CN102547379A - Emergency broadcast method, emergency broadcast device and emergency broadcast front-end of digital television - Google Patents
Emergency broadcast method, emergency broadcast device and emergency broadcast front-end of digital television Download PDFInfo
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Abstract
The invention discloses an emergency broadcast method, an emergency broadcast device and an emergency broadcast front-end of a digital television. The method comprises the steps of detecting if information of an emergency broadcasting program corresponding to an emergency broadcast digital television program stream is set in a network information table, wherein the information comprises transmission setting information and program setting information; if the information of the emergency broadcasting program corresponding to the emergency broadcast digital television program stream is set in the network information table, obtaining the emergency broadcast digital television program stream on a designated frequency according to the transmission setting information; and parsing and broadcasting the emergency broadcast digital television program stream. Through the method, the invention is capable of applying to set top boxes with different receiving modules, and can transmit any one or two of a video data packet or an audio data packet. Thus, the emergency broadcasting programs can be broadcasted in an image and sound manner and the attention of users for the emergency broadcasting programs can improved.
Description
Technical field
The present invention relates to digital TV field, particularly relate to the emergent broadcasting method of a kind of DTV, device and the emergent broadcast head end of DTV.
Background technology
The signal transmission form of DTV mainly contains satellite digital TV, cable digital TV and terrestrial DTV.Medium according to transmission is different, STB is divided into equally wired, three kinds of DTV STBs of satellite and ground, in this article, the indistinguishably unified STB that is called.
STB generally includes tuning demodulator, channel demodulator, information source demodulation multiplexer, MPEG-2 decoder, video encoder, audio frequency D/A, Conditional Access Module etc.Tuning demodulator receives high frequency or radiofrequency signal, accomplishes channel-decoding through channel demodulator, from carrier wave, isolates the transmission stream (TS) that comprises sound, video and other data message.The transmission flow demultiplexing device then is used for distinguishing different programs, and the program demodulation multiplexer extracts corresponding sound, video flowing and data flow, sends into MPEG-2 decoder and the corresponding software of resolving, and accomplishes the reduction of digital information.For pay TV, Conditional Access Module carries out descrambling to sound, video flowing, and adopts the smart card that contains the identification user and the function of keeping accounts, and the assurance validated user is normally watched.The MPEG-2 decoder decompresses and to be looked, audio signal, again through video encoder and audio frequency D/A conversion, restore simulate look, audio signal, on conventional color television set, show high quality graphic, and the multichannel sterego program be provided.
At present, emergent broadcast message is added into Program Specific Information (Program Specifically Information packs in PSI), joins among the TS through multiplexer then, and sends to user's STB through being modulated into high frequency or radiofrequency signal.Tuning demodulator in the STB receives high frequency or radiofrequency signal; Accomplish channel-decoding through channel demodulator; The transmission flow demultiplexing device filters the packet that obtains comprising PSI; Send to then that Conditional Access Module and smart card carry out descrambling, deciphering obtains PSI, and obtain emergent broadcast message further, in screen, show the literal of emergent broadcast message.
But under situation now, Conditional Access Module has a plurality of different suppliers, and the supplier of different condition receiver module provides the various conditions receiver module, thereby the popularization of prior art receives very big restriction.And the emergent broadcast message that joins in the Program Specific Information is a Word message, is not enough to cause user's attention.
Summary of the invention
The technical problem that the present invention mainly solves provides emergent broadcasting method of a kind of DTV and device, can be applicable to the STB of different condition receiver module, and the emergent broadcast message with video/audio cooperation can be provided.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: a kind of DTV broadcasting method of meeting an urgent need is provided; Comprise the steps: to detect the information that in network information table, whether is provided with the emergent broadcast program corresponding with emergent broadcast digital TV program stream, said information comprises that transmission is provided with information and program is provided with information; If be provided with the information of the emergent broadcast program corresponding in the said network information table, according to said transmission information be set and on specified frequency, obtain emergent broadcast digital TV program stream with said emergent broadcast digital TV program stream; Resolve said emergent broadcast digital TV program stream and play.
Wherein, saidly according to transmission information is set and on specified frequency, obtains emergent broadcast digital TV program stream step and also comprise the steps: the identifier that obtains said emergent broadcast digital TV program stream the information to be set from said transmission; On specified frequency, obtain emergent broadcast digital TV program stream with said identifier according to said identifier.
Wherein, the said setting according to program also comprises the steps: to detect said program after the packet step of the said emergent broadcast program of information broadcast and information is set whether is set to lock-out state; If be set at lock-out state, current emergent broadcast program is play in locking.
Wherein, detecting said program is provided with information and whether is set to released state; If be set at released state, the current emergent broadcast program of release.
For solving the problems of the technologies described above; Another technical scheme that the present invention adopts is: a kind of DTV broadcaster of meeting an urgent need is provided; Comprise: first detection module; Be used for detecting the information that whether is provided with the emergent broadcast program corresponding with emergent broadcast digital TV program stream at network information table, said information comprises that transmission is provided with information and program is provided with information; First acquisition module is used for when said network information table is provided with the information of the emergent broadcast program corresponding with said emergent broadcast digital TV program stream, according to said transmission information is set and on specified frequency, obtains emergent broadcast digital TV program stream; Broadcast module is used to resolve said emergent broadcast digital TV program stream and plays.
Wherein, said device also comprises: second acquisition module is used for from said transmission the identifier that information is obtained said emergent broadcast digital TV program stream being set; The 3rd acquisition module is used on specified frequency, obtaining the emergent broadcast digital TV program stream with said identifier according to said identifier.
Wherein, said device also comprises: second detection module is used to detect said program and information is set whether is set to lock-out state; Locking module is used for when being set at lock-out state, and current emergent broadcast program is play in locking.
Wherein, said device also comprises: the 3rd detection module is used to detect said program and information is set whether is set to released state; Separate lock module, be used for when being set at released state, the current emergent broadcast program of release.
For solving the problems of the technologies described above; Another technical scheme that the present invention adopts is: a kind of DTV broadcast head end of meeting an urgent need is provided; Said front end comprises: first insert module; Be used for inserting at network information table the information of the emergent broadcast program corresponding with emergent broadcast digital TV program stream, said information comprises that transmission is provided with information and program is provided with information; Modulation module is used for emergent broadcast digital TV program stream is modulated to specified frequency.
Wherein, said front end also further comprises: second insert module is used in said transmission the identifier that information is inserted said emergent broadcast digital TV program stream being set.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention is through detecting the information whether emergent broadcast program is set in network information table, and when detecting the information of emergent broadcast program; According to transmission information is set and jumps to the packet that obtains emergent broadcast program on the specified frequency; Need not through Conditional Access Module, thereby can be suitable for the STB of different condition receiver module, and; Simultaneously any or both of transmitting video data bag or packets of audio data on specific frequency; Thereby, emergent broadcast program can be broadcasted with the form of video/audio, improve the attention rate of user to emergent broadcast program.
Description of drawings
Fig. 1 is the flow chart of emergent broadcasting method first embodiment of DTV of the present invention;
Fig. 2 is the structural representation of emergent broadcaster first embodiment of DTV of the present invention;
Fig. 3 is the structural representation of emergent broadcaster second embodiment of DTV of the present invention;
Fig. 4 is the structural representation of emergent broadcast head end first embodiment of DTV of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Consult Fig. 1, the emergent broadcasting method embodiment of a kind of DTV of the present invention comprises:
Step S110: detect the information that in network information table, whether is provided with the emergent broadcast program corresponding with emergent broadcast digital TV program stream, said information comprises that transmission is provided with information and program is provided with information.
Emergent broadcast digital TV program stream is that operator will meet DVB (Digital Video Broadcasting, DVB) a series of packet that is packaged into of the emergent broadcast program of standard.Transmission has been provided with information setting and has transmitted relevant information with emergent broadcast program; As the identifier of the frequency that transmits, symbol rate, modulation system, emergent broadcast digital TV program stream (Packet Identifier, PID), effective length of clock reference identifier, emergent broadcasting descriptor or the like.Program has been provided with information setting and has play relevant information with emergent broadcast program, like broadcast identifier, meet an urgent need broadcast program type, lockup state or the like.
Step S120:, according to said transmission information is set and on specified frequency, obtains emergent broadcast digital TV program stream if be provided with the information of the emergent broadcast program corresponding in the said network information table with said emergent broadcast digital TV program stream.
From transmission the identifier that obtains emergent broadcast digital TV program stream the information is set, on specified frequency, obtains emergent broadcast digital TV program stream according to identifier then with identifier.Specified frequency can be positioned at same frequency with the program of current broadcast, also can not be same frequency.If the program of assigned frequency and current broadcast is positioned at same frequency, obtain emergent broadcast digital TV program stream in current frequency.If assigned frequency is positioned at different frequencies with the program of current broadcast, jump to correspondent frequency earlier, obtain emergent broadcast digital TV program stream again.
Step S130: resolve said emergent broadcast digital TV program stream and play.
If program is provided with and is provided with broadcast identifier in the information; Then emergent broadcast program is play, and need not repeat to play, if program is provided with broadcast identifier is not set in the information; Then emergent broadcast program is not play, and needs to play emergent broadcast program.During broadcast, resolve emergent broadcast digital TV program stream and information is set and play according to program.Be provided with that to be provided with lockup state in the information be lock-out state if detect program, current emergent broadcast program is play in locking, forbids user's switching channels; Be provided with that to be provided with lockup state in the information be released state if detect program, the current emergent broadcast program of release allows user's switching channels.
Be different from the situation of prior art, the present invention is through detecting the information whether emergent broadcast program is set in network information table, and when detecting the information of emergent broadcast program; According to transmission information is set and jumps to the packet that obtains emergent broadcast program on the specified frequency; Need not through Conditional Access Module, thereby can be suitable for the STB of different condition receiver module, and; Simultaneously any or both of transmitting video data bag or packets of audio data on specific frequency; Thereby, emergent broadcast program can be broadcasted with the form of video/audio, improve the attention rate of user to emergent broadcast program.
Be the emergent more concrete application examples of broadcasting method of a kind of DTV of the present invention below.
If need the emergent broadcast program of broadcasting, at first, operator makes the emergent broadcast program that meets the DVB standard through the program collecting and editing system.Then, in the emergent broadcast head end of DTV will be met an urgent need the information insertion network information table of broadcast program through business information (SI) editing machine.The information of emergent broadcast program comprises that transmission is provided with information and program is provided with information, and they can realize definition through in first circulation of network information table, inserting the emergent descriptor of broadcasting.Emergent broadcasting descriptor is for to follow a privately owned descriptor that defines on the DVB standard base fully, and concrete definition mode in the present embodiment is following:
Front end regularly sends network information table, and under the situation of guaranteed efficiency, the time regularly is short as much as possible, guarantees that the user can receive emergent broadcast program as soon as possible after opening DTV, preferred timing be 10 seconds/inferior.
Simultaneously; The front end broadcast program of will meeting an urgent need is packed and is formed emergent broadcast digital TV program stream; If specifying the frequency of emergent broadcast program and the frequency of other program is same frequency; Then, then TS is modulated to specified frequency, and sends to user's STB through multiplexer will meet an urgent need broadcast digital TV program stream and the multiplexing formation of other program stream TS; If emergent broadcast program occupies a specified frequency separately, then emergent broadcast digital TV program stream forms TS separately, then TS is modulated to specified frequency, and sends to user's STB.
The STB of user side regularly detects in network information table, and whether broadcast identifier Descriptor_tag exists the information that can judge whether to be provided with the emergent broadcast program corresponding with emergent broadcast digital TV program stream; If there is not broadcast identifier; Not emergent broadcast program is described, STB continues to detect network information table; If there is broadcast identifier, emergent broadcast program has been described, STB explains that the relevant transmission of emergent broadcasting descriptor acquisition is provided with information and program is provided with information.
Transmission has been provided with information setting and has transmitted relevant information with emergent broadcast program, like the identifier Emergency_Broadcast_id of the frequency Frequency that transmits, symbol rate Symbol_rate, modulation system Modulation, emergent broadcast digital TV program stream, clock reference identifier Pcr_pid, emergent effective length Descriptor_length that broadcasts descriptor or the like.In the present embodiment; STB has obtained frequency that emergent broadcast program transmits, symbol rate, modulation system from emergent broadcasting descriptor Delivery_system_descriptor () after; The control tuning demodulator switches to the frequency at emergent broadcast program place, and receives the TS that comprises emergent broadcast program with corresponding symbol rate, modulation system.
Program has been provided with information setting and has play relevant information with emergent broadcast program, like broadcast identifier Descriptor_tag, broadcast program type Emergency_Broadcast_type, lockup state Lock_status or the like meet an urgent need.
If the broadcast identifier that is provided with equates that with the numerical value of the last broadcast identifier that is provided with then STB has been play this emergent broadcast program; If the numerical value of broadcast identifier and the last broadcast identifier that is provided with does not wait, then STB is play the broadcast program of should meeting an urgent need as yet, and needing to play should emergent broadcast program.
If emergent broadcast program type is a video type, obtain clock reference identifier, video packets identifier and audio pack identifier.The program demodulation multiplexer extracts corresponding sound, video flowing through video packets identifier and audio pack identifier, and through the clock reference identifier sound, the video flowing that extract is reconstructed into emergent broadcast program and broadcast.If emergent broadcast program type is an audio types, obtain the audio pack identifier, extract corresponding audio stream and broadcast.
During broadcast, if lockup state is set to lock-out state, the emergent broadcast program of locking is forbidden user's switching channels; If lockup state is set to released state, the release broadcast program of meet an urgent need, permission user switching channels.
Be different from the situation of prior art, the present invention is through detecting the information whether emergent broadcast program is set in network information table, and when detecting the information of emergent broadcast program; According to transmission information is set and jumps to the packet that obtains emergent broadcast program on the specified frequency; Need not through Conditional Access Module, thereby can be suitable for the STB of different condition receiver module, and; Simultaneously any or both of transmitting video data bag or packets of audio data on specific frequency; Thereby, emergent broadcast program can be broadcasted with the form of video/audio, improve the attention rate of user to emergent broadcast program.
Consult Fig. 2, a kind of DTV of the present invention broadcaster of meeting an urgent need comprises:
Consult Fig. 3; In another embodiment; Transmission is provided with information setting transmits relevant information with emergent broadcast program and comprises: and the identifier of the frequency of transmission, symbol rate, modulation system, emergent broadcast digital TV program stream (Packet Identifier, PID), clock reference identifier, emergent effective length of broadcasting descriptor or the like.Program is provided with information setting plays relevant information with emergent broadcast program and comprises broadcast identifier, meet an urgent need broadcast program type, lockup state or the like.First detection module 110 regularly detects network information table.If be provided with the information of emergent broadcast program in the network information table; From transmission the identifier that obtains emergent broadcast digital TV program stream the information is set through second acquisition module 121, on specified frequency, obtains emergent broadcast digital TV program stream according to identifier through the 3rd acquisition module 122 then with identifier.
Specified frequency can be positioned at same frequency with the program of current broadcast, also can not be same frequency.If the program of assigned frequency and current broadcast is positioned at same frequency, obtain emergent broadcast digital TV program stream in current frequency.If assigned frequency is positioned at different frequencies with the program of current broadcast, jump to correspondent frequency earlier, obtain emergent broadcast digital TV program stream again.
If program is provided with and is provided with broadcast identifier in the information; Then emergent broadcast program is play, and need not repeat to play, if program is provided with broadcast identifier is not set in the information; Then emergent broadcast program is not play, and needs to play emergent broadcast program.During broadcast, broadcast module 130 is resolved emergent broadcast digital TV program stream and according to program information is set and plays.If second detection module detects program and is provided with that to be provided with lockup state in the information be lock-out state, current emergent broadcast program is play in the locking module locking, forbids user's switching channels; If the 3rd detection module detects program and is provided with that to be provided with lockup state in the information be released state, separate the current emergent broadcast program of lock module release, allow user's switching channels.
Be different from the situation of prior art, the present invention is through detecting the information whether emergent broadcast program is set in network information table, and when detecting the information of emergent broadcast program; According to transmission information is set and jumps to the packet that obtains emergent broadcast program on the specified frequency; Need not through Conditional Access Module, thereby can be suitable for the STB of different condition receiver module, and; Simultaneously any or both of transmitting video data bag or packets of audio data on specific frequency; Thereby, emergent broadcast program can be broadcasted with the form of video/audio, improve the attention rate of user to emergent broadcast program.
Consult Fig. 4, a kind of DTV of the present invention broadcast head end of meeting an urgent need comprises first insert module 210, second insert module 220 and modulation module 230.
In other embodiment, transmit be set comprising with the relevant information of emergent broadcast program transmission of information setting: effective length of the identifier of the frequency of transmission, symbol rate, modulation system, emergent broadcast digital TV program stream, clock reference identifier, emergent broadcasting descriptor or the like.Program is provided with information setting plays relevant information with emergent broadcast program and comprises broadcast identifier, meet an urgent need broadcast program type, lockup state or the like.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. the emergent broadcasting method of DTV is characterized in that, comprises the steps:
Whether detection is provided with the information of the emergent broadcast program corresponding with emergent broadcast digital TV program stream in network information table, said information comprises that transmission is provided with information and program is provided with information;
If be provided with the information of the emergent broadcast program corresponding in the said network information table, according to said transmission information be set and on specified frequency, obtain emergent broadcast digital TV program stream with said emergent broadcast digital TV program stream;
Resolve said emergent broadcast digital TV program stream and play.
2. the DTV according to claim 1 broadcasting method of meeting an urgent need is characterized in that, saidly according to transmission information is set and on specified frequency, obtains emergent broadcast digital TV program stream step and also comprise the steps:
From said transmission the identifier that obtains said emergent broadcast digital TV program stream the information is set;
On specified frequency, obtain emergent broadcast digital TV program stream with said identifier according to said identifier.
3. the DTV according to claim 1 broadcasting method of meeting an urgent need is characterized in that, also comprises the steps: after the said packet step that the said emergent broadcast program of information broadcast is set according to program
Detecting said program is provided with information and whether is set to lock-out state;
If be set at lock-out state, current emergent broadcast program is play in locking.
4. the DTV according to claim 3 broadcasting method of meeting an urgent need is characterized in that,
Detecting said program is provided with information and whether is set to released state;
If be set at released state, the current emergent broadcast program of release.
5. the emergent broadcaster of DTV is characterized in that, comprising:
First detection module is used for detecting the information that whether is provided with the emergent broadcast program corresponding with emergent broadcast digital TV program stream at network information table, and said information comprises that transmission is provided with information and program is provided with information;
First acquisition module is used for when said network information table is provided with the information of the emergent broadcast program corresponding with said emergent broadcast digital TV program stream, according to said transmission information is set and on specified frequency, obtains emergent broadcast digital TV program stream;
Broadcast module is used to resolve said emergent broadcast digital TV program stream and plays.
6. the DTV according to claim 5 broadcaster of meeting an urgent need is characterized in that said device also comprises:
Second acquisition module is used for from said transmission the identifier that information is obtained said emergent broadcast digital TV program stream being set;
The 3rd acquisition module is used on specified frequency, obtaining the emergent broadcast digital TV program stream with said identifier according to said identifier.
7. the DTV according to claim 5 broadcaster of meeting an urgent need is characterized in that said device also comprises:
Second detection module is used to detect said program and information is set whether is set to lock-out state;
Locking module is used for when being set at lock-out state, and current emergent broadcast program is play in locking.
8. the DTV according to claim 7 broadcaster of meeting an urgent need is characterized in that said device also comprises:
The 3rd detection module is used to detect said program and information is set whether is set to released state;
Separate lock module, be used for when being set at released state, the current emergent broadcast program of release.
9. the emergent broadcast head end of a DTV is characterized in that said front end comprises:
First insert module is used for the information at the network information table insertion emergent broadcast program corresponding with emergent broadcast digital TV program stream, and said information comprises that transmission is provided with information and program is provided with information;
Modulation module is used for emergent broadcast digital TV program stream is modulated to specified frequency.
10. the DTV according to claim 9 broadcast head end of meeting an urgent need is characterized in that said front end also further comprises:
Second insert module is used in said transmission the identifier that information is inserted said emergent broadcast digital TV program stream being set.
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| CN105471533A (en) * | 2015-12-31 | 2016-04-06 | 深圳Tcl数字技术有限公司 | Digital television emergency broadcast playing method and digital television terminal |
| CN105791898A (en) * | 2016-03-04 | 2016-07-20 | 深圳市茁壮网络股份有限公司 | Emergency broadcast method and emergency broadcast device |
| CN105915981A (en) * | 2016-06-04 | 2016-08-31 | 深圳市煜森达电子有限公司 | Man-machine interaction high-definition digital set top box |
| CN109640143A (en) * | 2018-12-27 | 2019-04-16 | 深圳西米通信有限公司 | A kind of triggering method based on terrestrial digital television set box emergent broadcast |
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Application publication date: 20120704 |