Method for realizing set-top box program update through NIT (Network Information Table) version number

Abstract

The invention discloses a method for realizing set-top box program update through an NIT (Network Information Table) version number. The method comprises the following steps: I, inserting a private descriptor into a first cycle of a front-end code stream NIT table; and II, resolving the NIT table: acquiring data of the whole NIT table from a front end by using a set-top box, finding out the inserted private descriptor from the NIT data according to a description specification, resolving a version number corresponding to a valid NIT table, and storing the new NIT version number in a corresponding FLASH area of the set-top box to realize NIT program update normally. Compared with the prior art, the method has the advantages that the problem of repeated update of the set-top box since a plurality of NIT tables exist at the same frequency point of a broadcasting front end and the version numbers of the NIT tables are different is solved. By adopting the method, program update can be performed under the condition of the plurality of NIT version numbers. Moreover, the update method is efficient, safe and reliable, and is convenient to operate and maintain.

Description

technical field [0001] The invention relates to the field of set-top boxes, in particular to a method for updating programs of the set-top box through NIT version numbers. Background technique [0002] With the strengthening of the national digital TV overall conversion and translation, the provinces, cities and radio and television departments at all levels have completed the digital translation and accumulated rich experience in system construction and operation. This makes it more and more popular for radio and television departments to maintain front-end program sources by themselves, such as adding frequency points, adding programs, deleting programs, changing program numbers, modifying program audio and video PIDs, and modifying program PMTPIDs. [0003] Correspondingly, if the front-end program information changes, the back-end set-top box must implement the program update function, otherwise the program will not be able to be viewed normally, resulting in a large los...

AI Technical Summary

Problems solved by technology

However, because there are many manufacturers of radio and television front-end equipment, and the equipment is not standard or different, it often leads to two or more NIT tables in the same front-end frequency point.

In this way, there are two NIT version numbers in the same frequency bit stream, which eventually makes it impossible to update through the change of the version number of the NIT table itself

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