CN105025346B - The acquisition methods and system of digital television program parameter - Google Patents
The acquisition methods and system of digital television program parameter Download PDFInfo
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- CN105025346B CN105025346B CN201510429098.7A CN201510429098A CN105025346B CN 105025346 B CN105025346 B CN 105025346B CN 201510429098 A CN201510429098 A CN 201510429098A CN 105025346 B CN105025346 B CN 105025346B
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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]
- H04N21/40—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
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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]
- H04N21/40—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
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
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- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of acquisition methods of digital television program parameter, comprising: the playing request or searching request of terminal reception TV programme；Load the SDT Service Description Table SDT of current frequency point；Parse the SDT, obtain the first program parameter that current frequency point corresponds to program, to carry out corresponding program broadcasting or program searching operation according to first program parameter, first program parameter is including at least audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.The invention also discloses a kind of acquisition systems of digital television program parameter.The present invention is by being arranged the audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier of program into SDT Service Description Table SDT, so that the program searching of DTV and broadcasting are no longer dependent on Program Association Table PAT and Program Map Table PMT, and then improve the acquisition efficiency of program parameter, maintenance cost is reduced, while also improving the competitiveness of product in market.
Description
Technical field
The present invention relates to the acquisition methods and system of digital TV technology more particularly to digital television program parameter.
Background technique
The existing DTV system based on DVB (Digital Video Broadcasting, digital video broadcasting) standard
Program searching and the program broadcasting of system are all necessarily dependent upon PSI (Program Specific Information, the specific letter of program
Breath) in PAT (Program Associate Table, Program Association Table) and PMT (Program Mapping Table, save
Mesh mapping table), to obtain the program parameter of respective program, such as Audio PID (Packet Identifier, PID Packet Identifier), view
Frequency PID, Program Clock Reference PID etc., but the execution step of the acquisition program parameter of such mode is more, to increase acquisition
The time overhead of program parameter, while the subsequent maintenance cost for digital television system is also increased, to be unfavorable for improving
The competitiveness of product in market.
Summary of the invention
The main purpose of the present invention is to provide the acquisition methods and system of a kind of digital television program parameter, it is intended to solve
The technical issues of how improving the acquisition efficiency of program parameter, while reducing the maintenance cost of digital television system.
To achieve the above object, the acquisition methods of a kind of digital television program parameter provided by the invention, the number electricity
Acquisition methods depending on program parameter include:
S1, terminal receive the playing request or searching request of TV programme；
The SDT Service Description Table SDT of S2, the current frequency point of load；
S3, the parsing SDT, obtain the first program parameter that current frequency point corresponds to program, according to first program
Parameter carries out corresponding program broadcasting or program searching operation, and first program parameter includes at least audio PID Packet Identifier, view
Frequency PID Packet Identifier, Program Clock Reference PID Packet Identifier.
Preferably, it is applied to program to play, includes: before the SDT Service Description Table SDT of the current frequency point of load
The terminal joins the second program searched saved in default programme information library according to the playing request
Number is sent in audio/video decoder so that for carrying out program broadcasting, the second program parameter is identified including at least audio pack
Symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
The parsing SDT, obtain current frequency point and correspond to first program parameter of program include: later
The terminal respectively corresponds the audio PID Packet Identifier judged in first program parameter, video PID Packet Identifier, section
When audio PID Packet Identifier in mesh reference clock PID Packet Identifier and the second program parameter, video PID Packet Identifier, program reference
It is identical whether clock PID Packet Identifier all corresponds to；
If it is not, then sending first program parameter in the audio/video decoder to be used to carry out the program and broadcast
It puts.
Preferably, it is applied to program searching, the parsing SDT obtains the first program that current frequency point corresponds to program
Include: after parameter
First program parameter is saved in default program information database by S4, the terminal；
S5, next frequency point is set as current frequency point, repeats S2-S4, until completing the search of all frequency points.
Preferably, the terminal receives the playing request of TV programme or searching request includes: before
Front end generates the corresponding data section of default description of the SDT table；
Third program parameter corresponding to each program is obtained, the third program parameter is identified including at least audio pack
Symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
According to predefined data encapsulation format, the third program parameter insertion corresponding to each program that will acquire
In the corresponding data section of default description of the corresponding SDT table and carry out data encapsulation；
It will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate and give the terminal.
Preferably, the SDT Service Description Table SDT of the current frequency point of load includes:
The terminal locks current frequency point to obtain frequency point information；
According to the PID Packet Identifier and table identifier of the preset SDT, the frequency point information is filtered to obtain the SDT；
The parsing SDT, obtain current frequency point and correspond to the first program parameter of program include:
According to the preset mark of default description, the SDT is filtered to obtain default description；
It according to the data encapsulation format, parses that the default description is sub, obtains current frequency point corresponds to program described the
One program parameter.
Further, to achieve the above object, the present invention also provides a kind of acquisition system of digital television program parameter, packets
Terminal is included, the terminal includes:
Request receiving module, for receiving the playing request or searching request of TV programme；
Loading module, for loading the SDT Service Description Table SDT of current frequency point；
Parsing module obtains the first program parameter that current frequency point corresponds to program, according to institute for parsing the SDT
It states the first program parameter and carries out corresponding program broadcasting or program searching operation, first program parameter is including at least audio pack
Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
Preferably, it is applied to program to play, the request receiving module includes:
Playing request receiving unit, for receiving the playing request of TV programme；
The terminal further include:
The first sending module of program parameter, for will be saved in default programme information library according to the playing request
The second program parameter searched is sent in audio/video decoder so that for carrying out program broadcasting, the second program parameter is extremely
It less include audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Judgment module, for respectively corresponding the audio PID Packet Identifier judged in first program parameter, video bag mark
Audio PID Packet Identifier, video PID Packet Identifier, program in symbol, Program Clock Reference PID Packet Identifier and the second program parameter are joined
Examine clock PID Packet Identifier whether all correspond to it is identical；
The second sending module of program parameter, for when audio PID Packet Identifier, the video bag mark in first program parameter
Know audio PID Packet Identifier, the video PID Packet Identifier, program in symbol, Program Clock Reference PID Packet Identifier and the second program parameter
When reference clock PID Packet Identifier is without all corresponding to identical, send first program parameter in the audio/video decoder
For carrying out the program broadcasting.
Preferably, it is applied to program searching, the request receiving module further include:
Searching request receiving unit, for receiving the searching request of TV programme；
The terminal further include:
Program parameter preserving module, for first program parameter to be saved in default program information database；
Frequency point setting module, for next frequency point to be set as current frequency point.
It preferably, further include front end, the front end includes:
Generation module, the corresponding data section of default description for generating the SDT table；
Module is obtained, for obtaining third program parameter corresponding to each program, the third program parameter is at least wrapped
Include audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Package module, for according to predefined data encapsulation format, described the corresponding to each program that will acquire
In the corresponding data section of default description of the corresponding SDT table of three program parameters insertion and carry out data encapsulation；
Sending module gives institute for that will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate
State terminal.
Preferably, the loading module includes:
Frequency locking unit, for lockking current frequency point to obtain frequency point information；
First filter element filters the frequency point letter for the PID Packet Identifier and table identifier according to the preset SDT
Breath is to obtain the SDT；
The parsing module includes:
Second filter element, for the preset mark according to default description, it is described pre- to obtain to filter the SDT
If description；
Resolution unit, for parsing default description, it is corresponding obtaining current frequency point according to the data encapsulation format
First program parameter of program.
The present invention is by the way that the audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier of program to be arranged
Into SDT Service Description Table SDT so that the program searching of DTV and broadcasting be no longer dependent on Program Association Table PAT and
Program Map Table PMT, and then improve the acquisition efficiency of program parameter, enhances user experience, and also reduce maintenance at
This.Simultaneously further, the R&D cycle to digital TV terminal software is also shortened, to improve the market competition of product
Power.
Detailed description of the invention
Fig. 1 is the flow diagram of the acquisition methods first embodiment of digital television program parameter of the present invention；
Fig. 2 is the flow diagram of the acquisition methods second embodiment of digital television program parameter of the present invention；
Fig. 3 is the flow diagram of the acquisition methods 3rd embodiment of digital television program parameter of the present invention；
Fig. 4 is the flow diagram of the acquisition methods fourth embodiment of digital television program parameter of the present invention；
Fig. 5 is the refinement flow diagram of step S2 and S3 in Fig. 1；
Fig. 6 is the functional block diagram of the acquisition system first embodiment of digital television program parameter of the present invention；
Fig. 7 is the functional block diagram of the acquisition system second embodiment of digital television program parameter of the present invention；
Fig. 8 is the functional block diagram of the acquisition system 3rd embodiment of digital television program parameter of the present invention；
Fig. 9 is the functional block diagram of the acquisition system fourth embodiment of digital television program parameter of the present invention；
Figure 10 is the refinement the functional block diagram of loading module in Fig. 6；
Figure 11 is the refinement the functional block diagram of parsing module in Fig. 6.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that described herein, specific examples are only used to explain the present invention, is not intended to limit the present invention.
Referring to Fig.1, Fig. 1 is the flow diagram of the acquisition methods first embodiment of digital television program parameter of the present invention.
In the present embodiment, the acquisition methods of the digital television program parameter include:
Step S1, terminal receives the playing request or searching request of TV programme；
Step S2, the SDT Service Description Table SDT of current frequency point is loaded；
Step S3, the SDT is parsed, the first program parameter that current frequency point corresponds to program is obtained, according to described first
Program parameter carries out corresponding program broadcasting or program searching operation, first program parameter are identified including at least audio pack
Symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
In the present embodiment, terminal refers specifically to television programme reception end, such as DTV STB, DTV one
Machine, hand held television terminal etc..It should be noted that terminal both can receive the playing request of TV programme, electricity also can receive
Depending on the searching request of program.In addition, MPEG-2 program transmission standard is based on, generally by multiple and different frequency points to transmit not
Co-channel corresponding programme information.
When receiving the playing request or searching request of TV programme, the SDT Service Description Table of the current frequency point of terminal loads
SDT includes the program parameter of current frequency point, such as audio PID Packet Identifier, video PID Packet Identifier, the section of program in the SDT table
Mesh reference clock PID Packet Identifier and program category, programm name etc..Current frequency point can be obtained by parsing the SDT table in terminal
The above-mentioned program parameter of corresponding program, so as to carry out corresponding program broadcasting or program searching behaviour according to the first program parameter
Make.It should be noted that using the first program in the present embodiment for convenient for distinguishing with the program parameter in subsequent embodiment
Parameter is distinguished namely the first program parameter is identical as parameter type included by program parameter.By obtaining above-mentioned program
Parameter can carry out the broadcasting of program.
The acquisition of the program parameter of the existing DTV based on DVB standard is necessarily dependent upon Program Specific Information PSI
In Program Association Table PAT and Program Map Table PMT, namely carrying out program broadcasting or when program searching, needing to first pass through
Pat table loads Program Map Table PMT, then obtains audio PID Packet Identifier, video PID Packet Identifier, program ginseng by parsing pmt table
Examine clock PID Packet Identifier.
In the present embodiment, due to audio PID Packet Identifier, the video bag mark of the program parameter of current frequency point, such as program
Symbol, Program Clock Reference PID Packet Identifier etc. are set in SDT table, therefore, only can need to directly be obtained by loading and parsing SDT table
The program parameter of current frequency point is obtained, so that the program searching of DTV and broadcasting are no longer dependent on Program Association Table PAT
And Program Map Table PMT, and then the acquisition efficiency of program parameter is improved, user experience is enhanced, and also reduce dimension
Protect cost.Simultaneously further, the R&D cycle to digital TV terminal software is also shortened, to also improve the city of product
Field competitiveness.
It is the flow diagram of the acquisition methods second embodiment of digital television program parameter of the present invention referring to Fig. 2, Fig. 2.
The program that the present embodiment is applied to DTV plays, and includes: before above-mentioned steps S2
Step S110, the described terminal is according to the playing request, by having searched of saving in default programme information library
Second program parameter is sent in audio/video decoder so that for carrying out program broadcasting, the second program parameter includes at least sound
Frequency PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Include: after step S3
Step S120, the described terminal respectively corresponds the audio PID Packet Identifier judged in first program parameter, video bag
Audio PID Packet Identifier, video PID Packet Identifier, section in identifier, Program Clock Reference PID Packet Identifier and the second program parameter
It is identical whether mesh reference clock PID Packet Identifier all corresponds to；
Step S130, if it is not, then sending first program parameter in the audio/video decoder to be used to carry out
The program plays；If so, without any processing.
In the present embodiment, when terminal receives program playing request, terminal will be according to the program playing request, such as root
According to programm name, the program parameter for carrying out program searching before and searched saved is obtained from default programme information library,
Namely second program parameter, and the second program parameter obtained from programme information library is sent to audio/video decoder, sound view
Frequency decoder is according to the second program parameter received, such as audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference packet
Identifier can play the program of the programm name after being decoded to the audio-video packet in transport stream.
Further, due to will appear certain exceptions, such as packet loss, signal interruption etc. in program playing process, to lead
It causes the decoding of program broadcasting Caton or audio & video not synchronize, and then influences the viewing effect of user, therefore, be
Above-mentioned unusual condition is avoided the occurrence of, is needed while program plays, it is synchronous to obtain current newest program parameter, namely pass through
The SDT table of current frequency point is loaded, and is parsed, to obtain the first program parameter of actual program.Meanwhile it respectively corresponding and sentencing
Audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier and second program in disconnected first program parameter are joined
Audio PID Packet Identifier, video PID Packet Identifier in number, that whether Program Clock Reference PID Packet Identifier all corresponds to is identical；If so,
It is without any processing；And if it is not, namely at least there is a program parameter when not corresponding to consistent, then by the first program parameter
It is sent in audio/video decoder, so that audio/video decoder passes through the sound in transport stream corresponding to the first program parameter of decoding
Video bag, to continue the broadcasting of actual program.
It should be noted that for ease of explanation, by current by loading and parsing the program parameter obtained after SDT table
It is named as the first program parameter, and the program parameter obtained from program information database is named as second program parameter, but
The first program parameter in the present embodiment is identical as parameter type corresponding to second program parameter, all includes that audio pack identifies
Symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
It is the flow diagram of the acquisition methods 3rd embodiment of digital television program parameter of the present invention referring to Fig. 3, Fig. 3.
The present embodiment is applied to the program searching of DTV, includes: after above-mentioned steps S3
Step S4, first program parameter is saved in default program information database by the described terminal；
Step S5, next frequency point is set as current frequency point, repeats S2-S4, until completing the search of all frequency points.
In the present embodiment, when terminal receives program searching request, terminal will load the SDT table of current frequency point automatically,
And parse, to obtain the program parameter that current frequency point corresponds to program, wherein the program parameter in the present embodiment includes audio pack
Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier and program category, programm name etc..Meanwhile by above-mentioned section
Mesh parameter is saved in program information database for carrying out program broadcasting.For example, user passes through selection program category, and select
A programm name under middle the type, at this point, terminal will obtain correspondence and the programm name from program information database
Corresponding PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier, and be sent in audio/video decoder and carry out sound
Program broadcasting is carried out after the decoding of video bag.
After having searched for current frequency point, next frequency point of current frequency point is set as current frequency point by terminal, and repeats step
Rapid S2-S4, until completing the search of all frequency points.
In the present embodiment, when carrying out the whole network program searching, namely when carrying out the program parameter search of multiple frequency points, due to
Only the program parameter under current frequency point need to be can be obtained, so that the whole network program be greatly saved by loading and parsing SDT table
Search time improves user experience.
It is the flow diagram of the acquisition methods fourth embodiment of digital television program parameter of the present invention referring to Fig. 4, Fig. 4.
Based on the above embodiment, in the present embodiment, include: before step S1
Step S210, front end generate the corresponding data section of default description of the SDT table；
Step S220, obtains third program parameter corresponding to each program, and the third program parameter includes at least sound
Frequency PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Step S230, according to predefined data encapsulation format, the third section corresponding to each program that will acquire
In the corresponding data section of default description of the corresponding SDT table of mesh parameter insertion and carry out data encapsulation；
Step S240 will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate and give the end
End.
In the present embodiment, front end specifically refers to digital television program editor's transmitting terminal of digital-TV operator.General SDT
All be reserved in table undefined privately owned description in order to operator can be needed to carry out according to different business it is customized.Cause
This, front end can define privately owned customized description of program parameter information in SDT table with right for saving each program institute
The program parameter information answered.It should be noted that for ease of explanation, being used to carry out the program parameter that SDT is edited for front end
It is named as third program parameter, corresponding to the third program parameter in the present embodiment and the first program parameter, second program parameter
Parameter type it is identical, all include audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
The privately owned customized sub- example of description of program parameter information as shown in Table 1.Front end is according to data as described in Table 1
Program parameter information corresponding to each program is inserted into default description of corresponding SDT table by encapsulation format, while according to
SDT table be packaged processing to generate transmission flow data by Moving Picture Experts Group-2, and is sent to terminal.
Table 1
Wherein, the privately owned customized specific number for describing sub (user_defined_descriptor) of program parameter information
It is as follows according to format and field meanings:
1) descriptor_tag: description son label, 8 bytes, according to regulation value range (such as 0x80 to 0xFE).
2) sub- length, 8 bytes descriptor_length: are described.
3) PID of PCR_PID:PCR, for playing, 13 bytes.
4) reserved: reserved bit, 3 bytes or 4 bytes.
5) stream_type: program category, 8 bytes.
6) elementary_PID: the related-program element for including in transport stream, such as Audio PID or video PID, 13
A byte.
7) ES_info_length: the field indicates 12 words of byte number of description related-program element followed by
Section.It should be noted that above-described embodiment be only only intended to for example, described in above-mentioned table 1 son definition with specific reference to
Actual needs is configured.
In the present embodiment, front end when editing SDT table, according to digital video broadcasting-information on services (DVB-SI) standard and
The length of default description, generates the corresponding data section (section) of default description of SDT table, then from the editor of front end
Program parameter information corresponding to each program is obtained in database, and according to 1 corresponding data encapsulation format of table as above, will acquire
Each program corresponding to program parameter information default description that is inserted into corresponding SDT table corresponding data section in and sealed
Dress；Finally again will complete data encapsulation after SDT table be packaged generate transport stream Data Concurrent give terminal, thus terminal by plus
Program parameter can be directly obtained by carrying and parsing SDT table, so that the program searching of DTV is no longer dependent on broadcasting
Program Association Table PAT and Program Map Table PMT, and then the acquisition efficiency of program parameter is improved, user experience is enhanced, and
And also reduce maintenance cost.
It is the refinement flow diagram of step S2 and S3 in Fig. 1 referring to Fig. 5, Fig. 5.In the present embodiment, above-mentioned steps S2 packet
It includes:
Step S21, the described terminal locks current frequency point to obtain frequency point information；
Step S22, according to the PID Packet Identifier and table identifier of the preset SDT, the frequency point information is filtered to obtain
The SDT；
Above-mentioned steps S3 includes:
Step S31, according to the preset mark of default description, the SDT is filtered to obtain default description；
Step S32, according to the data encapsulation format, default description is parsed, current frequency point is obtained and corresponds to program
First program parameter.
Terminal needs first to carry out frequency locking processing when obtaining the data information in SDT table from transmission flow data, thus from
In transmission flow data in the frequency point of different channel, frequency point information corresponding to current frequency point is obtained, which includes SDT table
All data informations inside, therefore, it is necessary to be filtered place to the frequency point information according to the PID Packet Identifier and table identifier of SDT
Reason, to obtain and the PID Packet Identifier of SDT and table identifier SDT table.
Then, further according to the preset mark for presetting description in SDT table, the SDT is filtered to obtain the default description
Son；And according to the data encapsulation format of default description, default description is parsed, current frequency point is obtained and corresponds to the described of program
First program parameter.
In the present embodiment, only the program parameter of current frequency point need to can be directly obtained by loading and parsing SDT table, thus
So that the program searching of DTV and broadcasting are no longer dependent on Program Association Table PAT and Program Map Table PMT, and then improve
The acquisition efficiency of program parameter, enhances user experience, and also reduce maintenance cost, improves the market competition of product
Power.
Referring to the functional module signal that Fig. 6, Fig. 6 are the acquisition system first embodiment of digital television program parameter of the present invention
Figure.In the present embodiment, the acquisition system of digital television program parameter includes terminal 10；The terminal 10 includes:
Request receiving module 110, for receiving the playing request or searching request of TV programme；
Loading module 120, for loading the SDT Service Description Table SDT of current frequency point；
Parsing module 130 obtains the first program parameter that current frequency point corresponds to program, for parsing the SDT with basis
First program parameter carries out corresponding program broadcasting or program searching operation, first program parameter include at least audio
PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
In the present embodiment, terminal 10 refers specifically to television programme reception end, such as DTV STB, DTV one
Machine, hand held television terminal etc., and the terminal 10 has the playing function and function of search of TV programme simultaneously.
When request receiving module 110 receives the playing request or searching request of TV programme, loading module 120 is loaded
The SDT Service Description Table SDT of current frequency point includes the program parameter of current frequency point, such as the audio pack mark of program in the SDT table
Know symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier and program category, programm name etc..Pass through parsing module 130
Parsing the SDT table can be obtained the above-mentioned program parameter that current frequency point corresponds to program, so as to according to the first program parameter into
The corresponding program of row plays or program searching operation.It should be noted that for convenient for the program parameter in subsequent embodiment into
Row is distinguished, in the present embodiment using the first program parameter distinguished namely the first program parameter and program parameter included by
Parameter type is identical.The broadcasting of program can be carried out by obtaining above-mentioned program parameter.
The acquisition of the program parameter of the existing DTV based on DVB standard is necessarily dependent upon Program Specific Information PSI
In Program Association Table PAT and Program Map Table PMT, namely carrying out program broadcasting or when program searching, needing to first pass through
Pat table loads Program Map Table PMT, then obtains audio PID Packet Identifier, video PID Packet Identifier, program ginseng by parsing pmt table
Examine clock PID Packet Identifier.
In the present embodiment, due to audio PID Packet Identifier, the video bag mark of the program parameter of current frequency point, such as program
Symbol, Program Clock Reference PID Packet Identifier etc. are set in SDT table, therefore, only can need to directly be obtained by loading and parsing SDT table
The program parameter of current frequency point is obtained, so that the program searching of DTV and broadcasting are no longer dependent on Program Association Table PAT
And Program Map Table PMT, and then the acquisition efficiency of program parameter is improved, user experience is enhanced, and also reduce dimension
Protect cost.Simultaneously further, the R&D cycle to digital TV terminal software is also shortened, to also improve the city of product
Field competitiveness.
Referring to the functional module signal that Fig. 7, Fig. 7 are the acquisition system second embodiment of digital television program parameter of the present invention
Figure.The program that the present embodiment is applied to DTV plays, and the request receiving module 110 includes:
Playing request receiving unit 1101, for receiving the playing request of TV programme；
The terminal 10 further include:
The first sending module of program parameter 140 is used for according to the playing request, by what is saved in default programme information library
The second program parameter searched is sent in audio/video decoder for carrying out program broadcasting, the second program parameter
Including at least audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Judgment module 150, for respectively corresponding the audio PID Packet Identifier, the video bag mark that judge in first program parameter
Know audio PID Packet Identifier, the video PID Packet Identifier, program in symbol, Program Clock Reference PID Packet Identifier and the second program parameter
It is identical whether reference clock PID Packet Identifier all corresponds to；
The second sending module of program parameter 160, for when the audio PID Packet Identifier in first program parameter, video bag
Audio PID Packet Identifier, video PID Packet Identifier, section in identifier, Program Clock Reference PID Packet Identifier and the second program parameter
When mesh reference clock PID Packet Identifier is without all corresponding to identical, the audio/video decoder is sent by first program parameter
In with for carrying out the program broadcasting.
In the present embodiment, when playing request receiving unit 1101 receives program playing request, program parameter first is sent out
It send module 140 will be according to the program playing request, such as according to programm name, preservation it is obtained from default programme information library
It is preceding carry out program searching and the program parameter namely second program parameter that have searched, and will be obtained from programme information library
Second program parameter is sent to audio/video decoder, and audio/video decoder is according to the second program parameter received, such as audio
PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier, after being decoded to the audio-video packet in transport stream
Play the program of the programm name.
Further, due to will appear certain exceptions, such as packet loss, signal interruption etc. in program playing process, to lead
It causes the decoding of program broadcasting Caton or audio & video not synchronize, and then influences the viewing effect of user, therefore, be
Above-mentioned unusual condition is avoided the occurrence of, is needed while program plays, it is synchronous to obtain current newest program parameter, namely pass through
Loading module 120 loads the SDT table of current frequency point, and is parsed by parsing module 130, to obtain the of actual program
One program parameter.Meanwhile passing through corresponding audio PID Packet Identifier, the video judged in the first program parameter of judgment module 150 respectively
Audio PID Packet Identifier, video PID Packet Identifier, program in PID Packet Identifier, Program Clock Reference PID Packet Identifier and second program parameter
It is identical whether reference clock PID Packet Identifier all corresponds to；If so, without any processing；And if it is not, namely at least in the presence of one
When a program parameter does not correspond to consistent, then the first program parameter is sent to by sound by the second sending module of program parameter 160
In Video Decoder, so that audio/video decoder passes through the audio-video packet in transport stream corresponding to the first program parameter of decoding,
To continue the broadcasting of actual program.
It should be noted that for ease of explanation, by current by loading and parsing the program parameter obtained after SDT table
It is named as the first program parameter, and the program parameter obtained from program information database is named as second program parameter, but
The first program parameter in the present embodiment is identical as parameter type corresponding to second program parameter, all includes that audio pack identifies
Symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
Referring to the functional module signal that Fig. 8, Fig. 8 are the acquisition system 3rd embodiment of digital television program parameter of the present invention
Figure.The present embodiment is applied to the program searching of DTV, the request receiving module 110 further include:
Searching request receiving unit 1102, for receiving the searching request of TV programme；
The terminal 10 further include:
Program parameter preserving module 170, for first program parameter to be saved in default program information database；
Frequency point setting module 180, for next frequency point to be set as current frequency point.
In the present embodiment, when searching request receiving unit 1102 receives program searching request, loading module 120 will be certainly
The SDT table of the dynamic current frequency point of load, and parsed by parsing module 130, to obtain the section that current frequency point corresponds to program
Mesh parameter, wherein the program parameter in the present embodiment includes audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference packet
Identifier and program category, programm name etc..Meanwhile above-mentioned program parameter being saved by program parameter preserving module 170
Into program information database for carrying out program broadcasting.For example, user passes through selection program category, and choose under the type
A programm name, marked at this point, correspondence will be obtained corresponding with programm name packet by terminal from program information database
Know symbol, video PID Packet Identifier, Program Clock Reference PID Packet Identifier, and is sent to the solution for carrying out audio-video packet in audio/video decoder
Program broadcasting is carried out after code.
After having searched for current frequency point, next frequency point of current frequency point is set as current frequency point by frequency point setting module 180, and
Repeat the search of other channels, until completing the search of all frequency points.
In the present embodiment, when carrying out the whole network program searching, namely when carrying out the program parameter search of multiple frequency points, due to
Only the program parameter under current frequency point need to be can be obtained, so that the whole network program be greatly saved by loading and parsing SDT table
Search time improves user experience.
Referring to the functional module signal that Fig. 9, Fig. 9 are the acquisition system fourth embodiment of digital television program parameter of the present invention
Figure.In the present embodiment, the acquisition system of digital television program parameter further includes front end 20, and the front end 20 includes:
Generation module 210, the corresponding data section of default description for generating the SDT table；
Module 220 is obtained, for obtaining third program parameter corresponding to each program, the third program parameter is at least
Including audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier；
Package module 230, it is described corresponding to each program that will acquire for according to predefined data encapsulation format
In the corresponding data section of default description of the corresponding SDT table of third program parameter insertion and carry out data encapsulation；
Sending module 240 is given for that will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate
The terminal.
In the present embodiment, front end 20 specifically refers to digital television program editor's transmitting terminal of digital-TV operator.Generally
All be reserved in SDT table undefined privately owned description in order to operator can be needed to carry out according to different business it is customized.
Therefore, front end 20 can define privately owned customized description of program parameter information for saving each program in SDT table
Corresponding program parameter information.It should be noted that for ease of explanation, being used to carry out the section that SDT is edited for front end 20
Mesh parameter nomenclature is third program parameter, third program parameter and the first program parameter, second program parameter in the present embodiment
Corresponding parameter type is identical, all includes audio PID Packet Identifier, video PID Packet Identifier, Program Clock Reference PID Packet Identifier.
The privately owned customized sub- example of description of program parameter information as shown in Table 1 above.In the present embodiment, front end 20 exists
When editing SDT table, according to digital video broadcasting-information on services (DVB-SI) standard and the length of default description, pass through generation
Module 210 generates the corresponding data section (section) of default description of SDT table, then by obtaining module 220 from front end 20
Editor's database in obtain program parameter information corresponding to each program, meanwhile, by package module 230 according to such as above-mentioned
The corresponding data encapsulation format of table 1, program parameter information corresponding to each program that will acquire are inserted into the default of corresponding SDT table
It describes in the corresponding data section of son and is packaged, while sending module 240 carries out SDT table at packing according to Moving Picture Experts Group-2
Reason, to generate transmission flow data to be sent to terminal 10.
Figure 10 is the refinement the functional block diagram of loading module in Fig. 6.In the present embodiment, the loading module 120 is wrapped
It includes:
Frequency locking unit 1201, for lockking current frequency point to obtain frequency point information；
First filter element 1202 filters the frequency for the PID Packet Identifier and table identifier according to the preset SDT
Point information is to obtain the SDT；
Figure 11 is the refinement the functional block diagram of parsing module in Fig. 6.
The parsing module 130 includes:
Second filter element 1301 filters the SDT for the preset mark according to default description to obtain
State default description；
Resolution unit 1302, for parsing default description, obtaining current frequency point according to the data encapsulation format
First program parameter of corresponding program.
Terminal 10 is needed through frequency locking unit 1201 first when obtaining the data information in SDT table from transmission flow data
Frequency locking processing is carried out, thus from the frequency point of different channel, frequency point information corresponding to current frequency point is obtained in transmission flow data,
All data informations of the frequency point information including SDT table, therefore, the first filter element 1202 need the packet mark according to SDT
Know symbol and table identifier is filtered processing to the frequency point information, to obtain and the PID Packet Identifier of SDT and table identifier SDT
Table.
Then, the second filter element 1301 filters the SDT according to the preset mark for presetting description in SDT table to obtain
To default description；Resolution unit 1302 parses default description, obtains according to the data encapsulation format of default description
First program parameter of program is corresponded to current frequency point.
In the present embodiment, only the program parameter of current frequency point need to can be directly obtained by loading and parsing SDT table, thus
So that the program searching of DTV and broadcasting are no longer dependent on Program Association Table PAT and Program Map Table PMT, and then improve
The acquisition efficiency of program parameter, enhances user experience, and also reduce maintenance cost, improves the market competition of product
Power.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (8)
1. a kind of acquisition methods of digital television program parameter, which is characterized in that the acquisition side of the digital television program parameter
Method includes:
S1, terminal receive the playing request or searching request of TV programme；
When terminal receives the playing request of TV programme, the terminal is according to the playing request, by default programme information library
The second program parameter of middle preservation searched is sent in audio/video decoder with for carrying out program broadcasting, and described second
Program parameter includes at least audio PID Packet Identifier, video PID Packet Identifier and Program Clock Reference PID Packet Identifier；
The SDT Service Description Table SDT of S2, the current frequency point of load；
S3, the parsing SDT, obtain the first program parameter that current frequency point corresponds to program, according to first program parameter
It carries out corresponding program broadcasting or program searching operation, first program parameter includes at least audio PID Packet Identifier, video bag
Identifier and Program Clock Reference PID Packet Identifier；
The terminal respectively corresponds audio PID Packet Identifier, video PID Packet Identifier, the program ginseng judged in first program parameter
Examine audio PID Packet Identifier, the video PID Packet Identifier, Program Clock Reference packet in clock PID Packet Identifier and the second program parameter
It is identical whether identifier all corresponds to；
If it is not, then sending first program parameter in the audio/video decoder to be used to carry out the program broadcasting.
2. the acquisition methods of digital television program parameter as described in claim 1 are applied to program searching, which is characterized in that
The parsing SDT, obtain current frequency point and correspond to first program parameter of program include: later
First program parameter is saved in default program information database by S4, the terminal；
S5, next frequency point is set as current frequency point, repeats S2-S4, until completing the search of all frequency points.
3. the acquisition methods of digital television program parameter as claimed in claim 1 or 2, which is characterized in that the terminal receives
Include: before the playing request or searching request of TV programme
Front end generates the corresponding data section of default description of the SDT table；
Third program parameter corresponding to each program is obtained, the third program parameter includes at least audio PID Packet Identifier, view
Frequency PID Packet Identifier and Program Clock Reference PID Packet Identifier；
According to predefined data encapsulation format, the third program parameter insertion corresponding to each program that will acquire is corresponded to
In the corresponding data section of default description of the SDT table and carry out data encapsulation；
It will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate and give the terminal.
4. the acquisition methods of digital television program parameter as claimed in claim 3, which is characterized in that the current frequency point of load
SDT Service Description Table SDT include:
The terminal locks current frequency point to obtain frequency point information；
According to the PID Packet Identifier and table identifier of the preset SDT, the frequency point information is filtered to obtain the SDT；
The parsing SDT, obtain current frequency point and correspond to the first program parameter of program include:
According to the preset mark of default description, the SDT is filtered to obtain default description；
According to the data encapsulation format, default description is parsed, the first segment that current frequency point corresponds to program is obtained
Mesh parameter.
5. a kind of acquisition system of digital television program parameter, including terminal, which is characterized in that the terminal includes:
Request receiving module, for receiving the playing request or searching request of TV programme；
Loading module, for loading the SDT Service Description Table SDT of current frequency point；
Parsing module obtains the first program parameter that current frequency point corresponds to program, according to described for parsing the SDT
One program parameter carries out corresponding program broadcasting or program searching operation, first program parameter are identified including at least audio pack
Symbol, video PID Packet Identifier and Program Clock Reference PID Packet Identifier；
The request receiving module includes:
Playing request receiving unit, for receiving the playing request of TV programme；
The terminal further include:
The first sending module of program parameter is used for the search that will be saved in default programme information library according to the playing request
To second program parameter be sent in audio/video decoder so that for carrying out program broadcasting, the second program parameter is at least wrapped
Include audio PID Packet Identifier, video PID Packet Identifier and Program Clock Reference PID Packet Identifier；
Judgment module, for respectively corresponding the audio PID Packet Identifier judged in first program parameter, video PID Packet Identifier, section
When audio PID Packet Identifier in mesh reference clock PID Packet Identifier and the second program parameter, video PID Packet Identifier, program reference
It is identical whether clock PID Packet Identifier all corresponds to；
The second sending module of program parameter, in first program parameter audio PID Packet Identifier, video PID Packet Identifier,
Audio PID Packet Identifier, video PID Packet Identifier, program reference in Program Clock Reference PID Packet Identifier and the second program parameter
Clock PID Packet Identifier without it is all corresponding identical when, by first program parameter be sent in the audio/video decoder with
In the progress program broadcasting.
6. the acquisition system of digital television program parameter as claimed in claim 5 is applied to program searching, which is characterized in that
The request receiving module further include:
Searching request receiving unit, for receiving the searching request of TV programme；
The terminal further include:
Program parameter preserving module, for first program parameter to be saved in default program information database；
Frequency point setting module, for next frequency point to be set as current frequency point.
7. further including front end, which is characterized in that institute such as the acquisition system of digital television program parameter described in claim 5 or 6
Stating front end includes:
Generation module, the corresponding data section of default description for generating the SDT table；
Module is obtained, for obtaining third program parameter corresponding to each program, the third program parameter includes at least sound
Frequency PID Packet Identifier, video PID Packet Identifier and Program Clock Reference PID Packet Identifier；
Package module, for according to predefined data encapsulation format, the third section corresponding to each program that will acquire
In the corresponding data section of default description of the corresponding SDT table of mesh parameter insertion and carry out data encapsulation；
Sending module gives the end for that will complete the SDT table packing generation transport stream Data Concurrent after data encapsulate
End.
8. the acquisition system of digital television program parameter as claimed in claim 7, which is characterized in that the loading module packet
It includes:
Frequency locking unit, for lockking current frequency point to obtain frequency point information；
First filter element, for the PID Packet Identifier and table identifier according to the preset SDT, filter the frequency point information with
Obtain the SDT；
The parsing module includes:
Second filter element filters the SDT for the preset mark according to default description to obtain described preset and retouch
State son；
Resolution unit, for parsing default description, obtaining current frequency point and correspond to program according to the data encapsulation format
First program parameter.
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| CN201510429098.7A CN105025346B (en) | 2015-07-20 | 2015-07-20 | The acquisition methods and system of digital television program parameter |
| PCT/CN2016/084696 WO2017012429A1 (en) | 2015-07-20 | 2016-06-03 | Method and system for acquiring digital television program parameter |
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| CN105025346B (en) * | 2015-07-20 | 2018-12-07 | 深圳Tcl数字技术有限公司 | The acquisition methods and system of digital television program parameter |
| CN105763940A (en) * | 2016-02-26 | 2016-07-13 | 青岛海信电器股份有限公司 | Program broadcasting method and apparatus |
| CN109275041B (en) * | 2018-11-09 | 2020-10-23 | 四川长虹电器股份有限公司 | Method for automatically acquiring digital program information |
| JP7258716B2 (en) * | 2019-10-10 | 2023-04-17 | Ｔｖｓ Ｒｅｇｚａ株式会社 | Receiving device, server, content recommendation program, content recommendation system, content recommendation method |
| CN112672215B (en) * | 2020-12-17 | 2021-12-21 | 四川长虹电器股份有限公司 | Method for filtering invalid television programs |
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| CN101753979A (en) * | 2009-12-10 | 2010-06-23 | 四川长虹电器股份有限公司 | Method for updating programs of set-top box |
| KR101909032B1 (en) * | 2010-09-01 | 2018-10-17 | 엘지전자 주식회사 | Broadcast signal processing method and device for 3-dimensional (3d) broadcasting service |
| CN102469346B (en) * | 2010-11-18 | 2013-12-25 | 深圳创维数字技术股份有限公司 | Method and system for generating interactive film played at one-way digital television receiving terminal |
| CN102123323B (en) * | 2010-12-27 | 2012-10-24 | 四川长虹电器股份有限公司 | Method for rapidly updating television program of single-tuner set top box |
| CN102075807A (en) * | 2011-01-06 | 2011-05-25 | 深圳创维数字技术股份有限公司 | Digital television program searching method, and digital television receiving terminal and transmission system |
| CN102075805A (en) * | 2011-01-20 | 2011-05-25 | 深圳创维数字技术股份有限公司 | Bright color adjusting method, digital television receiving terminal and front-end server |
| CN103269441B (en) * | 2013-05-30 | 2016-07-06 | 四川长虹电器股份有限公司 | A kind of method of digital television program fast search |
| CN104754425B (en) * | 2013-12-27 | 2018-01-16 | 北京创维海通数字技术有限公司 | A kind of transmission method of unidirectional DVB network signaling datas in bilateral network |
| CN105025346B (en) * | 2015-07-20 | 2018-12-07 | 深圳Tcl数字技术有限公司 | The acquisition methods and system of digital television program parameter |
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