CN104159156A - Method for realizing set-top box program update through NIT (Network Information Table) version number - Google Patents
Method for realizing set-top box program update through NIT (Network Information Table) version number Download PDFInfo
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- CN104159156A CN104159156A CN201410444463.7A CN201410444463A CN104159156A CN 104159156 A CN104159156 A CN 104159156A CN 201410444463 A CN201410444463 A CN 201410444463A CN 104159156 A CN104159156 A CN 104159156A
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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
The present invention relates to a kind of field of set-top, relate in particular to a kind of method that realizes programs of set-top box renewal by NIT version number.
Background technology
Along with the reinforcement of national digital TV entirety translation dynamics, each province, city and radio and television departments at different levels have completed digital shift and have accumulated the experience of the abundant aspect such as system building, operation.This just makes radio and television departments safeguard that voluntarily front end program source becomes more and more universal, as increased frequency, increases program, deletes program, changes program number, amendment program audio video PID and amendment program PMTPID etc.
If corresponding front end programme information changes, backend machine top box must be realized program updating function, otherwise will cause program normally rating with watch, cause user to be run off in a large number.
Can realize method that programs of set-top box upgrades has a variety ofly, and as NIT table version number change triggers is upgraded, PAT and PMT monitoring trigger to be upgraded etc.But because broadcasting and TV headend equipment provides manufacturer numerous at present, the nonstandard or difference of equipment, often causes having two or more NIT to show in same front end frequency.So just make same frequency code stream Li Youliangge NIT version number, finally cause showing self version number by NIT and change to realize upgrading and become impossible.Thereby the NIT table version number change triggers program updating that realizes optimization in Set Top Box seems very necessary.
Summary of the invention
Object of the present invention is just to provide one to address the above problem, no matter make the same frequency of front end have several NIT version number, and the method that the programs of set-top box being achieved by the NIT table version number change triggers program updating after optimizing upgrades.
To achieve these goals, the technical solution used in the present invention is: a kind of method that realizes programs of set-top box renewal by NIT version number, method is as follows, the first step is shown first circulation at front end code stream NIT and is inserted private setting descriptor, second step is resolved NIT table, first Set Top Box obtains the data of whole NIT table data from front end, from NIT data, find again the private setting descriptor of insertion according to description specification, parse the version number of corresponding effectively NIT table, deposit new NIT version number FLASH region corresponding to Set Top Box in, just can normally realize NIT program updating;
As preferably, described private setting descriptor is descriptor_tag;
As preferably, after set-top-box opening starts, monitor in real time the NIT version number under PRIV_NIT_TAG description in NIT table;
As preferably, when program DISPLAY ORDER is adjusted, the audio frequency and video PID that increased frequency, certain frequency and increased/deleted a programs, certain program changes or when program adds descrambling situation and changes, NIT version number under PRIV_NIT_TAG is added to 1, and representing needs Set Top Box to carry out program updating; Set-top box software starts program searching after detecting that NIT version number changes automatically, and program up-to-date front end is preserved, and new NIT version number is write to FLASH simultaneously, waits for next time and upgrades.
Compared with prior art, the invention has the advantages that: having solved the same frequency of broadcasting and TV front end has multiple NIT tables, and the version number of these NIT tables itself is variant, causes Set Top Box can repeat the problem of upgrading.Also can carry out program updating thereby realize under multiple NIT version number, and update method efficiency is high, safe and reliable, operation maintenance convenient.
Brief description of the drawings
Fig. 1 is theory diagram of the present invention.
Embodiment
The invention will be further described below.
Embodiment: referring to Fig. 1, a kind ofly realize by NIT version number the method that programs of set-top box upgrades, no matter make the same frequency of front end have several NIT version number, be achieved by the NIT table version number change triggers program updating after optimizing.Method is as follows,
One, show first circulation at front end code stream NIT and insert descriptor_tag private setting descriptor, as:
Two, the parsing of NIT table
First Set Top Box obtains the data of whole NIT table data from front end.
From NIT data, find descriptor_tag descriptor according to above description specification, parse the version number of effective NIT table, instead of use the version number of NIT table self.
Deposit new NIT version number FLASH region corresponding to Set Top Box in, just can normally realize NIT program updating.
After set-top-box opening starts, NIT version number under PRIV_NIT_TAG description in monitoring NIT table in real time, instead of the version number of monitoring NIT table self, because in the time having multiple NIT table under the same frequency of front end, just there is multiple NIT version number, cause version number's circulation change, final Set Top Box searching programs repeatedly, repeat to upgrade, cause user can not normally watch program.And version number under PRIV_NIT_TAG is that oneself can be controlled.If there is following situation: as broadcasting and TV have been adjusted program DISPLAY ORDER, increase a frequency, certain frequency increases or has deleted a programs, when the audio frequency and video PID of certain program changes and program adds descrambling situation and changes, NIT version number under PRIV_NIT_TAG is added to 1, representing needs Set Top Box to carry out program updating, otherwise will affect rating, after now set-top box software detects that NIT version number changes, automatically start program searching, program up-to-date front end is preserved, new NIT version number is write to FLASH simultaneously, wait for next time and upgrade.
Feature of the present invention is as follows, is set up and broadcast the configuration file that comprises NIT table information by front end system.In the time that broadcasting and TV front end system programme information changes, change the value of the configuration file version number of the descriptor in real-time broadcasting code stream NIT table, instead of change the value of the version number of NIT table own.Set Top Box is the value of the configuration file version number in descriptor in Real-Time Monitoring code stream, once change, at once again searches for, thereby has realized the renewal of programs of set-top box.Described update method, efficiency is high, safe and reliable, operation maintenance convenient.
Above to provided by the present invention by NIT version number realize programs of set-top box upgrade method carried out detailed introduction, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to be possible to change of the present invention and improvement, and can not exceed design and the scope of accessory claim defined, in sum, this description should not be construed as limitation of the present invention.
Claims (4)
1. realize by NIT version number the method that programs of set-top box upgrades for one kind, it is characterized in that: method is as follows, the first step is shown first circulation at front end code stream NIT and is inserted private setting descriptor, second step is resolved NIT table, first Set Top Box obtains the data of whole NIT table data from front end, from NIT data, find again the private setting descriptor of insertion according to description specification, parse the version number of corresponding effectively NIT table, deposit new NIT version number FLASH region corresponding to Set Top Box in, just can normally realize NIT program updating.
2. the method that realizes programs of set-top box renewal by NIT version number according to claim 1, is characterized in that: described private setting descriptor is descriptor_tag.
3. the method that realizes programs of set-top box renewal by NIT version number according to claim 2, is characterized in that: after set-top-box opening starts, monitor in real time the NIT version number under PRIV_NIT_TAG description in NIT table.
4. the method that realizes programs of set-top box renewal by NIT version number according to claim 3, it is characterized in that: when program DISPLAY ORDER is adjusted, the audio frequency and video PID that increased frequency, certain frequency and increased/deleted a programs, certain program changes or when program adds descrambling situation and changes, NIT version number under PRIV_NIT_TAG is added to 1, and representing needs Set Top Box to carry out program updating; Set-top box software starts program searching after detecting that NIT version number changes automatically, and program up-to-date front end is preserved, and new NIT version number is write to FLASH simultaneously, waits for next time and upgrades.
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Cited By (1)
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| CN104822081A (en) * | 2015-05-13 | 2015-08-05 | 四川金网通电子科技有限公司 | Method for updating NIT version number of digital television system front-end frequency point |
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Application publication date: 20141119 |