CN111464855A - Program data synchronization method - Google Patents
Program data synchronization method Download PDFInfo
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- CN111464855A CN111464855A CN202010452241.5A CN202010452241A CN111464855A CN 111464855 A CN111464855 A CN 111464855A CN 202010452241 A CN202010452241 A CN 202010452241A CN 111464855 A CN111464855 A CN 111464855A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26291—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for providing content or additional data updates, e.g. updating software modules, stored at the client
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
- H04N21/4586—Content update operation triggered locally, e.g. by comparing the version of software modules in a DVB carousel to the version stored locally
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention provides a program data synchronization method, which comprises the following steps: acquiring frequency point information corresponding to a program to be played and a program being played, and judging whether the frequency point information is the same; if the current frequency point information is different, the cache data of each data table under the current frequency point information is cleared, and the current frequency point is locked; acquiring real-time data of each data table, and judging whether the real-time data of each data table is the same as the corresponding cache data; when the data tables are different, the real-time data of each data table is used as updated cache data; and analyzing the corresponding program description according to the updated cache data, and updating the program data attribute in the digital set top box if the program description is different from the program data attribute in the digital set top box. The invention adopts a processing mode of updating the corresponding attribute of the stored program data by a single table, follows the asynchronous processing principle of first come and first processed, does not need to wait for the synchronous processing of other tables in the real-time data, effectively improves the updating efficiency, shortens the updating time and greatly improves the use experience of users.
Description
Technical Field
The invention relates to the technical field of digital televisions, in particular to a program data synchronization method.
Background
The digital television system mainly comprises two parts, namely a digital signal sending server and a digital set-top box, wherein the communication mode is that the digital signal sending server broadcasts digital signals, and the digital set-top box receives the digital signals. Because the digital television system adopts the unidirectional communication mode, after the digital signal sending server adds or deletes part of programs, a proper method is needed to match the program data on the digital set-top box with the program data sent by the digital signal sending server, and then the program data on the digital set-top box is synchronized with the program data sent by the digital signal sending server.
Two main synchronization methods exist as follows: monitoring a part of tables in a PSI/SI protocol, prompting a user that program data is updated according to version change of the tables, entering a program searching menu to search programs again, and achieving the purpose of synchronizing the program data of a digital signal sending server; and secondly, monitoring a part of tables in the PSI/SI protocol, stopping playing the program according to the version change of the tables, and then updating in a background mode to achieve the purpose of synchronizing the program data of the digital signal transmission server.
However, because some digital signal sending servers have problems, the version number of the table after data modification does not change, and updating of the digital set-top box cannot be triggered. In addition, whether the program is searched again or the program is stopped to be played for background updating, the normal program watching of the user is influenced, and the watching experience of the user is reduced.
It is noted that this section is intended to provide a background or context to the disclosed embodiments as recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
The embodiment of the invention provides a program data synchronization method, which aims to solve the problems that when program data in a digital set top box and program data sent by a digital signal sending server are synchronized, a user is influenced to normally watch programs, the data is modified by the signal sending server, and the version description of a corresponding table is not changed in the prior art.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
s1, after the digital set-top box is powered on, the digital set-top box is started;
s2, switching programs by the terminal user through the digital set-top box;
s3, acquiring frequency point information corresponding to a program to be played and frequency point information corresponding to a program being played, and judging whether the frequency point information corresponding to the program to be played and the frequency point information corresponding to the program being played are the same;
s4, if the judgment result in the step S3 is the same, directly playing the program to be played;
s5, if the judgment results in the step S3 are different, clearing the cache data of each data table under the frequency point information corresponding to the program being played, locking the frequency point according to the frequency point information corresponding to the program to be played, and resetting the filtering channel;
s6, acquiring real-time data of each data table through a filtering channel;
s7, judging whether the real-time data of each data table is the same as the cache data corresponding to each data table;
s8, if the judgment result in the step S7 is the same, continuing to execute the step S6;
s9, if the judgment results in the step S7 are different, storing the real-time data of each data table into the corresponding cache space to serve as the updated cache data of each data table;
s10, analyzing the corresponding program description according to the updated cache data of each data table, and judging whether the analyzed program description is the same as the corresponding program data attribute in the digital set top box; if the analyzed program description is different from the corresponding program data attribute in the digital set top box, updating the corresponding program data attribute in the digital set top box;
s11, judging whether the audio and video PID of the program being played is updated;
and S12, if the judgment result in the step S7 is that the program is updated, the program being played is played again.
As a preferred embodiment of the present invention, in step S3, if the digital set top box is playing a program for the first time, it is determined that the frequency point information corresponding to the program to be played is different from the frequency point information corresponding to the program being played.
As a preferred mode of the present invention, the cache data of each data table includes program association table cache data, program mapping table cache data, service description table cache data, network information table cache data, and service group association table cache data; the real-time data of each data table comprises program association table real-time data, program mapping table real-time data, service description table real-time data, network information table real-time data and service group association table real-time data.
As a preferred embodiment of the present invention, the step S7 of determining whether the real-time data of each data table is the same as the cache data corresponding to each data table includes:
judging that at least one parameter of the real-time data of the program association table is different from at least one parameter of the cache data of the program association table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the program mapping table is different from at least one parameter of the cache data of the program mapping table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service description table is different from at least one parameter of the cache data of the service description table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the network information table is different from at least one parameter of the cache data of the network information table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service group association table is different from the cache data of the service group association table;
the parameters comprise the version number of the table, the number of sections contained in the table and the CRC value of the corresponding section in the table, and the version number of the table, the number of sections contained in the table and the CRC value of the corresponding section in the table are compared in sequence during judgment.
As a preferred embodiment of the present invention, in step S9, when it is determined that the real-time data of each data table is different from the cache data corresponding to each data table, the real-time data of the program association table, the real-time data of the program mapping table, the real-time data of the service description table, the real-time data of the network information table, and the real-time data of the service group association table are respectively stored in corresponding cache spaces as updated cache data of the program association table, cache data of the program mapping table, cache data of the service description table, cache data of the network information table, and cache data of the service group association table.
As a preferred embodiment of the present invention, in step S10, the analyzing the corresponding program description according to the updated cache data of each data table includes:
according to the updated program association table cache data, analyzing the number of programs under the current frequency point, and updating the number of programs under the corresponding frequency point in the digital set top box;
according to the updated program mapping table cache data, analyzing the audio and video PID, the caption PID and the image-text PID of each program at the current frequency point, and updating the audio and video PID, the caption PID and the image-text PID of each program at the corresponding frequency point in the digital set top box;
analyzing the name and type of each program under the current frequency point according to the updated service description table cache data, and updating the name and type of each program under the frequency point corresponding to the digital set top box;
analyzing the logic serial number of each program in the network where the current frequency point is located according to the updated network information table cache data, and updating the logic serial number of each program belonging to the network in the digital set top box;
and analyzing the grouping information of each program in the network where the current frequency point is located according to the updated service group association table cache data, and updating the grouping information of each program belonging to the network in the digital set top box.
As a preferred mode of the present invention, in step S10, when the corresponding program data attribute in the digital set-top box is updated, only the place where the program data attribute in the digital set-top box is different from the parsed program description is updated; if the analyzed program description is the same as the corresponding program data attribute in the digital set-top box, no update is required.
According to the program data synchronization method provided by the embodiment of the invention, the program data of the data sending server and the program data of the digital set-top box are synchronized in a full-automatic background running mode, and after the program switching operation is carried out by a terminal client, the background self-adaptively carries out the monitoring and updating operation of the program data without the intervention of the terminal client, so that the updating efficiency is effectively improved, the updating time is shortened, the use experience of a user is greatly improved, and the method for the digital set-top box to self-adaptively synchronize the program data of the digital signal sending server, which is efficient, stable and good in experience, is provided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a program data synchronization method according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
Before the technical solutions provided by the embodiments of the present invention are explained in detail, the following terms appearing in the embodiments of the present invention are explained:
PSI/SI: in the system of the MPEG II standard, PSI describes the content carried by the transport stream, including the description of the elementary streams that construct each program and the description of the program itself; SI describes technical characteristics and other information of each service provided by a certain player;
PAT: a program association table describing which PIDs are included in the current TS stream; only according to the obtained PID, the obtained PID can be used as a certificate to find out other tables (such as PMT table) and information thereof;
PMT: a program map table describing a mapping between a given program number and elements constituting the program;
and (3) SDT: a service description table describing all programs in the digital television network, such as program names, types, and the like;
NIT: a network information table describing information related to a network in the digital television network;
BAT: a service group association table describing all service group information in the digital television network;
PID: satellite television transmits an identification code for a packet or data packet in a data stream.
Referring to fig. 1, the embodiment of the present invention discloses a method for synchronizing program data, which mainly includes the following steps:
s1, after the digital set-top box is powered on, the digital set-top box is started;
s2, switching programs by the terminal user through the digital set-top box;
s3, acquiring frequency point information corresponding to a program to be played and frequency point information corresponding to a program being played, and judging whether the frequency point information corresponding to the program to be played and the frequency point information corresponding to the program being played are the same;
s4, if the judgment result in the step S3 is the same, directly playing the program to be played;
s5, if the judgment results in the step S3 are different, clearing the cache data of each data table under the frequency point information corresponding to the program being played, locking the frequency point according to the frequency point information corresponding to the program to be played, and resetting the filtering channel;
s6, acquiring real-time data of each data table through a filtering channel;
s7, judging whether the real-time data of each data table is the same as the cache data corresponding to each data table;
s8, if the judgment result in the step S7 is the same, continuing to execute the step S6;
s9, if the judgment results in the step S7 are different, storing the real-time data of each data table into the corresponding cache space to serve as the updated cache data of each data table;
s10, analyzing the corresponding program description according to the updated cache data of each data table, and judging whether the analyzed program description is the same as the corresponding program data attribute in the digital set top box; if the analyzed program description is different from the corresponding program data attribute in the digital set top box, updating the corresponding program data attribute in the digital set top box;
s11, judging whether the audio and video PID of the program being played is updated;
and S12, if the judgment result in the step S7 is that the program is updated, the program being played is played again.
In the embodiment of the present invention, in step S1, after the digital set top box is powered on, the digital set top box is started to enable the digital set top box to be in an open state, so that a program can be played or switched.
In step S2, when the end user switches programs through the digital set-top box, two situations are included: the first is that the digital set-top box plays programs for the first time after starting up, and no current locking frequency point information exists at the moment; the other is that the digital set-top box is not the first playing program after being started, the terminal client normally switches the program, and the current locking frequency point information exists at the moment.
In step S3, if the digital set-top box is playing a program for the first time, determining that the frequency point information corresponding to the program to be played is different from the frequency point information corresponding to the program being played, and directly entering step S4; if the digital set-top box is not the first broadcast program, it needs to judge whether the frequency point information corresponding to the program to be broadcast is the same as the frequency point information corresponding to the program being broadcast, and the step S4 or S5 is selected according to the judgment result.
In step S4, if the determination result is that the frequency point information corresponding to the program to be played is the same as the frequency point information corresponding to the program being played, the program to be played may be directly played.
In step S5, if the determination result is that the frequency point information corresponding to the program to be played is different from the frequency point information corresponding to the program being played, the cache data of each data table under the frequency point information corresponding to the program being played is cleared, because the data of the partial tables under different frequency point information are originally different and need to be obtained again.
And then, locking the current frequency point according to the frequency point information corresponding to the program to be played, and resetting the filtering channel.
In step S6, after the filtering channel is set, each data table will continuously throw the real-time data of each data table.
The cache data of each data table comprises program association table cache data, program mapping table cache data, service description table cache data, network information table cache data and service group association table cache data; the real-time data of each data table comprises program association table real-time data, program mapping table real-time data, service description table real-time data, network information table real-time data and service group association table real-time data.
In step S7, it is determined whether the real-time data of each data table is the same as the cache data corresponding to each data table, and the specific process is as follows:
judging that at least one parameter of the real-time data of the program association table is different from at least one parameter of the cache data of the program association table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the program mapping table is different from at least one parameter of the cache data of the program mapping table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service description table is different from at least one parameter of the cache data of the service description table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the network information table is different from at least one parameter of the cache data of the network information table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service group association table is different from the cache data of the service group association table;
the parameters include the version number of the table, the number of the sections contained in the table and the CRC value of the corresponding section in the table. The CRC value here is a Cyclic Redundancy Check value, which is called a Cyclic Redundancy Check.
And when judging, comparing the version number of the table, the number of the sections contained in the table and the CRC value of the corresponding section in the table in sequence. Comparing the version numbers of the tables, and if the version numbers are not the same, entering step S10; if the number of the segments in the comparison table is the same, continuing to compare the number of the segments in the comparison table, and if the number of the segments in the comparison table is not the same, entering the step S10; if the CRC values are the same, continuously comparing the CRC values corresponding to the segments in the table, and if the CRC values are not the same, entering the step S10; if so, the flow proceeds to step S8.
In step S8, if the real-time data in each data table is the same as the cache data corresponding to each data table, the process proceeds to step S6.
In step S9, if the real-time data of each data table is not the same as the cache data corresponding to each data table, the real-time data of each data table is stored in the corresponding cache space as the updated cache data of each data table.
Specifically, when it is determined that the real-time data of each data table is different from the cache data corresponding to each data table, the real-time data of the program association table, the real-time data of the program mapping table, the real-time data of the service description table, the real-time data of the network information table, and the real-time data of the service group association table are respectively stored in corresponding cache spaces and respectively used as updated cache data of the program association table, cache data of the program mapping table, cache data of the service description table, cache data of the network information table, and cache data of the service group association table.
In step S10, the corresponding program description is parsed from the updated cache data of each data table. Then, whether the analyzed program description is the same as the corresponding program data attribute in the digital set-top box is judged. And if the analyzed program description is different from the corresponding program data attribute in the digital set top box, updating the corresponding program data attribute in the digital set top box.
Specifically, the analyzing the corresponding program description according to the updated cache data of each data table specifically includes:
according to the updated program association table cache data, analyzing the number of programs under the current frequency point, and updating the number of programs under the corresponding frequency point in the digital set top box;
according to the updated program mapping table cache data, analyzing the audio and video PID, the caption PID and the image-text PID of each program at the current frequency point, and updating the audio and video PID, the caption PID and the image-text PID of each program at the corresponding frequency point in the digital set top box;
analyzing the name and type of each program under the current frequency point according to the updated service description table cache data, and updating the name and type of each program under the frequency point corresponding to the digital set top box;
analyzing the logic serial number of each program in the network where the current frequency point is located according to the updated network information table cache data, and updating the logic serial number of each program belonging to the network in the digital set top box;
and analyzing the grouping information of each program in the network where the current frequency point is located according to the updated service group association table cache data, and updating the grouping information of each program belonging to the network in the digital set top box.
It should be noted that, in step S10, when the corresponding program data attribute in the digital set-top box is updated, only the place where the program data attribute in the digital set-top box is different from the parsed program description is updated; if the analyzed program description is the same as the corresponding program data attribute in the digital set-top box, no update is required.
When the program data attribute is updated, a mechanism that each data table is updated independently is adopted, and data synchronization of other data tables is not required to be waited. In the updating process, only the place where the program data attribute in the digital set-top box is different from the analyzed program description is updated, if the program data attribute is the same as the analyzed program description, the updating is not needed.
In step S11 and step S12, a situation is described together, that is, when the audio/video PID of the program being played changes and the update is completed, a means for playing the program again is required to ensure the normal playing of the program.
After the step S11 and the step S12 are set, it is ensured that the program being played can still continue to be played normally after the audio/video PID of the program being played is updated.
In summary, the program data synchronization method and system provided by the embodiments of the present invention are suitable for a digital set top box, and a processing manner of individually comparing real-time data of each table sent by a digital signal sending server with cache data of each table is adopted, so that the cache data of each table is individually updated without waiting for synchronization of other table data, thereby effectively improving the updating efficiency, shortening the updating time, greatly improving the user experience, and providing a method for adaptively synchronizing program data of a digital signal sending server by a digital set top box, which is efficient, stable, and has good experience.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A method for synchronizing program data, applied to a digital set-top box, the method comprising:
s1, after the digital set-top box is powered on, the digital set-top box is started;
s2, switching programs by the terminal user through the digital set-top box;
s3, acquiring frequency point information corresponding to a program to be played and frequency point information corresponding to a program being played, and judging whether the frequency point information corresponding to the program to be played and the frequency point information corresponding to the program being played are the same;
s4, if the judgment result in the step S3 is the same, directly playing the program to be played;
s5, if the judgment results in the step S3 are different, clearing the cache data of each data table under the frequency point information corresponding to the program being played, locking the frequency point according to the frequency point information corresponding to the program to be played, and resetting the filtering channel;
s6, acquiring real-time data of each data table through a filtering channel;
s7, judging whether the real-time data of each data table is the same as the cache data corresponding to each data table;
s8, if the judgment result in the step S7 is the same, continuing to execute the step S6;
s9, if the judgment results in the step S7 are different, storing the real-time data of each data table into the corresponding cache space to serve as the updated cache data of each data table;
s10, analyzing the corresponding program description according to the updated cache data of each data table, and judging whether the analyzed program description is the same as the corresponding program data attribute in the digital set top box; if the analyzed program description is different from the corresponding program data attribute in the digital set top box, updating the corresponding program data attribute in the digital set top box;
s11, judging whether the audio and video PID of the program being played is updated;
and S12, if the judgment result in the step S7 is that the program is updated, the program being played is played again.
2. The method according to claim 1, wherein in step S3, if the digital set top box is playing a program for the first time, it is determined that the frequency point information corresponding to the program to be played is different from the frequency point information corresponding to the program being played.
3. The method of claim 1, wherein the cache data of each data table comprises program association table cache data, program mapping table cache data, service description table cache data, network information table cache data, and service group association table cache data; the real-time data of each data table comprises program association table real-time data, program mapping table real-time data, service description table real-time data, network information table real-time data and service group association table real-time data.
4. The method according to claim 3, wherein in step S7, the determining whether the real-time data of each data table is the same as the cache data corresponding to each data table comprises:
judging that at least one parameter of the real-time data of the program association table is different from at least one parameter of the cache data of the program association table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the program mapping table is different from at least one parameter of the cache data of the program mapping table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service description table is different from at least one parameter of the cache data of the service description table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the network information table is different from at least one parameter of the cache data of the network information table; alternatively, the first and second electrodes may be,
judging that at least one parameter of the real-time data of the service group association table is different from the cache data of the service group association table;
the parameters comprise the version number of the table, the number of sections contained in the table and the CRC value of the corresponding section in the table, and the version number of the table, the number of sections contained in the table and the CRC value of the corresponding section in the table are compared in sequence during judgment.
5. The method according to claim 3, wherein in step S9, when it is determined that the real-time data of each data table is different from the cache data corresponding to each data table, the real-time data of the program association table, the real-time data of the program mapping table, the real-time data of the service description table, the real-time data of the network information table and the real-time data of the service group association table are stored in corresponding cache spaces as the updated cache data of the program association table, the cache data of the program mapping table, the cache data of the service description table, the cache data of the network information table and the cache data of the service group association table, respectively.
6. The method according to claim 4, wherein in step S10, the parsing out the corresponding program description according to the updated buffer data of each data table includes:
according to the updated program association table cache data, analyzing the number of programs under the current frequency point, and updating the number of programs under the corresponding frequency point in the digital set top box;
according to the updated program mapping table cache data, analyzing the audio and video PID, the caption PID and the image-text PID of each program at the current frequency point, and updating the audio and video PID, the caption PID and the image-text PID of each program at the corresponding frequency point in the digital set top box;
analyzing the name and type of each program under the current frequency point according to the updated service description table cache data, and updating the name and type of each program under the frequency point corresponding to the digital set top box;
analyzing the logic serial number of each program in the network where the current frequency point is located according to the updated network information table cache data, and updating the logic serial number of each program belonging to the network in the digital set top box;
and analyzing the grouping information of each program in the network where the current frequency point is located according to the updated service group association table cache data, and updating the grouping information of each program belonging to the network in the digital set top box.
7. The method according to claim 1, wherein in step S10, when updating the corresponding program data attribute in the digital set-top box, only the place where the program data attribute is different from the parsed program description in the digital set-top box is updated; if the analyzed program description is the same as the corresponding program data attribute in the digital set-top box, no update is required.
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