CN100466731C - Universal break-in broadcasting for descriptor - Google Patents
Universal break-in broadcasting for descriptor Download PDFInfo
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- CN100466731C CN100466731C CNB2005100988568A CN200610069016A CN100466731C CN 100466731 C CN100466731 C CN 100466731C CN B2005100988568 A CNB2005100988568 A CN B2005100988568A CN 200610069016 A CN200610069016 A CN 200610069016A CN 100466731 C CN100466731 C CN 100466731C
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Abstract
This invention relates to one common plug play method in EPG system about private and self definition in digital television broadcast technique, which uses DVB business information rules description to convert into two bit character string property less than 255 bits, which comprises the steps of definition characters and generating description content and storing to center database, description character plug and play and test, wherein, description plug aiming at network ID, TS and business ID class for user to define and operate based on DVB business information.
Description
Technical field
The invention belongs to the technical field of video coding of digital video broadcasting, more particularly relate to the improvement of the general insertion broadcasting method of the self-defined descriptor of digital TV broadcasting service information.
Background technology
Descriptor (multiple descriptor) is some independently bit streams, is the string of binary characters that is no more than 255 bytes in essence.
In digital television broadcasting, actual operation system mostly need be outside the descriptor of DVB (digital video broadcasting) business information normalized definition, according to self operation characteristic, and more self-defined privately owned descriptors, be inserted in the business information, required to satisfy operation.
Because the privately owned descriptor of various places operator definition is not quite similar, and changes EPG versatile and flexible, traditional (electronic program guides) system and all only support specific descriptor set to satisfy the operation requirement.Support for privately owned descriptor often needs special exploitation, can't satisfy user's needs very neatly.This just brings inconvenience to digital TV broadcasting service.Universal description symbol insertion method of the present invention can not done system under the prerequisite of any secondary development, satisfies the insertion demand of any descriptor.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of general insertion broadcasting method of descriptor is provided.No matter it can need the actual content of the descriptor of insertion, system is not being done under the prerequisite of any secondary development, satisfy the insertion of any descriptor.The final form of expression of the descriptor of this method is a string of binary characters that is no more than 255 bytes, can generate according to carrier customization.
In order to achieve the above object, the present invention includes following steps:
(1) definition of descriptor: the descriptor characteristic that defines required generation, five parameters of the circulation number of plies that comprise title, tag value, descriptor structure, insertable table name and the table of descriptor, and the verification rule of inserting as descriptor with the circulation number of plies of tag value, insertable table name and table;
(2) generation of descriptor content and record: the filling in of descriptor content of complete form arranged, and system provides a description the content User Interface of each subdomain of symbol, fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; Do not have the descriptor content of complete form and fill in, according to the formal definition of descriptor, the binary content that calculates descriptor is filled in, and fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; The equal recorded and stored of final result is in central database;
(3) insertion of descriptor and broadcasting: any descriptor that can select to generate is inserted into the user and wants the place of inserting, and the selection of descriptor insertion position can be provided to TS rank, business-level, table type, circulating level rank; Conversion between descriptor character string and the descriptor particular content is carried out by program, and is kept at respectively in the different tables, opens two groups of tables during edit descriptor, and its content changes simultaneously;
(4) verification of descriptor insert module: the verification rule is the verification rule stipulated in aforementioned (1) descriptor definition and the definition of descriptor structure, comprises the Tag value of table that descriptor can insert and position, descriptor, and content can not surpass 255 bytes.
Conversion between descriptor character string and the descriptor particular content may further comprise the steps:
(1) according to the option at system description symbol interface, system for filling ID value, system's pid value and three territories of private data;
(2) according to the definition of system description symbol, convert these three territories to binary system identifier value, Reserved+ system pid value and private data respectively;
(3) again according to the physical length of system description symbol, calculate the total length of descriptor;
(4) to the end descriptor string of binary characters;
(5) after set-top box receives,, this character string parsing is become corresponding value according to the tag value and the structure of descriptor.
The insertion of descriptor is broadcasted can be at network ID, TS stream ID, traffic ID rank.
EPG descriptor inserter is according to the DVB standard, and planning realizes in the real system operation.Its function is all can insert descriptor, and for each descriptor that has in the standard, its personalized interface be arranged all at each network, each transmission code stream (TS), each Service (business), each table.Privately owned descriptor can define, generates and insert.
In the descriptor, can in database, define, and can determine broadcasting of it according to broadcasting parameter for descriptor commonly used.This part content that is referred to as this part descriptor of " automatically " mode in the descriptor insert module is that the user generates in configuration network automatically; And another part is become the descriptor of " manually ", and the user's secundum legem that then needs of its content generates its content.
No matter be the descriptor of " automatically ", still the descriptor of " manually " all still is the content generating portion, if allow it come into force, then needs to utilize the descriptor generation to broadcast configuration interface and broadcasts configuration.
The insertion of descriptor can be divided into three processes:
The definition of descriptor, standard descriptor can write direct database as the definition a part, according to the SI standard fill in into.The definition of privately owned descriptor need provide the interface allow user definition, and definition comprises name, tag value, the descriptor structure of descriptor, the circulation number of plies of insertable table name and table etc.Verification rule as the descriptor insertion.
Descriptor content generates, and this piece is made up of two parts, and " manually " part is that the user is inserting the generation of descriptor section branch, the descriptor body that descriptor has complete form to exist.Descriptor content is filled in, and according to the descriptor of selecting, opens the customization interface, inserts descriptor content, fills in to calculate descriptor length after finishing, and generates descriptor content afterwards, and records in the database; Another part is (for example being inserted in the short-event descriptor among the EIT) that use always or relevant with program, and this part content generates and obtains in program, can really not generate descriptor body character string in this module.Can accomplish good versatility and autgmentability like this.The descriptor of identical tag can have many records, differentiates with an ID between them, can insert the descriptor of identical tag, different content in such table, also can insert the descriptor of different content in different service.
Whether the part that generates the descriptor content body can change, delete for the user, do not have the descriptor of descriptor body not allow to change and delete, but can allow the user select to broadcast.
Third part is that descriptor inserts and broadcasts configuration, and any descriptor that can select for second step generated is inserted into the user and wants the place of inserting, include the descriptor body and do not have.The descriptor insertion position is selected, and can be provided to TSID, ServiceID, table type, circulating level rank.
Conversion between descriptor character string and the descriptor particular content is carried out by program, and is kept at respectively in the different tables, opens two groups of tables during user's edit descriptor, and its content changes simultaneously.
Some business in network settings and Promgramming, NVOD business for example, system generates corresponding descriptor automatically, and inserts the descriptor content storehouse and broadcast in the storehouse.The user can delete and broadcast setting.
The verifying function that descriptor insert module band is certain, its verification rule is to stipulate in the descriptor definition table, and the descriptor structure definition, comprise that table and position, the Tag value of descriptor, total content that descriptor can insert can not surpass 255 characters.
At each standard descriptor, module all has corresponding specific descriptions symbol editing interface and one group of list structure, carries out related with ID with the content master meter by the tag value.Self-defining descriptor only provides a unified table and character string to insert editing interface at present.
EPG descriptor device can be finished strong functions, because in the DVB system, control information all is to carry out with the various descriptors in various tables and the table basically.
Task of the present invention comes to this and finishes.
Universal description symbol of the present invention inserts broadcasting method contrast prior art following beneficial effect: by descriptor content is reduced into the most essential string of binary characters, the descriptor content of operation layer and transport layer are separated, having satisfied operator can define the requirement of privately owned descriptor according to self runing needs, has improved flexibility and the extensibility of EPG system.This method is followed digital video broadcasting business information (DVB SI, i.e. Digital Video Broadcast Service Information) related specifications fully.No matter can need the actual content of the descriptor of insertion, system is not being done under the prerequisite of any secondary development, satisfy the insertion of any descriptor.The final form of expression of the descriptor of this method is a string of binary characters that is no more than 255 bytes, can generate according to carrier customization.Can be widely used in the digital video broadcasting.
Description of drawings
Fig. 1 is the conversion process figure between descriptor character string of the present invention and the descriptor particular content.
Embodiment
Embodiment 1.A kind of general insertion broadcasting method of descriptor.May further comprise the steps:
(1) definition of descriptor: the descriptor characteristic that defines required generation, five parameters of the circulation number of plies that comprise title, tag value, descriptor structure, insertable table name and the table of descriptor, and the verification rule of inserting as descriptor with the circulation number of plies of tag value, insertable table name and table;
(2) generation of descriptor content and record: the filling in of descriptor content of complete form arranged, and system provides a description the content User Interface of each subdomain of symbol, fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; Do not have the descriptor content of complete form and fill in, according to the formal definition of descriptor, the binary content that calculates descriptor is filled in, and fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; The equal recorded and stored of final result is in central database;
(3) insertion of descriptor and broadcasting: any descriptor that can select to generate is inserted into the user and wants the place of inserting, and the selection of descriptor insertion position can be provided to TS rank, business-level, table type, circulating level rank; Conversion between descriptor character string and the descriptor particular content is carried out by program, and is kept at respectively in the different tables, opens two groups of tables during edit descriptor, and its content changes simultaneously;
(4) verification of descriptor insert module: the verification rule is the verification rule stipulated in aforementioned (1) descriptor definition and the definition of descriptor structure, comprises the Tag value of table that descriptor can insert and position, descriptor, and content can not surpass 255 bytes.
Content with CA (condition reception) descriptor is an example, and structure is as follows:
| Grammer | Figure place | Memonic symbol |
| CA_descriptor(){ descriptor_tag descriptor_length CA_system_ID reserved CA_PID for(i＝0；i<N；i++){ private_data_byte } } | 8 8 16 3 13 8 | uimsbf uimsbf uimsbf bslbf uimsbf |
The semantical definition of field is as follows in the descriptor:
CA system identifier field CA_system_ID
16 bit fields, point out the ECM that is used to be correlated with and (or) the CA system type of EMM stream.Its coded system is special definition, rather than is specified by international standard.
CA PID field CA_PID
13 bit fields.Point out to comprise the ECM of the CA system that is used for relevant CA_system_ID defined or the PID of EMM transmission of Information stream packets.The content of the grouping that CA_PID is indicated (ECM or EMM) is by the context decision that CA_PID occurred, i.e. TS_program_map_section in the transport stream or CA table, or the stream_id field in the program stream.
As shown in Figure 1, the conversion between descriptor character string and the descriptor particular content may further comprise the steps:
(1), fills in CA system identifier value, CAPID value and three territories of private data according to the option at CA descriptor interface;
(2) according to the definition of CA descriptor, convert these three territories to binary CA system identifier value, Reserved+CAPID value and private data respectively;
(3) again according to the physical length of CA descriptor, calculate the total length of descriptor;
(4) to the end descriptor string of binary characters;
(5) after set-top box receives,, this character string parsing is become corresponding value according to the tag value and the structure of descriptor.
The insertion of descriptor is broadcasted can be at network ID, TS stream ID, traffic ID rank.
No matter present embodiment can need the actual content of the descriptor of insertion, system is not being done under the prerequisite of any secondary development, satisfy the insertion of any descriptor.The final form of expression of the descriptor of this method is a string of binary characters that is no more than 255 bytes, can generate according to carrier customization.It can be widely used in the digital video broadcasting.
Claims (3)
1. the general insertion broadcasting method of a descriptor is characterized in that may further comprise the steps:
(1) definition of descriptor: the descriptor characteristic that defines required generation, five parameters of the circulation number of plies that comprise title, tag value, descriptor structure, insertable table name and the table of descriptor, and the verification rule of inserting as descriptor with the circulation number of plies of tag value, insertable table name and table;
(2) generation of descriptor content and record: the filling in of descriptor content of complete form arranged, and system provides a description the content User Interface of each subdomain of symbol, fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; Do not have the descriptor content of complete form and fill in, according to the formal definition of descriptor, the binary content that calculates descriptor is filled in, and fills in to calculate descriptor length after finishing, and divides and generates descriptor content inserting descriptor section afterwards; The equal recorded and stored of final result is in central database;
(3) insertion of descriptor and broadcasting: any descriptor that can select to generate is inserted into the user and wants the place of inserting, and the selection of descriptor insertion position is provided to TS rank, business-level, table type, circulating level rank; Conversion between descriptor character string and the descriptor particular content is carried out by program, and is kept at respectively in the different tables, opens two groups of tables during edit descriptor, and its content changes simultaneously;
(4) verification of descriptor insert module: the verification rule is the regulation in abovementioned steps (1) descriptor definition, but total content of descriptor can not surpass 255 bytes.
2. according to the general insertion broadcasting method of the described descriptor of claim 1, it is characterized in that the conversion between said descriptor character string and the descriptor particular content may further comprise the steps:
(1) according to the option at system description symbol interface, system for filling ID value, system's pid value and three territories of private data;
(2) according to the definition of this descriptor, convert these three territories to binary system identifier value, Reserved+ system pid value and private data respectively;
(3) again according to the physical length of system description symbol, calculate the total length of descriptor;
(4) to the end descriptor string of binary characters;
(5) after set-top box receives,, this character string parsing is become corresponding value according to the tag value and the structure of descriptor.
3. according to the general insertion broadcasting method of claim 1 or 2 described descriptors, it is characterized in that the insertion of said descriptor is broadcasted at network ID, TS stream ID, traffic ID rank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101252668B (en) * | 2007-12-26 | 2010-06-09 | 深圳创维数字技术股份有限公司 | Digital television information broadcasting system and equipment |
| CN102291611B (en) * | 2011-08-01 | 2013-08-07 | 四川长虹电器股份有限公司 | Method for generating upgrade code streams of set-top box |
| CN103024515A (en) * | 2012-12-10 | 2013-04-03 | 康佳集团股份有限公司 | Code stream analytical method and system capable of leading in descriptor format from outside |
| CN104936007A (en) * | 2014-03-20 | 2015-09-23 | 四达时代通讯网络技术有限公司 | Digital television zone control method and control system and digital cable television system |
| CN106254898A (en) * | 2016-08-15 | 2016-12-21 | 杭州当虹科技有限公司 | A kind of TS bag inserts the method for interactive advertisement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000045292A1 (en) * | 1999-01-28 | 2000-08-03 | Koninklijke Philips Electronics N.V. | System and method for describing multimedia content |
| CN1318169A (en) * | 1999-05-24 | 2001-10-17 | 索尼公司 | Information processing device and method, and information processing system |
| US20030103446A1 (en) * | 2000-08-25 | 2003-06-05 | Shinji Negishi | Digital broadcast system |
| JP2003298542A (en) * | 2002-04-05 | 2003-10-17 | Canon Inc | Digital broadcast transmitter, digital broadcast transmission method, digital broadcast receiver, and identifier providing apparatus |
| EP1564991A1 (en) * | 2002-11-21 | 2005-08-17 | Sony Corporation | Broadcast system, receiver apparatus, broadcast data protection method, and receiving method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000045292A1 (en) * | 1999-01-28 | 2000-08-03 | Koninklijke Philips Electronics N.V. | System and method for describing multimedia content |
| CN1318169A (en) * | 1999-05-24 | 2001-10-17 | 索尼公司 | Information processing device and method, and information processing system |
| US20030103446A1 (en) * | 2000-08-25 | 2003-06-05 | Shinji Negishi | Digital broadcast system |
| JP2003298542A (en) * | 2002-04-05 | 2003-10-17 | Canon Inc | Digital broadcast transmitter, digital broadcast transmission method, digital broadcast receiver, and identifier providing apparatus |
| EP1564991A1 (en) * | 2002-11-21 | 2005-08-17 | Sony Corporation | Broadcast system, receiver apparatus, broadcast data protection method, and receiving method |
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