CN101330398B - Method for transmitting business data flow - Google Patents
Method for transmitting business data flow Download PDFInfo
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- CN101330398B CN101330398B CN200810144511.5A CN200810144511A CN101330398B CN 101330398 B CN101330398 B CN 101330398B CN 200810144511 A CN200810144511 A CN 200810144511A CN 101330398 B CN101330398 B CN 101330398B
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- multiplexing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/70—Media network packetisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a method for sending a mobile multimedia broadcast service data stream, which can improve transmission efficiency and fault-tolerance of a mobile multimedia broadcast system. The method comprises the following steps: taking video frequency, audio frequency or data of a mobile multimedia broadcast service as a payload of a multiplexing block; the basic description information of the multiplexing block is encapsulated at the head part of the multiplexing block; the basic description information comprises the type of the multiplexing block; the type is used for identifying that the payload of the multiplexing block is the video frequency, the audio frequency or the data; the multiplexing consisting of the payloads and the head part as a payload is encapsulated in a corresponding video unit, a corresponding audio unit or a corresponding data unit; the video unit, the audio unit or the data unit are encapsulated in a multiplexing sub-frame according to the mobile multimedia broadcast multiplexing standards; the multiplexing sub-frame forms a multiplexing frame; and the multiplexing frame is transmitted through a mobile multimedia broadcast network.
Description
Technical field
The present invention relates to the China mobile multi-media broadcasting technology field, particularly a kind of sending method of mobile multi-media broadcast service data stream.
Background technology
Mobile Multimedia Broadcasting is the Play Technique for Multimedia of a kind of broadcast mode of rising in recent years.By hand-held terminal, under the situation of high-speed mobile, can watch multimedia services such as TV.Terminal receives the multimedia service programme by wireless broadcast channel, and can select the channel of oneself having the right to watch, receives the multi-medium data of selecting channel, sees TV on the portable terminal thereby be implemented in.
At present mobile multimedia broadcast system can adopt the several data transmission method, and common have transport stream, multi-protocols encapsulation, an IP data encapsulation etc.In the mobile multimedia broadcast system of China, the multiplexed frame structure is the second portion of Mobile Multimedia Broadcasting series standard, and it comprises the multiplexed frame frame head that contents such as Payload, length information and media parameter are formed.Multiplexed frame has defined the encapsulation format of data flow, and a multiplexed frame is made up of a plurality of multiplexed sub frames, and the quantity of multiplexed sub frame is included in the multiplex frame head.
Wherein in each multiplexed sub frame the encapsulation multi-media broadcasting service content, its structure as shown in Figure 1, multiplexed sub frame comprises multiplexed sub frame head, video-frequency band, audio section and data segment.Wherein shown in Fig. 2 a, video-frequency band is formed by a plurality of video unit encapsulation; Shown in Fig. 2 b, audio section is formed by a plurality of audio unit encapsulation; Shown in Fig. 2 c, data segment is formed by a plurality of data cell encapsulation.
As from the foregoing, video unit, audio unit, data cell are the minimum units in the available data stream method for packing.When transfer of data makes a mistake, because no tangible border is distinguished between the unit that video unit, audio unit, data cell are adjacent, the data of all unit of video-frequency band/audio section/data segment need be abandoned, promptly can't only abandon the unit of the part of makeing mistakes, thereby lead to errors diffusion, greatly influenced the efficiency of transmission and the fault-tolerance of multi-media broadcasting system.
Summary of the invention
Technical problem to be solved by this invention provides a kind of sending method of mobile multi-media broadcast service data stream, can improve the efficiency of transmission and the fault-tolerance of mobile multimedia broadcast system.
In order to solve the problems of the technologies described above, the invention provides a kind of sending method of business data flow, comprise: with video, audio frequency or the data of mobile multi-media broadcasting service payload as multiplexing, described multiplexing basic descriptor is encapsulated in multiplexing build portion, described basic descriptor comprises this type of multiplexing, and it is video, audio frequency or data that described type is used to identify this payload of multiplexing; To be made of payload and head multiplexing is encapsulated in corresponding video unit, audio unit or the data cell as payload; With described video unit, audio unit or data cell according to the mobile multimedia broadcasting multiplex standard packaging in multiplexed sub frame, more described multiplexed sub frame is formed multiplexed frame, transmit described multiplexed frame by mobile media broadcasting network.
Further, when this multiplexing block type indicates the business datum of carrying in the multiplexing block payload to be data, add the data cell type of the type that is used to indicate described data in multiplexing build portion.
Further, the data cell type in the data segment header of the content of described data cell type and multiplexed sub frame is identical.
Further, when video unit, audio unit or the data unit length of described Mobile Multimedia Broadcasting during greater than multiplexing payload length, use video unit, audio unit or the data cell of two or more the multiplexing described Mobile Multimedia Broadcasting of carrying, first multiplexing in carrying this video unit, audio unit or data cell is provided with start mark, at last multiplexing that carries this video unit, audio unit or data cell end mark is set.
Further, described multiplexing build portion also comprises one or several in the following information: initial code is used to identify described multiplexing original position; The length of multiplexing payload; Fault-tolerant information comprises the check information of multiplexing build portion.
The present invention has proposed a kind of sending method of business data flow in mobile media broadcasting network, the video unit of mobile multimedia broadcasting multiplex frame, audio unit or data cell are formed by one or more multiplexing encapsulation in this method, use multiplexing block type to distinguish multiplexing of video unit, multiplexing and multiplexing of data cell of audio unit, wherein multiplexing for data cell can utilize the data cell type to distinguish Data Source and classification; Also use initial code as isolation for each multiplexing, thereby realize wrong the isolation; By multiplexing mark, realize multimedia service data of a plurality of multiplexing transmission; Adopt the method for the invention, guaranteed that mobile multimedia broadcast system has the characteristics of efficiency of transmission height, zmodem.Multiplexing block structured head expense is smaller in this method in addition, has guaranteed the multimedia broadcasting transmission performances.
Description of drawings
Fig. 1 is the structural representation of multiplexed sub frame;
Fig. 2 a is the structural representation of video-frequency band;
Fig. 2 b is the structural representation of audio section;
Fig. 2 c is the structural representation of data segment;
The flow chart that Fig. 3 sends for the present embodiment data flow;
Fig. 4 is a multiplexing structural representation in the present embodiment.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Main design of the present invention is: the business datum of using one or more multiplexing carrying mobile multimedia broadcast systems, in multiplexing build, add these some essential informations of multiplexing, comprising multiplexing block type, it is used to distinguish video multiplex piece, audio-frequency multiplex piece and data multiplex piece; According to multiplexing block type with multiplexing video unit, audio unit that is encapsulated in Mobile Multimedia Broadcasting standard multiplexed frame as payload, be encapsulated in video unit, audio unit, data cell in the multiplexed sub frame respectively then, at last a plurality of multiplexed sub frames are formed Mobile Multimedia Broadcasting standard multiplexed frame, transmitted by mobile media broadcasting network.
Each multiplexing build also comprises the fault-tolerant information of initial code, start mark, end mark, payload length and error correction (for example redundancy check word CRC).Indicating what carry in the multiplexing payload when multiplexing block type is the data multiplexing piece, can also comprise the data cell type in then multiplexing, and it is used to distinguish Data Source and classification.
The sending method of mobile multi-media broadcast service data stream may further comprise the steps as shown in Figure 3 in the present embodiment:
Particularly, this multiplexing block type is used to represent that this multiplexing is multiplexing of the carrying video, multiplexing or carrying data multiplexing piece of carrying audio frequency; Head also comprises the data cell type, uses for carrying data multiplexing piece, that is to say, when being carrying data multiplexing piece for this multiplexing, the data cell type is used for representing the type of data.The definition of this data cell type is identical with data cell type in the data segment header of multiplexed sub frame.
Multiplexing build bilge construction except that type and data cell type, comprises that also initial code, start mark, end mark, payload length and CRC are fault-tolerant as shown in Figure 4;
Multiplexing build portion can also comprise initial code, start mark, end mark, payload length and CRC error correction, and wherein initial code is used to identify multiplexing beginning, and start mark is used to describe first multiplexing, and end mark is used to describe last multiplexing.Payload length information, this length information is meant the length of multiplexing block payload.CRC error correction, this error correction information are the check information of multiplexing head.
When Service Data Unit (video unit, audio unit, the data cell) length of Mobile Multimedia Broadcasting during smaller or equal to multiplexing multiplexing payload length, use the Service Data Unit of one multiplexing carrying Mobile Multimedia Broadcasting, and this multiplexing is provided with start mark and end mark simultaneously; When the Service Data Unit length of Mobile Multimedia Broadcasting during greater than multiplexing multiplexing payload length, use the Service Data Unit of two or more multiplexing carrying Mobile Multimedia Broadcasting, first multiplexing is provided with start mark, and last multiplexing is provided with end mark.
Figure 4 shows that in the present embodiment, the structural representation that the sending method of business data flow is employed multiplexing, it comprises head and payload, and wherein head comprises initial code, start mark, end mark, type, payload length, data cell type and redundancy check word, wherein:
Initial code is used to identify multiplexing original position, is the first of multiplexing build portion, and it can take multiplexing first byte, and in the present embodiment, initial code takies 8 (1 bytes), value fixed value 0X55.Initial code is except as multiplexing beginning, also is multiplexing border in video unit, audio unit, the data cell, is used for the location and divides multiplexing.During multiplexing in extracting video unit, audio unit, data cell, terminal can realize multiplexing integrality by checking initial code and length in addition;
Start mark and end mark, be respectively applied for whether current multiplexing of sign is the beginning or the ending of video unit, audio unit or data cell, when video unit, audio unit or data cell are divided into a plurality of multiplexing block movement, start mark is used to describe first multiplexing, and end mark is used to describe last multiplexing;
Payload length is used to identify multiplexing payload length, and unit is a byte;
Type refers to multiplexing block type, is used to indicate the type of this multiplexing business datum of carrying, and what promptly represent this multiplexing carrying is video, audio frequency or data, referring to table 1.Form video unit for multiplexing of the carrying video, form audio unit for multiplexing of the carrying audio frequency, carrying data multiplexing piece is formed data cell;
The numerical example of the multiplexing block type of table 1
| Value | Multiplexing block type |
| 00 | Carrying multiplexing of video |
| 01 | Carrying multiplexing of audio frequency |
| 10 | Carrying data multiplexing piece |
| 11 | Keep |
The data cell type is used when multiplexing carrying data, is used to represent the type of data, referring to table 2;
The numerical example of table 2 data cell type
| Value | The data cell type |
| 0 | ESG (electron service instruction) |
| 1 | The ESG program |
| 2～127 | Keep |
| 128～159 | Encryption authorization |
| 160～169 | Data broadcasting |
| 170～255 | Keep |
Redundancy check word CRC, the redundancy check word of multiplexing build portion;
Payload refers to multiplexing payload, promptly multiplexing middle loaded service data.Multiplexing payload can be audio frequency, video or data in the present embodiment.
In the present embodiment, the expense that designs above-mentioned multiplexing build bilge construction comprises totally 2 of initial code 8 (bit), start mark and end marks, 2 of types, 12 of length informations, 8 of data cell types, the CRC8 position, in other embodiments, shared bit is variable for each field, but maximum 40, compare with 96 expenses of multi-protocols in European Digital Television DVB standard encapsulation, have higher encapsulation and efficiency of transmission.
In the present embodiment, when terminal parses video unit, audio unit or data cell, the mistake of arbitrary multiplexing generation can not have influence on other multiplexing, has promptly realized wrong isolation; At the multiplexed frame structural design of Mobile Multimedia Broadcasting, the special multiplexing block type that proposes of present embodiment has guaranteed that mobile multimedia broadcast system has the characteristics of efficiency of transmission height, zmodem.
Adopt the method for the invention, be not subjected to the restriction of transport protocol type, be applicable to various protocols such as real time streaming transport protocol, file transfer protocol (FTP), multiplexing transmission agreement, therefore needn't consider the influence of agreement in multiplexing build portion.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. the sending method of a business data flow is characterized in that,
With video, audio frequency or the data of mobile multi-media broadcasting service payload as multiplexing, described multiplexing basic descriptor is encapsulated in multiplexing build portion, described basic descriptor comprises this type of multiplexing, and it is video, audio frequency or data that described type is used to identify this payload of multiplexing;
To be made of payload and head multiplexing is encapsulated in corresponding video unit, audio unit or the data cell as payload;
With described video unit, audio unit or data cell according to the mobile multimedia broadcasting multiplex standard packaging in multiplexed sub frame, more described multiplexed sub frame is formed multiplexed frame, transmit described multiplexed frame by mobile media broadcasting network;
When video unit, audio unit or the data unit length of described Mobile Multimedia Broadcasting during greater than multiplexing payload length, use video unit, audio unit or the data cell of two or more the multiplexing described Mobile Multimedia Broadcasting of carrying, first multiplexing in carrying this video unit, audio unit or data cell is provided with start mark, at last multiplexing that carries this video unit, audio unit or data cell end mark is set.
2. the method for claim 1 is characterized in that, when this multiplexing block type indicates the business datum of carrying in the multiplexing block payload to be data, adds the data cell type of the type that is used to indicate described data in multiplexing build portion.
3. method as claimed in claim 2 is characterized in that, the content of described data cell type is identical with data cell type in the data segment header of multiplexed sub frame.
4. as claim 1 or 2 or 3 described methods, it is characterized in that described multiplexing build portion also comprises one or several in the following information:
Initial code is used to identify described multiplexing original position;
The length of multiplexing payload;
Fault-tolerant information comprises the check information of multiplexing build portion.
5. the method for claim 1 is characterized in that, described multiplexing type takies 2bit.
6. method as claimed in claim 2 is characterized in that, described data cell type takies 8bit.
7. the method for claim 1 is characterized in that, described start mark and end mark respectively account for 1bit.
8. method as claimed in claim 4 is characterized in that described initial code takies 8bit; Described payload length takies 12bit; Described fault-tolerant information takies 8bit.
9. as the described method of arbitrary claim among claim 1-3, the 5-8, it is characterized in that described multiplexing build portion takies and is no more than 40bit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810144511.5A CN101330398B (en) | 2008-07-25 | 2008-07-25 | Method for transmitting business data flow |
| PCT/CN2009/072752 WO2010009657A1 (en) | 2008-07-25 | 2009-07-14 | A method for transmitting service data stream |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810144511.5A CN101330398B (en) | 2008-07-25 | 2008-07-25 | Method for transmitting business data flow |
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| Publication Number | Publication Date |
|---|---|
| CN101330398A CN101330398A (en) | 2008-12-24 |
| CN101330398B true CN101330398B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810144511.5A Expired - Fee Related CN101330398B (en) | 2008-07-25 | 2008-07-25 | Method for transmitting business data flow |
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| Country | Link |
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| CN (1) | CN101330398B (en) |
| WO (1) | WO2010009657A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330398B (en) * | 2008-07-25 | 2010-06-16 | 中兴通讯股份有限公司 | Method for transmitting business data flow |
| CN101567740B (en) * | 2009-05-27 | 2013-08-07 | 中兴通讯股份有限公司 | Method and device for transmitting multimedia broadcast service and receiving terminal |
| CN101938659A (en) * | 2009-06-30 | 2011-01-05 | 中兴通讯股份有限公司 | Method and device for expanding services in mobile multimedia broadcast system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101110960A (en) * | 2007-08-02 | 2008-01-23 | 北京创毅视讯科技有限公司 | Multimedia broadcast data transmission method, device and system |
| CN101198044A (en) * | 2007-12-14 | 2008-06-11 | 北京创毅视讯科技有限公司 | Transmission method and emission system for data broadcasting service data in broadcasting system |
| CN101207460A (en) * | 2007-12-14 | 2008-06-25 | 北京创毅视讯科技有限公司 | Method and terminal for receiving data in broadcasting system |
| CN101212413A (en) * | 2006-12-30 | 2008-07-02 | 中兴通讯股份有限公司 | Mobile multimedia broadcast data transmission method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1972454A (en) * | 2006-11-30 | 2007-05-30 | 中兴通讯股份有限公司 | Mobile multimedia broadcasting real-time traffic flow packaging method |
| CN100544447C (en) * | 2007-07-11 | 2009-09-23 | 中兴通讯股份有限公司 | A kind of transmission method of mobile multi-media broadcast service data stream |
| CN101110961B (en) * | 2007-08-03 | 2010-06-16 | 北京创毅视讯科技有限公司 | Multimedia broadcast data transmission method, device and system |
| CN101453653B (en) * | 2007-12-07 | 2011-01-05 | 中兴通讯股份有限公司 | Method for spreading digital audio and video parameter set |
| CN101330398B (en) * | 2008-07-25 | 2010-06-16 | 中兴通讯股份有限公司 | Method for transmitting business data flow |
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2008
- 2008-07-25 CN CN200810144511.5A patent/CN101330398B/en not_active Expired - Fee Related
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- 2009-07-14 WO PCT/CN2009/072752 patent/WO2010009657A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212413A (en) * | 2006-12-30 | 2008-07-02 | 中兴通讯股份有限公司 | Mobile multimedia broadcast data transmission method |
| CN101110960A (en) * | 2007-08-02 | 2008-01-23 | 北京创毅视讯科技有限公司 | Multimedia broadcast data transmission method, device and system |
| CN101198044A (en) * | 2007-12-14 | 2008-06-11 | 北京创毅视讯科技有限公司 | Transmission method and emission system for data broadcasting service data in broadcasting system |
| CN101207460A (en) * | 2007-12-14 | 2008-06-25 | 北京创毅视讯科技有限公司 | Method and terminal for receiving data in broadcasting system |
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| Publication number | Publication date |
|---|---|
| WO2010009657A1 (en) | 2010-01-28 |
| CN101330398A (en) | 2008-12-24 |
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