CN102857349A - 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

A kind of system and method that customizes based on the customized information of RDS

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of system and method that customizes based on the customized information of RDS communication mode.

Background technology

It is wide that the Internet has spread scope as the very strong communication means of a kind of interactivity, and real-time is high, the characteristics that contain much information.Yet along with the explosive growth of amount of information, people tend to " being 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.The Extraordinary information service is so that the user can get access to own interested information in time, exactly from the Internet.Traditional the Internet era, Website server comes the individual demand of analysis user by obtaining the cookie information (number of times, the access time that certain web website is accessed and the information such as path that enter website) that resides in subscriber's local, so that pointed information service to be provided.Entering web after 2.0 epoch, the customized information polymerization instrument take technology such as Atom, RSS as representative so that the user from passively, blindly reception information becomes on one's own initiative, selectively reception information becomes possibility.

Compare with the Internet, other communication media has separately propagation advantage and limitation such as newspaper, TV, broadcasting etc.And RDS (Radio Data System, digit broadcasting system) is widely used in broadcast world as a kind of novel Information Communication means.It is in the FM broadcasting middle a kind of technology of utilizing subcarrier that station name, program category, programme content and other information are sent in digital form that transmits.Just can identify these digital signals by the tuner with RDS function, become character and be presented on the display screen.The user only needs a broadcast receiver with RDS function just can arrive abundant in content digital information by Real-time Obtaining.At present, this technology mainly is used in the transport information navigation field.Consider that the RDS technology has the propagation characteristic of broadcasting and conventional internet concurrently, coming the information on the transport of internet by the channel of broadcasting 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 require that also the user has certain professional skill.This will be a kind of easily acquisition of information approach for the low-income groups in vast rural area and the city.

With to utilize the Internet to diffuse information the same, adopt RDS to come transmission information to face equally the problem of information overload.Therefore, how for making up a kind of Extraordinary information service environment, the information propagation pattern based on RDS to become the problem that need to solve.Than traditional the Internet, mode based on RDS is faced with more challenge: at first, RDS depends on FM (Frequency Modulation) FM broadcasting, it is in fact that a kind of single-point is to the unidirectional Information Communication pattern of multiple spot, owing to be unidirectional communication, the user can't send request to server in real time, so server can't be known according to user's browsing mode user's individual demand.Secondly, the rate of information throughput of RDS is very low, only has 1187.5bps, and the information of transmitting magnanimity with low speed like this is impossible.Just because of this, more be necessary to provide as the user with a definite target in view take the limited bandwidth resources of RDS the information service of " customized ".

Summary of the invention

The customized information custom-built system and the method that the purpose of this invention is to provide a kind of movement-based terminal RDS communication mode.In broadcast listening, can not only obtain real-time Word message based on user of the present invention, simultaneously, use record according to user's history, native system can also be excavated user's acquisition of information preference and (for example, more be ready to obtain about the information aspect which in certain period; Perhaps, which the more interested content of user is), automatic reception is also stored the interested information of user's possibility.

Technical scheme provided by the invention is as follows:

A kind of system of the customized information customization based on RDS is characterized in that described system comprises following assembly (ginseng Fig. 1): central server 101, many playscripts with stage directions ground server 102, a plurality of RDS signal projector 103, a plurality of receiving terminal 104; Wherein:

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

-home server 102 is deployed in place, each professional FM broadcasting station, be responsible for receiving the polymerization that issues from central server 101 good determine the information of theme about a certain class, it is carried out text snippet processes; Then, segmentation and format processing are carried out according to the standard of RDS in the result of text snippet; Then the data after segmentation and the format are sent to RDS signal projector 103;

-RDS signal projector 103, be a covering device that is deployed in each professional FM broadcasting station, it carries out the RDS modulation with the digital information that receives, and then the voice signal with needs broadcasting carries out the FM modulation, form the FM FM signal, launch by the VHF-FM transmitter at last;

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

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

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

B) central server will be resolved the data that extract through the page and be deposited database in;

C) central server will send to the data of certain Topic relative and be deployed in the home server of locating with certain professional FM broadcasting station of this Topic relative;

D) home server that is deployed in place, professional FM broadcasting station carries out the text snippet processing to the information that receives;

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

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

G) home server sends to the RDS signal projector with packaged data;

H) the RDS signal projector carries out RDS coding and RDS modulation after receiving data to be sent;

I) the RDS signal projector with carrying out the FM modulation through the signal after the RDS modulation, obtains the stereo fm signal with voice signal;

J) the RDS signal projector sends the FM FM signal that obtains by the VHF-FM transmitter;

K) receiving terminal receives the FM FM signal that the RDS signal transmitter sends by the VHF-FM receiver;

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

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

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

O) information browse of receiving terminal recording user is historical, 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 of excavating, select the program channel of the most identical user profile preference as candidate's channel, receive and store corresponding Word message and prepare against the user and browse there not being when program broadcasts, to switch in the situation of manual intervention this channel.

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.

Link to each other by the Internet between described central server 101 and the home server 102; Carry out transfer of data by local area network (LAN) or USB interface between home server 102 and the RDS signal projector 103.

Described central server 101 is a computer, and the above is deployed with following functional module:

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

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

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

-degree of correlation analysis module: calculate the Web page and the degree of correlation of its link with current theme that are crawled, only have the higher Web page of degree of subject relativity that the necessity that crawls is just arranged;

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

-page parsing module: the file structure to the Web page that crawls is resolved, and extracts the corresponding information of each label field and deposits database in;

-data transmission blocks: be responsible for connecting with the home server that is deployed in each professional broadcasting station, divided the information of class to send to home server by theme with being stored in the database.

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

-data reception module: be responsible for establishing a communications link with central server, receive the Word message of the Topic relative that issues from central server;

-text snippet module: because the transmission rate of RDS is compared other transmission meanss (such as Wifi, GPRS) all much lower (1.1875kbps), therefore not too be suitable for transmitting the information of big data quantity, in the data volume that does not reduce to transmit in the drop-out entropy as far as possible; The responsibility of text snippet module is to utilize existing text snippet algorithm to the Word message about certain theme that the receives processing of making a summary, and extracts brief and concise summary info;

-data sectional and standardized module: because the payload user data that can hold is limited in each Frame of RDS, therefore, if data volume to be sent more greatly then utilize this module that it is carried out segment processing, is transmitted with a plurality of Frames; After segmentation is finished, respectively each segmentation is carried out standardization according to the data format of RDS;

-data transmission blocks: this module is responsible for connecting with the RDS reflector, will send to through the data of segmentation and standardization the RDS reflector, for RDS modulation and FM modulation.

Described user terminal 104 deploy have following functional module:

-channel manage module comprises three major functions: 1) program list function, and the program list information that this module receiving center server issues, the user optionally receives own interested programme content according to list information; 2) program selection function is converted to corresponding frequency range with the user to the selection of program, sends to the 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 corresponding frequency range of program that will need to subscribe sends to the time trigger module with parametric form;

-user behavior excavates module, analyze user's potential information preference according to the historical record of user selection program channel, and the programme information in the rendition list that provides in the binding channel administration module generates each section the rendition list that need to receive automatically free time, and the program list information of this reservation is sent to the channel manage module; User's historical behavior record has been preserved the program of user in a time period and has been selected information, is stored in the receiving terminal with the form of file;

-time trigger module receives the reservation programme information that is sent by the channel manage module, triggers the RDS receiver according to each timetable of subscribing program and receives corresponding programme content; The RDS receiver is isolated stereo audio and Word message after the processing through steps such as demodulation, decodings after receiving the FM broadcast singal, wherein Word message sends to data processor and processes;

-data processor after doing the processing of ground literal coding by the original character information of RDS receiver output, is sent to memory stores or is directly inputted to user interface.

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

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

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

3) central server degree of correlation analysis module calculates each Web page crawl and the degree of correlation of theme; Order module, adds device to be launched with the forward corresponding URL of the page of ordering and gathers formation according to sorting from high to low according to the degree of correlation of each page and theme;

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

5) central server page or leaf parsing module reads the result of degree of subject relativity ordering, and the Web page that degree of subject relativity is higher is resolved, and extracts the corresponding information of each label field of the Web page and deposits database in;

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

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

8) the text snippet module of home server is carried out text snippet processing generation summary info to the Word message that receives, and deposits database in;

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

10) data transmission blocks in the home server will send to the RDS signal projector through the data to be sent of segmentation and standardization;

11) the RDS signal projector carries out RDS coding, RDS modulation to it after receiving the data that send from home server, carries out the FM modulation together with voice signal to be sent simultaneously, generates the FM modulation signal, then sends by the VHF-FM transmitter;

12) receiving terminal starts the FM broadcast receiving function;

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

14) if exist under this theme corresponding information then corresponding theme check that counter adds 1, and from buffer memory, read out corresponding information and output on the display device; If do not exist under this theme corresponding information then corresponding theme request add 1 for empty counter;

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

16) will record the value that corresponding theme checks that number of times and corresponding theme request are empty number of times and write the access customer historical record;

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

18) calculate the 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 certain short time cycle, its reflection only be the preference of user within certain specific time period;

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

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

21) the broadcast start-stop that reads out scheduled program from the rendition list constantly, according to this constantly start-up time trigger;

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

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

24) the FM FM signal that receives is carried out FM demodulation, RDS demodulation and RDS decoding;

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

26) if the user is receiving the program of other channels, then whether prompting user needs to switch to the channel of scheduled program; If user selection is no, then jump to the 24th) step, otherwise jump to the 27th) step;

27) switch to the corresponding channel of scheduled program, and jump to the 24th) step;

Through after the above step, receiving terminal can be excavated user's potential information preference in user's browsing information, while is selected scheduled program in conjunction with the rendition list, and download and buffer memory are browsed for the user with the RDS Word message that scheduled program transmits after arriving scheduled program to broadcast the moment.

Preferably, the computational methods of Long-term Interest degree are step 17)

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

Wherein, sum (i) expression user checks number of times to the accumulative total of the information of i class theme,

The expression user checks number of times to the accumulative total of the information of all themes;

The computing formula of the interest-degree of short-term step 18) is:

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

Wherein,

Be illustrated in user in the nearest measurement period the newly-increased number of times of checking of the information of certain theme is accounted for the newly-increased ratio of checking number of times to the information of all different themes, 1-exp (unresponse (i)) expression is asked the information of certain class theme continuously by the user and without the user of this situation reflection of the response interest-degree to certain class theme, wherein unresponse (i) expression user is to the delivering request of i class theme and without the number of times of response.

Preferably, the computing formula of interest-degree is step 19)

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

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

Beneficial effect of the present invention: utilize technical scheme provided by the invention, the user can automatic reception in broadcast listening, download, processing and the storage Word message about certain theme by the RDS transmission, and simultaneity factor can automatically be adjusted broadcast band that needs monitor with the most possible interested information of automatic acquisition user and integrated according to the user's who excavates information preference.

Description of drawings

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

Fig. 2 is system of systems workflow diagram 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 invention.

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

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

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

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

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

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

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 carrying out webpage by theme from the Internet and to crawl, and extracts the computer of word content.It is made 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) and locates.

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

3.RDS signal projector.The RDS signal projector is the broadcast signal transmission system that is deployed in each inside, professional FM broadcasting station.The literal that sends from home server that it will receive carries out the RDS modulation, and then the sound programme with the broadcasting station carries out the FM modulation, forms modulation signal, sends by the VHF/FM transmitter at last.RDS signal projector 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 user's handheld device, in order to receiving broadcast signal, and demodulates voice signal and the Word message that comprises in the broadcast singal.Receiving terminal is made 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.After receiving terminal received the wireless signal of radio station emission by the VHF/FM receiver, wherein one road signal was delivered to stereo demodulator and is carried out the FM demodulation, and the audio signal that demodulation obtains is play by loud speaker or earphone.Two paths of signals recovers RDS baseband signal and subcarrier by band pass filter respectively in addition.The RDS baseband signal is carried out bit timing pick-up with subcarrier signal by multiplier on the one hand, the RDS signal is input in the RDS decoder on the other hand, the RDS decoder utilizes the bit timing pick-up signal to decode 0/1 digital information from the RDS baseband signal, through behind the digital processing unit, recover original text message.

Link to each other by the Internet between central server and the home server, carry out transfer of data by local area network (perhaps USB interface) between the RDS reflector in home server and broadcasting station.

Involved in the present invention to embodiment consisted of by three sub-systems particularly, operate in respectively on central server, home server and the receiving terminal.Fig. 5, Fig. 6, Fig. 7 have provided respectively the system framework figure of this three sub-systems.

The major function of central server is the Web page on minute focused crawl the Internet, and the Web page is resolved, and extracts corresponding word content.Its software architecture has comprised altogether as shown in Figure 5: initial seed module, URL administration module, crawl module, degree of correlation analysis module, order module, page parsing module and data transmission blocks.Cooperation relation between the modules is described below:

● initial seed module: be used for generating the preferably seed website towards particular topic, can carry out smoothly the work of crawling so that crawl module.Crawl module and at first start with from initial seed URL and extract new URL as next step URL that crawls, it is added gather formation.

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

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

● degree of correlation analysis module: calculate the Web page and the degree of correlation of its link with current theme that are crawled, only have the higher Web page of degree of subject relativity that the necessity that crawls is just arranged;

● order module: the degree of correlation according to the Web page and theme sorts to URL, and the corresponding URL adding of the Web page that degree of subject relativity is higher preferentially crawls formation.

● page parsing module: the file structure to the Web page that crawls is resolved, and extracts the corresponding information of each label field and deposits database in.

● data transmission blocks: be responsible for connecting with the home server that is deployed in each professional broadcasting station, divided the information of class to send to opposite end by theme with being stored in the database.

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

● data reception module: be responsible for establishing a communications link with central server, receive the Word message of the Topic relative that issues from central server;

● text snippet module: because the transmission rate of RDS is compared other transmission meanss (such 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 that does not reduce to transmit in the drop-out entropy as far as possible.The responsibility of text snippet module is to utilize existing text snippet algorithm to the Word message about certain theme that the receives processing of making a summary, 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 more greatly then need it is carried out segment processing, is transmitted with a plurality of Frames.After segmentation is finished, respectively each segmentation is carried out standardization according to the data format of RDS.

● data transmission blocks: this module is responsible for connecting with the RDS reflector, will send to through the data of segmentation and standardization the RDS reflector, for RDS modulation and FM modulation.

The software systems of moving on the receiving terminal have comprised following main modular as shown in Figure 7 altogether: user behavior excavates module, time trigger module, channel manage module and user's historical behavior record, user interface, memory, data processor and RDS receiver.

● the channel manage module comprises three major functions: 1) program list function.The program list information that this module receiving center server issues, the user optionally receives own interested programme content according to list information; 2) program selection function.The user is converted to corresponding frequency range to the selection of program, sends to the 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 corresponding frequency range of program that will need to subscribe sends to the time trigger module with parametric form.

● user behavior excavates module analyzes the user according to the historical record of user selection program channel potential information preference, and the programme information in the rendition list that provides in the binding channel administration module generates each section the rendition list that need to receive automatically free time, and the program list information of this reservation is sent to the channel manage module.User's historical behavior record has been preserved the program of user in a time period and has been selected information, is stored in the receiving terminal with the form of file.

● the time trigger module receives the reservation programme information that is sent by the channel manage module, triggers the RDS receiver according to each timetable of subscribing program and receives corresponding programme content.The RDS receiver is isolated stereo audio and Word message after the processing through steps such as demodulation, decodings after receiving the FM broadcast singal, wherein Word message sends to data processor and processes.

● data processor is sent to memory stores or is directly inputted to user interface after doing the processing of ground literal coding by the original character information of RDS receiver output.

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

At first, on central server, the theme of the definite information that need to crawl of system.Then carry out crawling of subject-oriented, the Web page that crawls is resolved, the Word message that extracts is stored in the database, in order to after this information in the database is sent to the home server that is deployed in the FM broadcasting station of this Topic relative according to theme.

After home server receives the information that central server issues, at first it is carried out text snippet and process and deposit database in, after summary texts is carried out segmentation and standardized packages, send to the RDS signal projector by data transmission blocks.

After the RDS signal projector receives the data that need to send, at first it is carried out the RDS modulation, the signal after then will modulating and voice signal carry out stereo FM modulation, by the VHF/FM transmitter this signal are sent at last.

At receiving terminal, the VHF/FM receiver receives the FM FM signal that the FM frequency range of monitoring sends, and obtains the Word message that comprises in the RDS signal after processing through FM demodulation, RDS demodulation and decoding.Receiving terminal at first extracts program list information, adjusts to corresponding frequency range if the user needs switching channels to receive its interested other programs and receives the FM broadcast singal, if the user does not need to switch frequency range then receives the signal that current frequency range is broadcasted.The FM signal that receives is carried out FM demodulation, RDS demodulation, RDS decoding, and the Word message that buffer memory obtains is until the broadcast program end of listening to.In broadcast listening program and buffer memory RDS Word message, the user can browse and be cached to local classified information.The record of browsing of recording user is understood by system, generates corresponding journal file when finishing browsing information.Then, system reads newly-generated journal file, according to the potential interest preference of user's browsing histories digging user, according to user's interest preference and the rendition list of next 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 will switch to channel corresponding to program according to trigger start-up time beginning and ending time of scheduled program at the moment prompting user that arrives program broadcasting time, otherwise wait for.

Referring to 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 invention: the dissimilar subject matters such as economy, current events, life, health, education, physical culture.The RDS Word message that has comprised downloaded stored under such theme below every class subject matter.If about the information of certain class theme, then the download items under such theme is not empty.

In the process of carrying out the user personalized information customization, the concrete technical scheme of the method for taking is described below:

After system started, the user at first clicked certain theme on as shown in Figure 8 the interface, if be cached with relevant information under this theme, then read in relevant information and be presented on the display device from buffer memory, and the number of times of checking of corresponding theme adds 1 simultaneously; 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 the user finished this information browse, system was write this information browse record of user in the access customer history file.Then system reads the information preference that content in the history file begins digging user.When calculating the user for the interest-degree of certain class theme, the present invention has considered the factor of two aspects: user's Long-term Interest feature and short-term interest characteristics.User's Long-term Interest feature is the habitual behavior that a people forms for a long time, is presented as that in the present invention the user dotes on degree to the information of certain class subject matter intrinsic, and this interest value is relatively stable, is subjected to the impact of the factors such as time, environment less.User's short-term interest characteristics has then embodied user's fancy grade for certain class theme within certain specific time period, it is subjected to the impact of time, environment etc. larger, therefore relative Long-term Interest feature, the short-term interest characteristics has embodied the 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) expression user is to the interest-degree of the information of i class theme, it is by Long-term Interest degree long (i) and short-term interest-degree short (i) weighted sum and get, and wherein α and β represent that respectively Long-term Interest degree and short-term interest-degree are to the contribution factor of user interest degree.

The user can be embodied the attention rate of the information of certain class theme by the user for a long time to the Long-term Interest degree of certain class theme i, in the present invention, the user has been recorded to the number of times of checking of the information of all kinds of themes in user's historical behavior record the inside, the user has then embodied the relative degree of concern of user to the information of these themes to the rate of checking of the information of all kinds of themes, therefore in the present invention, user's Long-term Interest degree 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) expression user checks number of times to the accumulative total of the information of i class theme,

The expression user checks number of times to the accumulative total of the information of all themes.Its merchant has then been reflected for a long time degree of concern of i class theme of user, that is to say the Long-term Interest degree.

User's short-term interest-degree can be reflected by the user behavior of user within certain time period.For example, if the user is interested in the information of certain class theme within certain time period, then will inevitably within this specific time period, to such theme the higher rate of checking be arranged, and this value of checking rate is not stably within long time cycle, and its can have apparent in view fluctuation and fluctuating within some time period.In addition, the user can also reflect for empty number of times from request the short-term interest-degree of certain class theme.If the user repeatedly asks to check the information of certain class theme, but all return sky, illustrate that the user has comparatively urgent need to such other information, it is higher to the short-term interest-degree of this theme to reveal the user from a side surface body.Therefore, the user can be expressed as the short-term interest-degree of certain class theme:

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

Following formula has two parts to consist of, and front portion (namely

) be illustrated in user in the nearest measurement period the newly-increased number of times of checking of the information of certain theme is accounted for the newly-increased ratio of checking number of times to the information of all different themes.Rear portion (being 1-exp (unresponse (i))) expression is asked the information of certain class theme continuously by the user and without the user of this situation reflection of the response interest-degree to certain class theme, wherein unresponse (i) expression user is to the delivering request of i class theme and without the number of times of response.

The user checks the historical behavior of the information of all kinds of themes among table 1 embodiment

As shown in Figure 9, be the rendition list involved among the embodiment among the present invention.This rendition list is regularly downloaded from central server by the channel manage module.This program menu has comprised programm name and corresponding subject classification that each channel broadcasts in different time sections, is " financial and economic news " at 8:00 to the program that 9:00 broadcasted in the time period such as economic channel, and the subject matter under it is " economy ".According to program broadcasting time and the classification of each program and user's the potential interest domain of each channel, system can make the programme content that need to receive in different time sections in order to automatically recommend the user.Obtain after the interest-degree of user about each theme, can excavate the theme that the user is most interested in according to sorting from high in the end, in conjunction with the rendition list of each channel, can select scheduled program to the interest-degree of each theme and the corresponding theme of each channel broadcast program according to the user.According to scheduled program begin to play constantly trigger start-up time, whether prompting user needs to automatically switch to corresponding channel when arriving program and broadcast constantly, if the user agree then switch to corresponding channel, receive and buffer memory RDS Word message; If the current channel that is in the scheduled program place of user then continues to receive and buffer memory RDS Word message.

Through namely having finished after the above step user's information preference is excavated and the customized information customization.

Claims (10)

1. system based on the customization of the customized information of RDS, it is characterized in that described system comprises following assembly: a central server (101), many playscripts with stage directions ground server (102), a plurality of RDS signal projector (103), a plurality of receiving terminal (104); Wherein:

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

-home server (102) is deployed in place, each professional FM broadcasting station, be responsible for receiving the polymerization that issues from central server (101) good determine the information of theme about a certain class, it is carried out text snippet processes; Then, segmentation and format processing are carried out according to the standard of RDS in the result of text snippet; Then the data after segmentation and the format are sent to RDS signal projector (103);

-RDS signal projector (103), be a covering device that is deployed in each professional FM broadcasting station, it carries out the RDS modulation with the digital information that receives, and then the voice signal with needs broadcasting carries out the FM modulation, form the FM FM signal, launch by the VHF-FM transmitter at last;

-receiving terminal (104), it is user's handheld device, be responsible for the FM FM signal that receives is carried out FM demodulation, RDS solution mediation RDS decoding, and decoded information presented to the user, record simultaneously the acquisition of information preference of digging user according to user's information browse, section is automatically adjusted receiving channels according to a user profile preference of excavating and is received 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) the central server page that at first carries out subject-oriented crawls, and carries out simultaneously the page and resolves, and extracts word content;

B) central server will be resolved the data that extract through the page and be deposited database in;

C) central server will send to the data of certain Topic relative and be deployed in the home server of locating with certain professional FM broadcasting station of this Topic relative;

D) home server that is deployed in place, professional FM broadcasting station carries out the text snippet processing to the information that receives;

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

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

G) home server sends to the RDS signal projector with packaged data;

H) the RDS signal projector carries out RDS coding and RDS modulation after receiving data to be sent;

I) the RDS signal projector with carrying out the FM modulation through the signal after the RDS modulation, obtains the stereo fm signal with voice signal;

J) the RDS signal projector sends the FM FM signal that obtains by the VHF-FM transmitter;

K) receiving terminal receives the FM FM signal that the RDS signal transmitter sends by the VHF-FM receiver;

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

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

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

O) information browse of receiving terminal recording user is historical, 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 of excavating, select the program channel of the most identical user profile preference as candidate's channel, receive and store corresponding Word message and prepare against the user and browse there not being when program broadcasts, to switch in the situation of manual intervention this channel.

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, RDS baseband signal recovery circuit, subcarrier regenerator, 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, links to each other by the Internet between described central server (101) and the home server (102); Carry out transfer of data by local area network (LAN) or USB interface between home server (102) and the RDS signal projector (103).

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

-initial seed module: be used for generating the preferably seed website towards particular topic, can carry out smoothly the work of crawling so that crawl module; Crawl module and at first start with from initial seed URL and extract new URL as next step URL that crawls, it is added gather formation;

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

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

-degree of correlation analysis module: calculate the Web page and the degree of correlation of its link with current theme that are crawled, only have the higher Web page of degree of subject relativity that the necessity that crawls is just arranged;

-order module: the degree of correlation according to the Web page and theme sorts to URL, and the corresponding URL adding of the Web page that degree of subject relativity is higher preferentially crawls formation;

-page parsing module: the file structure to the Web page that crawls is resolved, and extracts the corresponding information of each label field and deposits database in;

-data transmission blocks: be responsible for connecting with the home server that is deployed in each professional broadcasting station, divided the information of class to send to home server by theme with being stored in the database.

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

-data reception module: be responsible for establishing a communications link with central server, receive the Word message of the Topic relative that issues from central server;

-text snippet module: utilize existing text snippet algorithm to the Word message about certain theme that the receives processing of making a summary, extract brief and concise summary info;

-data sectional and standardized module: if data volume to be sent more greatly then utilize this module that it is carried out segment processing, is transmitted with a plurality of Frames; After segmentation is finished, respectively each segmentation is carried out standardization according to the data format of RDS;

-data transmission blocks: this module is responsible for connecting with the RDS reflector, will send to through the data of segmentation and standardization the RDS transmitter, for RDS modulation 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, and the program list information that this module receiving center server issues, the user optionally receives own interested programme content according to list information; 2) program selection function is converted to corresponding frequency range with the user to the selection of program, sends to the 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 corresponding frequency range of program that will need to subscribe sends to the time trigger module with parametric form;

-user behavior excavates module, analyze user's potential information preference according to the historical record of user selection program channel, and the programme information in the rendition list that provides in the binding channel administration module generates each section the rendition list that need to receive automatically free time, and the program list information of this reservation is sent to the channel manage module; User's historical behavior record has been preserved the program of user in a time period and has been selected information, is stored in the receiving terminal with the form of file;

-time trigger module receives the reservation programme information that is sent by the channel manage module, triggers the RDS receiver according to each timetable of subscribing program and receives corresponding programme content; The RDS receiver is isolated stereo audio and Word message after the processing through steps such as demodulation, decodings after receiving the FM broadcast singal, wherein Word message sends to data processor and processes;

-data processor after doing the processing of ground literal coding by the original character information of RDS receiver output, is sent to memory stores or is directly inputted to user interface.

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

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

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

3) central server degree of correlation analysis module calculates each Web page crawl and the degree of correlation of theme; Order module according to sorting from high to low, adds to be collected formation with the forward corresponding URL of the page of ordering according to the degree of correlation of each page and theme;

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

5) central server page or leaf parsing module reads the result of degree of subject relativity ordering, and the Web page higher to degree of subject relativity advances

Row is resolved, and extracts the corresponding information of each label field of the Web page and deposits database in;

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

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

8) the text snippet module of home server is carried out text snippet processing generation summary info to the Word message that receives, and deposits database in;

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

10) data transmission blocks in the home server will send to the RDS signal projector through the data to be sent of segmentation and standardization;

11) the RDS signal projector carries out RDS coding, RDS modulation to it after receiving the data that send from home server, carries out the FM modulation together with voice signal to be sent simultaneously, generates the FM modulation signal, then sends by the VHF-FM transmitter;

12) receiving terminal starts the FM broadcast receiving function;

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

14) if exist under this theme corresponding information then corresponding theme check that counter adds 1, and from buffer memory, read out corresponding information and output on the display device; If do not exist under this theme corresponding information then corresponding theme request add 1 for empty counter;

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

16) will record the value that corresponding theme checks that number of times and corresponding theme request are empty number of times and write the access customer historical record;

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

18) calculate the user 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 the user at the interest-degree of current time to each theme, and just sort according to interest-degree;

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

21) the broadcast start-stop that reads out scheduled program from the rendition list constantly, according to this constantly start-up time trigger;

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

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

24) the FM FM signal that receives is carried out FM demodulation, RDS demodulation and RDS decoding;

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

26) if the user is receiving the program of other channels, then whether prompting user needs to switch to the channel of scheduled program; If user selection is no, then jump to the 24th) step, otherwise jump to the 27th) step;

27) switch to the corresponding channel of scheduled program, and jump to the 24th) step;

Through after the above step, receiving terminal can be excavated user's potential information preference in user's browsing information, while is selected scheduled program in conjunction with the rendition list, and download and buffer memory are browsed for the user with the RDS Word message that scheduled program transmits after arriving scheduled program to broadcast the moment.

9. method as claimed in claim 8 is characterized in that 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) expression user checks number of times to the accumulative total of the information of i class theme,

The expression user checks number of times to the accumulative total of the information of all themes;

The computing formula of the interest-degree of short-term step 18) is:

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

Wherein,

Be illustrated in user in the nearest measurement period the newly-increased number of times of checking of the information of certain theme is accounted for the newly-increased ratio of checking number of times to the information of all different themes, 1-exp (unresponse (i)) expression is asked the information of certain class theme continuously by the user and without the user of this situation reflection of the response interest-degree to certain class theme, wherein unresponse (i) expression user is to the delivering request of i class theme and without the number of times of response.

10. method as claimed in claim 9 is characterized in that 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) expression user is to the interest-degree of the information of i class theme, it is by Long-term Interest degree long (i) and short-term interest-degree short (i) weighted sum and get, and wherein α and β represent that respectively Long-term Interest degree and short-term interest-degree are to the contribution factor of user interest degree.

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