KR20090123066A - Data gathering method for data broadcasting system - Google Patents

Abstract

PURPOSE: A data gathering method for a data broadcast system is provided to offer a service quickly by storing data for all OC(Object Carousel) and using the stored data in response to a file request. CONSTITUTION: Filtering resources are obtained and filtering is started(S22). Module gathering, file loading, and a file request are performed(S23). It is determined whether file gathering is found or not(S25). If file gathering is not found, file gathering is performed and a file is provided. If file providing is terminated, filtering is terminated and the filtering resource is released(S30).

Description

Data gathering method for data broadcasting system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data gathering method of a data broadcasting system, and more particularly, to reduce the time required for a data broadcasting system to receive and store related data in advance in order to service data transmitted from a broadcasting station more quickly. It relates to a data gathering method. Since the present invention does not need to use the resources of the system again when necessary, it is possible to effectively use the resources of the system.

The data broadcast system refers to a broadcast that transmits information in the form of code or data, not broadcast of audio and video. It is a new media that has a feature that a receiver automatically decodes and processes the code or data and receives the result directly, or controls other machines based on the information. In most cases, a signal is transmitted by multiplexing on a radio or television broadcast. It is a new media that has the characteristics of receiving digital signals on broadcast waves and transmitting them automatically to decode and process codes or data and receive the results directly or to control other mechanisms based on the information. It is broadcast. Signals of data broadcasting have a common point with digital broadcasting which digitally transmits audio and video signals through digital transmission. There are various forms of information to be broadcast, such as a form of encoding a natural language, a form of data code representation in which information is coded, a form of computer language, and a form of compression encoding of pattern information.

Although data broadcasting is mostly multiplexed to radio and television broadcasting, there is a data broadcasting for transmitting information independent of data broadcasting for transmitting contents related to these broadcasting as digital signals. Therefore, such data broadcasting can be said to be a full-fledged multimedia information service that combines the advantages of a wireless transmission system using television radio waves and the bidirectional function of the Internet. Data broadcasting services information by utilizing an unused area of television propagation. Therefore, a variety of information can be enjoyed free of charge in a system capable of receiving television radio waves. In addition, it has been developed with two-way in mind and can be easily connected to the Internet.

In general, a data broadcasting system includes a broadcasting station, a set top box, and a television, and transmits a broadcast in the form of a transport stream (TS) from the broadcasting station to the set top box. At this time, data (Java application program and related resources) necessary for data broadcasting are extracted from the broadcast stream and displayed on the TV. Set-top boxes can be external or built-in to TVs.

The data broadcasting system used in DVB-MHP, ACAP, and OCAP basically supports object carousel (OC). The OC sends data repeatedly to the broadcast stream periodically and the set-top box searches for the necessary files.

1 is a flowchart of a conventional data gathering method. As shown in the related art, when a file is requested to be loaded by an application program, such a request is delivered with OC data via a Java virtual machine (JVM). In this case, the OC data is included in the form of a module (collection of files) in a stream transmitted from a broadcasting station and transmitted. When each file is requested, the set-top box can obtain the desired module by section filtering by the pid including data from the TS and the module id of the module to find the module having the file. That is, if there is a file loading and request (S11), the existence of the file is checked (S12), and if the file exists, the file is provided (S18), and then it is determined whether to terminate (S19) or start again. If the file does not exist, the filtering resource is acquired (S13) to start filtering (S14), the module gathering (S15) to terminate the filtering (S16), the filtering resource is released (S17), and the file is provided (S18). In the order in which they occur.

However, there is a time problem in gathering data in the above manner. If 10 modules are transmitted for 10 seconds with numbers from 0 to 9, first request 2 modules to collect data and then request module 1 again. Can receive modules Because of this problem, the time to collect data can be several times longer in some cases. In addition, because the filtering resources of the system must be used and canceled every time, complex processes can cause errors, and if necessary, several processes can be performed at once, thus increasing the use of resources.

The present invention has been made to solve the problems of the prior art, it is possible to expedite the service by storing all the OC-related data in the pid containing the data to use the already stored data when there is a request for a file. In addition, since only one resource needs to be used to gather data, the purpose is to efficiently use the resource.

The data gathering method of the data broadcasting system according to the present invention includes the steps of obtaining a filtering resource, starting filtering, performing module gathering, loading and requesting a file, determining whether a file is gathered, and , If there is no gathering, carry out gathering and if there is gathering, go to the step of providing a file, go to the step of loading and requesting a file, if it is not finished depending on whether it is finished, and go to the next step if ending, and ending If it is, characterized in that consisting of the step of terminating the filtering and canceling the filtering resources.

In other words, the process of finding a pid to which data is transmitted in the TS, filtering the corresponding pid to store the module and the module information, and providing a file through the JVM for the request. In this case, the stored module and the module information may be stored in a file or a memory.

In the data gathering method of the data broadcasting system according to the present invention, since the data for providing the corresponding file can be directly provided by using already stored modules and module information, the service can be dazzled. In addition, the application is efficient because the application only needs to acquire and release resources once and without the process of acquiring and releasing system resources whenever a request is made.

If all the data having pids containing data from the TS are stored in a file or memory, the stored data can be provided when the application requests a file through the JVM. If there is a request for a module that has not yet been transmitted, the module may be transmitted and stored, and then the requested file may be provided.

Referring to FIG. 2, the data gathering method of the data broadcasting system according to the present invention includes obtaining a filtering resource (S21), starting filtering (S22), performing a module gathering (S23), and a file. Loading and requesting step (S24), determining whether there is a file gathering (S25), if there is no gathering to perform the gathering and if there is gathering (S26), providing a file (S27), Depending on whether or not the end, if not the end of the file loading and requesting step (S24) and if the end proceeds to the next step (S28), if the end is terminated filtering (S29) and the step of releasing the filtering resources (S30) It is composed of

1 is a flowchart of a data gathering method of a data broadcasting system according to the prior art;

2 is a flowchart illustrating a data gathering method of a data broadcasting system according to the present invention.

Claims (1)

As a method of gathering data in a data broadcasting system, Acquiring filtering resources, starting filtering, performing module gathering, loading and requesting files, determining whether there is file gathering, performing gathering if no gathering, and skipping if there is gathering. Is a step of providing a file, a step of loading and requesting a file according to whether or not the file is terminated, and moving to the next step if the file is terminated, and ending filtering and releasing filtering resources when the file is terminated. It consists of.

Images