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Method for detecting data broadcast in transport stream

A technology of data broadcasting and detection method, applied in transmission systems, image communication, selective content distribution, etc., can solve the problem of inaccurate detection of data broadcasting services, and achieve the effect of accurate detection of data broadcasting services

Active Publication Date: 2022-03-22
HANGZHOU NATCHIP SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to address the deficiencies in the prior art and provide a method for detecting data broadcasting in transport streams, so that the broadcast front-end can easily adjust and expand data broadcasting services, while ensuring the accuracy and effectiveness of detecting data broadcasting services. The problem of inaccurate data broadcast service detection in the prior art

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  • Method for detecting data broadcast in transport stream
  • Method for detecting data broadcast in transport stream

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Embodiment Construction

[0035] A detection method for data broadcast in a transport stream, such as figure 1 As shown, the satellite broadcasting network front end inserts the following information in the transport stream:

[0036] (1) Insert the network information sub-table identified by the network identifier network_id of the designated operator into the network information table NIT, the network information sub-table carries the relevant information of the transmission network used by the operator, and is used to distinguish other transmission networks;

[0037] (2) Insert the business group association sub-table identified by the specified operator's business group identifier bouquet_id in the business group association table BAT; the business group association sub-table carries the linkage descriptor linkage_descriptor, and the prescribed linkage type is a linkage description of 0x6 The private data carried by the descriptor is the component tag component_tag, and the link descriptor defines the...

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Abstract

The invention discloses a method for detecting data broadcast in a transport stream. According to the method, a specified operator network information sub-table and a service group association sub-table are inserted into a transport stream at the front end of a satellite broadcast network and are used for indicating that the transport stream has specified operator data broadcast service. And defining a private field in a link descriptor of the service group association table, associating the service identifier bearing the data broadcast service with the component tag, and inserting descriptors in the program association table and the program mapping table to complete association of the component tag and the transport stream packet identifier. The set top box filters and analyzes the transport stream through the preset frequency point information, the network identifier and the service group identifier of the specified operator, detects whether the data broadcasting service provided by the specified operator exists in the transport stream, and obtains the transport stream packet identifier of the data broadcasting service; according to the method provided by the invention, the front-end system can be easily adjusted and expanded, and the influence on the preset parameters of the set top box when the data broadcasting service is modified is avoided.

Description

technical field [0001] The invention belongs to the technical field of set-top boxes, and in particular relates to a detection method for data broadcast in transmission streams. Background technique [0002] DVB Project (Digital Video Broadcasting Project, Digital Video Broadcasting Organization) is an industrial organization composed of more than 300 members. It was initiated by a joint expert group jointly formed by European Telecommunications Standardization Organization, European Electronic Standardization Organization and European Broadcasting Union. DVB (Digital Video Broadcasting, Digital Video Broadcasting) is a series of internationally recognized digital TV open standards maintained by the DVB Project. [0003] The front end of the satellite broadcasting network inserts NIT (Network Information Table, Network Information Table), BAT (Bouquet Association Table, Business Group Association Table), PAT (Program Association Table, Program Association Table), PMT (Progra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L65/611H04N21/2665H04N21/61H04N21/84
CPCH04N21/2665H04N21/6143H04N21/84Y02D30/70
Inventor 闫文志周真荣刘建华张美青
Owner HANGZHOU NATCHIP SCI & TECH