CN115379255B - Hierarchical storage method based on data broadcast data organization - Google Patents
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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
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
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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
- H04N21/26266—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 determining content or additional data repetition rate, e.g. of a file in a DVB carousel according to its importance
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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
- H04N21/26283—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 associating distribution time parameters to content, e.g. to generate electronic program guide data
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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
- H04N21/454—Content or additional data filtering, e.g. blocking advertisements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a hierarchical storage method based on data broadcast data organization. The invention firstly adds a storage strategy list in the data broadcasting file, uses the storage strategy to identify the data priority, and the front end of the data broadcasting groups the data file into a main object carousel, a configuration object carousel, a main EPG object carousel and one or more extended EPG object carousels according to the storage strategy when broadcasting, and the set top box filters and analyzes the object carousel data and completes the data hierarchical storage according to hardware resources and the storage strategy. The invention uses the storage strategy identification to identify the programs, each program has the corresponding storage strategy, the data broadcasting service can be supported on the low-cost scheme, only a small amount of high-priority core data is needed to be filtered and stored, the filtering efficiency is improved, the normal operation and good experience of the data broadcasting service are ensured, and the good experience brought by the complete data broadcasting can be experienced when the cost is not limited or the scheme is expanded outside the memory.
Description
Technical Field
The invention belongs to the technical field of digital set top boxes, and particularly relates to a hierarchical storage method based on data broadcast data organization.
Background
DVB Project (Digital Video Broadcasting Project, digital video broadcasting organization) is an industry organization consisting of more than 300 members, which is initiated by a joint expert group consisting of the european telecommunication standardization organization, the european electronic standardization organization and the european broadcasting union. DVB (Digital Video Broadcasting ) is a series of internationally recognized digital television public standards maintained by DVB Project.
The DSM-CC (Digital Storage Media Command and Control, digital storage media command and control extension protocol) is an important component of the DVB (Digital Video Broadcasting ) standard. The DSM-CC OC (Object Carousel) is a broadcast service supporting a server to periodically transmit data modules to a user terminal, encapsulates data using a BIOP (broadcast inter-ORB protocol) format, and refers to the encapsulated data as an Object. Wherein the encapsulated data objects are repetitively broadcast in a broadcast data stream. By parsing these objects, it is possible to build a corresponding file directory and parse out the data of the corresponding object of the DSM-CC, such as pictures, texts, etc.
The front end of the data broadcasting network inserts NIT (Network Information Table ), BAT (Bouquet Association Table, service group association Table), PAT (Program Association Table ), PMT (Program Map Table, program map Table), SDT (Service Description Table ), TDT (Time & Date Table), and DSM-CC object carousel information into the transport stream for providing the data broadcasting service.
With the development of digital broadcast television, programs are more and more, the richness of the programs is higher and more, and more multimedia information including multilingual texts, pictures and even audios and videos is carried. The amount of data inserted in the transport stream by the data broadcast network front end is also increasing. In the data broadcasting service, a large amount of DSM-CC data exists, and the actually transmitted file catalogue and the files in the catalogue are respectively stored in different DSM-CC object carousel data. The data broadcast parsing process is complicated because the DSM-CC object carousel is periodically and circularly transmitted in the broadcast data stream. There are two implementations of traditional data broadcast services:
1. the method comprises the steps of receiving and analyzing data broadcast data in real time, filtering and analyzing the data in real time because the data is not prepared in advance, and filtering and storing the data in equipment generally because DSM-CC object carousel data is circularly transmitted in the broadcast data, so that the data acquisition speed is low, the customer experience is poor;
2. the problem of slow data request can be solved by storing all the data broadcast data after receiving and analyzing, and a large space is usually required to be opened up in the memory for receiving the DSM-CC object carousel data, and the corresponding file is stored after analyzing. Since the DSM-CC object carousel data in the conventional data broadcast service is not optimized, all the data needs to be filtered and stored, and both the memory and the storage capacity are required. There are limitations in use on low cost products, which are generally not available.
The low-cost set top box cannot configure a large-capacity memory and storage due to the cost problem, so that data broadcasting cannot be received or all the data broadcasting cannot be stored after receiving and analyzing. The low-cost set-top box cannot support the data broadcasting service due to the limitations, or is unfavorable for the popularization and sales of the product due to poor experience even if the data broadcasting service is supported.
Disclosure of Invention
The invention aims to solve the problem of using data broadcasting on a low-cost set top box, and provides a hierarchical storage method based on data broadcasting data organization, so that the low-cost set top box supports data broadcasting service and obtains better use experience.
The invention aims at being realized by the following technical scheme:
the data broadcasting service of the present invention provides rich text extension services such as program listings, program information, electronic Program Guides (EPGs), and multi-language translations based on data files.
The data file transmitted in the data broadcast includes: a main index file, a data broadcast configuration file, a program data file, a program list data file, and an EPG data file;
the main index file comprises all data broadcast service data file descriptions, each file description comprises a file type, a time stamp, object carousel data channel information and a file path, and if the file type is an EPG type, the file description also comprises time range information; the main index file is used for managing all data files, wherein the time stamp indicates whether each data file is updated, and the object carousel data channel information indicates a data channel of an object carousel where the data file is located; the main index file is an index and an entry of the whole data;
the data broadcast configuration file comprises a service type list, a program classification list, an EPG event classification list and a storage strategy list, wherein each list has a unique ID (identity) for identifying attribute information of a program or an EPG event; the method comprises the steps that a service type list is used for identifying the video or audio type of a program, a program classification list is used for identifying the type of the program, an EPG event classification list is used for identifying the type of an EPG event, a storage strategy list is used for identifying a program storage strategy, and the program data is stored according to the storage strategy defined by the type when being processed, namely, the hierarchical storage of the data is completed according to the identification;
the program data file comprises all program information provided by a data broadcasting service, and each program information comprises program frequency point information, program Logo, program name multi-language information and service type information;
the program list data file comprises program list Logo, program list multilingual information, program list brief introduction, program ordering information, program classification information and storage strategy information;
the EPG data file comprises all EPG event information provided by a data broadcasting service, and each piece of event information comprises event Logo, event name, detailed description, starting time, duration and event classification information.
Supporting data hierarchical storage through the storage strategy list and the storage strategy information;
according to the composition of the data broadcast service data file, the EPG event information and the program Logo occupy resources with larger proportion.
The data broadcasting front end divides program Logo and EPG event information data in a data broadcasting service into two types: high priority data and low priority data; the high-priority data is core data of the data broadcasting service and is stored in the internal memory to support normal use of the data broadcasting service; the low-priority data is non-core data of the data broadcasting service, the data broadcasting service is not affected when the low-priority data is missing, the experience of the data broadcasting service can be improved when the low-priority data exists, and the low-priority data is stored in an external memory or is not stored when the storage resources are limited;
the storage strategy list defines the storage strategy of the data, the storage strategy list is defined by a group of storage strategies, and each storage strategy definition comprises a storage strategy identifier, a program Logo storage selection, an EPG high-priority event duration, an EPG event Logo storage selection and an EPG event detailed description storage selection;
the storage strategy identifier is a unique ID and is used for identifying the storage strategy, the storage strategy identifier is used for identifying the program, and the identified program stores data according to the designated storage strategy;
the program Logo stores data which is selected to identify whether the program Logo is high priority or not;
the duration of the EPG high-priority event indicates that the EPG event is a high-priority event when the starting time of the EPG event is within the duration, otherwise the EPG event is a low-priority event, the high-priority event is selected by the EPG event Logo storage and the EPG event detailed description storage selection identification data, and the low-priority event carrying data are all low-priority data;
the EPG event Logo stores data which is selected to identify whether the EPG event Logo is high priority or not;
the EPG event detailed description storage selects whether the EPG event detailed description is high priority data or not;
the front end of the data broadcast packages the data file into a main object carousel, a configuration object carousel, a main EPG object carousel and one or more extended EPG object carousels according to a storage strategy during broadcasting;
the main object carousel only comprises a main index file and a data broadcasting service entry;
the configuration object carousel comprises a data broadcast configuration file, a program data file, a program list data file and a picture; the storage strategy information in the program list data file is used for hierarchically storing data;
the method comprises the steps that in a data broadcasting service, EPG data is maximum, a large number of events and high-quality EPG event Logo picture files are included, EPG data with specified duration is used as high-priority data to be put into a main EPG object carousel according to a defined storage strategy, and other EPG data are used as low-priority data to be put into an extended EPG object carousel; the low priority EPG data is split into a plurality of expanded EPG object carousels according to the amount of data. The method has the advantages that when storage resources are limited and low-priority data are not needed, the method can not filter and expand EPG object carousel, only filter main EPG object carousel, and compared with the traditional technical scheme, the method improves filtering efficiency.
When the set top box starts the data broadcasting service, the hierarchical storage flow is as follows:
(1) The set top box filters and receives the main object carousel data, analyzes the main index file and acquires the index of the whole data broadcasting service data file;
(2) The set top box filters and receives the configuration object carousel data, analyzes the data broadcast configuration file, acquires a storage strategy list in the data broadcast configuration file, and carries out hierarchical storage processing on the program information in the configuration object carousel according to the storage strategy;
(3) The set top box filters and receives EPG object carousel data, and the following three processing modes exist according to the hardware resources of the set top box and the conditions of an external memory:
a. when the configuration is low and no external memory exists, only filtering and receiving the main EPG object carousel data, and storing the high-priority data into the internal memory according to a storage strategy;
b. when the configuration is low and the external memory is provided, filtering and receiving the main EPG object carousel data, storing the high-priority data into the internal memory according to a storage strategy, and storing the low-priority data into the external memory; filtering and receiving the carousel data of the expanded EPG object, and storing the data into an external memory;
c. receiving all EPG object carousel data and storing the data into an internal memory when in high configuration;
(4) And finishing the hierarchical storage of the data broadcasting service.
The technical key points of the method mainly comprise:
1. firstly, a data broadcasting configuration file needs to be added in a data broadcasting service, wherein the data broadcasting configuration file comprises a storage strategy list used for identifying program strategy, and when program data are processed, data broadcasting resource storage is carried out according to the storage strategy defined by the type, namely, hierarchical storage of the data is completed according to the identification.
2. The data broadcasting front end packages the data file group into a main object carousel, a configuration object carousel, a main EPG object carousel and one or more extended EPG object carousels according to a storage strategy during broadcasting. The main object carousel only comprises a main index file and is a data broadcasting service entry; the configuration object carousel comprises a data broadcast configuration file, a program data file, a program list data file and a corresponding Logo picture file, wherein the program carries storage strategy information for storing the program Logo in a grading manner; the maximum EPG data volume in the data broadcasting service comprises a large number of events and high-quality EPG event Logo picture files, and EPG data with appointed duration is used as high-priority data to be put into main EPG object carousel according to a defined storage strategy; and other EPG data is used as low-priority data to be put into the expanded EPG object carousel, and the data can be split into a plurality of object carousels according to the data quantity. The method has the advantages that when storage resources are limited and low-priority data are not needed, the method can not filter and expand EPG object carousel, only filter main EPG object carousel, and compared with the traditional technical scheme, the method improves filtering efficiency.
3. When the set top box uses the data broadcasting service, the main object carousel and the configuration object carousel are filtered firstly, program information in the configuration object carousel is stored according to the storage strategy according to the hardware of the set top box, the peripheral storage condition and the storage strategy, and then the data broadcasting EPG data filtering storage range is determined according to the hardware of the set top box, the peripheral storage condition and the storage strategy: when the configuration is low and no external memory exists, only filtering and receiving the main EPG object carousel data and storing the high-priority data to the internal memory according to a storage strategy; when the configuration is low and the external memory is provided, the filtering receives the main EPG object carousel data, stores the high-priority data to the internal memory according to the storage strategy, and stores the low-priority data to the external memory. Filtering and receiving the carousel data of the expanded EPG object and storing the data into an external memory; and receiving all EPG object carousel data and storing the data to an internal memory when in high configuration.
4. Through the technical scheme, under the condition that the same data broadcasting front end is used, only simple adjustment is needed, the storage strategy identification is used for identifying the programs, each program has the corresponding storage strategy, so that the high-configuration set top box can be supported, the data broadcasting service can also be supported on a low-cost scheme, when the low-cost scheme does not have an external storage, only a small amount of high-priority core data is needed to be filtered and stored, the filtering efficiency is improved, and the normal operation and good experience of the data broadcasting service are ensured. The good experience brought by the complete data broadcasting can be experienced when the cost is not limited or the memory is expanded in a low-cost mode.
By adopting the method, under the condition of using the same data broadcasting front end, only simple adjustment is needed, the programs are marked by using the storage strategy marks, each program has the corresponding storage strategy, so that the high-configuration set top box can be supported, the data broadcasting service can also be supported on a low-cost scheme, and when the low-cost scheme has no external storage, only a small amount of high-priority core data is needed to be filtered and stored, so that the filtering efficiency is improved, and the normal operation and good experience of the data broadcasting service are ensured. The good experience brought by the complete data broadcasting can be experienced when the cost is not limited or the memory is expanded in a low-cost mode.
The hierarchical storage method provided by the invention has the advantages that the application range of the data broadcasting service is increased, the low-cost set top box supports the data broadcasting service and obtains better use experience. The invention firstly needs to add a data broadcasting configuration file in the data broadcasting service, wherein the data broadcasting configuration file comprises a storage strategy list used for identifying program strategy, and when processing program data, the data broadcasting resource storage is carried out according to the storage strategy defined by the type, namely, the hierarchical storage of the data is completed according to the identification.
The data broadcasting front end packages the data file group into a main object carousel, a configuration object carousel, a main EPG object carousel and one or more extended EPG object carousels according to a storage strategy during broadcasting.
When the set top box uses the data broadcasting service, the main object carousel and the configuration object carousel are filtered firstly, program information in the configuration object carousel is stored according to the storage strategy according to the hardware of the set top box, the peripheral storage condition and the storage strategy, and then the data broadcasting EPG data filtering storage range is determined according to the hardware of the set top box, the peripheral storage condition and the storage strategy: when the configuration is low and no external memory exists, only filtering and receiving the main EPG object carousel data and storing the high-priority data to the internal memory according to a storage strategy; when the configuration is low and the external memory is provided, the filtering receives the main EPG object carousel data, stores the high-priority data to the internal memory according to the storage strategy, and stores the low-priority data to the external memory. Filtering and receiving the carousel data of the expanded EPG object and storing the data into an external memory; and receiving all EPG object carousel data and storing the data to an internal memory when in high configuration.
By adopting the method, under the condition of using the same data broadcasting front end, only simple adjustment is needed, the programs are marked by using the storage strategy marks, each program has the corresponding storage strategy, so that the high-configuration set top box can be supported, the data broadcasting service can also be supported on a low-cost scheme, and when the low-cost scheme has no external storage, only a small amount of high-priority core data is needed to be filtered and stored, so that the filtering efficiency is improved, and the normal operation and good experience of the data broadcasting service are ensured. The good experience brought by the complete data broadcasting can be experienced when the cost is not limited or the memory is expanded in a low-cost mode.
Drawings
FIG. 1 is a schematic diagram of the overall process of the method of the present invention;
FIG. 2 is a schematic diagram of an organization structure of data broadcast according to the present invention;
fig. 3 is a flow chart of hierarchical storage of data broadcast by the set-top box of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the drawings.
As shown in fig. 1, the hierarchical storage method based on the data broadcast data organization specifically comprises the following steps: because EPG event information and program Logo occupy resources with larger proportion, program Logo and EPG event information data in data broadcasting service are classified into two types according to the composition of data broadcasting service data files: high priority data and low priority data. The high priority data is core data of the data broadcasting service and needs to be stored in the memory to support normal use of the data broadcasting service; the low priority data is non-core data of the data broadcasting service, the data broadcasting service is not affected when the low priority data is missing, the experience of the data broadcasting service can be improved when the low priority data exists, and the low priority data is stored in an external memory or is not stored when the storage resource is limited.
Firstly, a storage strategy list is added in a data broadcasting configuration file of a data broadcasting service and is used for identifying a data storage strategy, the priority of the data is identified by using the storage strategy, and when the data is processed, the data broadcasting resource is stored according to the storage strategy defined by the type, namely, the hierarchical storage of the data is completed according to the identification. One storage policy definition is described as follows:
id is the identification item: the program storage strategy identification method comprises the steps that a program storage strategy is used for identifying programs, and the identified programs store data according to the designated storage strategy;
ischannel logo optional: for identifying whether the program Logo is high priority data;
isepgooopsitional: for identifying whether the EPG event Logo is high priority data;
isepggdescriptionoperative: for identifying whether the EPG event detailed description is high priority data;
minupgdescription: the method comprises the steps of storing selection identification data by an EPG event Logo and detailed description of the EPG event, wherein the selection identification data is used for representing a high-priority event when the starting time of the EPG event is within the duration; otherwise, the event is a low priority event, and the event carried data are all low priority data.
Taking the embodiment storage strategy as an example, the program Logo is high-priority data, the EPG event detail is high-priority data, the EPG event is high-priority event within the MinEPGDura duration, namely within 48 hours, and the EPG event Logo storage selection and the EPG event detail description storage selection identification data. Other EPG events are low priority events, where the event-carried data are low priority data.
And adding a storage strategy list into the data broadcasting configuration file, and completing data broadcasting data identification by using the storage strategy identification. As shown in fig. 2, the data broadcasting front end packages the data file packets into a main object carousel, a configuration object carousel, a main EPG object carousel, and one or more extended EPG object carousels according to a storage policy at the time of broadcasting.
The main object carousel only contains the main index file, which is the data broadcasting service entry. The main index file contains all data broadcast service data file descriptions, each file description comprises a file type, a time stamp, object carousel data channel information and a file path, and the EPG type information file also comprises time range information.
The configuration object carousel comprises a data broadcast configuration file, a program data file, a program list data file and a corresponding Logo picture file, wherein the program carries storage strategy information for storing the program Logo in a grading manner, and the detailed file information is as follows:
the data broadcasting configuration file includes a service type list, a program classification list, an EPG event classification list, and a storage policy list, each of which has a unique ID for identifying a program or EPG event related attribute information. The service type list is used for identifying the video or audio type of the program, the program classification list is used for identifying the program type, the EPG event classification list is used for identifying the EPG event type, the storage strategy list is used for identifying the program storage strategy, and the program data is stored according to the storage strategy defined by the type when being processed, namely, the hierarchical storage of the data is completed according to the identification.
The program data file comprises all program information provided by the data broadcasting service, and each program information comprises program frequency point information, program Logo, program name multilingual information and service type information.
The program list data file comprises program list Logo, program list multilingual information, program list profile, program ordering information, program classification information and storage strategy information.
The main EPG object carousel comprises EPG high-priority data files with storage strategy appointed time length, and specific data is identified by EPG event Logo storage selection and EPG event detailed description storage selection.
The expanded EPG object carousel comprises other EPG low-priority data files, and can be split into a plurality of object carousels according to the data volume.
The EPG data file includes all EPG event information provided by the data broadcasting service, and each event includes event Logo, event name, detailed description, start time, duration, and event classification information.
The front end of the data broadcast packages the file into object carousel data according to the structure and then broadcasts the object carousel data.
Fig. 3 is a flow chart of hierarchical storage of data broadcast by a set top box, and the flow of receiving and storing the data broadcast service data by the set top box in a hierarchical manner is as follows:
the method comprises the steps of (1) starting a data broadcasting service, filtering and receiving a main object carousel, analyzing a main index file to obtain all data broadcasting service data file descriptions, wherein each file description comprises a file type, a time stamp, object carousel data channel information and a file path, and an EPG type information file further comprises time range information;
step (2) using the information obtained in the step (1) to filter and receive the configuration object carousel, analyzing the data broadcast configuration file to obtain a storage strategy list for analyzing the subsequent storage strategy information;
step (3) analyzing the program data files and the program list data files in the configuration object carousel obtained in the step (2) for hierarchical storage of the subsequent program data;
step (4) judging whether the hardware resource of the set top box is in high configuration, if so, executing the step (5), otherwise, executing the step (6);
step (5) the storage resources are sufficient at the moment, the storage strategy of the program data is not needed to be judged, all the program data in the configuration object carousel are directly stored into an internal memory, and the step (9) is executed;
step (6) is limited in storage resources and requires complete hierarchical storage of program data according to the identified storage policy. Traversing the storage strategy information of each program in the program list data file, storing the program Logo marked as high-priority data into an internal memory and executing the step (7);
step (7) judging whether the set top box has an external memory or not, if so, executing the step (8), otherwise, executing the step (9);
and (8) at the moment, the set top box has an external memory, and the program Logo marked as low-priority data is stored in the external memory so as to improve the data broadcasting experience. Traversing the storage strategy information of each program in the program list data file, and storing the program Logo marked as low-priority data into an external memory;
step (9) using the information obtained in the step (1) to filter and receive the main EPG object carousel;
step (10) judging whether the hardware resource of the set top box is in high configuration, if so, executing step (11), otherwise, executing step (12);
step (11) the storage resources are sufficient at the moment, and all EPG data in the main EPG object carousel are directly stored into an internal memory and the step (15) is executed without judging the storage strategy of the EPG data;
step (12) is limited in storage resources and requires the hierarchical storage of EPG data according to the identified storage policy. Traversing the storage policy information of each event in the EPG data file, storing the EPG data identified as high priority data into an internal memory and executing step (13);
step (13) judging whether the set top box has an external memory or not, if so, executing step (14), otherwise, executing step (20);
and (14) the set top box has an external memory, and EPG data marked as low-priority data is stored in the external memory, so that the data broadcasting experience is improved. Traversing the storage strategy information of each event in the EPG data file, and storing the EPG data marked as low-priority data into an external memory;
step (15) using the information obtained in the step (1) to filter and receive the expanded EPG object carousel;
step (16) judging whether the hardware resource of the set top box is in high configuration, if so, executing step (17), otherwise, executing step (18);
step (17), low priority data are all in the expanded EPG object carousel, at the moment, storage resources are sufficient, all EPG data in the expanded EPG object carousel are directly stored into an internal memory, and step (19) is executed;
step (18) the low priority data in the expanded EPG object carousel, and all EPG data in the expanded EPG object carousel are stored in an external memory;
step (19) judges whether the set top box finishes the carousel filtering processing of all the extended EPG objects, if yes, the step (20) is executed, otherwise, the step (15) is executed;
and (20) finishing hierarchical storage of the data broadcasting service.
Claims (4)
1. The hierarchical storage method based on the data broadcasting data organization is characterized in that the data broadcasting service is based on DSM-CC object carousel, and the data broadcasting data organization is specifically as follows:
the data files transmitted in the data broadcast include a main index file, a data broadcast configuration file, a program data file, a program list data file, and an EPG data file;
the main index file comprises all data broadcast service data file descriptions, each file description comprises a file type, a time stamp, object carousel data channel information and a file path, and when the file type is an EPG type, the file description also comprises time range information;
the data broadcast configuration file comprises a service type list, a program classification list, an EPG event classification list and a storage strategy list, wherein each list has a unique ID (identity) for identifying attribute information of a program or an EPG event;
the program data file comprises all program information provided by a data broadcasting service, and each program information comprises program frequency point information, program Logo, program name multi-language information and service type information;
the program list data file comprises program list Logo, program list multilingual information, program list brief introduction, program ordering information, program classification information and storage strategy information;
the EPG data file comprises all EPG event information provided by a data broadcasting service, wherein each piece of event information comprises event Logo, event name, detailed description, starting time, duration and event classification information;
the data broadcasting front end divides program Logo and EPG event information data in a data broadcasting service into two types: high priority data and low priority data; the high priority data is core data of the data broadcasting service and is stored in the internal memory; the low-priority data is non-core data of the data broadcasting service, and is stored in an external memory or not when the storage resources are limited;
the storage strategy list defines the storage strategy of the data, the storage strategy list is defined by a group of storage strategies, and each storage strategy definition comprises a storage strategy identifier, a program Logo storage selection, an EPG high-priority event duration, an EPG event Logo storage selection and an EPG event detailed description storage selection;
the storage strategy identifier is a unique ID and is used for identifying the storage strategy, the storage strategy identifier is used for identifying the program, and the identified program stores data according to the designated storage strategy;
the program Logo stores data which is selected to identify whether the program Logo is high priority or not;
the duration of the EPG high-priority event indicates that the EPG event is a high-priority event when the starting time of the EPG event is within the duration, otherwise the EPG event is a low-priority event, the high-priority event is selected by the EPG event Logo storage and the EPG event detailed description storage selection identification data, and the low-priority event carrying data are all low-priority data;
the EPG event Logo stores data which is selected to identify whether the EPG event Logo is high priority or not;
the EPG event detailed description storage selects whether the EPG event detailed description is high priority data or not;
the front end of the data broadcast packages the data file into a main object carousel, a configuration object carousel, a main EPG object carousel and one or more extended EPG object carousels according to a storage strategy during broadcasting;
the main object carousel only comprises a main index file and a data broadcasting service entry;
the configuration object carousel comprises a data broadcast configuration file, a program data file, a program list data file and a picture; the storage strategy information in the program list data file is used for hierarchically storing data;
according to the defined storage strategy, EPG data with specified duration is used as high-priority data to be put into a main EPG object carousel, and other EPG data is used as low-priority data to be put into an extended EPG object carousel;
when the set top box starts the data broadcasting service, the hierarchical storage flow is as follows:
(1) The set top box filters and receives the main object carousel data, analyzes the main index file and acquires the index of the whole data broadcasting service data file;
(2) The set top box filters and receives the configuration object carousel data, analyzes the data broadcast configuration file, acquires a storage strategy list in the data broadcast configuration file, and carries out hierarchical storage processing on the program information in the configuration object carousel according to the storage strategy;
(3) The set top box filters and receives EPG object carousel data, and the following three processing modes exist according to the hardware resources of the set top box and the conditions of an external memory:
a. when the configuration is low and no external memory exists, only filtering and receiving the main EPG object carousel data, and storing the high-priority data into the internal memory according to a storage strategy;
b. when the configuration is low and the external memory is provided, filtering and receiving the main EPG object carousel data, storing the high-priority data into the internal memory according to a storage strategy, and storing the low-priority data into the external memory; filtering and receiving the carousel data of the expanded EPG object, and storing the data into an external memory;
c. receiving all EPG object carousel data and storing the data into an internal memory when in high configuration;
(4) And finishing the hierarchical storage of the data broadcasting service.
2. The hierarchical storage method based on data broadcasting data organization according to claim 1, wherein: the storage strategy list is used for identifying the program storage strategy, and the program data is stored according to the storage strategy defined by the type when being processed, namely, the hierarchical storage of the data is completed according to the identification.
3. The hierarchical storage method based on data broadcasting data organization according to claim 1, wherein: and supporting data hierarchical storage through the storage strategy list and the storage strategy information.
4. The hierarchical storage method based on data broadcasting data organization according to claim 1, wherein: and according to the defined storage strategy, the EPG data with the appointed duration is used as high-priority data to be put into the main EPG object carousel, and other EPG data are used as low-priority data to be split and put into a plurality of extended EPG object carousels.
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