CN102316365A - Method for realizing China mobile multimedia broadcasting (CMMB) network local range different-content broadcasting - Google Patents
Method for realizing China mobile multimedia broadcasting (CMMB) network local range different-content broadcasting Download PDFInfo
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Abstract
The invention belongs to the field of China mobile multimedia broadcasting (CMMB) mobile multimedia signal transmission and broadcasting, in particular to a method for realizing CMMB network local range different-content broadcasting, which is characterized in that the existing broadcasting network is utilized, and a measure of replacing specific contents through the special processing during the data delivery and broadcasting modulation is used for realizing the playing of different contents in a specified region. Compared with the traditional method, the method can complete the secondary program orchestration without demultiplexing and remultiplexing equipment and can meet the personalized playing of different contents in different regions, and a large quantity of equipment such as multiplexers, broadcasting modulators, demultiplexing and remultiplexing equipment and the like is saved. The system structure of the method is simple, the realization is convenient, and the method is applicable to all fields of carrying broadcasting contents according to different time slot combinations.
Description
Technical field
The present invention relates to the transmission and the broadcast world of CMMB mobile multimedia signal, be specifically related to a kind of method of the CMMB of realization network local scope different content broadcasting.
Background technology
In digital broadcasting, carry out the broadcast of multiple programs usually simultaneously, simultaneously a lot of systems are to carry out according to the mode of different time-gap broadcasting different content.Under this mode, zones of different is play different content (podcast service), be one very complicacy be thing.Particularly a plurality of different zones, the podcast that carry out different content respectively is a complicacy and loaded down with trivial details thing especially, need just can realize with large number quipments.
The common broadcasting flow process of digital program broadcasting is: program stream-＞encoder-＞multiplexer-＞transmission equipment-＞the broadcasting modulation-＞radio frequency output, concrete implementation is as shown in Figure 1, and the time slot principle of digital broadcasting modulation is as shown in Figure 2.
Wherein different broadcasting modulation cover different zones, but the content of broadcasting is the same.Because structure of time slot is confirmed by multiplexer that fully therefore, in the broadcasting modulation of zones of different, its structure of time slot is identical.
Play different content in zones of different, traditional implementation is as shown in Figure 3, and its characteristics are:
1, N kind different broadcast contents combination needs N multiplexer equipment;
2, identical with content broadcast mode is compared, and transmission network bandwidth or data transfer rate need improve N doubly;
Even if 3 most programme contents are identical, have only indivedual contents also not need so simultaneously.
Another kind of mode adopts demultiplexing and multiplexing again mode to accomplish, and as shown in Figure 4, the characteristics of this mode are:
1, the broadcasting that the N kind is different needs 2 multiplexers at least.With need to increase the multiplexing equipment of a demultiplexing/again before the broadcasting modulation of broadcasting 1 different content;
2, identical with content broadcast mode is compared biography, and the defeated network bandwidth or data transfer rate need improve 2 times.
Summary of the invention
The object of the present invention is to provide the method for the realization CMMB network local scope different content broadcasting that a kind of system configuration is simple, efficient is high, cost is low.It utilizes existing radio network, and the method for replacing through time slot content can be implemented in appointed area broadcast different content, does not need demultiplexing to reach complex device such as multiplexing again.
Realize the technical scheme of the object of the invention:
A kind of method that realizes the broadcasting of CMMB network local scope different content is characterized in that: may further comprise the steps:
(1) to carry out program data through multiplexer respectively multiplexing general program source, particular content programs source, generates corresponding multiplexed data flow;
(2) the distributing data processor carries out distribution channels to multiplexed data flow and handles according to pursuing time slot, reading in each multiplexed data flow by the order of frequency, the unified complete distributing data stream that sorts of output; When distribution channels is not accomplished distribution transmission of packet data when encapsulation as yet, distribution channels is carried out redundancy automatically and is sent, till accomplishing when the distribution transmission of packet data encapsulated;
(3), transfer to the broadcast transmission website through transmission network through each multiplexed data flow after the distribution processor;
(4) when needs are launched generic broadcasted content, entire stream is carried out verification;
When needs insert the particular broadcast content:
A analyzes the ownership of time slot;
B screens general data stream and certain content data flow;
C pursues the certain content data flow time slot, inserts in the general data stream by frequency ground based on demand;
The d data flow is carried out verification to entire stream after inserting;
During content in needs are generic broadcasted with particular broadcast content replacement:
A analyzes the ownership of time slot;
B screens general data stream and certain content data flow;
C pursues the certain content data flow time slot, replaces the data in the general data stream by frequency ground according to demand;
After the replacement of d data flow, entire stream is carried out verification;
(5) data of broadcast modulator after to verification are modulated;
(6) data after the modulation are carried out wireless transmit through antenna.
Effect of the present invention is: utilize existing radio network, be implemented in the appointed area through the special processing when distributing data is modulated with broadcasting through the means to the certain content replacement and play different content.Compare with conventional method, this method does not need demultiplexing to reach multiplexing equipment again can accomplish program layout again, just can satisfy the personalization of the different content of different regions and broadcast, and has practiced thrift multiplexer, broadcast modulator and demultiplexing and has reached large number quipments such as multiplexing again.System configuration of the present invention is simple, and it is convenient to realize, is suitable for the field that all carry broadcasted content according to the different time-gap combination.
Description of drawings
Fig. 1 is the system principle sketch map of existing digital program broadcasting;
Fig. 2 is the time slot principle schematic of existing digital broadcast modulation;
Fig. 3 is the principle schematic of existing a kind of local scope different content broadcasting implementation;
Fig. 4 is the principle schematic of existing another kind of local scope different content broadcasting implementation;
Fig. 5 is a kind of principle schematic that realizes the method for CMMB network local scope different content broadcasting provided by the present invention;
Fig. 6 inserts and replaces the principle schematic of handling for time slot among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Like Fig. 5, shown in 6, a kind of method that realizes the broadcasting of CMMB network local scope different content of the present invention may further comprise the steps:
(1) general program source like the 1-7 of Chinese Central Television (CCTV) programs, generates the multiplexed data flow of generic broadcasted content through CMMB multiplexer 1.The particular content programs source is like the multiplexed data flow of Jiangzhou city station synchronization through different broadcasted contents in the CMMB multiplexer 2 generation local area-specific scopes;
(2) multiplexed data flow of multiplexer 1 and multiplexer 2 each self-generating need pass through the distributing data processor processes, because the speed of multiplexed data flow is not invariable, so the distribution processor process is complicated.To guarantee the integrality of all the elements through the multiplexed data flow after the distribution processor; Comprise the complete of generic broadcasted content and local area-specific scope broadcasted content; For example comprise the 1-7 of Chinese Central Television (CCTV) programs and Jiangzhou city station synchronization, with the complete reliability of guaranteeing all to guarantee data when modulation and time slot insert and replace broadcasting.The distributing data processor is according to pursuing time slot, reading in multiplexed data flow by the order of frequency; Promptly pass the data of same time slot different frequent points earlier; Descend the data of a time slot different frequent points again, and transmit the data of the next frequency of same time slot again by regulation frequency order after the transfer of data of same frequency finishes in the same time slot.System confirms the transmission symbol rate of system's distributing data according to the rate requirement of different transmission networks.When system distribution transmittability during greater than the data of needs transmission; Must adopt redundant form to carry out transmission rate adaptation; Adaptation method is: when distribution channels is not accomplished the encapsulation of distribution transmission of packet data as yet; Distribution channels is carried out redundancy automatically and is sent, when accomplishing to the encapsulation of distribution transmission of packet data till.
(3) through each multiplexed data flow after the distribution processor; Through different transmission networks; Networks such as for example wireless MMDS (Multichannel Multipoint Distribution Service) network, satellite transmission network, fiber optic network, cable TV network, the 1-7 of Chinese Central Television (CCTV) programs and Jiangzhou city station synchronization are transferred to each broadcast transmission website, before this; Processing through the distributing data processor; Formed the multiplexed data flow of unified ordering,, comprised generic broadcasted content and local area-specific scope broadcasted content to guarantee the integrality of all broadcasted contents.
(4) launch the cell site of generic broadcasted content at needs, do not carry out that time slot inserts and the processing of replacement, for example 1 cell site of the broadcast modulator among Fig. 5 promptly sends the 1-7 of Chinese Central Television (CCTV) cover TV programme.
(5) when needs insert the particular broadcast content:
A analyzes the ownership of time slot through analyzing the header packet information in the multiplex stream;
B screens the 1-7 of Chinese Central Television (CCTV) cover television programme data stream and Jiangzhou city TV station program data;
After c inserts the 1-7 of Chinese Central Television (CCTV) cover TV programme with Jiangzhou city station synchronization by time slot, by frequency ground;
After the d data flow is inserted, adopt prior art,, entire stream is carried out verification like CRC check;
Data after 2 pairs of verifications of broadcast modulator are modulated, and the data after the modulation are carried out wireless transmit through antenna, and the content of final broadcasting is the 1-7 of Chinese Central Television (CCTV) programs and Jiangzhou city station synchronization.
(6) during the content in needs are generic broadcasted with particular broadcast content replacement:
A analyzes the ownership of time slot;
B screens the 1-7 of Chinese Central Television (CCTV) cover television programme data stream and Jiangzhou city TV station program data;
C pursues Jiangzhou city station synchronization time slot, overlaps TV programme by the frequency ground replacement Chinese Central Television (CCTV) 7;
After the replacement of d data flow, entire stream is carried out verification;
Data after 3 pairs of verifications of broadcast modulator are modulated, and the data after the modulation are carried out wireless transmit through antenna, and the content of final broadcasting is the 1-6 of Chinese Central Television (CCTV) programs and Jiangzhou city station synchronization.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Belong within the scope of claim of the present invention and equivalent technologies thereof if these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (2)
1. method that realizes CMMB network local scope different content broadcasting is characterized in that: may further comprise the steps:
(1) to carry out program data through multiplexer respectively multiplexing general program source, particular content programs source, generates corresponding multiplexed data flow;
(2) the distributing data processor carries out distribution channels to multiplexed data flow and handles according to pursuing time slot, reading in each multiplexed data flow by the order of frequency, the unified complete distributing data stream that sorts of output; When distribution channels is not accomplished distribution transmission of packet data when encapsulation as yet, distribution channels is carried out redundancy automatically and is sent, till accomplishing when the distribution transmission of packet data encapsulated;
(3), transfer to the broadcast transmission website through transmission network through each multiplexed data flow after the distribution processor;
(4) when needs are launched generic broadcasted content, entire stream is carried out verification;
When needs insert the particular broadcast content:
A analyzes the ownership of time slot;
B screens general data stream and certain content data flow;
C pursues the certain content data flow time slot, inserts in the general data stream by frequency ground based on demand;
The d data flow is carried out verification to entire stream after inserting;
During content in needs are generic broadcasted with particular broadcast content replacement:
A analyzes the ownership of time slot;
B screens general data stream and certain content data flow;
C pursues the certain content data flow time slot, replaces the data in the general data stream by frequency ground according to demand;
After the replacement of d data flow, entire stream is carried out verification;
(5) data of broadcast modulator after to verification are modulated;
(6) data after the modulation are carried out wireless transmit through antenna.
2. according to the described a kind of method that realizes the broadcasting of CMMB network local scope different content of claim 1, it is characterized in that: the transmission network in the step (3) is wireless MMDS network, or satellite transmission network, or fiber optic network, or cable TV network.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463512A (en) * | 2001-04-05 | 2003-12-24 | 松下电器产业株式会社 | Data broadcast rpogram TS (transport stream) transmission appts. and method, data broadcast program transmission program, recording medium, delivery appts. and dilivery system |
| CN1825944A (en) * | 2005-02-25 | 2006-08-30 | 华为技术有限公司 | A mobile video broadcasting system and mobile video broadcasting method |
| CN1913617A (en) * | 2005-08-11 | 2007-02-14 | 华为技术有限公司 | System for implementing mobile terminal TV service and program transmitting watching method |
| CN101156390A (en) * | 2005-04-02 | 2008-04-02 | 三星电子株式会社 | Apparatus and method for delivering stream in a mobile broadcast system |
| CN101494758A (en) * | 2008-12-31 | 2009-07-29 | 赵章佑 | Single frequency net front end center transmitting station for multi-channel of digital television ground broadcast |
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- 2010-07-07 CN CN2010102189700A patent/CN102316365A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463512A (en) * | 2001-04-05 | 2003-12-24 | 松下电器产业株式会社 | Data broadcast rpogram TS (transport stream) transmission appts. and method, data broadcast program transmission program, recording medium, delivery appts. and dilivery system |
| CN1825944A (en) * | 2005-02-25 | 2006-08-30 | 华为技术有限公司 | A mobile video broadcasting system and mobile video broadcasting method |
| CN101156390A (en) * | 2005-04-02 | 2008-04-02 | 三星电子株式会社 | Apparatus and method for delivering stream in a mobile broadcast system |
| CN1913617A (en) * | 2005-08-11 | 2007-02-14 | 华为技术有限公司 | System for implementing mobile terminal TV service and program transmitting watching method |
| CN101494758A (en) * | 2008-12-31 | 2009-07-29 | 赵章佑 | Single frequency net front end center transmitting station for multi-channel of digital television ground broadcast |
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Application publication date: 20120111 |