CN100493176C - Establishing method and searching method for realizing datalist of television program search - Google Patents
Establishing method and searching method for realizing datalist of television program search Download PDFInfo
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Abstract
A method for setting up data table to realize search of TV program includes picking up information being able to confirm event uniquely from EPG information, making keyword corresponding to said event according to EPG information and using keyword to describe character of corresponding event, setting up event keyword table presenting relation of event to keyword according to relevant ruled syntax on EPG information table in digital TV standard .The means to carry out program search by utilizing said method is also disclosed .
Description
Technical field
The present invention relates to digital TV field, particularly a kind of method for building up and searching method of realizing the tables of data of television program search.
Background technology
We know that the growth of television programming provider or TV station's quantity is very rapid, and people only use a satellite receiver at present, can watch hundreds of television channels at home.Review the past, early stage in internet development, because there is not search engine, people get lost in the internet information of magnanimity through regular meeting, until the appearance of Yahoo (Yahoo) search engine, just make people have the ability to find the information of wanting.We have run into similar problem in television system now: along with the appearance of Digital Television, in the near future, television channel quantity can rapidly increase with exponential form.Therefore TV user needs a kind of effective and efficient manner to find out to want the channel seen, rather than picture is being browsed time waste on all channels when going over channel searching.
Solution to the problems described above is to provide electronic program guides (EPG) information to the user at present, and described electronic program guide information generally comprises the classified information (as film, news, physical culture etc.) of channel designation, programm name, program description, broadcast time and program etc.The user is when searching program, only need to use set-top box remote controller television screen to be switched to the interface of electronic program guides, just can see programm name, broadcast time and the program brief introduction of a period of time with each digital TV channel in interior (in a week), except searching in chronological order the program, electronic program guides can also allow you search according to program classification to want the program seen, as search film, promptly can obtain the relevant information of the film that will play in a period of time, comprise movie name, corresponding channel designation, movie contents introduction etc.
Simply introduce the realization of electronic program guides in two main number television standards (U.S. ATSC and European DVB standard) below.Described electronic program guide information is at the conceptive many tables (table) that are divided into, described table is divided into plurality of sections (section) again, pack according to Moving Picture Experts Group-2, (TS) sends user terminal to by mpeg 2 transport stream, described TS is multiplexing, simultaneously also is used for transmitting the signals such as sound, video of TV.Different tables is distinguished with different bag marks (PID) in TS stream, user terminal is after receiving the electronic program guide information that described TS sends, be presented on the video screen after can handling through digital TV set-top box, check listing or select program for the user.After the user selected certain program, set-top box can filter out the audio frequency and video TS bag of this program, plays on video screen after treatment.
Use performance system information protocol (PSIP) to transmit described electronic program guide information in the ATSC standard, table relevant with TV programme itself in described PSIP information mainly comprises: virtual channel table (VCT) table, Event Information Table (EIT).Main contents in VCT table and the EIT table such as attached illustrated in figures 1 and 2, mainly comprise among the VCT channel (dominant frequency Taoist monastic name major num. and frequency division Taoist monastic name minornum.), channel breviary name (short name), program number (progr.num.), expanded text position (not shown), this table the ID value contents such as (channel TSID) that flows of corresponding TS.Mainly comprise the title of event number (event id), local time started (local start time), duration (length among the described EIT, in second) and incident title information such as (title), described incident is the exemplary program in the virtual channel that defines among the described VCT, as the incident id in the NBZ-S channel 53 incident: be the Car Racing program that begins and continue 9000 seconds (150 minutes) from 15:30, be an incident; Comprise incident expanded text (ETM) among the described ETT, this content is optionally, is used to provide the detailed description about described virtual channel and incident.
More than mainly select from PSIP agreement---the Program and System Information Protocol for Terrestrial Broadcast and Cable (Revision B) of ATSC Standard about the content of ATSC standard.
And in the DVB standard, described electronic program guide information is made up of program specific information (PSI) and two parts of business information (SI).
Described PSI comprises four tables: Program Association Table (PAT), Program Map Table (PMT), Conditional Access table (CAT), network information table (NIT).Utilize PSI from a TS who carries a plurality of programs, correctly to find specific program, idiographic flow is as follows, when receiver will receive some appointed programs, it at first obtains the pid value of the PMT of this program from PAT, from TS, find out the corresponding PMT of pid value therewith then, from this PMT, obtain the pid value of the elementary stream of this program of formation, leach elementary streams such as corresponding video, audio frequency and data according to this pid value, the decoding back is restored and is primary signal, and deletion simultaneously contains the transmission bag of all the other PID.
The physical transfer net information such as channel tuning parameter, frequency, symbol rate that comprise program among the described NIT, these information make receiver correctly to decode TS according to user's selection with seldom time-delay or have time-delay ground and change channel, tuner parameters; Described the cipher mode of program among the described CAT, the EMM identification PID that it has comprised program has only the decoder of mandate to receive key by CAT, decodes corresponding data flow.
PSI only provides the information of single TS, the reception function is decoded to the different program streams among the single TS, but it can not provide the relevant business of a plurality of TS and program type, what program, information such as when begin, therefore the DVB system expands PSI, the multiple form of other different information categories is provided, has formed SI.
Comprise nine tables among the described SI, wherein relevant with program main table is following three tables:
1) BAT:BAT table provides the information of related relevant program bouquet, comprises the program business list that program bouquet title and program bouquet are comprised.Utilize BAT can carry out browsing and selecting of related-program or a certain class program easily.
2) SDT:SDT table be used for the type of service (as PAL, NTSC, SECAM, FM broadcasting, teletext, quasi-video request program etc.) of descriptive system title, service supplier, whether the information of aspects such as events corresponding description list is arranged; SDT Service Description Table can be described current transport stream, also can describe other transport stream, is distinguished by the Table ID that shows.
3) EIT:EIT table comprises the relevant data of incident or program, as the title of incident, time started, time span, running status etc.
But after carefully studying above-mentioned digital television standard ATSC and DVB standard carefully, can find that the description to programm name and content only comprises some text messages usually in the existing digital television standard, and not be suitable for the search purposes.
Summary of the invention
At the problems referred to above, purpose of the present invention just is to provide a kind of more simple television program way of search, people can more easily be found want the program of seeing.
In order to achieve the above object, the present invention proposes a kind of method for building up of realizing the tables of data of television program search, be used for carrying out television program search in electronic program guides (EPG) information, this method may further comprise the steps,
Extracting in electronic program guide information can unique information of determining described incident;
According to the keyword (keyword) of electronic program guide information formulation corresponding to described incident, described keyword is used to describe the feature of corresponding incident;
According in the digital television standard incident antistop list (EKT) that is used for expression incident and keyword relation being set up in the respective specified grammer of electronic program guide information table.
Further, in the ATSC standard, each section is according to constructing the grammer of section regulation in the ATSC standard P Session Initiation Protocol among the described EKT, and described keyword root is constructed according to the definition to many character strings in the PSIP agreement.
Further, in the DVB standard, utilize SI table to transmit electronic program guide information, described SI table is used to describe TV program information, it is characterized in that, defines according to the section syntactic definition of SI table in the DVB standard and many character strings and constructs described incident antistop list.
Further, the corresponding a plurality of keywords of a described incident.
Further, the coding of described keyword adopts the multilingual coding.
The invention allows for a kind of list structure of realizing television program search, be used for carrying out television program search at the electronic program guides electronic program guide information, this table is incident antistop list (EKT), described incident antistop list is set up according to the respective specified grammer to the electronic program guide information table in the digital television standard, comprise information and the corresponding keyword keyword thereof of can be unique determining described incident among the described EKT, described information that can unique definite incident is used to find described incident, and described keyword is used to describe the feature of described incident.
Utilize the PSIP table to transmit electronic program guide information in the ATSC standard, further, each section constructed according to the grammer of in the ATSC standard P Session Initiation Protocol section being stipulated among the described EKT,
In the DVB standard, utilize SI table to transmit electronic program guide information, described SI table comprises 9 tables, is used to describe TV program information, further, defines according to the section syntactic definition of SI table in the DVB standard and many character strings and to construct described incident antistop list.
Further, the corresponding a plurality of keywords of a described incident.
Further, the coding of described keyword adopts the multilingual coding.
The invention allows for a kind of method that realizes television program search, be used for carrying out television program search, it is characterized by, may further comprise the steps at the electronic program guides electronic program guide information:
A) set up the incident antistop list;
B) TV user input search key one;
C) plurality of keywords two identical or close with described keyword one found out in the keyword in more described keyword one and the described incident antistop list in the incident antistop list, and further obtain the event number of described keyword two correspondences;
D) find out described event number indication some incidents relevant information and show.
Further, in step a), set up the incident antistop list, and described incident antistop list is delivered to user terminal together with other table in the electronic program guide information by electronic program guide information provider.
Further, under user terminal is preserved described electronic program guide information in step a); Then filter out the incident antistop list in the electronic program guide information under the described preservation in step c), the keyword that utilizes the user to import in described incident antistop list is retrieved.
Further, filter out the incident antistop list in the electronic program guide information in the described transport stream that is sent to the TV user terminal in step c), the keyword that utilizes the user to import in described incident antistop list is retrieved.
Further, user terminal receives electronic program guide information, and program-related information is wherein analyzed, and sets up the incident antistop list and uses for user search.
The present invention sets up a form that is exclusively used in program searching by utilizing original electronic program guide information, and utilizes this form to carry out program searching, has accelerated the speed of program searching, thereby has made TV user save the time that is used for searching TV program greatly.
Description of drawings
Fig. 1 is the example of a VCT table in the ATSC standard P Session Initiation Protocol;
Fig. 2 is the example of an EIT table in the ATSC standard P Session Initiation Protocol;
The example of Fig. 3 incident antistop list of the present invention;
Fig. 4 is a program searching method flow chart of the present invention.
Embodiment
Illustrate that with specific embodiment the method for building up of incident antistop list of the present invention utilizes this table to carry out the method for program searching below.
In order to understand the present invention better, at this structure of described EKT is described earlier, in this regulation the structure of EKT is described according to the PSIP agreement in the ATSC standard, described EKT is the same with other table among the PSIP, also be in the conceptive plurality of sections that is divided into, spread by TS according to Mpeg-2 standard packing and be passed to user terminal.Following table 1 promptly is the syntactic structure of the section in the described incident antistop list:
Grammer bit number form
event_keyword_table_section(){
table_id 8 0xDB
section_syntax_indicator 1 ‘1’
private_indicator 1 ‘1’
reserved 2 ‘11’
source_id 16 uimsbf
reserved 2 ＂11＂
current_next_indicator 1 ‘1’
section_number 8 uimsbf
last_section_number 8 uimsbf
protocol_version 8 uimsbf
num_events_in_section 8 uimsbf
for(j＝0；j<num_events_in_section；j++){
reserved 2 ＂11＂
event_id 14 uimsbf
keyword() var
reserved 4 ＂1111＂
}
}
Table 1
The grammer specific explanations of incident antistop list recited above is as follows:
1) table_id: the uimsbf formatted data that is a 8bit, be used to identify this section and belong to described incident antistop list, select in the span of the table_id that its numerical value can not be used in the PSIP agreement, as being set to any one numeral in 0xCE～0xD2,0xD5～0xDF, 0xE0～0xE5, the 0xE6～0xEF scope; And for the DVB standard, can be set to the arbitrary value of untapped being in " reserved " state, 0x04～0x3F, 0x43～0x45,0x4B～0x4D or 0x79～0x7D.Be set to 0xDB in the PSIP agreement in this routine ATSC standard.
2) section_syntax_indicator: take 1bit, value is set to ' 1 ' 0.
3) private_indicator: take 1bit, value is set to ' 1 '.
4) section_length: be the uimsbf data of a 12bit, be used for identifying this section following closely and up to the byte number of section tail, comprising check digit CRC_32, this numeral should not surpass 4093.
5) source_id: be the uimsbf data of a 16bit, in the VCT table under the PSIP agreement, each virtual channel has a corresponding with it source_id respectively, is used to identify a specific virtual channel.At this, the incident antistop list utilizes described source_id and hereinafter described incident _ id can uniquely determine an incident.
6) version_number: be the uimsbf data of a 5bit, be used to identify the version number of this section, whenever the section content changes, then this section version number adds 1.
7) current_next_indicator: take 1bit, value is set to ' 1 '.
8) section_number: be the uimsbf data of a 8bit, be used to identify the segment number of this section.
9) last_section_number: be the uimsbf data of a 8bit, be used to identify the segment number of the final stage of described incident antistop list.
10) protocol_version: the uimsbf data that are a 8bit, be used to identify the protocol version of described EKT, if promptly change to some extent in the structure of described incident antistop list in the future, then can mark the version number of its variation, be set to " 0 " in this value at present.
11) num_events_in_section: be the uimsbf data of a 8bit, be used for identifying the quantity of the incident that this section describe.This value is generally 0 above integer, if this value is " 0 ", then shows the incident that does not have description in this section, and promptly this keyword does not have corresponding incident at present.
12) incident _ id: be the uimsbf data of a 14bit, be used to identify the identifier of present described incident, described incident _ id and foregoing source_id combine, and represent certain program of certain channel, promptly can uniquely determine an incident.Described incident _ id is used as the identifier of incident in original EIT table, also be the part of the ETM identifier (ETM_id) in original incident expanded text table (ETT) simultaneously, promptly by a pair of specific source_id and incident _ id, can find the content such as event name, channel name, event content description of its corresponding particular event.
13) keyword_length: length keywords is the uimsbf data of a 20bit, is used to identify the shared byte number of keyword () field.
14) keyword: keyword is a variable, introduces in detail in the back.
15) CRC_32: check digit, it is the rpchof formatted data of a 32bit, be according to the annex A of ISO-13818-1 " MPEG-2 Systems " standard definition, be used to guarantee to make the register of decoder behind each section of handling the incident antistop list, to export a null value.
16) Reserved: keep the position, possible modification after being used for.
Below explain in detail the syntactic structure of the keyword that draws according to the relevant regulations in the PSIP agreement, shown in following table 2:
Syntax No.of Bits Format
keyword(){
number_of_keyword 8 uimsbf
for(i＝0；i<number_of_keyword；i++){
number_of_segment 8 uimsbf
for(j＝0；j<number_of_segment；j++){
compression_type 8 uimsbf
mode 8 uimsbf
number_of_byte 8 uimsbf
for(k＝0；k<number_of_byte；k++)
compressed_keyword_byte[k] 8 bslbf
}
}
}
Table 2
1) number_of_keyword: keyword quantity is the uimsbf data of a 8bit, is used to identify the number of all keywords of above-mentioned incident _ id correspondence, represents i keyword with i in the circulation below.
2) ISO_639_language_code: be the uimsbf data of a 24bit, be used to identify the language form of i keyword.In this example, use ISO 639 standards, described ISO 639 is the standard of two or three letter representation category of language of a kind of usefulness, represents with trigram in this example, and then Chinese is " chi " or " zho ", and English is " eng ".If i key words content is Chinese, then can select " chi " for use.
3) number_of_segment: the joint number amount is the uimsbf data of a 8bit, is used for identifying the joint number of follow-up data.Described joint number i.e. the hop count amount that keyword character string is divided into, and represents j segment of i keyword in the circulation below with j.
4) compression_type: compression type, be the uimsbf data of a 8bit, be used to identify the compression type of j joint, shown in the compression type table 3 specific as follows, compression type 0x01 and 0x02 should only limit the use of in the mode value when the 0x00, represent its coded system adopt among the ATSC A/65B table C.4, C.5, C.6, the standard encoding and decoding table of C.7 definition carries out encoding and decoding to data.
| Compression_type | Compression_Method |
| 0x00 | There is not compression |
| 0x01 | Huffman coding, use among the ATSC A/65B table C.4 with the table standard encoding and decoding table of definition C.5 |
| 0x02 | Huffman coding, use among the ATSC A/65B table C.6 with the table standard encoding and decoding table of definition C.7 |
| 0x03～0xAF | Keep |
| 0xB0～0xFF | Be used for other system |
Table 3
5) mode: be the uimsbf data of a 8bit, be used to the content of every joint and the relation between its coding are described that its essence is a kind of compression method, its particular content is shown in following table 4.If the decoder in the TV set-top box of user terminal is not supported certain mode, the character string that then comprises this kind mode can be left in the basket.If use the mode value of 0 x, 01～0 x, 06,0 x, 09～0 x 0E, 0 x, 10,0 x, 20～0 x, 27,0 x, 30～0 x, 33 scopes, then compression_type should be 0x00, does not promptly have compression.During value in the mode value is above-mentioned 0 x, 01～0 x, 06,0 x, 09～0 x 0E, 0 x, 10,0 x, 20～0 x, 27,0 x, 30～0 x, 33 scopes, the bytes that represents this segment represents low eight in one 16 the Unicode coding, and the mode value itself is its high eight-bit.
| Mode | Meaning |
| 0x00 | Select Unicode Code Range 0x0000-0x00FF |
| 0x01 | Select Unicode Code Range 0x0100-0x01FF |
| 0x02 | Select Unicode Code Range 0x0200-0x02FF |
| 0x03 | Select Unicode Code Range 0x0300-0x03FF |
| 0x04 | Select Unicode Code Range 0x0400-0x04FF |
| 0x05 | Select Unicode Code Range 0x0500-0x05FF |
| 0x06 | Select Unicode Code Range 0x0600-0x06FF |
| 0x07-0x08 | Reserved |
| 0x09 | Select Unicode Code Range 0x0900-0x09FF |
| 0x0A | Select Unicode Code Range 0x0A00-0x0AFF |
| 0x0B | Select Unicode Code Range 0x0B00-0x0BFF |
| 0x0C | Select Unicode Code Range 0x0C00-0x0CFF |
| 0x0D | Select Unicode Code Range 0x0D00-0x0DFF |
| 0x0E | Select Unicode Code Range 0x0E00-0x0EFF |
| 0x0F | Select Unicode Code Range 0x0F00-0x0FFF |
| 0x10 | Select Unicode Code Range 0x1000-0x10FF |
| 0x11-0x1F | Reserved |
| 0x20 | Select Unicode Code Range 0x2000-0x20FF |
| 0x21 | Select Unicode Code Range 0x2100-0x21FF |
| 0x22 | Select Unicode Code Range 0x2200-0x22FF |
| 0x23 | Select Unicode Code Range 0x2300-0x23FF |
| 0x24 | Select Unicode Code Range 0x2400-0x24FF |
| 0x25 | Select Unicode Code Range 0x2500-0x25FF |
| 0x26 | Select Unicode Code Range 0x2600-0x26FF |
| 0x27 | Select Unicode Code Range 0x2700-0x27FF |
| 0x28-0x2F | Reserved |
| 0x30 | Select Unicode Code Range 0x3000-0x30FF |
| 0x31 | Select Unicode Code Range 0x3100-0x31FF |
| 0x32 | Select Unicode Code Range 0x3200-0x32FF |
| 0x33 | Select Unicode Code Range 0x3300-0x33FF |
| 0x34-0x3D | Reserved |
| 0x3E | Select Standard Compression Scheme for Unicode(SCSU)[19] |
| 0x3F | Select Unicode，UTF-16Form |
| 0x40-0x41 | Assigned to ATSC standard for Taiwan |
| 0x42-0x47 | Reserved for future ATSC use |
| 0x48 | Assigned to ATSC standard for South Korea |
| 0x49-0xDF | Reserved for future ATSC use |
| 0xE0-0xFE | Used in other systems |
| 0xFF | Not applicable |
Table 4
For example, a Unicode encoded radio is the sequence of " 0x0E50; 0x0E51; 0x0E52 ", may represent with one " joint ": its mode value is " 0x0E ", and the character string byte in its joint is " 0x50,0x51; 0x52 ", therefore utilizes mode that a simple coding delivery form can be provided for 16 Unicode encoded radio.
Standard Compression Scheme for Unicode (SCSU) coded system is selected in mode value " 0x3E " expression for use.
Mode value " 0x3F " expression is used the UTF-16 compiling method and is represented character.About the specific definition of UTF-16, see also the Unicode standard.If use mode value " 0x3F ", the UTF-16 code value that 16 Unicode value is formed should be encoded into the value of uimsbf form.
The character string that is not included among the mode " 0x00 " preferably adopts the mode value to be " 0x3E " (recommendation) or " 0x3F " (optional), and the byte number that uses which kind of mode to obtain is few, then uses this kind mode.
6) number_of_byte: be the uimsbf data of a 8bit, be used to identify the byte number of this keyword.K the byte that represents j segment in the circulation below with k.
7) compressed_keyword_byte[k]: the k byte of representing the j joint, this space should occupy the integer-bit of a byte, if necessary can polishing to meet the requirements, these data should be write according to the requirement of described mode and compression type.
Provide the example of a concrete incident antistop list below according to the grammer in above-mentioned incident antistop list stage casing, as shown in Figure 3.
In the section of this example, the content in first row can be described as gauge outfit, and the content in the described gauge outfit comprises (its value repeats no more in this example for the parameter of fixed value in above-mentioned grammer):
1) identify the table_id that this section belongs to the incident antistop list: can value be 0xDB,
2) identify the source_id that this section program is originated, suppose that its value is 5,
3) identify the version_number of this section version number, be assumed to be 3,
4) identify the section_number of this section segment number, suppose that its value is 6,
5) identify the segment number last_section_number of this incident antistop list final stage, suppose that its value is 60,
6) identify the protocol_version of this table protocol version, in the also unmodified mistake of this hypothesis, so the protocol_version value is 0, later every change once, its value adds 1, and 7) identify the number n um_events_in_section of the described incident of this section, in this example, suppose to have described in this section 8 incidents, so its value is 8.
Source_id in the foregoing is a part of content in the VCT table, combines with event_id in the following keyword and promptly can uniquely determine an incident, and this is one of step when setting up the incident antistop list.
Content description after the gauge outfit relation of incident and keyword.Suppose that 8 event_id values in this section are from 25 to 32, wherein the incident of event_id value 25 correspondences is films " Roman Holiday " of playing the 16:20～17:50 period at certain channel, and then can select its keyword when setting up the incident antistop list is Roman Holiday, Ao Daili. He Ben, Pascal Greggory. and Parker, Audrey.Hepburn, Gregory.Peck, RomanHoliday, Rome etc.In addition described keyword can, can also be director's name, film studio or the like the keyword relevant with this film for movie name, the keyword that extracts from movie name, featured performer title, and the corresponding keyword of other languages.The back gives two examples, it is the available keyword of incident _ id value 26 pairing " Animal World " and incident _ id value 32 pairing " travel of film " program, wherein " travel of film " program has been introduced the film performer---the life of Audrey.Hepburn and her masterpiece, so its keyword Ke Yi is Ao Daili. and He Ben, Roman Holiday, lovely lady, Audrey.Hepburn, Gregory.Peck etc.
About keyword specifically is how to carry out content encoded can will not describe in detail at this referring to the regulation of the PSIP agreement in the ATSC standard to multiple string structure coding.
After having determined the keyword of certain incident, as long as the regulation of section and multiple string is tabulated according to above-mentioned PSIP agreement.
Specify the method for carrying out program searching below in conjunction with Fig. 4.
A) set up the incident antistop list;
What set up the incident antistop list can be the provider of electronic program guide information, provider finds out associative key according to the relevant information of incident, list in the table, described incident antistop list is the same with other table in the electronic program guide information, the also section of being divided into transmission in TS stream, after being transferred to the TV set-top box of user terminal, can be stored in the memory in the set-top box, after, if the content of electronic program guide information changes, then can refresh the described electronic program guide information that stores; What set up the incident antistop list can be the TV set-top box of user terminal also, and after receiving electronic program guide information, set-top box can be analyzed it, sets up the incident antistop list according to certain standard, uses for user search.
B) user imports search key one;
The user can import search key when searching TV programme, keyword can be programm name, performer's name etc., and explanation is arranged in the example in the above, does not repeat them here.
C) plurality of keywords two identical or close with described keyword one found out in the keyword in more described keyword one and the described incident antistop list in the incident antistop list, and further obtain the event number of described keyword two correspondences;
In the example explanation is arranged in the above, do not repeat them here.
D) find out described event number indication some incidents relevant information and show.
After finding event number, can from the EIT table, find about information such as event name, reproduction times, and can further find the detailed character introduction of incident from the ETM table, also can look for its channel information-source_id in the gauge outfit from EKT in addition, therefore can further from the VCT table, find information, comprise channel name etc. about channel.Find on video screen, to show after the described information and check, with the program of selecting to watch certain program or pre-recording to like for the user.
When the user search program, can be by the remote controller input search key of set-top box, as " Roman Holiday ", then this keyword is stored, and is designated as keyword one.Set-top box can be found out the incident antistop list in the electronic program guide information under the described preservation then, perhaps from the electronic program guide information that the TS flow transmission is come, leach the incident antistop list, and search whole event antistop list, find out the keyword two that all are complementary with " Roman Holiday ", in this example, can find out event_id in this section at least is two programs of 25 and 32.If the user imports " He Ben ", then also can in electronic program guide information, find at least two results, promptly incident _ the id in this section is two programs of 25 and 32.
Keyword for user's input, generally can make it comparatively standard through preliminary treatment, as the unified capital and small letter (branch that capital and small letter is arranged as letter in English, perhaps the numeral in the Chinese has the branch of capital and small letter, then can unify capital and small letter earlier, search for again), remove wherein symbol (as the space, make it become independent word one by one), remove wherein insignificant content (as in the Chinese " ", " a " in the English, words such as " the "), perhaps only utilize the root of word to retrieve and (search for as from " graceful " of user's input, extracting " grace ", then also can obtain " grace ", the content of word correspondences such as " gracefully ", also can carry out logical combination and make it to be more conducive to search a plurality of keywords.
The corresponding event_id and the source_id in the above-mentioned gauge outfit that find according to above-mentioned keyword can find corresponding event title and description in the EIT table, also can in the VCT table, find corresponding channel title, channel to describe, be presented on the video screen and check for the user, the user can select wherein certain program to watch, perhaps the pre-recording program.
The definition of above-described incident antistop list method for building up, list structure and keyword all provides according to relevant regulations in the ATSC standard, for the DVB standard, can correspondingly make change according to its regulation, to obtain being applicable to the incident antistop list and the key definition of DVB standard to the SI table.
Below simple a kind of program searching engine based on electronic program guide information described, be used for according to the whole electronic program guide informations of keyword search of user's input or the incident antistop list of searching epg information only, to obtain Search Results.
Each parts described below, operated by rotary motion is in set-top box.
Transmission demodulation multiplexer module grasps transport stream and peels off the TS head, then use pid filter with identification PSIP (performance system information protocol) form for the ATSC standard, for the DVB standard then is SI (system information) form, and those forms are loaded as Installed System Memory, upgrade its programme information related register then.
User's key assignments in the keyword, the user wants to search in all channels, by Long-distance Control (set-top-box system), perhaps keyboard (desktop system) is imported a keyword, microprocessor can send a search command, by writing the PSE register-file keyword is delivered to program searching engine (PSE) then.
Program searching engine (PSE) is PSIP or the SI form in the search system internal memory then, finds the incident antistop list, according to the keyword retrieval incident.For the ATSC system, PSE probably will be by the method decoding Word message of Huffman form, and PSE will mate at keyword with from the information that internal memory searches.If coincide, it will the update event information register, and the notice microprocessor is searched for successfully.
Program searching engine can be the hardware module among the Digital Television ASIC, and it has and microprocessor, the interface that Memory Controller Hub is connected with the transmission demodulation multiplexer, and perhaps it may be a software function or program, to carry out and the hardware module identical functions.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1, a kind of method for building up of realizing the tables of data of television program search is used for carrying out television program search at electronic program guide information, comprises the information of describing channel and incident in the described electronic program guide information, it is characterized in that,
Extracting in electronic program guide information can unique information of determining described incident;
According to the keyword of electronic program guide information formulation corresponding to described incident, described keyword is used to describe the feature of corresponding incident;
According in the digital television standard incident antistop list that is used for expression incident and keyword relation being set up in the respective specified grammer of electronic program guide information table, described incident antistop list is supplied with for electronic program guide information provider or is set up after to the electronic program guide information analysis of receiving by the TV set-top box of user terminal, each section is according to constructing the grammer of section regulation in the ATSC standard P Session Initiation Protocol in the described incident antistop list, and described keyword root is constructed according to the definition to many character strings in the PSIP agreement.
2, method according to claim 1 is characterized in that, the corresponding a plurality of keywords of a described incident.
3, method according to claim 1 is characterized in that, the coding of described keyword adopts the multilingual coding.
4, a kind of method that realizes television program search is used for carrying out television program search at electronic program guide information, it is characterized by, and may further comprise the steps:
A) set up the incident antistop list;
B) TV user input search key one;
C) plurality of keywords two identical or close with described keyword one found out in the keyword in more described keyword one and the described incident antistop list in the incident antistop list, and further obtain the event number of described keyword two correspondences;
D) find out described event number indication some incidents relevant information and show.
5, method according to claim 4 is characterized in that, in step a), sets up the incident antistop list by electronic program guide information provider, and described incident antistop list is delivered to user terminal together with other table in the electronic program guide information.
6, method according to claim 5 is characterized in that, under user terminal is preserved described electronic program guide information in step a); Then filter out the incident antistop list in the electronic program guide information under the described preservation in step c), the keyword that utilizes the user to import in described incident antistop list is retrieved.
7, method according to claim 5, it is characterized in that, filter out the incident antistop list in the electronic program guide information in the described transport stream that is sent to the TV user terminal in step c), the keyword that utilizes the user to import in described incident antistop list is retrieved.
8, method according to claim 4 is characterized in that, user terminal receives electronic program guide information, and program-related information is wherein analyzed, and sets up the incident antistop list and uses for user search.
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| CNB2005101374440A CN100493176C (en) | 2005-12-30 | 2005-12-30 | Establishing method and searching method for realizing datalist of television program search |
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| CNB2005101374440A CN100493176C (en) | 2005-12-30 | 2005-12-30 | Establishing method and searching method for realizing datalist of television program search |
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| CN101888504A (en) * | 2010-06-12 | 2010-11-17 | 广州鼎宇电子科技有限公司 | Method for retrieving text information of digital television |
| CN104811788A (en) * | 2015-04-29 | 2015-07-29 | 浪潮软件集团有限公司 | Efficient real-time searching method for live television programs |
| CN105812897B (en) | 2016-03-22 | 2019-03-08 | 华为技术有限公司 | A kind of program control method for playing back and digital television devices |
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