CN101572798B - Method, device and system for program searching - Google Patents

Method, device and system for program searching Download PDF

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Publication number
CN101572798B
CN101572798B CN2009101075593A CN200910107559A CN101572798B CN 101572798 B CN101572798 B CN 101572798B CN 2009101075593 A CN2009101075593 A CN 2009101075593A CN 200910107559 A CN200910107559 A CN 200910107559A CN 101572798 B CN101572798 B CN 101572798B
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transport stream
main transport
program
network side
described main
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CN101572798A (en
Inventor
杨小为
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Global Innovation Polymerization LLC
Tanous Co
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Huawei Device Co Ltd
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Priority to CN2009101075593A priority Critical patent/CN101572798B/en
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Priority to PCT/CN2010/073341 priority patent/WO2010139254A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2362—Generation or processing of Service Information [SI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4383—Accessing a communication channel
    • H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/482—End-user interface for program selection

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

The embodiment of the invention provides a method, a device and a system for program searching. The implementation procedure of the method is as follows: the primary transmission flow issued by the lateral front equipment of the network is acquired, the primary transmission flow comprises the program description information of programs corresponding to the primary transmission flow issued by the lateral front equipment of the network and other transmission flows besides the primary transmission flow; the program description information of programs corresponding to the primary transmission flowissued by the lateral front equipment of the network and other transmission flows besides the primary transmission flow are extracted from the primary transmission flow; and program searching is carr ied out according to the extracted program description information. With the technical scheme of the invention adopted, the problem of the prior art that the operation process is complex and the time consumption is too large because each transmission flow is required to be locked respectively in the program searching process to resolve the program description information corresponding to each transmission flow is resolved.

Description

A kind of methods, devices and systems of program searching
Technical field
The present invention relates to the digital television techniques field, relate in particular to a kind of method, device and system of program searching.
Background technology
Digital television system is a kind of system that digitized TV programme and associated various value-added services can be provided.Digital television system mainly is divided into three parts: the collection of program, making and coding (being digitlization); The transmission of program; The reception of program and decoding.An end that sends information in the digital TV network is called front end, and an end at recipient place is called terminal.Digital TV set-top box is the terminal in the digital TV network, and TV user is just by television services that its receiving front-end provided and other value-added service.
The program searching service be set-top box for TV user provide the most basic, also be most important a kind of business.In existing DVB (Digital Video Broadcasting, digital video broadcasting) system, programme information has been divided into a plurality of transport stream TS (Transport Stream), and each transport stream is all transmitted in certain frequency.In the program searching process, set-top box need be (the Program Special Information of the program specific information PSI in each transport stream, program specific information)/SI (ServiceInformation, business information) collects respectively, and be stored in the nonvolatile memory of set-top box with the form of the rendition list, so that the user can select when needs are watched program.PSI/SI information spinner wherein will be stored by the form of DVB table.
In the DVB standard, table (Table) is a kind of form of organizational information, and all PSI/SI information all is the form tissue with table.The table that may relate in the program searching process comprises: PAT (ProgramAssociation Table, Program Association Table), PMT (Program Map Table, Program Map Table), SDT (Service Description Table, SDT Service Description Table), NIT (Network Information Table, network information table), wherein: pat table is used for describing PID (the Packet Identifier of all professional pmt tables of current transport stream, the bag sign), by pat table, set-top box can be determined all professional pmt table positions in transport stream; Program stream circulation to the effect that of pmt table, the SDT table has been described all professional descriptors in the current transport stream, and these descriptors may comprise program category, programm name or the like, and these information are to present to the user; NIT table has been described the descriptor of current network, comprise transport stream list, and parameters such as the frequency, symbol rate, modulation system of transport stream identification, transport stream have been described in this tabulation, and according to these parameters, set-top box can lock certain transport stream.
The method that a kind of search is provided in the prior art is to have utilized the NIT table in the network.Contain a transport stream list in the NIT table, the frequency of transport stream identification, transport stream, symbol rate, parameters such as modulation system have been described in this tabulation, it is the signal of each transport stream of lockable that set-top box device utilizes this tabulation, thereby obtains the programme information in each transport stream.Its search procedure is as follows: (1) search NIT obtains the frequency tabulation; (2) judge whether frequency tabulation searches for and finish, finish, then finish; If do not finish, then enter (3); (3) obtain a not frequency of search; (4) be tuned to this frequency, receive pat table, pmt table, SDT table; (5) extract programme information, enter (2).
In finishing process of the present invention, the inventor finds that there is following shortcoming at least in prior art: because programme information PSI/SI is dispersed in each transport stream, set-top box have to lock the respectively signal of each frequency, could resolve programme information wherein then, the process complexity and the efficient of its search are very low.
Summary of the invention
The embodiment of the invention provides a kind of method, system and equipment of program searching, to solve complicated operation and the excessive problem of time loss in the program searching process that exists in the prior art.
Embodiments of the invention provide a kind of method of program searching on the one hand, and this method comprises:
Obtain the main transport stream that the network side headend equipment issues, comprise the described main transport stream that the network side headend equipment issues and the program description of the corresponding programs of other transport stream except that described main transport stream in the described main transport stream;
The program description of described main transport stream that the described network side headend equipment of extraction issues from described main transport stream and the corresponding programs of other transport stream except that described main transport stream;
Program description according to described extraction is carried out program searching.
Embodiments of the invention also provide a kind of transmission method of network side program description, and this method comprises:
From transport stream waiting for transmission, select at least one transport stream, as main transport stream;
Comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream is set in described at least one main transport stream of determining;
Give subscriber terminal equipment with described main transport stream and other transport stream except that described main transport stream of comprising by Network Transmission.
The embodiment of the invention also provides a kind of terminal equipment, and this equipment comprises:
Receiving element, be used to obtain the main transport stream that the network side headend equipment issues, comprise the program description of other transport stream except that described main transport stream in the program description of the described main transport stream that the network side headend equipment issues and the described a plurality of transport stream in the described main transport stream;
Extraction unit is used for extracting the described main transport stream that described network side headend equipment issues and the program description of other transport stream correspondence programs except that described main transport stream from described main transport stream;
Search unit is used for carrying out program searching according to the program description of described extraction.
Embodiments of the invention also provide a kind of network side headend equipment, and this network side headend equipment comprises:
Determining unit is used for selecting at least one transport stream from transport stream waiting for transmission, as main transport stream;
The unit is set, is used for comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream being set in described at least one main transport stream of determining;
Transmission unit is used for giving terminal equipment with described main transport stream and other transport stream except that described main transport stream of comprising by Network Transmission.
Embodiments of the invention also provide a kind of program search device, and described system comprises:
The network side headend equipment, be used for selecting at least one transport stream arbitrarily from transport stream waiting for transmission, as main transport stream, comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream is set in described at least one main transport stream of determining, with described comprise main transport stream and other transport stream except that described main transport stream by Network Transmission to terminal equipment;
At least one terminal equipment, be used to obtain the main transport stream that the network side headend equipment issues, comprise the program description of the described main transport stream that the network side headend equipment issues and the program description of other transport stream except that described main transport stream in the described main transport stream, from described main transport stream, extract described main transport stream that described network side headend equipment issues and the program description of removing the program that other transport stream comprise of described main transport stream, and carry out program searching according to the program description of described extraction.
Adopt the technical scheme of the embodiment of the invention, by at transport stream (TS that network side transmitted, at least one main transport stream is set Transport Stream), described at least one main transport stream is not only transmitted the program description and the programme content of this main transport stream correspondence, the program description of other transport stream that also subsidiary transmission and this main transport stream together issue, make after user terminal receives the transport stream that is issued by the network side front end, by finding described main transport stream, therefrom can get access to the program description of the program correspondence in all transport stream that the network side headend equipment issues easily, whole like this search procedure only needs the tuner of terminal equipment to carry out once tuning, just can search the descriptor of all programs, make that the process of whole search is simpler, and time loss seldom.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the inventive method embodiment 1 correspondence;
Fig. 2 is the schematic flow sheet of the inventive method embodiment 2 correspondences;
Fig. 3 is the schematic diagram of photos and sending messages under the general networks side headend equipment;
Fig. 4 is the schematic diagram of photos and sending messages under the network side headend equipment among the method embodiment of the present invention;
Fig. 5 is the structural representation of system embodiment of the present invention;
Fig. 6 is the structural representation of network side headend equipment embodiment of the present invention;
Fig. 7 is the structural representation of terminal equipment embodiment 1 of the present invention;
Fig. 8 is the structural representation of acquiring unit among the terminal equipment embodiment 1 of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Method embodiment
Method embodiment 1
Method embodiment 1 of the present invention can describe by accompanying drawing 1
101, obtain the main transport stream that the network side headend equipment issues, comprise the described main transport stream that the network side headend equipment issues and the program description of the corresponding programs of other transport stream except that described main transport stream in the described main transport stream;
In the process of performing step 101, the network side headend equipment can adopt the mode of clean culture or the mode of multicast to issue transport stream to terminal equipment.Main transport stream wherein is the transport stream of corresponding dominant frequency point, the value that corresponding dominant frequency point can be set to fix for Virtual network operator, and inform the user by mode oral or that write on specification by operator, the provider of terminal software can be realizing full automatic program searching process in this value write-in program; Dominant frequency point also can not be redefined for fixing value, and is the dominant frequency point by operator's at least one frequency of mark in the network information table that it issues; Can also adopt in the packet header of transport stream and beat the mark that label manner realizes main transport stream.
For the reliability that guarantees that dominant frequency point is determined, by planning a plurality of dominant frequency points, when a dominant frequency point is not an effective dominant frequency point, perhaps the tuner of set-top box can not be accurately be tuned to during some dominant frequency points, owing to be provided with a plurality of dominant frequency points, can proceed the tuning of other dominant frequency points, adopt the mode of dominant frequency point backup like this, strengthen the reliability of program description search greatly.
102, the program description of described main transport stream that the described network side headend equipment of extraction issues from described main transport stream and the corresponding programs of other transport stream except that described main transport stream;
In implementing 102 process, by in main transport stream, extracting respectively to the program description that should main transport stream and the program description of corresponding other transport stream.
Specifically can from described main transport stream, obtain the NIT table; Determine the transport stream identification information of all transport stream that described network side headend equipment issues according to described NIT table; Determine the program description of all transport stream correspondences according to the described transport stream identification that obtains.
103, carry out program searching according to the program description of described extraction.
In the process of enforcement 103, by the program description that extraction obtains, set up the list information of program, realize the search of program.
As seen from the above, embodiments of the invention are by setting main transport stream in the transport stream that issues at the network side headend equipment, the program description that in main transport stream, has all transport stream of correspondence that the network side headend equipment issues, subscriber terminal equipment only need be positioned at the dominant frequency point, just can extract the program description that obtains all transport stream, make the simple more and time loss of the process of whole search seldom.
Method embodiment 2
Below by a specific embodiment process of this program searching is described, embodiment 2 can describe by accompanying drawing 2
201, the network side headend equipment selects at least one transport stream as main transport stream from transport stream to be issued, the program description of a plurality of transport stream correspondences of the required transmission of network side headend equipment is set in the described main transport stream, and gives terminal equipment by Network Transmission described a plurality of transport stream;
Implementing in 201, corresponding program description not only comprises the program description and the program content data of described main transport stream in a plurality of transport stream of the required transmission of described network side, also comprises the corresponding program description of other transport stream that together issues with described main transport stream;
Main transport stream frequency points corresponding is the dominant frequency point, has determined that dominant frequency point just can lock main transport stream.The value that corresponding dominant frequency point is set to fix by Virtual network operator, and inform the user by mode oral or that write on specification by operator, the provider of terminal software can be the full automatic program searching process of realization in this value write-in program; The dominant frequency point can also not preestablish fixed value, and is the dominant frequency point by operator's at least one frequency of mark in its NIT that issues table.For the reliability that guarantees that dominant frequency point is determined, by planning a plurality of dominant frequency points, when a dominant frequency point is not an effective dominant frequency point, perhaps the tuner of set-top box can not be accurately be tuned to during some dominant frequency points, owing to be provided with a plurality of dominant frequency points, can proceed the tuning of other dominant frequency points, adopt the mode of dominant frequency point backup like this, strengthen the reliability of program description search greatly.
Described main transport stream not only comprises the program description and the program content data of main transport stream correspondence, also comprise the corresponding program description of other transport stream that together issues with described main transport stream, the program description of other transport stream that described and main transport stream together issues is mainly by expanding the mode of DVB agreement.In existing DVB standard, as shown in Figure 3, the structure that issues for existing digital network information, wherein, the network side headend equipment issues three transport stream, be respectively: transport stream 1, transport stream 2, transport stream 3, wherein transport stream 1 comprises the descriptor 1 of the program that is issued in the transport stream 1 and the content information 1 of program, and transport stream 2 and transport stream 3 are carried corresponding program description and program content information respectively.Find out from this, if the program that the network side headend equipment is issued is when searching for, need respectively with the tuner of terminal equipment (is example with the digital TV set-top box) respectively be tuned to each transport stream frequency points corresponding, by being decoded, transport stream can get access to the program description of the entrained program correspondence of described transport stream, as can be seen, the process need of this program searching is constantly tuning, constantly carries out the locking of tuner, and whole process operation is complicated and very consuming time.
By expanding to the DVB standard, present embodiment is selected some or a plurality of transport stream in transport stream be main transport stream, expand the description scope of the program description of main transport stream, make winner's transport stream (with the transport stream among Fig. 41 as main transport stream) not only carry the program description 1 and the program content information 1 of transport stream 1, also carry the program description of transport stream 2 and transport stream 3, like this, when these transport stream when network side is handed down to subscriber terminal equipment (is example with the set-top box), set-top box by tuner be tuned to transport stream 1 frequency points corresponding, and then the data in the corresponding frequency are decoded, so just can get access to the program description (promptly corresponding to transport stream in this example 2 and transport stream 3) in all transport stream that issue.
Following mask body is discussed the program description that expansion how to carry out the DVB standard is implemented in middle other transport stream of transmission in the main transmission:
Table among the DVB adopts following mode to define, please referring to table one:
Field Semantic
Table_id The table sign is in order to determine the type of table.
Table_id_ext The expansion of table sign is at the additional information of particular table type.
Section_length The length of a segmentation of table.
Section_number Fragment number is in order to distinguish each segmentation in the table.
Last_section_number Last fragment number is in order to identify last fragment number.
Table one
Following table table two is the definition to the Table_id of DVB table:
The DVB table Table_id
PAT 0x00
PMT 0x02
SDT 0x42
SDT?other 0x46
BAT 0x4A
User definition 0x80-0xFE
Table two
Wherein, the program description table that defines in the DVB standard has: PAT (Program Association Table), PMT (Program Map Table), SDT (SDT Service Description Table), NIT (network information table).
Just can determine the type shown by the table_id field, just can know which table is PAT, which table is PMT, and which table is SDT and NIT.Table_id_ext provides some additional informations of closing with the epiphase of this type, such as for PAT, table_id_ext represents the sign (transport_stream_id) of the TS stream at PAT place, and for pmt table, table_id_ext has then represented the sign of the affiliated program of pmt table, promptly corresponding to program_number.
Pat table has been described the PID (if there is pmt table in this business) of all the professional pmt tables in the current transport stream, and by pat table, set-top box can be determined all professional pmt table positions in transport stream.The content of a typical pat table is as shown in Table 3:
Program_number (program number) PMT_PID
0x0001 0x0100
0x0002 0x0101
0x0003 0x0102
0x0004 0x0103
Table three
The address of the various program streams of the program to the effect that of pmt table, a program comprises two or more program streams usually, can comprise two program streams (i.e. a video flowing and an audio stream) such as a typical program, if bilingual program then can comprise a video flowing and two audio streams.Usually comprise a plurality of pmt tables in each transport stream, the number of the program in the number of pmt table and this transport stream is identical.The structure of a typical pmt table is as shown in Table 4:
Stream type Language The PID of media stream Extending marking
Video flowing Chinese 0x301 0
Audio stream Chinese 0x302 0
Audio stream English 0x303 0
Table four
The SDT table has been described all professional descriptors in the current transport stream, and these descriptors may comprise program category, programm name or the like.And the also target of program searching just of these information.Having only a SDT table in the transport stream, is the example of a SDT table below:
Program_number (program number) Program names Program category Whether there is schedule information
0x0001 The Chinese Central Television (CCTV)-1 TV 1
0x0002 The Chinese Central Television (CCTV)-2 TV 1
0x0003 The Chinese Central Television (CCTV)-3 TV 1
0x0004 Educational broadcast Audio broadcasting 1
Table five
The NIT table has been described the descriptor of current network, and to the effect that the cable transmission parameter of each program was joined the cable transmission parameter, and set-top box can lock certain transport stream.
Corresponding to Fig. 4, the description scope for the program description of expanding main transport stream makes the program description 1 and the program content information 1 that not only carry transport stream 1 in winner's transport stream, also carries the program description of transport stream 2 and transport stream 3.
So need to expand the description to the structure of main transport stream of DVB standard, if the program description 1 of main transport stream (promptly corresponding to the transport stream in the previous example 1) comprises that respectively (need to prove: a transport stream can comprise a plurality of programs to following each table, and the corresponding pmt table of program, therefore, following pmt table adopts the form of sequence to carry out mark, suppose transport stream 1, transport stream 2 and transport stream 3 all comprise N program): PAT1, PMT1i (wherein, i is an integer, 1≤i≤N), information such as SDT1, and the table that the program description 2 of transport stream 2 comprises is: PAT other1, PMT2i (wherein, i is an integer, 1≤i≤N), SDT other1; And the table that the program description 3 of transport stream 3 comprises is: (wherein, i is an integer, 1≤i≤N), SDT other2 for PAT other2, PMT3i; Because transport stream 2 and transport stream 3 corresponding program description 2 and program description 3 are arranged in the main transport stream (corresponding to transport stream 1), therefore, need expand the DVB standard, because PAT other1, PAT other2 and PAT1 transmit in same transport stream, therefore their PID is identical, and PMT2i (wherein, i is an integer, the transport_stream_id of 1≤i≤N) is determined by PAT other1, and the transport_stream_id of PAT other1 promptly identifies its correspondence is the pat table of transport stream 2 correspondences, PMT3i (wherein, i is an integer, the transport_stream_id of 1≤i≤N) is determined by PAT other2, and the transport_stream_id of PAT other2 promptly identifies its correspondence is the pat table of transport stream 3 correspondences, SDT other1 is identical with grammer and the SDT1 of SDT other2, and concrete parameter is different, concrete with reference to following description, what wherein SDT other1 and SDT other2 described respectively is transport stream 2 and transport stream 3 corresponding service description lists, table_id and transport stream identification transport_stream_id difference in the SDT table.
Below be each concrete definition of showing:
Wherein: PAT1 is defined as follows:
Figure G2009101075593D00101
Table six
Wherein the table_id of PAT1 is the regulation according to DVB, is the 0x00 that fixes; Since PAT1 at be transport stream 1, its transport_stream_id is defined as 0X00.
In " other " field of PAT1, also comprise the program_number sequence field, in the program_number field, specifically comprised the program related information of PAT1 correspondence, following table is the program number that example explanation PAT1 comprises:
Program_number (program number) PMT_PID
0x0001 0x0100
0x0002 0x0101
0x0003 0x0102
0x0004 0x0103
0x0005 0x0104
Table seven
The PMT1i of PAT1 correspondence (wherein, i is an integer, 1≤i≤N) be defined as:
Figure G2009101075593D00111
Table eight
Wherein, PMT1i (wherein, i is an integer, and the table_id of 1≤i≤N) is the 0x02 by the DVB standard definition, because PMT1i (wherein, i is an integer, 1≤i≤N) be still corresponding transport stream 1, and its transport_stream_id is 0x00 according to top agreement.
A PAT can be corresponding to a plurality of pmt tables, have what programs how many pmt tables are just arranged in the transport stream.Transport stream 1 hypothesis of this embodiment only has a programs (simply being example), program_number field among the PMT1 is just corresponding to the program_number of PAT1 standard to describe like this, in the present embodiment, because the number of program is N, so the numbering of PMT1i is respectively 0x000i (wherein, i is an integer, 1≤i≤N).
The SDT1 of transport stream 1 correspondence is defined as follows:
Figure G2009101075593D00121
Table nine
Wherein, the table of SDT1 sign table_id is fixing 0x42, because the transport stream of SDT1 correspondence is a transport stream 1, therefore, according to the regulation of front, its transport stream identification transport_stream_id is 0X00.
In the main transport stream of definition, behind each program description table of corresponding transport stream 1, determine the program description table of transport stream 2 and transport stream 3 correspondences below:
Definition according to the DVB standard, a transport stream is merely able to comprise a pat table, in order in main transport stream (being transport stream 1), to transmit other transport stream (in this example, be transport stream 2 and transport stream 3) the program description table of correspondence, the embodiment of the invention need adopt the mode of Extended Protocol, pat table for transport stream 2 correspondences, adopt PAT other1 to be described, owing in a transmission, only have a pat table, corresponding its table sign table_id also is the 0X00 that is that fixes, therefore, the PAT (that is: PAT other1) of definition transport stream 2 in transport stream 1 need reassign table sign table_id for PAT other1, considers also have user-defined table sign in the table two, therefore, specifying the table sign table_id of PAT other1 is 0X80, and in addition, the transport stream identification transport_stream_id of transport stream 2 correspondences can be defined as 0X01 (corresponding transport stream 2), therefore, the PAT other1 that obtains transport stream 2 correspondences sees the following form:
Figure G2009101075593D00122
Table ten
The PMT2i of PAT other1 correspondence (wherein, i is an integer, and 1≤i≤N) table sees the following form:
Figure G2009101075593D00123
Table ten one
PMT2i (wherein, i is an integer, the table_id among 1≤i≤N) keep with the PMT1i of transport stream 1 (wherein, i is an integer, 1≤i≤N) identical, its transport stream identification transport_stream_id is 0X01, what expression was corresponding is transport stream 2.Because the hypothesis of front, transport stream 2 comprises N program, and therefore, the span of its Program_number is that (wherein, i is an integer to 0x000i, 1≤i≤N).
The SDT other1 of transport stream 2 correspondences is positioned such that table:
Figure G2009101075593D00131
Table ten two
Wherein, the table_id of SDT other1 reassign into 0X46 (corresponding in the table two to the appointment of SDT other), its transport stream identification transport_stream_id is 0X01 (representing that this SDT other1 is corresponding transport stream 2).
Equally, (wherein, i is an integer, and 1≤i≤N) and SDT other2 can define with reference to the definition mode of transport stream 2 and (be respectively PAT other2, PMT2i (wherein corresponding to PAT other2, the PMT3i of transport stream 3, i is an integer, 1≤i≤N), SDT other2):
Figure G2009101075593D00132
Table ten three
In order to save the User Defined sign of table_id, can adopt the expansion DVB table of the transport stream 3 identical definition mode of (be PAT other1 and PAT other2, and SDT other1 and SDT other2) with the table_id that the expansion DVB of transport stream 2 shows.
Figure G2009101075593D00141
Table ten four
PMT3i (wherein, i is an integer, and (wherein, i is an integer for the table_id in the table of 1≤i≤N) and the PMT2i of transport stream 2, table_id in the table of 1≤i≤N) is identical, and (table_id of promptly all PMT is identical, be 0x02), its transport_stream_id represents corresponding transport stream 3 this moment, Program_number wherein comprises N program according to the hypothesis transport stream 3 of front, therefore, (wherein, i is an integer to the 0x000i that is numbered of its Program_number, 1≤i≤N).
Table ten five
Table_id in the SDT other2 table is identical with table_id in the SDT other1 of transport stream 2 table, and its transport_stream_id represents corresponding transport stream 3 at this moment.
202, terminal equipment obtains a plurality of transport stream that the network side headend equipment issues;
In performing step 202, need be by resolving the NIT table that the network side headend equipment issues, therefrom obtain the transport stream identification of corresponding each transport stream, according to the sign of the transport stream that obtains, determine the transport stream that the network side headend equipment issues, in this example, owing to comprise three transport stream, obtain the sign of transport stream by NIT table, promptly transport_stream_id is respectively 0x00,0x01,0x02, receives three transport stream according to transport stream identification.
203, terminal equipment is adjusted to the dominant frequency point by the tuner with self in the transport stream that described network side headend equipment issues, and determines main transport stream;
Implementing in 203, the value that described dominant frequency point is set to fix by Virtual network operator, the provider of terminal software can be realizing full automatic program searching process in this value write-in program, perhaps, by operator when the user installation terminal equipment by oral numerical value of telling user's dominant frequency point, the mode of specification that can also be by being documented in terminal equipment is informed the user, in addition, can also in the NIT table that issues to terminal equipment, carry the numerical value of dominant frequency point by the network side headend equipment, certainly, in order to guarantee the reliability of network, by planning a plurality of dominant frequency points, when a dominant frequency point is not an effective dominant frequency point, perhaps the tuner of set-top box can not be accurately be tuned to during some dominant frequency points owing to be provided with a plurality of dominant frequency points, can proceed the tuning of other dominant frequency points.
In the present embodiment, wherein a kind of by top several modes, terminal equipment determines that main transport stream is a transport stream 1, and the tuner by terminal inner carries out tuning, and locking dominant frequency point just can receive the data of main transport stream;
204, terminal equipment packages to the packet that receives from main transport stream, and will extract the program description of the transport stream correspondence that the network equipment of corresponding main transport stream transmission issues by the bag of organizing;
In the process of enforcement 204, because the network side of DVB system, be that headend equipment sends the form of all data by packet, in the STB terminal side, package by the packet that dominant frequency point is corresponding and to obtain corresponding program description table, determine the program description of each transport stream correspondence, in an embodiment, just need to determine the PAT1 of transport stream 1 (promptly main transport stream) correspondence, PMT1i (wherein, i is an integer, 1≤i≤N), SDT1 determines the PAT other1 of non-main transport stream correspondences such as transport stream 2 and transport stream 3, PMT2i (wherein, i is an integer, 1≤i≤N), SDT other1; And PA other2, PMT3i (wherein, i is an integer, 1≤i≤N), SDT other2.
Behind the program description table of the corresponding program of corresponding a plurality of transport stream that 205, in obtaining main transport stream, carries, carry out the search of program according to described program description.
In performing step 205, because after extraction obtains the program description table, in an embodiment, by corresponding PAT1, the PMT1i of the transport stream 1 (promptly main transport stream) that obtains (wherein, i is an integer, 1≤i≤N), SDT1, and the PATother1, the PMT2i that determine non-main transport stream correspondences such as transport stream 2 and transport stream 3 are (wherein, i is an integer, 1≤i≤N), SDT other1; And PAT other2, PMT2i (wherein, i is an integer, and 1≤i≤N), SDT other2 search for program, carries out concrete search procedure and belongs to prior art owing to obtain these tables, as space is limited, this is repeated no more.
Need to prove that some steps are not explained accordingly in the present embodiment, these steps just can realize by previous embodiment and corresponding prior art for those of ordinary skill in the art, therefore, not repeat them here.
Be appreciated that, in each embodiment of the present invention, adopt the program description of a plurality of transport stream correspondences that main transport stream transmission network side headend equipment issues, described " a plurality of " can comprise the network side headend equipment all transport stream that can issue, because the network side headend equipment may have different broadcast strategies, be that the network side headend equipment may have different broadcast programs to different terminal user, corresponding transport stream is also just inequality, at this, those skilled in the art may be according to " a plurality of " without the understanding that creatively has other, and the present invention does not do qualification to this.
Adopt the technical scheme of the embodiment of the invention, by at transport stream (TS that network side transmitted, at least one main transport stream is set Transport Stream), described at least one main transport stream is not only transmitted the program description and the programme content of this transport stream correspondence, the program description of other transport stream that also subsidiary transmission and this main transport stream together issue, make after user terminal receives the transport stream that is issued by the network side front end, by finding described main transport stream, therefrom can get access to the program description of the program correspondence in all transport stream that the network side headend equipment issues easily, the whole search procedure of subscriber terminal equipment only need be carried out once like this, just can search the descriptor of all programs, make that the process of whole search is simpler, and time loss seldom.
System embodiment
System embodiment of the present invention can describe by accompanying drawing 5
A kind of program search device with reference to figure 5, comprising: network side headend equipment 510, network 520, at least one terminal equipment 530; Wherein, network side headend equipment 510, be used for selecting at least one transport stream arbitrarily from transport stream waiting for transmission, as main transport stream, the program description of a plurality of transport stream correspondences of the required transmission of network side is set in described at least one main transport stream of determining, wherein said a plurality of transport stream comprises main transport stream and other transport stream except that described main transport stream, and described main transport stream and other transport stream except that described main transport stream of comprising are transferred to terminal equipment 530 by network 520; At least one terminal equipment 530, be used to obtain the main transport stream that network side headend equipment 510 issues, comprise the program description of the described main transport stream that network side headend equipment 510 issues and the program description of other transport stream except that described main transport stream in the described main transport stream, from described main transport stream, extract described main transport stream that described network side headend equipment 510 issues and the program description of removing the program that other transport stream comprise of described main transport stream, and carry out program searching according to the program description of described extraction.
Adopt the technical scheme of the embodiment of the invention, by at least one main transport stream is set in a plurality of transport stream that network side transmitted, described at least one main transport stream is not only transmitted the program description and the programme content of this transport stream correspondence, the program description of other transport stream that also subsidiary transmission and this main transport stream together issue, make after user terminal receives the transport stream that is issued by the network side front end, by finding described main transport stream, therefrom can get access to the program description of the program correspondence in all transport stream that the network side headend equipment issues easily, the whole search procedure of subscriber terminal equipment only need be carried out once tuning like this, just can search the descriptor of all programs, make that the process of whole search is simpler, and time loss seldom.
Apparatus embodiments
Apparatus embodiments 1
A kind of network side headend equipment 510 with reference to figure 6, comprising:
Determining unit 511 is used for selecting at least one transport stream arbitrarily from transport stream waiting for transmission, as main transport stream;
Wherein, described determining unit 511 can be provided with fixing frequency values by Virtual network operator and (for example: 291MHZ) obtain, and inform the user by mode oral or that write on specification by operator, the provider of terminal software can be realizing full automatic program searching process in this value write-in program; The dominant frequency point can also not preestablish fixed value, and is the dominant frequency point by operator's at least one frequency of mark in its NIT that issues table.In order to guarantee the reliability of network, by planning a plurality of dominant frequency points, when a dominant frequency point is not an effective dominant frequency point, perhaps the tuner of set-top box can not be accurately be tuned to during some dominant frequency points, owing to be provided with a plurality of dominant frequency points, can proceed the tuning of other dominant frequency points, adopt the mode of dominant frequency point backup like this, strengthen the reliability of program description search greatly.
Unit 512 is set, is used in described at least one main transport stream of determining comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream being set according to determining unit 511;
Corresponding program description in described a plurality of transport stream that the required transmission of network side headend equipment is set in described at least one main transport stream of determining comprises:
Show to realize that by PAT other table, pmt table and the SDT other that in a described main transport stream at least, broadcasts the program description that has other transport stream its implementation procedure can be with reference to the process of this specification method embodiment 2.
Transmission unit 513 is used for described all transport stream of described at least one main transport stream that comprise are transferred to terminal equipment by network 520.
This apparatus embodiments is by transmitting the program description of other transport stream by main transport stream, can make terminal equipment like this after receiving main transport stream, just can by be tuned to the name a person for a particular job descriptor of all transport stream of dominant frequency obtain, and then can make terminal equipment can search for program faster.
Apparatus embodiments 2
Present embodiment provides a kind of terminal equipment, and with reference to figure 7, described terminal equipment 530 comprises:
Acquiring unit 531, be used to obtain the main transport stream that network side headend equipment 510 issues, comprise the program description of other transport stream except that described main transport stream in the program description of the described main transport stream that network side headend equipment 510 issues and the described a plurality of transport stream in the described main transport stream;
Wherein, acquiring unit 531 receives the main transport stream that network side headend equipment 510 issues from network 520; Main transport stream wherein is the transport stream of corresponding dominant frequency point, the value that corresponding dominant frequency point is set to fix by Virtual network operator, and inform the user by mode oral or that write on specification by operator, the provider of terminal software can be realizing full automatic program searching process in this value write-in program; Can also not preestablish, and be the dominant frequency point by operator's at least one frequency of mark in its NIT that issues table.Determine that the process of main transport stream can specify by transport stream identification by network side headend equipment 510, also can be by the agreement of network side headend equipment with terminal equipment, setting in the time of can also be according to the dispatching from the factory of terminal equipment.
Extraction unit 532 is used for extracting the described main transport stream that described network side headend equipment 510 issues and the program description of other transport stream correspondence programs except that described main transport stream from described main transport stream;
Wherein, after the acquiring unit 531 of terminal equipment has been determined dominant frequency point, from the described program description that obtains, extract the program description of the corresponding programs of a plurality of transport stream that the network side headend equipment issues by extraction unit 532.
Search unit 533 is used for carrying out program searching according to the program description of described extraction.
Wherein, the program description that search unit 533 utilizes extraction unit 532 to obtain is carried out program searching, because the search that utilizes program description to carry out program belongs to prior art, does not repeat them here.
Apparatus embodiments 3
On the basis of apparatus embodiments 2, described acquiring unit 531 comprises:
Receive subelement 5311, be used to receive the transport stream that the network side headend equipment issues;
Determine subelement 5312, be used for receiving the transport stream that obtains from described network side, determine main transport stream according to receiving subelement.
Describe for example by following in the process of determining subelement 5312 definite main transport stream from the transport stream that the network side headend equipment issues:
(1) the corresponding dominant frequency point value that is set to fix by Virtual network operator, and inform the user by mode oral or that write on specification by operator, for example: operator is imprinted on this main frequency point information in the specification of terminal equipment, perhaps the service technician of operator is when being user installation and debug terminal equipment, inform the user by vival voice, the user is when knowing the numerical value of dominant frequency point like this, in the process of carrying out program searching, utilize and determine subelement 5312, tuner is tuned to the dominant frequency point, and then finishes determining of main transport stream;
(2) the definite mode that can also utilize described definite subelement 5312 by web search NIT table of main transport stream is determined main transport stream according to the transport stream identification in the transport stream list of NIT table.
(3) packet header of determining to utilize the transport stream of determining that subelement 5312 issues according to the network side headend equipment of main transport stream is represented, the sign of corresponding main transport stream is write in the corresponding transport stream, for example: in the main transport stream of the relevant position, packet header of transport stream 1 sign, and the transport stream of relevant position 0 is other transport stream, determine the sign of subelement 5312, determine main transport stream according to each transport stream packet header.
Extraction unit 532 is used for extracting the described main transport stream that described network side headend equipment 510 issues and the program description of other transport stream correspondence programs except that described main transport stream from described main transport stream;
Wherein, after the acquiring unit 531 of terminal equipment has been determined dominant frequency point, from the described program description that obtains, extract the program description of the corresponding programs of a plurality of transport stream that the network side headend equipment issues by extraction unit 532.
Search unit 533 is used for carrying out program searching according to the program description of described extraction.
Wherein, the program description of utilizing extraction unit 533 to obtain is carried out program searching, because the search that utilizes program description to carry out program belongs to prior art, does not repeat them here.
The terminal equipment that present embodiment provides can be surveyed the transport stream that headend equipment sends according to the network that receives from network, fast be tuned to the dominant frequency point, and then, can make terminal equipment search corresponding program faster by the program description that finds all transport stream correspondences that the dominant frequency point can be very fast.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (16)

1. the method for a program searching is characterized in that, described method comprises:
Obtain the main transport stream that the network side headend equipment issues, comprise the described main transport stream that the network side headend equipment issues and the program description of the corresponding programs of other transport stream except that described main transport stream in the described main transport stream;
The program description of described main transport stream that the described network side headend equipment of extraction issues from described main transport stream and the corresponding programs of other transport stream except that described main transport stream;
Program description according to described extraction is carried out program searching.
2. method according to claim 1 is characterized in that, describedly obtains the main transport stream that the network side headend equipment issues and comprises:
From the transport stream that the network side headend equipment issues, determine described main transport stream.
3. method according to claim 2 is characterized in that, and is described from the transport stream that the network side headend equipment issues, and determines that main transport stream comprises:
Inform the mode of terminal equipment in advance by operator, determine the main transport stream in the transport stream that described network side headend equipment issues.
4. method according to claim 2 is characterized in that, and is described from the transport stream that the network side headend equipment issues, and determines that main transport stream comprises:
The information that issues by described network side headend equipment is determined the main transport stream in the transport stream that described network side headend equipment issues.
5. method according to claim 4 is characterized in that, the described information that issues by the network side headend equipment is to adopt the mode of network information table to issue.
6. method according to claim 1, it is characterized in that, the described described main transport stream that the described network side headend equipment of extraction issues from described main transport stream and the program description of the program that other transport stream comprise except that described main transport stream comprise:
From described main transport stream, obtain network information table;
Determine the described main transport stream that described network side headend equipment issues and the transport stream identification information of other transport stream except that described main transport stream according to described network information table;
Determine the program description of described main transport stream and other transport stream correspondences except that described main transport stream according to the described transport stream identification that obtains.
7. according to claim 1 or 6 described methods, it is characterized in that the program description of described main transport stream and other transport stream correspondences except that described main transport stream comprises:
Corresponding to Program Association Table, Program Map Table, the SDT Service Description Table of main transport stream, and corresponding to Program Association Table, Program Map Table and the SDT Service Description Table of other transport stream except that described main transport stream.
8. method according to claim 7 is characterized in that, in the program description of described other transport stream correspondences except that described main transport stream, comprising:
The Program Association Table of other transport stream except that main transport stream that the map network side headend equipment that the mode by protocol extension obtains issues.
9. the transmission method of a network side program description is characterized in that, comprising:
From transport stream waiting for transmission, select at least one transport stream, as main transport stream;
Comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream is set in described at least one main transport stream of determining;
Give subscriber terminal equipment with described main transport stream and other transport stream except that described main transport stream of comprising by Network Transmission.
10. method according to claim 9, it is characterized in that, described comprising of the required transmission of network side of the main transport stream and the program description of other transport stream correspondences except that described main transport stream that is provided with in described at least one main transport stream of determining comprises:
Realize by Program Association Table, Program Map Table and the SDT Service Description Table that in a described main transport stream at least, carries the program description of other transport stream except that described main transport stream.
11. a terminal equipment is characterized in that, comprising:
Acquiring unit, be used to obtain the main transport stream that the network side headend equipment issues, comprise the program description of other transport stream except that described main transport stream in the program description of the described main transport stream that the network side headend equipment issues and the described a plurality of transport stream in the described main transport stream;
Extraction unit is used for extracting the described main transport stream that described network side headend equipment issues and the program description of other transport stream correspondence programs except that described main transport stream from described main transport stream;
Search unit is used for carrying out program searching according to the program description of described extraction.
12. terminal equipment according to claim 11 is characterized in that, described acquiring unit comprises:
Receive subelement, be used to receive the transport stream that the network side headend equipment issues;
Determine subelement, be used for receiving the transport stream that obtains from described network side, determine main transport stream according to receiving subelement.
13. terminal equipment according to claim 11 is characterized in that, the program description of described main transport stream that described network side headend equipment issues and the program that other transport stream comprise except that described main transport stream comprises:
Corresponding to Program Association Table, Program Map Table, the SDT Service Description Table of main transport stream, and corresponding to other transport stream except that described main transport stream through the expansion Program Association Table, Program Map Table, SDT Service Description Table.
14. a network side headend equipment is characterized in that, comprising:
Determining unit is used for selecting at least one transport stream from transport stream waiting for transmission, as main transport stream;
The unit is set, is used for comprising of the required transmission of network side of main transport stream and the program description of other transport stream correspondences except that described main transport stream being set in described at least one main transport stream of determining;
Transmission unit is used for giving terminal equipment with described main transport stream and other transport stream except that described main transport stream of comprising by Network Transmission.
15. network side headend equipment according to claim 14, it is characterized in that, described in described at least one main transport stream of determining, be provided with comprising of the required transmission of network side main transport stream and other transport stream except that described main transport stream in the program description of correspondence, comprising:
Realize by Program Association Table, Program Map Table and the SDT Service Description Table that in a described main transport stream at least, carries the program description of other transport stream except that described main transport stream.
16. a program search device is characterized in that, described system comprises:
The network side headend equipment, be used for selecting at least one transport stream arbitrarily from transport stream waiting for transmission, as main transport stream, the program description of a plurality of transport stream correspondences of the required transmission of network side is set in described at least one main transport stream of determining, wherein said a plurality of transport stream comprises main transport stream and other transport stream except that described main transport stream, gives terminal equipment with described main transport stream and other transport stream except that described main transport stream of comprising by Network Transmission;
At least one terminal equipment, be used to obtain the main transport stream that the network side headend equipment issues, comprise the program description of the described main transport stream that the network side headend equipment issues and the program description of other transport stream except that described main transport stream in the described main transport stream, from described main transport stream, extract described main transport stream that described network side headend equipment issues and the program description of removing the program that other transport stream comprise of described main transport stream, and carry out program searching according to the program description of described extraction.
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