Method for retrieving text information of digital television

Abstract

The embodiment of the invention discloses a method for retrieving texts of a digital television. The method comprises the following steps of: a, dividing all the contents corresponding to the texts of the digital television into at least two categories, and establishing keywords for each category; b, setting up a bouquet association table (BAT) according to the texts, and establishing a service group ID for each category; c, searching an electronic program guide (EPG) text or an event information table (EIT) to match the description of all the current texts and words with the keywords and adding the IDs of the texts successfully matched into transport stream (TS) descriptors of corresponding service groups in the BAT according to the word category of the keywords; d, packaging the finished BAT into TS stream for transmission; and, e, determining all the words successfully matched so as to remove all the channel IDs from each text type service group in the BAT, and returning to step C. By the implementation of the invention, the efficiency of searching texts is greatly improved by the method for retrieving digital texts.

Description

Technical field [0001] The present invention relates to the technical field of digital TV search, in particular to a method for searching text information of digital TV. Background technique [0002] At present, the content of digital TV is becoming more and more abundant, and the information of various text content is also increasing. The text organization structure mostly adopts the physical structure of the primary index for searching. It is difficult for users to quickly and conveniently find the text content information they want. At present, in order to facilitate users to retrieve various text information, an electronic program guide (EPG) system is integrated in the digital TV set-top box, but EPG is usually based on the program in a single text message, and the structure level is only two levels. The user must first determine the text Only words can retrieve the text information of the program. It is not possible to retrieve the program according to the type of informat...

AI Technical Summary

Problems solved by technology

It is difficult for users to quickly and conveniently find the text content information they want

At present, in order to facilitate users to retrieve various text information, an electronic program guide (EPG) system is integrated in the digital TV set-top box, but EPG is usually based on the program in a single text information, and the structure level is only two levels. Users must first determine the text information. Only words can retrieve program text information, and it is impossible to retrieve programs according to the type of information they need. For example, when they want to see the current weather conditions, users can only browse the program navigation of each channel one by one to see if there is such information, and the retrieval efficiency is very low.

Some set-top boxes divide each information table into various program types by using a business group association table (Bouquet Association Tale, BAT) or a service description table (Service Description Table, SDT), providing a "text category-word-text Although the text retrieval system with three levels of structure solves the above-mentioned problems of the existing EPG to a certain extent, because all text information content is usually divided by the operator according to the content category of operation, the difference between text information and content category Time is sometimes inconsistent, such as browsing stock information on digital TV, which will cause wrong text information retrieval. In addition, some comprehensive content cannot be judged by text category, which narrows the scope of retrieval

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