Method for real-time inserting signature and identifying signature indigit TV transmission flow

A digital TV, real-time insertion technology, applied in the direction of analog security/charging system, etc., can solve the problems of high real-time requirements and no solutions, and achieve the effect of ensuring real-time performance, improving efficiency and good real-time performance.

Inactive Publication Date: 2007-06-13
GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] However, the broadcasting of TV programs has relatively high requirements for real-time performance. Only by ensuring the real-time performance of the signature insertio

Method used

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  • Method for real-time inserting signature and identifying signature indigit TV transmission flow
  • Method for real-time inserting signature and identifying signature indigit TV transmission flow
  • Method for real-time inserting signature and identifying signature indigit TV transmission flow

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Embodiment Construction

[0056] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] In order to implement a method of inserting and verifying a signature in a transport stream without disturbance in real time in a secure digital television broadcasting system, the present invention proposes that at the signature end of the secure digital television system, the signature is packaged into a transport stream in a standard format. Package, that is, the signature package, is inserted into the original transport stream. The insertion method can be to send the signature package after the signed transport stream, or to insert the signature package into the next transport stream of the signed transport stream and send it out. . The signed package is sent to the verification terminal together with the basic package of the signed program. At the verification end of the secure digital television system, the signature package is ...

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Abstract

Using packet format in transmission flow, and associated relation, the method signs signatures on basic packet in transmission flow sectionally, and inserts signatures into transmission flow, and validates signatures in time of playing back the transmission flow. It is operation in real time for the method to insert and validate signatures. Fault tolerant mechanism is built at validation end in order to reduce erroneous judgment caused by channel disturbance.

Description

technical field [0001] The invention relates to digital television technology, in particular to a method for inserting and verifying signatures in real time in digital television transmission streams. Background technique [0002] With the development of science and technology, digital TV technology came into being. Because digital TV technology has the advantages of high transmission quality, wide range, many users, and fast speed, it will gradually replace traditional analog TV, so it has a very broad market prospect. [0003] Figure 1 shows the basic structure of an existing digital television broadcasting system. As can be seen from FIG. 1 , a digital TV broadcasting system 100 includes a TV program providing subsystem 101 , a TV signal broadcasting subsystem 102 , a network transmission subsystem 103 and a terminal playing subsystem 104 . The TV program provider provides the digital TV program transmission stream to the TV signal broadcasting subsystem 102 through the...

Claims

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Application Information

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IPC IPC(8): H04N7/16
Inventor 荆继武尚铭许良玉王晶
Owner GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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