television safety protection applications, and in particular relates to a method for preventing terrestrial digital television from being interrupted. Background technique [0002] Terrestrial digital television, as the main component of my country's radio and television, is one of the main means for residents in remote areas to watch radio and television. The main targets of terrestrial digital TV coverage are in suburbs, mountainous areas, rural areas, remote ethnic areas and areas inhabited by special ethnic minorities. Due to the particular geographical location and one-way coverage of terrestrial digital TV coverage, there are weak links in the security protection of terrestrial digital TV networks, which provide opportunities for "criminals" to insert illegal content. In recent years, cases of interference and destruction of radio and television by hostile forces and illegal insertion of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/8547H04N21/443H04N21/235H04N21/236H04N21/435H04N21/4623
CPCH04N21/2351H04N21/23614H04N21/4353H04N21/4433H04N21/4623H04N21/8547
Inventor 沈宜贾宇郭先会卢江波
Owner CHENGDU SANLING KAITIAN COMM IND
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