CN102857349B - System and method for personalized information customization based on RDS - Google Patents

Abstract

The invention discloses a system and a method for personalized information customization based on an RDS, and belongs to the technical field of wireless communication. A center server is used for crawling webpages according to themes and analyzing, extracting and saving character information on the webpages. A local server is used for text digest processing, and then performing segment and formatting processing according to standards of RDS. An RDS signal transmitter is used for modulating digital information and transmitting the information through a VHF-FM(frequency modulation) transmitter. A receiving terminal is used for demodulating and decoding and acquiring information collection preference of users according to browsing history of the users and then automatically regulating a receiving channel to receive corresponding information. By the system and the method, the users can automatically receive, download, process and store character information about a certain theme which is transmitted via the RDS while listening to radios; broadcast band needed to be listened to is regulated automatically by the system according to the acquired information collection preference of the users so that information which can draw attention of the users most possibly can be acquired and integrated automatically.

Description

The system and method that a kind of customized information based on RDS customizes

Technical field

The present invention relates to wireless communication technology field, particularly relate to the system and method for a kind of customized information based on RDS communication mode customization.

Background technology

It is wide that the Internet has spread scope as the communication means that a kind of interactivity is very strong, and real-time is high, the feature contained much information.But along with the explosive growth of amount of information, people often " are flooded " in the ocean of information.How to solve " information overload " and " information is isotropic " and become the difficult problem of pendulum in face of people.Personalized information service makes user can get oneself interested information in time, exactly from the Internet.Traditional Internet era, Website server resides in user this locality cookie information (the accessed number of times of certain web site, access time and enter the information such as path of website) by obtaining analyzes the individual demand of user, to provide pointed information service.After entering web 2.0 epoch, the customized information cluster tool being representative with technology such as Atom, RSS make user from passively, blindly receive information become on one's own initiative, selectively receive information become possibility.

Compared with the Internet, other communication media, as newspaper, TV, broadcast etc. have respective propagation advantage and limitation.And RDS (Radio Data System, digit broadcasting system) is widely used in broadcast world as a kind of novel Information Communication means.It is a kind of technology utilizing subcarrier that station name, program category, programme content and out of Memory are sent in digital form in FM broadcasting transmits.Just can identify these digital signals by the tuner with RDS function, become Charactes Display on a display screen.The broadcast receiver that user only needs one to have a RDS function just can Real-time Obtaining to abundant in content digital information.At present, this technology is mainly used in transport information navigation field.Consider that RDS technology has the propagation characteristic of broadcast and conventional internet concurrently, by broadcast the channel information come on transport of internet will be a kind of feasible scheme, not only construction cost is low for it, wide coverage but also less demanding to terminal, does not also require that user has certain professional skill.This will be one acquisition of information approach easily for the low-income groups in vast rural area and city.

With utilize the Internet the same to diffuse information, adopt RDS transmit the problem that information faces information overload equally.Therefore, the information service environment how for building a kind of personalization based on the information propagation pattern of RDS becomes the problem needing to solve.Compared to traditional the Internet, mode based on RDS is faced with more challenge: first, RDS depends on FM (Frequency Modulation) FM broadcasting, it is in fact the point-to-multipoint unidirectional information disclosure model of a kind of list, owing to being unidirectional communication, user cannot send request to server in real time, and therefore server cannot know the individual demand of user according to the browsing mode of user.Secondly, the rate of information throughput of RDS is very low, only has 1187.5bps, and the information transmitting magnanimity with so low speed is impossible.Just because of this, be more necessary with the limited bandwidth resources of RDS with a definite target in view for user provides the information service of " customized ".

Summary of the invention

The object of this invention is to provide a kind of customized information custom-built system based on mobile terminal RDS communication mode and method.Real-time Word message can not only be obtained when broadcast listening based on user of the present invention, simultaneously, history according to user uses record, and the acquisition of information preference that native system can also excavate user (such as, is more ready to obtain the information in which in certain period; Or which the more interested content of user is), automatic reception also stores the interested information of user's possibility.

Technical scheme provided by the invention is as follows:

The system that a kind of customized information based on RDS customizes, it is characterized in that, described system comprises following assembly (ginseng Fig. 1): central server 101, multiple stage home server 102, multiple RDS signal reflector 103, a multiple receiving terminal 104; Wherein:

-central server 101, is deployed in SP (Service Provider, service provider) place, is responsible for from the Internet, carrying out webpage according to theme crawling, and resolves, extracts and store the Word message of Web page;

-home server 102, is deployed in each professional FM broadcasting station place, is responsible for receiving the information about a certain class determination theme of being polymerized issued from central server 101, carries out text snippet process to it; Then, according to the standard of RDS, segmentation and format process are carried out to the result of text snippet; Then the data after segmentation and format are sent to RDS signal reflector 103;

-RDS signal reflector 103, be the set of device being deployed in each professional FM broadcasting station, the digital information received is carried out RDS modulation by it, then carries out FM modulation with needing the voice signal of broadcasting, form FM FM signal, launch finally by VHF-FM transmitter;

-receiving terminal 104, it is the handheld device of user, be responsible for that FM demodulation is carried out to the FM FM signal received, RDS solution is in harmonious proportion RDS decoding, and decoded information is presented to user, simultaneously according to the acquisition of information preference of the information browse record digging user of user, section automatically adjusts receiving channels according to the user profile preference excavated and receives corresponding information at one's leisure.

The workflow following (ginseng Fig. 2) of described system:

A) page that first central server carries out subject-oriented crawls, and carries out page parsing simultaneously, extracts word content;

B) central server by the data that extract through page parsing stored in database;

C) data relevant to certain theme are sent to the home server being deployed in certain the professional FM broadcasting station place be correlated with this theme by central server;

D) home server being deployed in professional FM broadcasting station place carries out text snippet process to the information received;

E) result after text snippet process is stored into the database of home server;

F) home server reads out data to be sent from database, and the maximum payload that it can carry according to RDS Frame is carried out to segmentation and encapsulates according to standard data format;

G) packaged data are sent to RDS signal reflector by home server;

H) RDS coding and RDS modulation is carried out after RDS signal transmitter receipt to data to be sent;

I) RDS signal reflector carries out FM modulation together with the signal of voice signal after modulating through RDS, obtains stereo fm signal;

J) the FM FM signal obtained is sent by VHF-FM transmitter by RDS signal reflector;

K) receiving terminal receives the FM FM signal of RDS signal transmitter transmission by VHF-FM receiver;

L) first receiving terminal carries out FM demodulation, isolates voice signal and RDS digital signal;

M) receiving terminal carries out RDS demodulation and RDS decoding to RDS digital signal, recovers Word message;

N) receiving terminal buffer memory Word message, user divides theme to browse relevant information by man-machine interface;

O) the information browse history of receiving terminal recording user, and according to the information preference of historical record digging user;

P) receiving terminal sorts to the program that will broadcast according to the user profile preference excavated, select the program channel alternatively channel of the most identical user profile preference, be switched to this CPCH reception when there is no manual intervention when program broadcasts and store corresponding Word message and browse with standby user.

Described receiving terminal 104 comprises following equipment: VHF-FM receiver, stereo demodulation circuit, RDS baseband signal recovery circuit, subcarrier regenerator, RDS decoder, bit timing pick-up circuit, loud speaker or earphone, data processor, memory and display.

Described central server 101 is connected by the Internet with between home server 102; Transfer of data is carried out by local area network (LAN) or USB interface between home server 102 and RDS signal reflector 103.

Described central server 101 is a computer, and disposing above has following functional module:

-initial seed module: for generating the good seed website towards particular topic, making to crawl module can carry out the work of crawling smoothly; Crawl module first to start with from initial seed URL and extract the URL that crawls as next step of new URL, added queue to be collected;

-URL administration module: allot pending URL to crawling module; Described URL mainly comes from: initial seed URL gathers; The new URL set extracted from the page extracted; The Meta information of the page extracted from Web page, theme and summary info;

-crawl module: obtain the Web page that URL points to;

-Controlling UEP module: the degree of correlation calculating the Web page that crawls of institute and its link and current topic, the Web page only having degree of subject relativity higher just has the necessity crawled;

-order module: the degree of correlation according to Web page and theme sorts to URL, adds queue to be collected by the URL corresponding to Web page higher for degree of subject relativity;

-page parsing module: the file structure of the Web page crawled is resolved, the information corresponding to each label field of extracting is stored in database;

-data transmission blocks: be responsible for connecting with the home server being deployed in each professional broadcast radio station, by store in a database divided the information of class to be sent to home server by theme.

Described home server 102 is computer, disposes following functional module above:

-data reception module: be responsible for establishing a communications link with central server, receives the Word message that the theme that issues from central server is relevant;

-text snippet module: the transmission rate due to RDS compares other transmission meanss (as Wifi, GPRS) all much lower (1.1875kbps), not too be suitable for transmitting the information of big data quantity, therefore in the data volume not reducing transmission while drop-out entropy as far as possible; The responsibility of text snippet module utilizes existing text snippet algorithm to carry out summary process to the Word message about certain theme received, and extracts brief and concise summary info;

-data sectional and standardized module: because the payload user data that can hold in each Frame of RDS is limited, therefore, if data volume to be sent is larger, utilizes this module to carry out segment processing to it, transmit with multiple Frame; After segmentation completes, respectively according to the data format of RDS, standardization is carried out to each segmentation;

-data transmission blocks: this module in charge and RDS reflector connect, and the data through segmentation and standardization are sent to RDS reflector, for RDS modulation and FM modulation.

Described user terminal 104 deploy has following functional module:

-channel manage module, comprises three major functions: 1) program list function, the program list information that this module receiving center server issues, and user optionally receives oneself interested programme content according to list information; 2) program selection function, is converted to corresponding frequency range by the selection of user to program, sends to RDS receiver with the form of parameter; 3) program booking function, according to the analysis result to user behavior, the interested program of subscribing user possibility, and the frequency range corresponding to the program needing to subscribe is sent to time triggered module with parametric form;

-user behavior excavates module, the historical record of program channel is selected to analyze the potential information preference of user according to user, and the programme information in the rendition list provided in binding channel administration module generates the rendition list of each free time section needs reception automatically, and this program list information subscribed is sent to channel manage module; User's historical behavior record saves the program preference information of user in a time period, is stored in the form of a file in receiving terminal;

-time triggered module, receives the reservation programme information sent by channel manage module, triggers RDS receiver receive corresponding programme content according to each timetable subscribing program; RDS receiver isolates stereo audio and Word message after receiving FM broadcast singal after the process of the step such as demodulation, decoding, and wherein Word message is sent to data processor and processes;

-data processor, after making ground literal coded treatment, is sent to memory and stores or be directly inputted to user interface the original character information exported by RDS receiver.

Invention also provides a kind of method that customized information based on RDS customizes, it is characterized in that, utilize system provided by the invention, concrete steps following (ginseng Fig. 3):

1) the initial seed CMOS macro cell of central server is towards the URL seed website of particular topic, crawls module and first starts with from initial seed URL and extract the URL that new URL crawls as next step, added queue to be collected;

2) central server crawls module and carries out the page according to URL and crawl, and extracts new URL and added queue to be collected;

3) central server Controlling UEP module calculates the degree of correlation of each Web page and the theme crawled; URL corresponding to the page forward for sequence according to sorting from high to low according to the degree of correlation of each page and theme, is added emitter pending and gathers queue by order module;

4) central server URL administration module reads URL and distributes to and crawl module from queue to be collected;

5) central server page parsing module reads the result of degree of subject relativity sequence, and the Web page higher to degree of subject relativity is resolved, and extracts information corresponding to each label field of Web page and stored in database;

6) data transmission blocks of central server will divide the information of class to send to home server by theme in database;

7) data reception module of home server receives the Word message that central server sends;

8) the text snippet module of home server carries out text snippet process generation summary info to the Word message received, and stored in database;

9) data sectional of home server and standardized module read out data to be sent from database, if data are excessive, exceed the maximum payload that can carry of RDS Frame, then according to RDS reference format, segment processing is carried out to data to be sent, and encapsulate with the data format of standard;

10) data to be sent through segmentation and standardization are sent to RDS signal reflector by the data transmission blocks in home server;

11) after RDS signal transmitter receipt to the data sent from home server, RDS coding, RDS modulation are carried out to it, carry out FM modulation together with voice signal to be sent simultaneously, generate FM modulation signal, then sent by VHF-FM transmitter;

12) receiving terminal starts FM broadcast receiving function;

13) user is at receiving terminal choosing a topic, initiates the request of acquisition of information;

14) if there is corresponding information under this theme, corresponding theme checks that counter adds 1, and from buffer memory, reads out corresponding information and output on display device; If there is not corresponding information under this theme, corresponding theme request is that empty counter adds 1;

15) judge whether to need ending message to browse, if user does not wish that ending message is browsed, jump to the 13rd) step, otherwise enter next step;

16) check that number of times and corresponding theme request are the value write user historical record of sky number of times by recording corresponding theme;

17) calculate user to the Long-term Interest degree of each theme according to historical record, so-called Long-term Interest degree refers to user for a long time to the interest-degree of the information of certain theme, and its value is comparatively stable;

18) calculate user to the short-term interest degree of each theme according to historical record, so-called short-term interest degree refers to user's interest-degree to each theme within the time cycle that certain is shorter, and what it reflected is only the preference of user within certain specific time period;

19) comprehensive Long-term Interest degree and short-term interest degree calculate user at the interest-degree of current time to each theme, and sort according to interest-degree height;

20) read in the rendition list of each channel, and select in conjunction with interest-degree ranking results and most possible broadcast program corresponding to the interested information of user as scheduled program;

21) read out the broadcast start/stop time of scheduled program from the rendition list, according to this of trigger start-up time in moment;

22) the continuous poll of Trigger of time checks that whether arriving program broadcasts the moment, if arrived the broadcast moment of scheduled program, jumps to the 23rd) step, otherwise jump to the 24th) step;

23) the current program whether receiving other channels of user is judged, if not, then jump to the 24th) step, if user is receiving the program of other channels really, then jump to the 25th) step;

24) FM demodulation, RDS demodulation and RDS decoding are carried out to the FM FM signal received;

25) buffer memory is carried out to through the decoded Word message of RDS;

26) if user is receiving the program of other channels, then point out user the need of the channel being switched to scheduled program; If user selects no, then jump to the 24th) step, otherwise jump to the 27th) step;

27) be switched to the channel corresponding to scheduled program, and jump to the 24th) step;

After above step, receiving terminal can excavate the potential information preference of user while user's browsing information, select scheduled program in conjunction with the rendition list simultaneously, after arriving the scheduled program broadcast moment, download the RDS Word message that also buffer memory transmits with scheduled program browse for user.

Preferably, step 17) described in the computational methods of Long-term Interest degree be

$\mathrm{long}\left(i\right)=\mathrm{sum}\left(i\right)/\underset{i}{\mathrm{\Σ}}\mathrm{sum}\left(i\right),$

Wherein, sum (i) represents that information accumulative of user to the i-th class theme checks number of times, represent that user checks number of times to the accumulative of the information of all themes;

Step 18) described in the computing formula of short-term interest degree be:

$\mathrm{short}\left(i\right)=\frac{\mathrm{sum}\left(i\right)-\mathrm{last}\left(i\right)}{\underset{i}{\mathrm{\Σ}}(\mathrm{sum}\left(i\right)-\mathrm{last}\left(i\right))}+(1-\exp (-\mathrm{unresponse}\left(i\right)))$

Wherein, represent that user checks to the newly-increased of the information of certain theme the newly-increased ratio checking number of times that number of times accounts for the information to all different themes in nearest measurement period, 1-exp (-unresponse (i)) expression asks the information of certain class theme continuously by user and without responding the user of this situation reflection to the interest-degree of certain class theme, wherein unresponse (i) represents user to the delivering request of the i-th class theme without the number of times responded.

Preferably, step 19) described in the computing formula of interest-degree be

$\left\{\begin{array}{c}\mathrm{Interest}\left(i\right)=\mathrm{\α}\×\mathrm{long}\left(i\right)+\mathrm{\β}\×\mathrm{short}\left(i\right)\\ \mathrm{\α}+\mathrm{\β}=1\end{array}\right.$

Interest (i) represents the interest-degree of user to the information of the i-th class theme, it is obtained by Long-term Interest degree long (i) and short-term interest degree short (i) weighted sum, and wherein α and β represents that Long-term Interest degree and short-term interest degree are to the contribution factor of user interest degree respectively.

Beneficial effect of the present invention: utilize technical scheme provided by the invention, user can the Word message about certain theme that transmitted by RDS of automatic reception while broadcast listening, download, process and storage, and simultaneity factor can automatically adjust the broadcast band that needs to monitor with the most possible interested information of automatic acquisition user according to the information preference of the user excavated and be integrated.

Accompanying drawing explanation

Fig. 1 is the system deployment diagram of system of the present invention.Wherein server centered by 101,102 is home server, and 103 is RDS signal reflector, and 104 is receiving terminal.

Fig. 2 is the working-flow figure of system of the present invention.

Fig. 3 is the flow chart of the customized information method for customizing based on RDS of the present invention.

Fig. 4 is the system architecture diagram in the embodiment of the present invention.

Fig. 5 is the software architecture figure in the embodiment of the present invention on central server.

Fig. 6 is the software architecture figure in the embodiment of the present invention on home server.

Fig. 7 is the software architecture figure in the embodiment of the present invention on receiving terminal.

Fig. 8 is the RDS Word message that in the embodiment of the present invention, receiving terminal has divided class by subject categories.

Fig. 9 is the program list information that embodiment of the present invention mid band administration module is safeguarded.

Table 1 have recorded the historical behavior that user involved in the embodiment of the present invention checks all kinds of information.

Embodiment

Embodiment of the present invention comprises following hardware device (annexation between each equipment is as shown in Figure 4):

1. central server.Central server is one to be responsible for from the Internet, carrying out webpage by theme crawling, and extracts the computer of word content.It is made up of I/O equipment such as CPU (central processing unit), internal memory, memory, network interface card and display, mouse, keyboards.Central server is deployed in SP (Service Provider, service provider) place.

2. home server.Home server is deployed in professional FM broadcasting station place.It is responsible for receiving the information of having divided class according to theme issued from central server, carries out text snippet process to it.According to RDS standard, segmentation and format process are carried out to summary texts simultaneously.The hardware composition of this local server is identical with central server.

3.RDS signal projector.RDS signal reflector is the broadcast signal transmission system being deployed in inside, each professional FM broadcasting station.The word sent from home server received is carried out RDS modulation by it, then carries out FM modulation together with the sound programme in broadcasting station, forms modulation signal, sends finally by VHF/FM transmitter.RDS signal reflector reflector comprises the equipment such as stereophonic encoder, differential encoder, diphase code generator, suppressed carrier modulator, signal multiplexer and VHF/FM transmitter.

4. receiving terminal.Receiving terminal is the handheld device of user, in order to receiving broadcast signal, and demodulates the voice signal and Word message that comprise in broadcast singal.Receiving terminal is made up of equipment such as VHF/FM receiver, stereo demodulation circuit, RDS baseband signal recovery circuit, subcarrier regenerator, RDS decoder, bit timing pick-up circuit, loud speaker/earphone, data processor, memory and displays.Receiving terminal receives the wireless signal launched in radio station by VHF/FM receiver after, will wherein deliver to stereo demodulator and carry out FM demodulation by a road signal, the audio signal that demodulation obtains be play by loud speaker or earphone.Two paths of signals recovers RDS baseband signal and subcarrier respectively by band pass filter in addition.RDS baseband signal carries out bit timing pick-up by multiplier on the one hand together with subcarrier signal, RDS signal is input in RDS decoder on the other hand, RDS decoder utilizes bit timing pick-up signal to decode 0/1 digital information from RDS baseband signal, after digital processing unit, recover original text message.

Be connected by the Internet between central server with home server, between the RDS reflector in home server and broadcasting station, carry out transfer of data by local area network (or USB interface).

The embodiment arrived involved in the present invention by three sub-System's composition, operates on central server, home server and receiving terminal particularly respectively.Fig. 5, Fig. 6, Fig. 7 sets forth the system framework figure of these three subsystems.

The major function of central server is the Web page on point focused crawl the Internet, and resolves Web page, extracts corresponding word content.Its software architecture as shown in Figure 5, contains altogether: initial seed module, URL administration module, crawl module, Controlling UEP module, order module, page parsing module and data transmission blocks.Cooperation relation between modules is described below:

● initial seed module: for generating the good seed website towards particular topic, making to crawl module can carry out the work of crawling smoothly.Crawl module first to start with from initial seed URL and extract the URL that crawls as next step of new URL, added collection queue.

● URL administration module: treat the URL crawled and sort, and allot pending URL to crawling module.These URL mainly come from: 1) initial seed URL gathers; 2) the new URL set extracted from the page extracted; 3) the Meta information of the page extracted from Web page, theme and summary info.

● crawl module: obtain the Web page that URL points to;

● Controlling UEP module: the degree of correlation calculating the Web page that crawls of institute and its link and current topic, the Web page only having degree of subject relativity higher just has the necessity crawled;

● order module: the degree of correlation according to Web page and theme sorts to URL, adds the URL corresponding to Web page higher for degree of subject relativity and preferentially crawls queue.

● page parsing module: resolve the file structure of the Web page crawled, the information corresponding to each label field of extracting is stored in database.

● data transmission blocks: be responsible for connecting with the home server being deployed in each professional broadcast radio station, by store in a database divided the information of class to be sent to opposite end by theme.

The major function of home server carries out text snippet process to the information sended over from central server received, and the summary texts generated carried out to segmentation and carried out standardization according to the data format of RDS simultaneously.Its software architecture as shown in Figure 6, contains altogether data reception module, text snippet module, data sectional and standardized module and data transmission blocks.The major function of modules is described below:

● data reception module: be responsible for establishing a communications link with central server, receives the Word message that the theme that issues from central server is relevant;

● text snippet module: the transmission rate due to RDS compares other transmission meanss (as Wifi, GPRS) all much lower (1.1875kbps), is not too suitable for the information transmitting big data quantity.Therefore in the data volume as far as possible not reducing transmission while drop-out entropy.The responsibility of text snippet module utilizes existing text snippet algorithm to carry out summary process to the Word message about certain theme received, and extracts brief and concise summary info;

● data sectional and standardized module: because the payload user data that can hold in each Frame of RDS is limited.Therefore, if data volume to be sent is larger, needs to carry out segment processing to it, transmit with multiple Frame.After segmentation completes, respectively according to the data format of RDS, standardization is carried out to each segmentation.

● data transmission blocks: this module in charge and RDS reflector connect, and the data through segmentation and standardization are sent to RDS reflector, for RDS modulation and FM modulation.

The software systems that receiving terminal runs as shown in Figure 7, contain following main modular altogether: user behavior excavates module, time triggered module, channel manage module and user's historical behavior record, user interface, memory, data processor and RDS receiver.

● channel manage module comprises three major functions: 1) program list function.The program list information that this module receiving center server issues, user optionally receives oneself interested programme content according to list information; 2) program selection function.The selection of user to program is converted to corresponding frequency range, sends to RDS receiver with the form of parameter; 3) program booking function.According to the analysis result to user behavior, the interested program of subscribing user possibility, and the frequency range corresponding to the program needing to subscribe is sent to time triggered module with parametric form.

● user behavior excavates module and selects the historical record of program channel to analyze the potential information preference of user according to user, and the programme information in the rendition list provided in binding channel administration module generates the rendition list of each free time section needs reception automatically, and this program list information subscribed is sent to channel manage module.User's historical behavior record saves the program preference information of user in a time period, is stored in the form of a file in receiving terminal.

● time triggered module receives the reservation programme information sent by channel manage module, triggers RDS receiver receive corresponding programme content according to each timetable subscribing program.RDS receiver isolates stereo audio and Word message after receiving FM broadcast singal after the process of the step such as demodulation, decoding, and wherein Word message is sent to data processor and processes.

● after data processor makes ground literal coded treatment to the original character information exported by RDS receiver, be sent to memory and store or be directly inputted to user interface.

The specific works flow process of the system that the embodiment of the present invention comprises, is described below:

First, on central server, system determines the theme of the information needing to crawl.Then crawling of subject-oriented is carried out, the Web page crawled is resolved, the Word message extracted is stored in database, after this information in database to be sent to the home server being deployed in the FM broadcasting station relevant to this theme according to theme.

First home server carries out text snippet process to it and stored in database, after carrying out segmentation and standardized packages to summary texts, is sent to RDS signal reflector by data transmission blocks after receiving the information that central server issues.

After RDS signal transmitter receipt to the data needing to send, first RDS modulation is carried out to it, then the signal after modulation and voice signal are carried out stereo FM modulation, finally by VHF/FM transmitter, this signal is sent.

At receiving terminal, the FM FM signal that the FM frequency range that VHF/FM receiver receives monitoring sends, obtains the Word message comprised in RDS signal after FM demodulation, RDS demodulation and decoding process.First receiving terminal extracts program list information, if user needs switching channels to receive its other programs interested, adjusts to corresponding UHF band reception FM broadcast singal, if user does not need to switch frequency range, receives the signal that current frequency range is broadcasted.Carry out FM demodulation, RDS demodulation, RDS decoding to the FM signal received, the Word message that buffer memory obtains is until the broadcast program listened to terminates.While broadcast listening program and buffer memory RDS Word message, user can browse and be cached to local classified information.System can recording user browse record, end browsing information in generate corresponding journal file.Then, system reads newly-generated journal file, according to the interest preference that the browsing histories digging user of user is potential, according to the interest preference of user and the rendition list of subsequent period, system can sort to next period program, selects the program of the interested Word message of most possible broadcast user as scheduled program.System, according to trigger start-up time beginning and ending time of scheduled program, will be switched to channel corresponding to program the moment prompting user arriving program broadcasting time, otherwise wait for.

See Fig. 8, for involved in the present invention to embodiment in the Word message according to the classifying downloaded storage of program category.As shown in Figure 8, be divided in the embodiment of the present invention: the subject matter that economy, current events, life, health, education, physical culture etc. are dissimilar.The RDS Word message of downloaded stored under such theme is contained below every class subject matter.If not about the information of certain class theme, then the download items under such theme is empty.

In the process of carrying out user personalized information customization, take the concrete technical scheme of method to be described below:

After system starts, first user clicks certain theme on interface as shown in Figure 8, if be cached with relevant information under this theme, then from buffer memory, reads in relevant information display on the display device, simultaneously corresponding theme check that number of times adds 1; If current time does not have relevant information and is buffered under this theme, then corresponding theme request is that empty number of times adds 1.After user terminates this information browse, system is by this information browse record write user history file of user.Then the system content read in history file starts the information preference of digging user.When calculating the interest-degree of user for certain class theme, the present invention has considered the factor of two aspects: the Long-term Interest feature of user and short-term interest feature.The Long-term Interest feature of user is the habitual behavior that a people is formed for a long time, and be presented as that user dotes on degree to the intrinsic of the information of certain class subject matter in the present invention, this interest value is relatively stable, and the impact by the factor such as time, environment is less.The short-term interest feature of user then embodies user's fancy grade for certain class theme within certain specific time period, it is larger by the impact of time, environment etc., therefore relative Long-term Interest feature, the short-term interest feature instantiation hobby of user within some periods, has certain sporadic and discontinuity.

$\left\{\begin{array}{c}\mathrm{Interest}\left(i\right)=\mathrm{\α}\×\mathrm{long}\left(i\right)+\mathrm{\β}\×\mathrm{short}\left(i\right)\\ \mathrm{\α}+\mathrm{\β}=1\end{array}\right.---\left(1\right)$

In formula (1), Interest (i) represents the interest-degree of user to the information of the i-th class theme, it is obtained by Long-term Interest degree long (i) and short-term interest degree short (i) weighted sum, and wherein α and β represents that Long-term Interest degree and short-term interest degree are to the contribution factor of user interest degree respectively.

The Long-term Interest degree of user to certain class theme i can be embodied the attention rate of the information of certain class theme for a long time by user, in the present invention, have recorded user inside user's historical behavior record and number of times is checked to the information of all kinds of theme, the check rate of user to the information of all kinds of theme then embodies the relative degree of concern of user to the information of these themes, therefore in the present invention, the Long-term Interest degree of user can be provided by following formula:

$\mathrm{long}\left(i\right)=\mathrm{sum}\left(i\right)/\underset{i}{\mathrm{\Σ}}\mathrm{sum}\left(i\right)---\left(2\right)$

Wherein, sum (i) represents that information accumulative of user to the i-th class theme checks number of times, represent that user checks number of times to the accumulative of the information of all themes.Its business then reflects the degree of concern of user's the i-th class theme for a long time, that is to say Long-term Interest degree.

The short-term interest degree of user can be reflected by the user behavior of user within certain time period.Such as, if user is interested in the information of certain class theme within certain time period, then will inevitably have such theme within this specific time period and higher check rate, and this checks that the value of rate is not that its can have obvious fluctuation and fluctuating within some time period stably within longer time cycle.In addition, user can also be that empty number of times reflects from request to the short-term interest degree of certain class theme.If user repeatedly asks the information of checking certain class theme, but all returns sky, illustrate that user has comparatively urgent need to such other information, reveal the short-term interest degree of user to this theme from a side surface body higher.Therefore, the short-term interest degree of user to certain class theme can be expressed as:

$\mathrm{short}\left(i\right)=\frac{\mathrm{sum}\left(i\right)-\mathrm{last}\left(i\right)}{\underset{i}{\mathrm{\Σ}}(\mathrm{sum}\left(i\right)-\mathrm{last}\left(i\right))}+(1-\exp (-\mathrm{unresponse}\left(i\right)))---\left(3\right)$

Above formula has two parts to form, and front portion (namely ) represent that user checks to the newly-increased of the information of certain theme the newly-increased ratio checking number of times that number of times accounts for the information to all different themes in nearest measurement period.Rear portion (i.e. 1-exp (-unresponse (i))) expression asks the information of certain class theme continuously by user and without responding the user of this situation reflection to the interest-degree of certain class theme, wherein unresponse (i) represents user to the delivering request of the i-th class theme without the number of times responded.

In table 1 embodiment, user checks the historical behavior of the information of all kinds of theme

As shown in Figure 9, be the rendition list involved in embodiment in the present invention.This rendition list is regularly downloaded from central server by channel manage module.This program menu contains the programm name and corresponding subject classification that each channel broadcasts in different time sections, and the program broadcasted within 8:00 to the 9:00 time period as economic channel is " financial and economic news ", and the subject matter belonging to it is " economy ".According to the potential interest domain of the program broadcasting time of each channel and the classification of each program and user, system can be made needs the programme content received automatically to recommend user in different time sections.After obtaining the interest-degree of user about each theme, the theme that user is most interested in can be excavated according to carrying out from high in the end sorting, in conjunction with the rendition list of each channel, scheduled program can be selected according to user to the theme corresponding to the interest-degree of each theme and each channel broadcast program.According to scheduled program start play trigger start-up time in moment, when arrive program broadcast the moment time prompting user the need of automatically switching to corresponding channel, if user agree to; be switched to corresponding channel, receive and buffer memory RDS Word message; If the current channel being in scheduled program place of user, then continue to receive and buffer memory RDS Word message.

Namely complete after above step and the information preference of user is excavated and customized information customization.

Claims (10)

1. the system of the customization of the customized information based on digit broadcasting system RDS, it is characterized in that, described system comprises following assembly: central server (101), multiple stage home server (102), multiple digit broadcasting system RDS signal reflector (103), multiple receiving terminal (104); Wherein:

-central server (101), is deployed in service provider SP place, is responsible for from the Internet, carrying out webpage according to theme crawling, and resolves, extracts and store the Word message of Web page;

-home server (102), is deployed in each professional FM broadcasting station place, is responsible for receiving the information about a certain class determination theme of being polymerized issued from central server (101), carries out text snippet process to it; Then, according to the standard of digit broadcasting system RDS, segmentation and format process are carried out to the result of text snippet; Then the data after segmentation and format are sent to digit broadcasting system RDS signal reflector (103);

-digit broadcasting system RDS signal reflector (103), it is the set of device being deployed in each professional FM broadcasting station, the digital information received is carried out digit broadcasting system RDS modulation by it, then FM modulation is carried out with needing the voice signal of broadcasting, form FM FM signal, launch finally by VHF-FM transmitter;

-receiving terminal (104), it is the handheld device of user, be responsible for that FM demodulation is carried out to the FM FM signal received, digit broadcasting system RDS solution is in harmonious proportion digit broadcasting system RDS decoding, and decoded information is presented to user, simultaneously according to the acquisition of information preference of the information browse record digging user of user, section automatically adjusts receiving channels according to the user profile preference excavated and receives corresponding information at one's leisure.

2. the system as claimed in claim 1, is characterized in that, the workflow of described system is as follows:

A) page that first central server carries out subject-oriented crawls, and carries out page parsing simultaneously, extracts word content;

B) central server by the data that extract through page parsing stored in database;

C) data relevant to certain theme are sent to the home server being deployed in certain the professional FM broadcasting station place be correlated with this theme by central server;

D) home server being deployed in professional FM broadcasting station place carries out text snippet process to the information received;

E) result after text snippet process is stored into the database of home server;

F) home server reads out data to be sent from database, and the maximum payload that it can carry according to digit broadcasting system RDS Frame is carried out to segmentation and encapsulates according to standard data format;

G) packaged data are sent to digit broadcasting system RDS signal reflector by home server;

H) digit broadcasting system RDS signal transmitter receipt is modulated to data to be sent laggard row digit broadcasting system RDS coding and digit broadcasting system RDS;

I) digit broadcasting system RDS signal reflector carries out FM modulation together with the signal of voice signal after modulating through digit broadcasting system RDS, obtains stereo fm signal;

J) the FM FM signal obtained is sent by VHF-FM transmitter by digit broadcasting system RDS signal reflector;

K) receiving terminal receives the FM FM signal of digit broadcasting system RDS signal transmitter transmission by VHF-FM receiver;

L) first receiving terminal carries out FM demodulation, isolates voice signal and digit broadcasting system RDS digital signal;

M) receiving terminal carries out digit broadcasting system RDS demodulation to digit broadcasting system RDS digital signal and digit broadcasting system RDS decodes, and recovers Word message;

N) receiving terminal buffer memory Word message, user divides theme to browse relevant information by man-machine interface;

O) the information browse history of receiving terminal recording user, and according to the information preference of historical record digging user;

P) receiving terminal sorts to the program that will broadcast according to the user profile preference excavated, select the program channel alternatively channel of the most identical user profile preference, be switched to this CPCH reception when there is no manual intervention when program broadcasts and store corresponding Word message and browse with standby user.

3. the system as claimed in claim 1, it is characterized in that, described receiving terminal (104) comprises following equipment: VHF-FM receiver, stereo demodulation circuit, digit broadcasting system RDS baseband signal recovery circuit, subcarrier regenerator, digit broadcasting system RDS decoder, bit timing pick-up circuit, loud speaker or earphone, data processor, memory and display.

4. the system as claimed in claim 1, is characterized in that, is connected between described central server (101) with home server (102) by the Internet; Transfer of data is carried out by local area network (LAN) or USB interface between home server (102) and digit broadcasting system RDS signal reflector (103).

5. the system as claimed in claim 1, is characterized in that, described central server (101) is computer, and disposing above has following functional module:

-initial seed module: for generating the seed website towards particular topic, making to crawl module can carry out the work of crawling smoothly; Crawl module first to start with from initial seed URL and extract the URL that crawls as next step of new URL, added collection queue;

-URL administration module: allot pending URL to crawling module; Described URL mainly comes from: initial seed URL gathers; The new URL set extracted from the page extracted; The Meta information of the page extracted from Web page, theme and summary info;

-crawl module: obtain the Web page that URL points to;

-Controlling UEP module: the degree of correlation calculating the Web page that crawls of institute and its link and current topic, the Web page only having degree of subject relativity high just has the necessity crawled;

-order module: the degree of correlation according to Web page and theme sorts to URL, adds the URL corresponding to Web page high for degree of subject relativity and preferentially crawls queue;

-page parsing module: the file structure of the Web page crawled is resolved, the information corresponding to each label field of extracting is stored in database;

-data transmission blocks: be responsible for connecting with the home server being deployed in each professional broadcast radio station, by store in a database divided the information of class to be sent to home server by theme.

6. the system as claimed in claim 1, is characterized in that, described home server (102) is computer, and disposing above has following functional module:

-data reception module: be responsible for establishing a communications link with central server, receives the Word message that the theme that issues from central server is relevant;

-text snippet module: utilize existing text snippet algorithm to carry out summary process to the Word message about certain theme received, extract brief and concise summary info;

-data sectional and standardized module: if data volume to be sent greatly, utilize this module to carry out segment processing to it, transmit with multiple Frame; After segmentation completes, respectively according to the data format of digit broadcasting system RDS, standardization is carried out to each segmentation;

-data transmission blocks: this module in charge and digit broadcasting system RDS reflector connect, and the data through segmentation and standardization are sent to digit broadcasting system RDS transmitter, modulates for digit broadcasting system RDS and FM modulation.

7. the system as claimed in claim 1, is characterized in that, described user terminal (104) deploy has following functional module:

-channel manage module, comprises three major functions: 1) program list function, the program list information that this module receiving center server issues, and user optionally receives oneself interested programme content according to list information; 2) program selection function, is converted to corresponding frequency range by the selection of user to program, sends to digit broadcasting system RDS receiver with the form of parameter; 3) program booking function, according to the analysis result to user behavior, the interested program of subscribing user possibility, and the frequency range corresponding to the program needing to subscribe is sent to time triggered module with parametric form;

-user behavior excavates module, the historical record of program channel is selected to analyze the potential information preference of user according to user, and the programme information in the rendition list provided in binding channel administration module generates the rendition list of each free time section needs reception automatically, and this program list information subscribed is sent to channel manage module; User's historical behavior record saves the program preference information of user in a time period, is stored in the form of a file in receiving terminal;

-time triggered module, receives the reservation programme information sent by channel manage module, receives corresponding programme content according to the timetable triggered digital broadcast system RDS receiver that each subscribes program; Digit broadcasting system RDS receiver isolates stereo audio and Word message after receiving FM broadcast singal after the process of the step such as demodulation, decoding, and wherein Word message is sent to data processor and processes;

-data processor, after making ground literal coded treatment, is sent to memory and stores or be directly inputted to user interface the original character information exported by digit broadcasting system RDS receiver.

8., based on the method that the customized information of digit broadcasting system RDS customizes, it is characterized in that, utilize the system described in claim 1, concrete steps are as follows:

1) the initial seed CMOS macro cell of central server is towards the URL seed website of particular topic, crawls module and first starts with from initial seed URL and extract the URL that new URL crawls as next step, added queue to be collected;

2) central server crawls module and carries out the page according to URL and crawl, and extracts new URL and added queue to be collected;

3) central server Controlling UEP module calculates the degree of correlation of each Web page and the theme crawled; URL corresponding to the page forward for sequence according to sorting from high to low, is added queue to be collected according to the degree of correlation of each page and theme by order module;

4) central server URL administration module reads URL and distributes to and crawl module from queue to be collected;

5) central server page parsing module reads the result of degree of subject relativity sequence, and the Web page high to degree of subject relativity is resolved, and extracts information corresponding to each label field of Web page and stored in database;

6) data transmission blocks of central server will divide the information of class to send to home server by theme in database;

7) data reception module of home server receives the Word message that central server sends;

8) the text snippet module of home server carries out text snippet process generation summary info to the Word message received, and stored in database;

9) data sectional of home server and standardized module read out data to be sent from database, if data are excessive, exceed the maximum payload that can carry of digit broadcasting system RDS Frame, then according to digit broadcasting system RDS reference format, segment processing is carried out to data to be sent, and encapsulate with the data format of standard;

10) data to be sent through segmentation and standardization are sent to digit broadcasting system RDS signal reflector by the data transmission blocks in home server;

11) after digit broadcasting system RDS signal transmitter receipt to the data sent from home server, digit broadcasting system RDS coding is carried out to it, digit broadcasting system RDS modulates, carry out FM modulation together with voice signal to be sent simultaneously, generate FM modulation signal, then sent by VHF-FM transmitter;

12) receiving terminal starts FM broadcast receiving function;

13) user is at receiving terminal choosing a topic, initiates the request of acquisition of information;

14) if there is corresponding information under this theme, corresponding theme checks that counter adds 1, and from buffer memory, reads out corresponding information and output on display device; If there is not corresponding information under this theme, corresponding theme request is that empty counter adds 1;

15) judge whether to need ending message to browse, if user does not wish that ending message is browsed, jump to the 13rd) step, otherwise enter next step;

16) check that number of times and corresponding theme request are the value write user historical record of sky number of times by recording corresponding theme;

17) user is calculated to the Long-term Interest degree of each theme according to historical record;

18) user is calculated to the short-term interest degree of each theme according to historical record;

19) comprehensive Long-term Interest degree and short-term interest degree calculate user at the interest-degree of current time to each theme, and sort according to interest-degree height;

20) read in the rendition list of each channel, and select in conjunction with interest-degree ranking results and most possible broadcast program corresponding to the interested information of user as scheduled program;

21) read out the broadcast start/stop time of scheduled program from the rendition list, according to this of trigger start-up time in moment;

22) the continuous poll of Trigger of time checks that whether arriving program broadcasts the moment, if arrived the broadcast moment of scheduled program, jumps to the 23rd) step, otherwise jump to the 24th) step;

23) the current program whether receiving other channels of user is judged, if not, then jump to the 24th) step, if user is receiving the program of other channels really, then jump to the 25th) step;

24) carry out FM demodulation, digit broadcasting system RDS demodulation and digit broadcasting system RDS to the FM FM signal received to decode;

25) buffer memory is carried out to through the decoded Word message of digit broadcasting system RDS;

26) if user is receiving the program of other channels, then point out user the need of the channel being switched to scheduled program; If user selects no, then jump to the 24th) step, otherwise jump to the 27th) step;

27) be switched to the channel corresponding to scheduled program, and jump to the 24th) step;

After above step, receiving terminal can excavate the potential information preference of user while user's browsing information, select scheduled program in conjunction with the rendition list simultaneously, after arriving the scheduled program broadcast moment, download the digit broadcasting system RDS Word message that also buffer memory transmits with scheduled program browse for user.

9. method as claimed in claim 8, is characterized in that, step 17) described in the computational methods of Long-term Interest degree be

Wherein, sum (i) represents that information accumulative of user to the i-th class theme checks number of times, represent that user checks number of times to the accumulative of the information of all themes;

Step 18) described in the computing formula of short-term interest degree be:

Wherein, represent that user checks to the newly-increased of the information of certain theme the newly-increased ratio checking number of times that number of times accounts for the information to all different themes in nearest measurement period, 1-exp (-unresponse (i)) expression asks the information of certain class theme continuously by user and without responding the user of this situation reflection to the interest-degree of certain class theme, wherein unresponse (i) represents user to the delivering request of the i-th class theme without the number of times responded.

10. method as claimed in claim 9, is characterized in that, step 19) described in the computing formula of interest-degree be

Interest (i) represents the interest-degree of user to the information of the i-th class theme, it is obtained by Long-term Interest degree long (i) and short-term interest degree short (i) weighted sum, and wherein α and β represents that Long-term Interest degree and short-term interest degree are to the contribution factor of user interest degree respectively.