CN102098570B - Digital television information playing method and system - Google Patents

Digital television information playing method and system Download PDF

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Publication number
CN102098570B
CN102098570B CN 201110043361 CN201110043361A CN102098570B CN 102098570 B CN102098570 B CN 102098570B CN 201110043361 CN201110043361 CN 201110043361 CN 201110043361 A CN201110043361 A CN 201110043361A CN 102098570 B CN102098570 B CN 102098570B
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related information
information
descriptor
programming events
digital television
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CN102098570A (en
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吴不
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Shenzhen Skyworth Digital Technology Co Ltd
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Shenzhen Skyworth Digital Technology Co Ltd
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Abstract

The embodiment of the invention discloses a digital television information playing method and system. The method comprises the following steps of: locking a main channel point in a digital television network and demodulating to obtain a base band transport stream, and acquiring an event information table and a relevant information descriptor in the base band transport stream; analyzing the event information table and the relevant information descriptor, and acquiring all relevant information in the relevant information descriptor; judging whether all the relevant information is relevant to current program events or not according to the type of all the relevant information or keywords; and playing the relevant information relevant to the current program events. The digital television information playing method and system provided by the embodiment of the invention have the advantages of enabling various information to be accurately relevant to program events of same type and ensuring that the information presented on a television is consistent with the currently watched program type, thereby having more pertinence, being easy to be accepted by users and improving the information popularizing effect.

Description

A kind of digital television information playing method and system
Technical field
The present invention relates to digital TV field, relate in particular to a kind of digital television information playing method and system.
Background technology
Business to the accurate pushed information of user is very rapid in the internet arena development at present, this business Main Basis carries out the Extraordinary depth analysis to user's internet behavior, draw user's focus, thereby carry out information pushing targetedly, this business will improve the information produce an effect undoubtedly.And this business is transplanted to digital TV field, and will be operator's another new developing in value-added service, can bring new profit growth point.
And at digital TV field, the propelling movement of its information be by information issuing system by the reception display part of integrated this system in the software of set-top box, with the information distributing system of digital television front equipment carry out adaptive, final demonstration information on set-top box.Because in set-top box being mainly shows these information on TV programme or menu, the type of information is not limited to word, picture, video, audio frequency etc.
But the present invention finds in the process of implementing, there is open defect in existing information pushing mode: although existing information distributing system can be changed the information content to display easily by headend equipment, and these contents can with the current channel association of seeing of user, make each channel show or play corresponding information, but because the type of each program of a channel broadcast is also different, so come related information pushing mode still not accurate enough according to channel.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of digital television information playing method and system are provided, can be accurately that various information are identical with classification programming events is associated, when the user watches certain programming events of certain channel, set-top box is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of digital television information playing method, comprising:
Dominant frequency point in the locking digital TV network and demodulation obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
Resolve described Event Information Table and related information descriptor, obtain each related information in described related information descriptor; And judge that according to the type of described each related information or keyword whether described each related information is associated with current programming events;
Play the related information that is associated with described current programming events.
Wherein, if described Event Information Table is supported the classification of programming events, described related information descriptor comprises the type of related information; What the type of described related information was headend equipment according to this related information is content-defined.
Wherein, the described Event Information Table of described parsing and related information descriptor obtain each related information in described related information descriptor; And judge according to described each related information descriptor whether the type of described each related information is related with current programming events, comprising:
Resolve described Event Information Table, obtain the type of current programming events; What the type of described programming events was headend equipment according to this programming events is content-defined;
Resolve described related information descriptor, obtain the type of each related information in described related information descriptor;
Whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; If consistent, judge that this related information is associated with current programming events.
Wherein, described headend equipment is consistent with the criteria for classification of each related information in the related information descriptor to the criteria for classification of each programming events in Event Information Table.
Wherein, the type of described programming events is represented by the content descriptors of the Event Information Table in Program Specific Information PSI/ business information SI standard.
Wherein, described criteria for classification comprises: one-level classification, secondary classification and User Defined classification.
Wherein, if described Event Information Table is not supported the classification of programming events, described related information descriptor comprises the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
Wherein, the described Event Information Table of described parsing and related information descriptor obtain each related information in described related information descriptor; And judge that according to the keyword of described each related information whether described each related information is associated with current programming events, comprising:
Resolve described Event Information Table, obtain the title of current programming events;
Resolve described related information descriptor, obtain the keyword of each related information in described related information descriptor; What the keyword of described related information was headend equipment according to this related information is content-defined;
Judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, judge that this related information is associated with current programming events.
Wherein, described related information descriptor comprises: the package identification that each related information is corresponding, sequence number, type or keyword, play rules.
Wherein, this related information of described judgement is with after current programming events is associated, play with related information that described current programming events is associated before, also comprise;
Obtain the package identification corresponding with the related information that is associated of current programming events;
According to described package identification, obtain the corresponding data bag in baseband transmission stream.
Wherein, described related information descriptor is inserted in the self-defining table of BAT bouquet association table, SDT Service Description Table or headend equipment in PSI/ SI standard.
Correspondingly, the embodiment of the present invention also provides the digital television information Play System, comprising: headend equipment and receiving terminal for digital television;
Described headend equipment is used for the content according to each related information, package identification, sequence number, type or keyword, the play rules of each related information of definition in the related information descriptor; And described related information descriptor and Event Information Table are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; Resolve described Event Information Table and related information descriptor, obtain the related information descriptor of each related information; And judge one by one according to type or the keyword of described related information whether each related information is associated with described current programming events; And the related information that broadcast is associated with described current programming events.
Wherein, if described Event Information Table is supported the classification of programming events, described related information descriptor comprises the type of related information; What the type of described related information was headend equipment according to this related information is content-defined.
Wherein, described headend equipment is used for the content according to each programming events, the type of each programming events of definition in Event Information Table; According to the content of each related information, package identification, sequence number, type, the play rules of each related information of definition in the related information descriptor; And described related information descriptor and Event Information Table are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; And resolve described Event Information Table and related information descriptor, obtain the type of current programming events and the type of each related information; And whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; Play its type related information consistent with the type of described current programming events.
Wherein, described headend equipment is consistent with the criteria for classification of each related information in the related information descriptor to the criteria for classification of each programming events in Event Information Table.
Wherein, the type of described programming events is represented by the content descriptors of the Event Information Table in Program Specific Information PSI/ business information SI standard.
Wherein, described criteria for classification comprises: one-level classification, secondary classification and User Defined classification.
Wherein, described receiving terminal for digital television comprises: the frequency locking demodulation module, and the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
The first comparing module is used for resolving described Event Information Table and related information descriptor, obtains the type of current programming events and the type of each related information; And whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; If consistent, judge that this related information is associated with current programming events;
The information playing module is used for playing the related information that is associated with described current programming events.
Wherein, if described Event Information Table is not supported the classification of programming events, described related information descriptor is described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
Wherein, described headend equipment is used for the content according to each related information, the keyword of each related information of definition in the related information descriptor; And described Event Information Table and related information descriptor are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; And resolve described Event Information Table and related information descriptor, obtain the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, play this related information.
Wherein, described receiving terminal for digital television comprises:
The frequency locking demodulation module, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
The second comparing module is used for resolving described Event Information Table and related information descriptor, obtains the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, judge that this related information is associated with current programming events;
The information playing module is used for playing the related information that is associated with described current programming events.
Wherein, described related information descriptor is inserted in the self-defining table of BAT bouquet association table, SDT Service Description Table or headend equipment in PSI/ SI standard.
Wherein, described information playing module comprises:
The sign acquiring unit is used for according to described related information descriptor, obtains package identification corresponding to related information that described the first comparing module or the second comparing module and current programming events are associated;
The packet acquiring unit for the package identification that obtains according to described sign acquiring unit, obtains the corresponding data bag in baseband transmission stream;
Information playing unit is used for resolving the packet that described packet acquiring unit obtains, and plays according to play rules corresponding in described related information descriptor.
Wherein, described receiving terminal for digital television is set-top box or digital TV integrated machine.
Implement digital television information playing method provided by the invention and system, can be accurately that various information are identical with classification programming events is associated, when the user watches certain programming events of certain channel, set-top box is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is digital television information playing method the first embodiment schematic flow sheet provided by the invention;
Fig. 2 is digital television information playing method the second embodiment schematic flow sheet provided by the invention;
Fig. 3 is digital television information playing method the 3rd embodiment schematic flow sheet provided by the invention;
Fig. 4 is digital television information Play System the first example structure schematic diagram provided by the invention;
Fig. 5 is digital television information Play System the second example structure schematic diagram provided by the invention;
Fig. 6 is digital television information playing method the 3rd example structure schematic diagram provided by the invention;
Fig. 7 is information playing module structural representation provided by the invention.
Embodiment
Digital television information playing method provided by the invention and system, can be accurately that various information are identical with classification programming events is associated, when the user watches certain programming events of certain channel, set-top box is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Referring to Fig. 1, be digital television information playing method the first embodiment schematic flow sheet provided by the invention, as shown in Figure 1:
At step S100, the dominant frequency point in the locking digital TV network and demodulation obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.
At step S101, resolve described Event Information Table and related information descriptor, obtain each related information in described related information descriptor.
At step S102, judge that according to the type of described each related information or keyword whether described each related information is associated with current programming events.
At step S104, play the related information that is associated with described current programming events.
Implement digital television information playing method provided by the invention, can be accurately that various related informations are identical with classification programming events is associated, when the user watches certain programming events of certain channel, receiving terminal for digital television is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Referring to Fig. 2, be digital television information playing method the second embodiment schematic flow sheet provided by the invention, in the present embodiment, with the flow process of more detailed this digital television information playing method of description.As shown in Figure 2:
At step S200, the headend equipment of digital TV network defines the type of each programming events according to the content of each programming events in Event Information Table.
More specifically, type for programming events, in the present embodiment can be by Program Specific Information (PSI, the content descriptors (content_descriptor) of the Event Information Table in Program Specific Information)/business information (SI, Service Information) standard represents.
In the PSI/SI standard, Event Information Table provides the information of the programming events that each channel comprises in chronological order.The content descriptors (content_descriptor) that can insert in this table by the PSI/SI standard definition provides clearly information description for event, namely each programming events of describing is classified, each programming events be can be respectively and one-level classification and secondary classification carried out, each classification is 4 bit fields, just can define 16 large classes at most like this, 256 groups are if can also by the maximum two layers of classification of User Defined, can satisfy the classificating requirement of various programming events fully not.
At step S201, headend equipment defines the type of each related information according to the content of each related information in the related information descriptor.Further, headend equipment is consistent with the criteria for classification of each programming events in Event Information Table to the criteria for classification of each related information in the related information descriptor, can be also multiclass classification, for example comprises: one-level classification, secondary classification and User Defined classification.
More specifically, in the present embodiment, the related information descriptor comprises: the package identification that each related information is corresponding, sequence number, type or keyword, play rules; The type of described related information is represented by the related information descriptor in described related information descriptor.
In embodiments of the present invention, can carry out as giving a definition the related information descriptor:
Associated?Information?Descriptor（）{
Descriptor_tag // 8bit may be defined as 0x8A herein
Descriptor_length // 8bit, descriptor length
Content_nibble_level_1 // 4bit, the classification of event one-level
Content_nibble_level_2 // 4bit, the event secondary classification
User_nibble_1 // 4bit, the User Defined classification 1 of event
User_nibble_2 // 4bit, the User Defined classification 2 of event
Info_PID // 8bit, the Packet Identifier of information data
Info_index // 8bit, the sequence number of information data
Info_type // 8bit, the type of information data
Info_duration_time // 32bit, the information displaying time
Info_x // 16bit is presented at the x coordinate on screen
Info_y // 16bit is presented at the y coordinate on screen
Info_width // 16bit is presented at the width on screen
Info_height // 16bit is presented at the height on screen
}
Each explanation of field that adopts in above-mentioned related information descriptor is as follows:
Descriptor_tag: descriptor tag, 8 bit fields may be defined as 0x8A(in " digital video broadcasting Chinese business information standard " the inside at this, provide 0x80-0xFE and are the private setting descriptor label of user's self-defining).
Descriptor_length: descriptor length, 8 bit fields are used for describing this byte length of descriptor afterwards.
Content_nibble_level_1: the classification of event one-level, 4 bit fields are classified corresponding to the one-level in content descriptors.Wherein 0x0 represents film/drama, and 0x2 represents news and current affairs, 0x3 representative performance/match, and 0x4 represents physical culture etc., the specific coding mode is referring to " digital video broadcasting Chinese business information standard ".
Content_nibble_level_2: the event secondary classification, 4 bit fields are corresponding to the secondary classification in content descriptors.When the content_nibble_level_1 value is 0x1, this value represents film/drama (common) for 0x0,0x1 represents detective/horror film, 0x2 represents adventure movie/Western/war film etc., when the content_nibble_level_1 value is 0x2, this value represents news and current affairs (common) for 0x0, and 0x1 represents news/weather forecast etc., and the specific coding mode is referring to " digital video broadcasting Chinese business information standard ".
User_nibble_1: User Defined classification Isosorbide-5-Nitrae bit field, corresponding to the self-defined classification 1 of the user's programme content in content descriptors.Be defaulted as 0x0, be invalid value.
User_nibble_2: User Defined classification 2,4 bit fields, corresponding to the self-defined classification 2 of the user's programme content in content descriptors.Be defaulted as 0x0, be invalid value.
Info_PID: the Packet Identifier of information data (Packet Identifier, PID), 8 bit fields.Identical with the pid value of real data in Program Map Table.
Info_index: the sequence number of information data, 8 bit fields, this field is different from info_PID, is used for the DISPLAY ORDER of descriptor data.Acquiescence is since 1 counting.
Info_type: the type of information data, 8 bit fields, its value is invalid for 0x0 represents, and 0x1 represents video data, and 0x2 represents voice data, 0x3 representative picture data, 0x4 represents lteral data, other are worth reservation, expand waiting.
Info_duration_time: the information displaying time, 32 bit fields are used for the time that descriptor continues demonstration, and unit is second.
Info_x: information is specified the x coordinate that is presented on screen, 16 bit fields, and unit is pixel.
Info_y: information is specified the y coordinate that is presented on screen, 16 bit fields, and unit is pixel.
Info_width: information is specified the width that is presented on screen, 16 bit fields, and unit is pixel.
Info_height: information is specified the height that is presented on screen, 16 bit fields, and unit is pixel.
Based on above-mentioned related information descriptor, need to revise the information distributing system of digital TV network headend equipment, increase above-mentioned taxonomic structure, add simultaneously this related information descriptor in PSI/SI.
Preferably, the present embodiment can be added the related information descriptor in the information table of original information distributing system definition, the specific definition of this information table is different according to the difference of information distributing system, can be in the PSI/SI standard, SDT Service Description Table, can be also the table that headend equipment redefines as required.
Further, step S200 and step S201 can carry out simultaneously.
At step S202, headend equipment flows to the PSI/SI of Event Information Table and related information descriptor into multiplexer together with other program baseband transmission multiplexing, then with the code stream after multiplexing through modulating unit, transmit on digital TV network.
At step S203, receiving terminal for digital television receive the user by remote controller send change the platform instruction after, dominant frequency point in the locking digital TV network and demodulation obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.In the present embodiment, described receiving terminal for digital television can be digital TV set-top box or Digital Television and set-top box integrated machine.
At step S204, receiving terminal for digital television is resolved described Event Information Table, obtains the type of current programming events.More specifically, receiving terminal for digital television is resolved Event Information Table, obtains the title of current programming events, and time started and duration, resolve simultaneously content descriptors and get one-level classification, the secondary classification of this programming events, if there is the User Defined classification also will obtain.
At step S205, receiving terminal for digital television is resolved described related information descriptor, obtains the type of each related information in described related information descriptor.
At step S206, receiving terminal for digital television judges one by one whether the type of each related information in described related information descriptor is consistent with the type of described current programming events.More specifically, when the type of receiving terminal for digital television judgement related information was consistent with the type of current programming events, the multiclass classification that must guarantee both was all identical consistent.When the type that is determined with related information when receiving terminal for digital television is consistent with the type of current programming events, execution in step S207; Otherwise, ignore this related information, continue to judge whether next related information is consistent with the type of current programming events, until all related informations in the related information descriptor are all completed judgement.
At step S207, receiving terminal for digital television obtains its type package identification corresponding to related information consistent with the type of current programming events in the related information descriptor; And according to described package identification, obtain the corresponding data bag in baseband transmission stream.
At step S208, receiving terminal for digital television is resolved described packet, and plays according to play rules corresponding in described related information descriptor.Described play rules refers in the related information descriptor type by the information data of field info_type indication; The information displaying time of info_duration_time indication; Info_x: the information of indication is presented at the x coordinate on screen; The information of info_y indication is presented at the y coordinate on screen; The information of info_width indication is presented at width indication on screen; The information of info_height indication is specified the height that is presented on screen.
Preferably, if current programming events has a plurality of types identical related information with it, receiving terminal for digital television according to each related information corresponding sequence number in the related information descriptor, is play related information in order.
Implement digital television information playing method provided by the invention, by programming events and related information are classified according to identical criteria for classification, can be accurately that various related informations are identical with type programming events is associated.When the user watches certain programming events of certain channel, receiving terminal for digital television is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Referring to Fig. 3, be digital television information playing method the 3rd embodiment schematic flow sheet provided by the invention, be with the difference of a upper embodiment, in the present embodiment, described related information descriptor is described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.In the present embodiment, will be with the title of programming events and the keyword foundation that whether both are associated as judgement of related information, if do not add content descriptors in Event Information Table with the reply headend equipment, or digital TV network is not supported the situation of programming events classification.This digital television information playing method is as shown in Figure 3:
At step S300, headend equipment defines the keyword of each related information according to the content of each related information in the related information descriptor.
More specifically, in the present embodiment, the related information descriptor comprises: the package identification that each related information is corresponding, sequence number, type or keyword, play rules; Described related information descriptor is mainly described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
In embodiments of the present invention, can carry out as giving a definition the related information descriptor:
Associated?Information?Descriptor（）{
Descriptor_tag // 8bit may be defined as 0x8A herein
Descriptor_length // 8bit, descriptor length
Key_word_length // 8bit, key length
Key_word _ data () // keyword content
Info_PID // 8bit, the Packet Identifier of information data
Info_index // 8bit, the sequence number of information data
Info_type // 8bit, the type of information data
Info_duration_time // 32bit, the information displaying time
Info_x // 16bit is presented at the x coordinate on screen
Info_y // 16bit is presented at the y coordinate on screen
Info_width // 16bit is presented at the width on screen
Info_height // 16bit is presented at the height on screen
}
To comparing in above-mentioned related information descriptor with in the second embodiment, have the explanation of field of change as follows:
Key_word_length: key length, 8 bit fields.Be used for describing the length of ensuing key data, maximum is 255 bytes.Key_word _ data (): the keyword content, support Chinese, English, digital, conventional sign.Content-length equals the length of key_word_length.Consistent in the effect of other field and the second embodiment.
Headend equipment adds this related information descriptor in PSI/SI.
Preferably, the present embodiment can be added the related information descriptor in the information table of original information distributing system definition, the specific definition of this information table table is different according to the difference of information distributing system, can be BAT bouquet association table, the SDT Service Description Table in the PSI/SI standard, can be also the table that headend equipment redefines as required.
At step S301, headend equipment is multiplexing with flowing to into multiplexer together with other program baseband transmission of Event Information Table and related information descriptor, then with the process of the code stream after multiplexing modulating unit, transmits on digital TV network.
At step S302, receiving terminal for digital television receive the user by remote controller send change the platform instruction after, dominant frequency point in the locking digital TV network and demodulation obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.In the present embodiment, described receiving terminal for digital television can be digital TV set-top box or digital TV integrated machine.
At step S303, receiving terminal for digital television is resolved described Event Information Table, obtains the title of current programming events.More specifically, receiving terminal for digital television is resolved Event Information Table, obtains the title of current programming events, and time started and duration.
At step S304, receiving terminal for digital television is resolved described related information descriptor, obtains the keyword of each related information in described related information descriptor.
At step S305, receiving terminal for digital television judges one by one whether the keyword of each related information in described related information descriptor is comprised by the title of current programming events.That is, whether the title of current programming events has comprised the keyword of each related information.When the keyword that is determined with related information when receiving terminal for digital television is comprised by the title of current programming events, judge that this related information is the information that is associated with current programming events, execution in step S306; Otherwise, ignore this related information, continue to judge whether the keyword of next related information is comprised by the title of current programming events, until all related informations in the related information descriptor are all completed judgement.
At step S306, receiving terminal for digital television obtains its keyword by package identification corresponding to the related information that title comprised of current programming events in the related information descriptor; And according to described package identification, obtain the corresponding data bag in baseband transmission stream.
At step S307, receiving terminal for digital television is resolved described packet, and plays according to play rules corresponding in described related information descriptor.Preferably, if current programming events has a plurality of types identical related information with it, receiving terminal for digital television according to each related information corresponding sequence number in the related information descriptor, is play related information in order.
Implement digital television information playing method provided by the invention, by programming events and related information are classified according to identical criteria for classification, can be accurately that various related informations are identical with type programming events is associated.When the user watches certain programming events of certain channel, receiving terminal for digital television is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Referring to Fig. 4, be digital television information Play System the first example structure schematic diagram provided by the invention, as shown in Figure 4, this system comprises: headend equipment 1 and receiving terminal for digital television 2;
Described headend equipment 1 is used for the content according to each related information, the related information descriptor of each related information of definition in the related information descriptor; And described related information descriptor is added in baseband transmission stream, transmit on digital TV network.
Described receiving terminal for digital television 2, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; Resolve described Event Information Table and related information descriptor, obtain the related information descriptor of each related information; And judge one by one according to described related information descriptor whether each related information is associated with described current programming events; And the related information that broadcast is associated with described current programming events.
When receiving terminal for digital television 2 was set-top box, it play related information by the Digital Television that is attached thereto; When receiving terminal for digital television 2 was Digital Television and set-top box integrated machine, its video module by self was play related information.
Implement digital television information Play System provided by the invention, can be accurately that various related informations are identical with classification programming events is associated, when the user watches certain programming events of certain channel, receiving terminal for digital television is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Referring to Fig. 5, be digital television information Play System the second example structure schematic diagram provided by the invention, in the present embodiment, with the structure of this digital television information Play System of more detailed description.As shown in Figure 4, this system comprises equally: headend equipment 1 and receiving terminal for digital television 2;
Described headend equipment 1 is used for the content according to each related information, the related information descriptor of each related information of definition in the related information descriptor; And described related information descriptor is added in baseband transmission stream, transmit on digital TV network.
Described receiving terminal for digital television 2, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; Resolve described Event Information Table and related information descriptor, obtain the related information descriptor of each related information; And judge one by one according to described related information descriptor whether each related information is associated with described current programming events; And the related information that broadcast is associated with described current programming events.
More specifically, in embodiments of the present invention, described related information descriptor is used for the type of expression related information; What the type of described related information was headend equipment according to this related information is content-defined.
Headend equipment 1 is used for the content according to each programming events, the type of each programming events of definition in Event Information Table; According to the content of each related information, package identification, sequence number, type or keyword, the play rules of each related information of definition in the related information descriptor; And described related information descriptor is inserted in table in PSI/ SI standard, add in baseband transmission stream together with Event Information Table, transmit on digital TV network.
Receiving terminal for digital television 2, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; And resolve described Event Information Table and related information descriptor, obtain the type of current programming events and the type of each related information; And whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; Play its type related information consistent with the type of described current programming events.
More specifically, described headend equipment is consistent with the criteria for classification of each related information in the related information descriptor to the criteria for classification of each programming events in Event Information Table, this criteria for classification can be multiclass classification, for example comprises: one-level classification, secondary classification and User Defined classification.
The type of headend equipment 1 each programming events of definition is the content according to each programming events.Type for programming events, headend equipment 1 can be at Program Specific Information (PSI in the present embodiment, the content descriptors (content_descriptor) of the Event Information Table in Program Specific Information)/business information (SI, Service Information) standard represents.
In the PSI/SI standard, Event Information Table provides the information of the programming events that each channel comprises in chronological order.The content descriptors (content_descriptor) that can insert in this table by the PSI/SI standard definition provides clearly information description for event, namely each programming events of describing is classified, each programming events be can be respectively and one-level classification and secondary classification carried out, each classification is 4 bit fields, just can define 16 large classes at most like this, 256 groups are if can also by the maximum two layers of classification of User Defined, can satisfy the classificating requirement of various programming events fully not.
Simultaneously, in 1 pair of related information descriptor of headend equipment, the criteria for classification of each related information is consistent with the criteria for classification of each programming events in Event Information Table, can be also multiclass classification, for example comprises: one-level classification, secondary classification and User Defined classification.
More specifically, in the present embodiment, the related information table comprises: the package identification that each related information is corresponding, sequence number and related information descriptor; The type of described related information is represented by the related information descriptor in described related information table.In embodiments of the present invention, can carry out as giving a definition the related information descriptor:
Associated?Information?Descriptor（）{
Descriptor_tag // 8bit may be defined as 0x8A herein
Descriptor_length // 8bit, descriptor length
Content_nibble_level_1 // 4bit, the classification of event one-level
Content_nibble_level_2 // 4bit, the event secondary classification
User_nibble_1 // 4bit, the User Defined classification 1 of event
User_nibble_2 // 4bit, the User Defined classification 2 of event
Info_PID // 8bit, the Packet Identifier of information data
Info_index // 8bit, the sequence number of information data
Info_type // 8bit, the type of information data
Info_duration_time // 32bit, the information displaying time
Info_x // 16bit is presented at the x coordinate on screen
Info_y // 16bit is presented at the y coordinate on screen
Info_width // 16bit is presented at the width on screen
Info_height // 16bit is presented at the height on screen
}
Each explanation of field that adopts in above-mentioned related information descriptor is as follows:
Descriptor_tag: descriptor tag, 8 bit fields may be defined as 0x8A(in " digital video broadcasting Chinese business information standard " the inside at this, provide 0x80-0xFE and are the private setting descriptor label of user's self-defining).
Descriptor_length: descriptor length, 8 bit fields are used for describing this byte length of descriptor afterwards.
Content_nibble_level_1: the classification of event one-level, 4 bit fields are classified corresponding to the one-level in content descriptors.Wherein 0x0 represents film/drama, and 0x2 represents news and current affairs, 0x3 representative performance/match, and 0x4 represents physical culture etc., the specific coding mode is referring to " digital video broadcasting Chinese business information standard ".
Content_nibble_level_2: the event secondary classification, 4 bit fields are corresponding to the secondary classification in content descriptors.When the content_nibble_level_1 value is 0x1, this value represents film/drama (common) for 0x0,0x1 represents detective/horror film, 0x2 represents adventure movie/Western/war film etc., when the content_nibble_level_1 value is 0x2, this value represents news and current affairs (common) for 0x0, and 0x1 represents news/weather forecast etc., and the specific coding mode is referring to " digital video broadcasting Chinese business information standard ".
User_nibble_1: User Defined classification Isosorbide-5-Nitrae bit field, corresponding to the self-defined classification 1 of the user's programme content in content descriptors.Be defaulted as 0x0, be invalid value.
User_nibble_2: User Defined classification 2,4 bit fields, corresponding to the self-defined classification 2 of the user's programme content in content descriptors.Be defaulted as 0x0, be invalid value.
Info_PID: the Packet Identifier of information data (Packet Identifier, PID), 8 bit fields.Identical with the pid value of real data in Program Map Table.
Info_index: the sequence number of information data, 8 bit fields, this field is different from info_PID, is used for the DISPLAY ORDER of descriptor data.Acquiescence is since 1 counting.
Info_type: the type of information data, 8 bit fields, its value is invalid for 0x0 represents, and 0x1 represents video data, and 0x2 represents voice data, 0x3 representative picture data, 0x4 represents lteral data, other are worth reservation, expand waiting.
Info_duration_time: the information displaying time, 32 bit fields are used for the time that descriptor continues demonstration, and unit is second.
Info_x: information is specified the x coordinate that is presented on screen, 16 bit fields, and unit is pixel.
Info_y: information is specified the y coordinate that is presented on screen, 16 bit fields, and unit is pixel.
Info_width: information is specified the width that is presented on screen, 16 bit fields, and unit is pixel.
Info_height: information is specified the height that is presented on screen, 16 bit fields, and unit is pixel.
Based on above-mentioned related information descriptor, headend equipment 1 need to add the related information descriptor in PSI/SI.The related information descriptor of each related information gathers together with corresponding package identification, sequence number, forms the related information descriptor of this digital TV network.
Preferably, headend equipment 1 can be added the related information descriptor in the information table of original information distributing system definition, the specific definition of this information table table is different according to the difference of information distributing system, can be BAT bouquet association table, the SDT Service Description Table of PSI/SI Plays, can be also the table that headend equipment 1 redefines as required.
After headend equipment 1 is completed type definition to programming events and related information, flow to into multiplexer multiplexing together with other program baseband transmission the PSI/SI of Event Information Table and related information descriptor, then with the process of the code stream after multiplexing modulating unit, transmit on digital TV network.
Further, described receiving terminal for digital television 2 comprises:
Frequency locking demodulation module 21, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.More specifically, receiving terminal for digital television 2 receive the user by remote controller send change the platform instruction after, dominant frequency point and demodulation in frequency locking demodulation module 21 locking digital TV networks obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.In the present embodiment, described receiving terminal for digital television 2 can be digital TV set-top box or Digital Television and set-top box integrated machine.
The first comparing module 22 is used for resolving described Event Information Table and related information descriptor, obtains the type of current programming events and the type of each related information; And whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; If consistent, judge that this related information is associated with current programming events.
More specifically, the first comparing module 22 is resolved Event Information Table, obtains the title of current programming events, and time started and duration, resolve simultaneously content descriptors and get one-level classification, the secondary classification of this programming events, if there is the User Defined classification also will obtain.The first comparing module 22 is also resolved described related information descriptor, obtains the type of each related information in described related information descriptor.When the type of the first comparing module 22 judgement related informations was consistent with the type of current programming events, the multiclass classification that must guarantee both was all identical consistent.Otherwise, ignore this related information, the first comparing module 22 continues to judge whether next related information is consistent with the type of current programming events, until all related informations in the related information descriptor are all completed judgement.
Information playing module 23 is used for playing the related information that is associated with described current programming events.More specifically, information playing module 23 comprises as shown in Figure 7:
Sign acquiring unit 231 is used for according to described related information descriptor, obtains described the first comparing module and judges with current programming events to package identification corresponding to related related information.
Packet acquiring unit 232 for the package identification that obtains according to described sign acquiring unit 231, obtains the corresponding data bag in baseband transmission stream.
Information playing unit 233 is used for resolving the packet that described packet acquiring unit 232 obtains, and plays according to play rules corresponding in described related information descriptor.Described play rules refers in the related information descriptor type by the information data of field info_type indication; The information displaying time of info_duration_time indication; Info_x: the information of indication is presented at the x coordinate on screen; The information of info_y indication is presented at the y coordinate on screen; The information of info_width indication is presented at width indication on screen; The information of info_height indication is specified the height that is presented on screen.
Preferably, if current programming events has a plurality of types identical related information with it, information playing module 23 according to each related information corresponding sequence number in the related information descriptor, is play related information in order.
Implement digital television information Play System provided by the invention, by programming events and related information are classified according to identical criteria for classification, can be accurately that various related informations are identical with type programming events is associated.When the user watches certain programming events of certain channel, receiving terminal for digital television is judged the classification of current programming events, receive the information corresponding with this programming events, present on TV, the information that this mode can be guaranteed to present on TV is consistent with the current program category of watching of user, have more specific aim, the user also more easily admits, and improves the propelling movement effect of information.
Referring to Fig. 6, be digital television information playing method the 3rd example structure schematic diagram provided by the invention, be with the difference of a upper embodiment, in the present embodiment, described related information descriptor is mainly described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined, the second comparing module 24 will be with the title of programming events and the keyword foundation that whether both are associated as judgement of related information, if do not add content descriptors in Event Information Table with the reply headend equipment, or digital TV network is not supported the situation of programming events classification.This digital television information playing method is as shown in Figure 6: this system comprises: headend equipment 1 and receiving terminal for digital television 2;
Described headend equipment 1 is used for the content according to each related information, the keyword of each related information of definition in the related information descriptor; And described Event Information Table and related information descriptor are added in baseband transmission stream, transmit on digital TV network.
Described receiving terminal for digital television 2, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; And resolve described Event Information Table and related information descriptor, obtain the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, play this related information.
More specifically, headend equipment 1 defines the keyword of each related information according to the content of each related information in the related information descriptor.In the present embodiment, the related information descriptor comprises: the package identification that each related information is corresponding, sequence number, type or keyword, play rules; Described related information descriptor is mainly described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
In embodiments of the present invention, can carry out as giving a definition the related information descriptor:
Associated?Information?Descriptor（）{
Descriptor_tag // 8bit may be defined as 0x8A herein
Descriptor_length // 8bit, descriptor length
Key_word_length // 8bit, key length
Key_word _ data () // keyword content
Info_PID // 8bit, the Packet Identifier of information data
Info_index // 8bit, the sequence number of information data
Info_type // 8bit, the type of information data
Info_duration_time // 32bit, the information displaying time
Info_x // 16bit is presented at the x coordinate on screen
Info_y // 16bit is presented at the y coordinate on screen
Info_width // 16bit is presented at the width on screen
Info_height // 16bit is presented at the height on screen
}
To comparing with an embodiment in above-mentioned related information descriptor, have the explanation of field of change as follows:
Key_word_length: key length, 8 bit fields.Be used for describing the length of ensuing key data, maximum is 255 bytes.Key_word _ data (): the keyword content, support Chinese, English, digital, conventional sign.Content-length equals the length of key_word_length.Consistent in the effect of other field and the second embodiment.
Headend equipment adds this related information descriptor in PSI/SI.The related information descriptor of each related information gathers together with corresponding package identification, sequence number, the related information descriptor that forms this digital TV network, then headend equipment flows to into multiplexer multiplexing together with other program baseband transmission Event Information Table and related information descriptor, code stream after multiplexing through modulating unit, is transmitted on digital TV network.
Preferably, the present embodiment can be added the related information descriptor in the information table of original information distributing system definition, the specific definition of this information table is different according to the difference of information distributing system, can be BAT bouquet association table, the SDT Service Description Table of PSI/SI Plays, can be also the table that headend equipment redefines as required.
Further, the receiving terminal for digital television that provides of the present embodiment specifically comprises:
Frequency locking demodulation module 21, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream.
The second comparing module 24 is used for resolving described Event Information Table and related information descriptor, obtains the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, judge that this related information is associated with current programming events.
More specifically, the second comparing module 24 is resolved Event Information Table, obtains the title of current programming events, and time started and duration; The second comparing module 24 is resolved described related information descriptor, obtains the keyword of each related information in described related information descriptor.The second comparing module 24 judges one by one whether the keyword of each related information in described related information descriptor is comprised by the title of current programming events.That is, whether the title of current programming events has comprised the keyword of each related information.When the keyword that is determined with related information when the second comparing module 24 is comprised by the title of current programming events, judge that this related information is the information that is associated with current programming events; Otherwise, ignore this related information, the second comparing module 24 continues to judge whether the keyword of next related information is comprised by the title of current programming events, until all related informations in the related information descriptor are all completed judgement.
Information playing module 23 is used for playing the related information that is associated with described current programming events.Information playing module 23 comprises as shown in Figure 7:
Sign acquiring unit 231 is used for according to described related information descriptor, obtains described the second comparing module and judges with current programming events to package identification corresponding to related related information.
Packet acquiring unit 232 for the package identification that obtains according to described sign acquiring unit 231, obtains the corresponding data bag in baseband transmission stream.
Information playing unit 233 is used for resolving the packet that described packet acquiring unit 232 obtains, and plays according to play rules corresponding in described related information descriptor.
Certainly, in a receiving terminal for digital television, whether support the classification of programming events according to Event Information Table, need to equip respectively the first comparing module or the second comparing module, with the different situation of correspondence.At last, it is emphasized that the receiving terminal for digital television in the present invention can be set-top box, perhaps Digital Television and set-top box integrated machine.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to complete by computer program, described program can be stored in a computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.

Claims (19)

1. a digital television information playing method, is characterized in that, comprising:
Dominant frequency point in the locking digital TV network and demodulation obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
Resolve described Event Information Table and related information descriptor, obtain each related information in described related information descriptor; And judge that according to the type of described each related information or keyword whether described each related information is associated with current programming events;
Play the related information that is associated with described current programming events;
The described Event Information Table of described parsing and related information descriptor obtain each related information in described related information descriptor; And judge according to described each related information descriptor whether the type of described each related information is related with current programming events, comprising:
If described Event Information Table is supported the classification of programming events, described related information descriptor comprises the type of related information; What the type of described related information was headend equipment according to this related information is content-defined;
Resolve described Event Information Table, obtain the type of current programming events; What the type of described programming events was headend equipment according to this programming events is content-defined;
Resolve described related information descriptor, obtain the type of each related information in described related information descriptor;
Whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; If consistent, judge that this related information is associated with current programming events.
2. digital television information playing method as claimed in claim 1, is characterized in that, described headend equipment is consistent with the criteria for classification of each related information in the related information descriptor to the criteria for classification of each programming events in Event Information Table.
3. digital television information playing method as claimed in claim 2, is characterized in that, the type of described programming events is represented by the content descriptors of the Event Information Table in Program Specific Information PSI/ business information SI standard.
4. digital television information playing method as claimed in claim 3, is characterized in that, described criteria for classification comprises: one-level classification, secondary classification and User Defined classification.
5. digital television information playing method as claimed in claim 1, is characterized in that, if described Event Information Table is not supported the classification of programming events, described related information descriptor comprises the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
6. digital television information playing method as claimed in claim 5, is characterized in that, the described Event Information Table of described parsing and related information descriptor obtain each related information in described related information descriptor; And judge that according to the keyword of described each related information whether described each related information is associated with current programming events, comprising:
Resolve described Event Information Table, obtain the title of current programming events;
Resolve described related information descriptor, obtain the keyword of each related information in described related information descriptor; What the keyword of described related information was headend equipment according to this related information is content-defined;
Judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, judge that this related information is associated with current programming events.
7. digital television information playing method as described in claim 4 or 6, is characterized in that, described related information descriptor comprises: the package identification that each related information is corresponding, sequence number, type or keyword, play rules.
8. digital television information playing method as claimed in claim 7, is characterized in that, this related information of described judgement is with after current programming events is associated, play with related information that described current programming events is associated before, also comprise;
Obtain the package identification corresponding with the related information that is associated of current programming events;
According to described package identification, obtain the corresponding data bag in baseband transmission stream.
9. digital television information playing method as claimed in claim 8, is characterized in that, described related information descriptor is inserted in the self-defining table of BAT bouquet association table, SDT Service Description Table or headend equipment in the PSI/SI standard.
10. a digital television information Play System, is characterized in that, comprising: headend equipment and receiving terminal for digital television;
Described headend equipment is used for the content according to each related information, package identification, sequence number, type or keyword, the play rules of each related information of definition in the related information descriptor; And described related information descriptor and Event Information Table are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; Resolve described Event Information Table and related information descriptor, obtain the related information descriptor of each related information; And judge one by one according to type or the keyword of described related information whether each related information is associated with current programming events; And the related information that broadcast is associated with described current programming events;
If described Event Information Table is supported the classification of programming events, described related information descriptor comprises the type of related information, described headend equipment,
Be used for the content according to each programming events, the type of each programming events of definition in Event Information Table; According to the content of each related information, package identification, sequence number, type, the play rules of each related information of definition in the related information descriptor; And described related information descriptor and Event Information Table are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television comprises:
The frequency locking demodulation module, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
The first comparing module is used for resolving described Event Information Table and related information descriptor, obtains the type of current programming events and the type of each related information; And whether the type that judges one by one each related information in described related information descriptor is consistent with the type of described current programming events; If consistent, judge that this related information is associated with current programming events;
The information playing module is used for playing the related information that is associated with described current programming events.
11. digital television information Play System as claimed in claim 10 is characterized in that, described headend equipment is consistent with the criteria for classification of each related information in the related information descriptor to the criteria for classification of each programming events in Event Information Table.
12. digital television information Play System as claimed in claim 11 is characterized in that, the type of described programming events is represented by the content descriptors of the Event Information Table in Program Specific Information PSI/ business information SI standard.
13. digital television information Play System as claimed in claim 12 is characterized in that, described criteria for classification comprises: one-level classification, secondary classification and User Defined classification.
14. digital television information Play System as claimed in claim 10 is characterized in that, if described Event Information Table is not supported the classification of programming events, described related information descriptor is described the keyword of related information; What the keyword of described related information was headend equipment according to this related information is content-defined.
15. digital television information Play System as claimed in claim 14 is characterized in that,
Described headend equipment is used for the content according to each related information, the keyword of each related information of definition in the related information descriptor; And described Event Information Table and related information descriptor are added in baseband transmission stream, transmit on digital TV network;
Described receiving terminal for digital television, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream; And resolve described Event Information Table and related information descriptor, obtain the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, play this related information.
16. digital television information Play System as claimed in claim 15 is characterized in that, described receiving terminal for digital television comprises:
The frequency locking demodulation module, the dominant frequency point and the demodulation that are used in the locking digital TV network obtain baseband transmission stream, obtain Event Information Table and related information descriptor in described baseband transmission stream;
The second comparing module is used for resolving described Event Information Table and related information descriptor, obtains the title of current programming events and the keyword of each related information; And judge one by one the keyword that whether comprises each related information in described related information descriptor in the title of described current programming events; If comprise, judge that this related information is associated with current programming events;
The information playing module is used for playing the related information that is associated with described current programming events.
17. digital television information Play System as described in claim 10 or 16 is characterized in that, described related information descriptor is inserted in the self-defining table of BAT bouquet association table, SDT Service Description Table or headend equipment in the PSI/SI standard.
18. digital television information Play System as claimed in claim 17 is characterized in that, described information playing module comprises:
The sign acquiring unit is used for according to described related information descriptor, obtains package identification corresponding to related information that described the first comparing module or the second comparing module and current programming events are associated;
The packet acquiring unit for the package identification that obtains according to described sign acquiring unit, obtains the corresponding data bag in baseband transmission stream;
Information playing unit is used for resolving the packet that described packet acquiring unit obtains, and plays according to play rules corresponding in described related information descriptor.
19. digital television information Play System as claimed in claim 18 is characterized in that, described receiving terminal for digital television is set-top box or digital TV integrated machine.
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