CN103179440B - Value-added service time-shifted television system facing 3G users - Google Patents

Abstract

The invention discloses a value-added service time-shifting television system oriented to 3G users, belonging to the technical field of mobile communication network services. The system of the present invention includes a time-shift service module, a value-added service module, a program list database module, and an interactive management module; the time-shift service module is used for making time-shift audio and video data; the value-added service module is used for making value-added service audio and video content data , mining popular and valuable video content from time-shifted video streams for secondary storage; program list database module is used to generate, manage and maintain time-shifted program list database and value-added service program list database; interaction The management module is responsible for direct interaction with users, receiving, responding and counting the request information from users. The invention is driven by users to establish a value-added service chain, while better reflecting the needs and preferences of users, it highlights the personalization and service diversification of 3G services, and expands the new field of value-added services of the mobile Internet.

Description

A time-shifted TV system for value-added services for 3G users

technical field

The invention relates to a value-added service time-shifting television system oriented to 3G users, and belongs to the technical field of mobile communication network services.

Background technique

In recent years, the broadband wired network streaming media application has made great progress, and the streaming media technology based on the mobile communication network has gradually developed. With the rapid development and maturity of 2.5G, 3G and other high-speed mobile communication technologies and wireless local area networks, various mobile terminals such as smart phones and PADs are constantly being introduced, and the mobile phone value-added service market is also constantly developing new application service fields. Constant pursuit of diversified personalized services, the mobility of mobile terminals has brought about the diversification of viewing habits, and the live broadcast and on-demand services in traditional mobile streaming media have been unable to meet the individual needs of users. At the same time, the Internet-based network time-shift TV technology is becoming more and more mature, which provides a new idea for us to develop diversified value-added services in the mobile streaming media market.

In the streaming media network, Time Shift TV has opened up a brand new TV service platform, which transfers the freedom of viewing to users. Users are no longer limited by the broadcast time of programs, and can watch missed TV programs according to their own time. , and arbitrarily fast forward and rewind. However, in view of the mobility of smart phone terminal users and the limitations of smart devices, the existing time-shifted TV services cannot well meet the diverse needs of users. Time-shifted TV based on mobile streaming media driven by 3G users is a time-shifted TV implementation scheme designed from the perspective of user practicability and flexibility under such a demand environment.

At present, in the process of time-shifted TV services for mobile users, there is a lack of user-led flexibility and diversity, and users can only passively receive video files provided by the server; user access to video data is completely independently generated by the server, without considering user viewing habits and preferences; at the same time, there is a lack of a user-oriented service system for videos with high popularity, so as to improve the user's personalized service experience.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the existing mobile communication time-shift TV system, and provide a value-added service time-shift TV system for 3G users. Statistics, analysis and synthesis of history, current visits and user behavior preferences, dig out valuable video content with high visit popularity coefficient, generate value-added videos, and provide users with richer mobile personalized services.

The value-added service time-shift television system for 3G users of the present invention includes a time-shift service module, a value-added service module, a program list database module, and an interactive management module; the time-shift service module is used for making time-shift audio and video data; The value-added business service module is used for the production of value-added business audio and video content data, digs out popular and valuable video content from time-shifted video streams, and performs secondary storage; the program list database module is used to generate 1. Manage and maintain the time-shifted program list database and the value-added service program list database; the interaction management module is responsible for direct interaction with users, receiving, responding and counting request information from users.

1. The added value

The business service module includes a local value-added service program list database; the value-added service module uses a self-learning method to produce value-added service audio and video content data, specifically as follows: After the value-added service module receives the user access statistics and analysis information from the interactive management module, it first performs Self-study, find out whether the local value-added service program list database contains video content that matches the access information provided by the interaction management module, that is, the program whose access popularity coefficient provided by the interaction management module is greater than a preset threshold, the program’s The access popularity coefficient is the ratio of the number of visits to the total number of visits of the program in a period; if not, the item of the program is added in the local value-added service program list database, and the time-shifted video data stream of the program is shifted from the time-shifted Read in the value-added service service module in the service module, generate value-added service video content; If there is, then update the survival time of this program in the local value-added service program list database; The business service module needs to submit a new value-added service program list to the program list database module for refreshing the value-added service program list in the program list database.

The survival time values of the programs in the value-added service program list database are calculated using the ZiPf law: first, the value-added programs are arranged in descending order according to their popularity coefficient values; next, the ZiPf law is used to calculate the time of each program in the sorted list at a certain point in the future. The probability value of being visited by the next user; then, multiply this probability value by the maximum survival time, plus two preset basic survival times: time-shifted basic survival time and value-added basic survival time, to set the value-added program survival time.

Compared with existing implementation schemes, the obvious effects of the present invention are:

From the user's point of view, give mobile users sufficient flexibility and free space, build a value-added service chain driven by users, tap potential high-value video resources, better reflect the needs and preferences of users, and highlight the new situation The personalization and service diversification of 3G services have expanded the new field of value-added services of the mobile Internet.

Description of drawings

Fig. 1 is the block diagram of the value-added service time-shift TV system facing 3G users in the specific embodiment of the present invention;

Fig. 2 is a schematic diagram of an implementation of the time-shift service module of the present invention;

Fig. 3 is a schematic diagram of an implementation scheme of the value-added business service module of the present invention;

Fig. 4 is a schematic diagram of an implementation scheme of the program list database module of the present invention;

Fig. 5 is a schematic diagram of an implementation of the interaction management module of the present invention;

Fig. 6 is the signal processing flowchart of the video acquisition card adopted in the specific embodiment of the present invention;

Fig. 7 is a schematic diagram of the work flow of the value-added service time-shifted TV system for 3G users of the present invention.

detailed description

The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

Since live programs cannot cater to all users in terms of time, webcasting includes mobile webcasting or on-demand broadcasting for mobile users, which cannot fully describe user preferences and the popularity of a certain program content. For this reason, the value-added service time-shift TV system for 3G users of the present invention is based on the mobile streaming media time-shift service, and through the statistics, analysis and synthesis of the mobile user's access history, current access situation and user's behavior preference, Dig out valuable video content with high access popularity coefficient, generate value-added videos, and provide users with richer mobile personalized services.

The value-added service time-shift TV system facing 3G users of the present invention, its overall realization scheme is as follows:

The system includes a time-shifting service module, a value-added service module, a program list database module, and an interactive management module.

The time-shifting service module is used to make time-shifted audio and video data, including a collection sub-module, an encoding sub-module, a storage sub-module and an update sub-module.

In the above-mentioned time-shifting service module, the acquisition sub-module is responsible for the reception and acquisition of radio and television live TV signals; the acquisition sub-module accesses the real-time live TV signal through the video acquisition card, and generates continuous and uncompressed Digital video and audio data in YUV2 video format and PCM audio format, and store them in the acquisition buffer of the internal memory, for subsequent operations such as encoding and storing the audio and video signals to complete the video acquisition process; the acquisition program in the acquisition sub-module is all-weather Run to ensure the normal real-time acquisition of the video capture card; the data in the buffer should be deleted in time after being read.

In the above-mentioned time-shift service module, the encoding sub-module completes the encoding processing of the collected digital video and audio data, compresses redundant data, saves storage space and transmission bandwidth; The received digital YUV2 video and PCM audio data are hardware-encoded into the video format of MPEG4 and the audio format of AAC, and are stored in the buffer of the encoding module in the shared memory for the following storage module to read; the data in the buffer , should be deleted in time after being read.

In the above-mentioned time-shift service module, the storage submodule is used to store the encoded MP4 video data in the local designated disk device, and set up an index structure to generate a time-shift video library; run the storage in the storage submodule The program reads the encoded MP4 audio and video data from the encoding cache of the shared memory and stores them in the specified storage path of the local disk; the storage of MP4 audio and video data follows: "root directory/channel number/program play date/program play Time-fragment number. File format (MP4)" directory format is stored; Described video file fragmentation, carries out fragmentation according to the fixed size of a TS data flow, and the file size of each fragmentation is 188 bytes, And several slices are stored as a storage unit; the index structure is stored under the specified index directory of the storage submodule with binary format data, and is divided into channel number, date, program playing time, slice number and There are five levels of video key frames; when reading encoded data, the storage sub-module reads audio and video data of several coding units at a time, instead of real-time reading; the storage sub-module assigns each stored time-shifted audio and video data a Survival time, the video source will be automatically deleted after the time-shift service period is exceeded.

In the above-mentioned time-shift service module, the update sub-module is used to update the time-shift video content stored in the time-shift storage disk; the update function includes operations such as addition of stored video content and deletion of aging video content ; The new operation is collected in real time by the video capture card that operates around the clock. After being encoded by the encoding sub-module, the time-shifting storage sub-module reads it into the specified storage disk directory and stores it according to the storage rules; the deletion sub-module is responsible for storing the secondary The aging time-shifted audio and video files in the disk are deleted to free up physical storage space; after the deletion operation is executed, the program will periodically (such as every morning) scan the attribute values of each audio and video file, that is, the creation time, current Computer system time, for video files and folders whose difference between system time and creation time exceeds the given time shift service time period, the deletion program will delete the video files; the disk space management program is responsible for reclaiming and managing the transferred files Disk space is used to store new time-shifted video content and improve disk space utilization.

The value-added business service module is used for the production of value-added business audio and video content data, digs out popular and valuable video content from time-shifted video streams, and performs secondary storage to provide users with diverse personalities services. Value-added business audio and video content is obtained by self-learning method: run the value-added business service module program, and perform self-study after receiving statistical analysis information of user access from the interactive management module, and search for local value-added business programs of the value-added business service module Single database, whether there is any video content matching the programs with high access popularity coefficient value provided by the interactive management module; The stream is read to the local disk path of the value-added service, and the video content of the value-added service is generated; if there is, the item of the local value-added program list is updated, mainly updating the value field of the program survival time. Whenever the value-added service program list is updated, the value-added service service module needs to submit the program list to the program list database module for refreshing the value-added service program list in the program list database.

In the above-mentioned value-added business service module, the detailed steps of making the value-added business video by the self-learning method are: the running value-added business service module program receives the statistical analysis information of the regular user visits from the interaction management module, and the information includes: Time-shifted program (or value-added service program) channel number, broadcast date and time, access popularity coefficient value, value-added service program survival time, value-added update counter and other information; after receiving the regular statistical analysis letter, perform the following steps: Verify each item of statistical analysis information item by item, if the program does not exist in the original value-added program list database, then add the program list item to the local value-added program list database, and give the program a survival time according to the access coefficient value, value-added The update counter is assigned a value of 1, and at the same time, the corresponding time-shifted video content is read and written to the specified storage path of the local value-added service disk, and the storage rule follows the storage submodule; if the local value-added service program list database has the program list item, then Recalculate a new survival time value based on the access popularity coefficient value of the project and the old survival time field value to prolong the survival time of the program, and increase the value-added update counter by 1; the value-added update counter is not updated for two consecutive basic survival times video, the program list and program video content of the video file will be deleted.

In the above-mentioned value-added service module, the lifetime of the value-added service program is used to mark the storage time of the program in the value-added service local disk; the TTL value of the program's lifetime is calculated using the ZiPf law; The access popularity coefficient value of each program ranks all value-added programs in descending order. For the Kth program in the ranking, use the ZiPf law to calculate the probability value of the program being accessed by the next user; multiply this probability value by the maximum survival Time TTL _max , plus two basic survival times: time-shifted basic survival time and value-added basic survival time, as the survival time value of a program; the maximum survival time TTL _max is set to the size of the five value-added basic survival time values .

In the above value-added service module, the local value-added service program list items include program channel number, broadcast date and time, program access popularity coefficient value, value-added update counter, program survival time value, program creation time and other information.

The program list database module is used to generate, manage and maintain the time-shifted program list database and the value-added service program list database; by running the program list production program, the electronic program list of live TV channels is downloaded from the website, the program list is analyzed and useful information is extracted. Information, including: channel name, date, program start time and program end time, program name, stored in the local disk device in the form of table data; the value-added service program list database, according to the value-added service module submitted Program information, generate the value-added program list of the program list database module and store it in the local disk device; the aging program item information in the time-shifted program list database needs to be deleted after the time-shift service period expires. If the content needs to be added, the time-shifted program database should be updated first, and then the time-shifted storage disk should be updated; the value-added program database only needs to update the value-added program information in the program database according to the value-added program information submitted by the value-added business service module, here In the process, the deletion of the value-added program database is completed.

As an intermediary module, the interaction management module completes the interactive access work between the user and the background server, monitors statistics and analyzes the user's access information at the same time, and provides a theoretical numerical basis for the production of value-added service videos; the interaction management module is responsible for direct communication with the user. Interaction, receiving various request information from users, including: request for time-shifted program list, request for value-added service program list, request for time-shifted video content, request for value-added service video content, and respond to the above-mentioned various requests of users at the same time; As an intermediary module, the interaction management module, after receiving the user's request information, completes the query of the user request information and reads it into the shared buffer of the interaction management module, and finally feeds back the read user request content to the user The interactive management module is responsible for interacting with each module in the background, interacting with the program list database module to complete the query and read the entries in the program list data, and interacting with the time shift service module to complete the query and reading of the time shift video content It interacts with the value-added service module to complete the query and reading of the value-added service video content; while the interactive management module reads the value-added video program, it needs to record all the attribute information of the value-added program, and refresh the access popularity coefficient of the value-added video at the same time value; the interactive management module monitors and counts the user's access to each time-shifted program or value-added program in each measurement cycle, records its access times and all access times in this cycle, and monitors the number of visits of a certain video in the cycle. The ratio of the number of visits to the total number of visits is the visit popularity coefficient of a certain time-shifted video, which reflects the popularity of a certain video content; at the end of each monitoring period, for programs greater than the threshold preset by the system Statistical information is submitted to the value-added business service module by the interaction management module.

In the above-mentioned interactive management module, the user access information is the monitoring and statistical information submitted to the value-added service module, mainly including: program channel number, program broadcast date and broadcast time, program name, program access popularity coefficient value , Time-shift storage path information of program content, etc.

In the implementation plan of the time-shift value-added service TV system facing 3G users, the storage device is a hard disk; the human-computer interaction interface used to complete the user, background function module and interactive management module includes keyboard, mouse, sound card, display, PCI interface and a network interface; the network interface includes an Ethernet interface and a WLAN interface.

In the implementation plan of the time-shift value-added service TV system for 3G users, the release of the program content adopts the P2P transmission mode, and provides personalized video services for users through the network interface; the program list database module records a time-shift service cycle within 7 days The time-shifted program information table data of all the program channels in the network interface provides the program list information to the client user through the network interface.

In the implementation scheme of the time-shift value-added service TV system facing 3G users, the central processing unit is used to execute the program source code of each module, and the internal memory is used to load the program source code of each module; Devices, network interfaces, and human interaction interfaces all communicate with the central processing and memory through the PCI bus.

In order to facilitate the public's understanding, the technical solution of the present invention will be described in detail below with a specific embodiment.

As shown in FIG. 1 , the value-added service time-shift TV system for 3G users of the present invention includes: an interactive management module 100 , a program database module 110 , a time-shift service module 120 , and a value-added service module 130 . Interaction management module 100 acts as an intermediary module, and loads the interactive proxy work between the user and the background video module; the program list data module 110 is responsible for the production and maintenance of time-shifted program lists and value-added video program lists; the time-shift service module 120 is used for production Shift video content, complete a series of operations such as time-shifted video collection, encoding, storage and update; value-added business service module 130 completes the production of value-added business video content, including discovery of value-added videos, secondary storage of popular videos, and update of value-added videos maintenance etc.

Fig. 2 is a schematic diagram of an implementation of the time-shift service module of the present invention, which mainly includes: a central processing unit 200, a memory 210, a bus 220, a video acquisition 230, a video encoding 240, a storage device 250, a network interface 260, and a human-computer interaction interface 270 ; wherein, the memory module loads main program processing modules as required, including: video capture program 211 , video encoding program 212 , video storage program 213 , and video update program 214 .

In the embodiment shown in Fig. 2, the making of time-shifted video content is specifically: start, memory 210 loads time-shifted video capture program 211, then CPU 200 executes time-shifted video capture program 211, starts video capture card 230 pair The live TV signal is collected in real time, and the original audio and video data collected is temporarily stored in the time-shifted video collection buffer in the memory through the bus 220, waiting for subsequent operations such as encoding and storage; after loading the collection program, the memory 210 is loaded immediately Video encoding program 212, the central processing unit 200 executes the video encoding program 212, starts the hardware encoding card, and encodes the original audio data PCM and video data YUV2 in the acquisition buffer, and the encoded audio and video data is cached in the internal memory through the bus 220 In the coding cache of the code, in order to prepare for subsequent storage processing; when loading the coding program several clock cycles, the memory 210 starts to load the video storage program 213, and the central processing unit 200 then executes the video storage program 213, and provides time-shifted programs according to the program list database module single information, the audio and video data in the encoding cache is stored in the corresponding storage device 250 according to a given index structure; for the time-shifted video content produced, real-time update operations are required, including: the latest time-shifted video content Add and delete aging time-shifted video content, load 214 video update program in memory, be responsible for adding new time-shifted video content to the specified hard disk directory according to the specified index structure, monitor the lifetime of each video and update the aging time-shifted video Content removed.

The storage device 250 is a large-capacity hard disk for storing long-term software module data, mainly electronic program guide files, time-shifted video content, value-added service video content, and various program module data files. The network interface 240 is an Ethernet card, which can be connected to a local area network through the network; through the network interface, the electronic program guide can be downloaded from the network and interact with users. The human-computer interaction interface 250 includes a mouse, a keyboard, a display, etc., through which the operator can interact with the software modules, so as to complete various operation tasks of the management server.

Fig. 3 is a schematic diagram of an implementation scheme of the value-added service module of the present invention, mainly comprising: a central processing unit 300, a memory 310, a bus 320, a storage device 330, a network interface 340, and a human-computer interaction interface 350; Load the main program processing modules: value-added video acquisition program 311 , value-added video storage program 312 , value-added program list production program 313 , and value-added video update program 314 .

In the embodiment shown in Fig. 3, the production of the value-added service video content is specifically as follows: at the beginning, the memory 310 loads the value-added video acquisition program 311, then the central processing unit 300 executes the value-added video acquisition program 311, according to the received interactive management module provides The user access statistics information, through self-study to filter out time-shifted video programs with a high access popularity coefficient; then, the memory 310 loads the value-added video storage program 312, and the central processing unit 300 executes the video encoding program 312, which will meet the value-added service requirements. The content is read into the hard disk storage device corresponding to the value-added service through the bus 320, and the production process of the value-added video content is completed; after the storage of the value-added video is completed, the memory 310 loads the value-added program list production program 313, and the central processing unit 300 executes the video storage program 313. Generate local value-added program list information according to the filtered time-shifted program information. The value-added program list information includes: program channel number, broadcast date and time, program name, survival time value, program access popularity coefficient value, and value-added update Information such as the counter and the creation time of the program; every time the statistical information submitted by the interactive management module is received, the self-learning update operation of the value-added video content and the value-added program list will be performed, and the aging value-added service video will be deleted.

Fig. 4 is a schematic diagram of an implementation scheme of the program database module of the present invention, which mainly includes: a central processing unit 400, a memory 410, a bus 420, a storage device 430, a network interface 440, and an interpersonal interaction interface 450; wherein, the memory module is loaded as required The main program processing modules include: time-shift program list program 411, value-added program list program 412, program list update program 413; program list database module maintains an up-to-date video program list database for the visit of interactive management module; program list database The module needs to be synchronized with the local program list of the value-added business service module in real time to ensure that the value-added program list in the program list data module is up-to-date.

In the embodiment shown in Fig. 4, the memory 410 is loaded with a time-shifted program list program 411, and then the central processing unit 400 executes the program list command, downloads the latest live TV program list from the Internet through the network interface 440, analyzes the program list, Extract information such as the program name, program play date and time, and program channel number in the program list, and store them in the designated storage directory of the program list database module in the form of xml; at the same time, the memory 410 loads the value-added service program list program 412, and then The central processing unit 400 executes the value-added program list instruction, and interacts with the local value-added program list of the value-added service module through the bus 420 in real time. After the local value-added program list of the value-added service module is updated, the value-added program list in the program database module also Carry out the corresponding refresh operation to ensure the real-time consistency of the two value-added program lists; for the existing program list, the memory 410 loads the program list update program 413, and the central processing unit 400 executes the program list update command to complete the time-shifted program list and the value-added program list. The update operation of the program list; for the update of the time-shifted program list, it is mainly to add new program information, and to delete the program information beyond the time-shift service cycle, and maintain an up-to-date time-shifted program list database; value-added program list The updating operation needs to interact synchronously with the local value-added program list of the value-added service module in real time, and update the content of the value-added service program list in the program list library based on the local value-added program unit of the value-added service module.

Fig. 5 is a schematic diagram of an implementation scheme of the interaction management module of the present invention, which mainly includes: a central processing unit 500, a memory 510, a bus 520, a storage device 530, a network interface 540, and an interpersonal interaction interface 550; wherein, the memory module loads the main The program processing module includes: foreground interactive program 511, background interactive program 512, and access statistics program 413; as an intermediary service module, the interactive management module is responsible for interacting with users on service requests, including receiving and responding to various request information from users; As a user agent module, the management module interacts with the background program list and video source module to obtain various service content requested by the user.

In the embodiment shown in Figure 5, the memory 510 loads the foreground interactive program 511, then the central processing unit 500 executes the program list instruction, and the interaction management module enters the working state, waiting for the request information from the user; if the user requests the program list information , the interaction management module analyzes the requested program list type, queries and reads the corresponding program list information from the program list database module through the bus 520, and feeds back the query result to the requesting user; if the user requests video content information, the interactive The management module parses the requested video type, queries the video address information from the corresponding video source module through the bus 520, reads the inquired video content into the cache of the interactive management module, and then sends the corresponding video content to the user; the memory 510 loads Backstage interactive program 512, then central processing unit 500 executes backstage interactive instruction, completes interactive management module to the background program list database module, the information reading operation of video source module; Load the access statistics program 513, then the central processing unit 500 executes the access statistics instruction, and through the total visits counter and the specific content counter, respectively count the total number of visits and the number of visits of the specific video content in the latest work cycle, and generate specific video content The value of the access heat coefficient value, and when the corresponding work cycle expires, submit the access statistical results greater than the system preset heat threshold to the value-added business service module.

Fig. 6 is a flow chart of signal processing of the video capture card in the embodiment. The video acquisition card adopted in this embodiment is the streaming media audio and video acquisition card of Seewin SVC404E, which supports four-way independent video and audio acquisition processing, supports the recording of streaming media formats MPEG-4, H.264, etc., supports 3GP, MP4 Such as file preservation and regular recording; in this example, the video capture card uses a composite (BNC) interface to input TV audio and video signals, after processing, it outputs uncompressed YUV2 video data and PCM audio data.

Fig. 7 is a working flowchart of the present invention. The complete working process is as follows: (1) The user first submits the time-shift program request information to the interaction management module through the intelligent terminal device; (2) After the interaction management module receives the user request letter, it analyzes the request information and determines the user requested information. information type, and send the program information query operation to the program database module; (3) after the interactive management module inquires the target program information, read the program information into the local cache of the interactive management module; (4) interact The management module analyzes and arranges the program list information in the local cache, reorganizes it into a specified communication data format, and feeds the program list information back to the user; (5) After the user obtains the requested time-shifted program list, , select the time-shifted video content that you are interested in, and then submit the user's time-shifted content request information to the interaction management module; (6) The interaction agent module receives the user's request signal, analyzes the request information, and determines the service requested by the user information type, and submit a time-shift content request command to the time-shift service module; (7) the interaction management module queries the storage directory of the time-shift service module, and after querying the target video content, continuously reads the video content to the interaction management module (8) The interactive management module continuously feeds back the video content in the local buffer to each user according to a certain stream format; (9) While providing time-shifted video content services to users, the interactive management module counts and records Under the user's access behavior, including the total number of visits of all users in a statistical period and the specific number of visits of each time-shifted video in the visit period, generate the visit popularity coefficient value of each time-shifted video, and filter out the visit popularity For the time-shifted video whose coefficient value is less than the heat threshold preset by the system, the statistical information meeting the conditions is submitted to the value-added business service module at the end of the period; (10) the value-added business service module receives the access statistics information of the interaction management module Finally, combined with the corresponding program list data, the access statistical information is analyzed, and the time-shifted video content with high access popularity coefficient is screened out, and the video content is read from the storage path of the time-shifted video to this value-added service video (11) After the value-added service video is screened out, the value-added service service module will generate a local value-added service program list corresponding to the value-added service video content, and after completing the production of all value-added service videos, the value-added service program The list is submitted to the program list database module to complete the final production of the value-added service program list; (12) at a certain moment, the user sends the value-added service program list request information to the interaction management module; (13) after the interaction management module receives the user request letter, Analyze the request information, determine the type of information requested by the user, and send a program list information query operation to the program list database module; (14) After the interaction management module has inquired about the target program list information, it reads the program list information into the interactive in the local buffer of the management module; (15) the interactive management module analyzes and organizes the program list information in the local buffer, reorganizes it into a prescribed communication data format, and feeds back the program list information to the user; (16) After the user obtains the requested value-added service program list, he selects the value-added service video content he is interested in according to his own preferences, and then submits the user's value-added service content request information to the interaction management module; (17) the proxy module receives the user's request information, analyze the request information, determine the type of service information requested by the user, and submit a time-shift content request command to the value-added service module; (18) after the interaction management module inquires about the target video content, continue Read into the local buffer of the interaction management module; (19) The interaction management module continuously feeds back the video content in the local buffer to each user according to a certain stream format.

Claims (5)

1. towards a value-added service time-shifted television system for 3G subscription, it is characterized in that, comprise time-shifted service module, value-added service service module, playbill data library module, interactive maintenance module; Described time-shifted service module is for making time shift audio, video data; Described value-added service service module is used for the making of value-added service audio-video frequency content data, excavates that pouplarity is high, valuable video content from time shift video flowing, carries out secondary storage; Described playbill data library module is used for generating, administering and maintaining time shift program single database and value-added service playbill data storehouse; Described interactive maintenance module in charge and user carry out direct interaction, receive, respond and add up the solicited message from user;

Described value-added service service module comprises local value-added service playbill data storehouse, value-added service service module adopts the method for self study to make value-added service audio-video frequency content data, specific as follows: value-added service service module first carries out self study after receiving the user's acess control analytical information from interactive maintenance module, to search in local value-added service playbill data storehouse whether containing the video content that the visit information provided with interactive maintenance module matches, the access temperature coefficient provided in i.e. interactive maintenance module is greater than the program of the threshold value preset, the access temperature coefficient of described program is the access times of this program and the ratio of total access times in one-period, if no, in local value-added service playbill data storehouse, just increase the project of this program, the time shift video data stream of this program is read in value-added service service module from time-shifted service module simultaneously, generate value-added service video content, if had, then upgrade the life span of this program in local value-added service playbill data storehouse, after have updated local value-added service playbill data storehouse, value-added service service module needs new value-added service programme to submit to playbill data library module, for refreshing the value-added service programme in playbill data storehouse.

2. as claimed in claim 1 towards the value-added service time-shifted television system of 3G subscription, it is characterized in that, in described value-added service playbill data storehouse, the lifetime value of program adopts ZiPf law to calculate acquisition: first, increment program is carried out descending according to its temperature coefficient value size; Next, use ZiPf law calculate each program in sorted lists certain moment following by next user the probable value of accessing; Then, be multiplied by this probable value with maximum lifetime, add two default basic life spans: the basic life span of time shift and the basic life span of increment, arrange the life span of an increment program.

3. as claimed in claim 2 towards the value-added service time-shifted television system of 3G subscription, it is characterized in that, described maximum lifetime is set to rise in value five times of basic life span.

4. as claimed in claim 1 towards the value-added service time-shifted television system of 3G subscription, it is characterized in that, the programme items in described local value-added service playbill data storehouse comprises program channel number, plays date and time, the creation-time of programming access temperature coefficient value, increment refresh counter, program lifetime value, program.

5. as claimed in claim 1 towards the value-added service time-shifted television system of 3G subscription, it is characterized in that, described time-shifted service module comprises collection submodule, encoding submodule, sub module stored and renewal submodule; Described collection submodule is responsible for the reception collection of broadcasting and TV direct broadcast television signals; The video/audio that described encoding submodule is used for collection submodule collects carries out coded treatment; Described sub module stored is used for the video/audio after by coding and is stored in the disk unit of specifying this locality, and sets up index structure, generates time shift video library; Described renewal submodule is for upgrading the time shift video content in time shift video library.