CN103001756A - Method for transmitting business data in layered mode in digital audio broadcasting - Google Patents
Method for transmitting business data in layered mode in digital audio broadcasting Download PDFInfo
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Abstract
The invention provides a method for transmitting business data in a layered mode in digital audio broadcasting. Information required to be transmitted on a channel of the digital audio broadcasting is divided into control information and the business data, business description information is packed in a first multiplex frame mode to form a control multiplex frame, the business data are packed in a second multiplex frame mode to form a business multiplex frame, a business description information channel and a business data channel are provided in each logic frame, so that one control multiplex frame and one or more business multiplex frames can be respectively born, the business data channels with a same protection rate in one logic frame bear one business multiplex frame, and a plurality of logic frames are packed to form a channel superframe. By means of the layered transmitting method, different grades of services can be provided for users with different receiving conditions.
Description
Technical field
The present invention relates to communication and digital audio broadcasting field, relate in particular to the method for Delamination Transmission business datum in a kind of digital audio broadcasting.
Background technology
Multiplexing function is to finish Information encapsulation and the arrangements such as audio frequency, data, electron service instruction in the communications field, can transmit at transmission channel.In digital multimedia broadcasting system in the past, also do not provide mechanism and the method for Delamination Transmission business datum.Yet, digital audio broadcast system has the requirement of self to business datum, it should guarantee the extensive reception of particular traffic data, for example, assurance provides to the user under free user or the relatively poor reception environment satisfies the digital audio broadcasting service of substantially listening to requirement, and this is one of Liquified gas tanker of audio broadcasting; Simultaneously, also needing provides differentiated service to user and the zone of various heterogeneitys and condition, and for example the user under paying customer or the good reception environment provides higher-quality audio broadcasting service.Therefore need to provide a kind of in digital audio broadcasting the method for Delamination Transmission business datum.
Summary of the invention
In order one of to solve the problems of the technologies described above, the invention provides the method for Delamination Transmission business datum in a kind of digital audio broadcasting, need to be divided in the information of digital audio broadcasting channel control information and business datum; Pack described business description information with the formation control multiplexed frame with the first multiplexed frame pattern; Pack described business datum to form the service integration frame with the second multiplexed frame pattern; In each logical frame, all provide business description information channel and business datum passage, to carry respectively a described control multiplexed frame and one or more service integration frame; Service integration frame of business datum passage carrying that protective rate is identical in a logical frame; Be packaged as the channel superframe by a plurality of described logical frame.
Especially, comprise with the step of formation control multiplexed frame with the first multiplexed frame pattern described business description information of packing: in the multiplexed frame payload of described control multiplexed frame, insert one or more control information tables; And
In the multiplex frame head of described control multiplexed frame, insert the field of contained control information table quantity in this multiplexed frame payload of indication and each control information table length.
Described control information table comprises period service duplexing configuration list and network information table, and described period service duplexing configuration list and network information table are respectively applied to carry the information of each the service integration frame configuration in the current frequency and the attribute information of digital audio broadcasting network and adjacent area network thereof.
Described method also comprises the steps: the service integration frame identification of whole service integration frames of a superframe of record in described period service duplexing configuration list, and the indication of business datum hierarchical modulation, business datum are just protected indication and service integration frame transmission mode.
One of them described service integration frame identification symbol is used for a kind of corresponding relation that the modulation of tagged traffic data hierarchy is indicated, business datum is just protected indication and service integration frame transmission mode.
A described channel superframe comprises 4 logical frame, and described service integration frame identification is 6 bit fields; Described business datum hierarchical modulation indication comprises 1 bit field, is used for the tagged traffic data and whether uses hierarchical modulation; Described business datum just protects indication to comprise 1 bit field, and being used for the tagged traffic data is high protection or low protection; Described multiplexed frame transmission mode represents the logical frame situation that the service integration frame of current multiplexed frame sign takies in a channel superframe, comprise 4 bit fields, its each logical frame for the expression superframe.
And, in the multiplex frame head of each described service integration frame, insert corresponding service integration frame identification symbol.
The user who utilizes Delamination Transmission method of the present invention to can be implemented as different condition of acceptances provides the service of different brackets, simultaneously, also can distinguish different types of business and transmit.For example, when adopting hierarchical modulation, audio frequency multilevel coding scheme can be mapped on the different protective rates of hierarchical modulation, for the good zone of the quality of reception, the user can normally receive the information under all protective rates of hierarchical modulation, the high-quality audio program of uppick; For the bad zone of the quality of reception, the user can only receive the audio program that uppick is basic with information corresponding to high protection under the hierarchical modulation.Equally; when adopting hierarchical modulation, also can corresponding different types of business transmit, high protection is lower; transmit basic important information; low protection is lower, the transmission supplementary, and the user is according to different physics condition of acceptances; can all receive; perhaps receive only the information under the high protective rate, thereby the user who improves whole audio droadcasting system experiences usability and extensibility.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 shows the schematic diagram of multiplexing part in the digital audio broadcasting front end system;
Fig. 2 shows the multiplexed frame structure according to the embodiment of the invention;
Fig. 3 shows according to the corresponding relation of the multiplexed frame of the embodiment of the invention and channel superframe and multiplexed frame structure;
Fig. 4 shows the control multiplexed frame frame head structure according to the embodiment of the invention;
Fig. 5 shows the control multiplexed frame frame head parameter configuration according to the embodiment of the invention;
Fig. 6 shows the period service duplexing configuration list definition according to the embodiment of the invention;
Fig. 7 shows the network information table definition according to the embodiment of the invention;
Fig. 8 shows the service integration frame structure that adopts not stratified modulation system according to the embodiment of the invention;
Fig. 9 shows the service integration frame structure according to the employing hierarchical modulation mode of the embodiment of the invention;
Figure 10 shows the service integration frame frame head structure according to the embodiment of the invention;
Figure 11 shows the service integration frame frame head parameter configuration according to the embodiment of the invention;
Figure 12 shows according to the multiplexed sub frame structure in the service integration frame frame payload of the embodiment of the invention.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein identical or similar label represents identical or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In order one of to solve the problems of the technologies described above, the invention provides the method for Delamination Transmission business datum in a kind of digital audio broadcasting.At first, need to be divided in the information of digital audio broadcasting channel control information and business datum, in the front end system of digital audio broadcasting of the present invention, multiplexing purpose is to carry out Information encapsulation and the arrangements such as audio frequency, data, electron service instruction, can transmit at the digital audio broadcasting channel, see Fig. 1.The audio frequency Basic Flow of same business and data flow are encapsulated in one or more multiplexed sub frames as business datum; The supplementarys such as urgent broadcast, electron service instruction, user management are also as business datum but be encapsulated in respectively in the different multiplexed sub frames.Control information table and network information table encapsulate as control information.
Subsequently, pack described business description information to form a control multiplexed frame with the first multiplexed frame pattern; Pack described business datum to form a service integration frame with the second multiplexed frame pattern; In each logical frame, all provide business description information channel and business datum passage, to carry respectively a described control multiplexed frame and one or more service integration frame.Described the first multiplexed frame pattern and the second multiplexed frame pattern will be discussed in more detail below.The multiplexed frame of different identification sends with different physical layer logic channels in channel treatment processes.
Specifically, as shown in Figure 3, the channel of audio broadcasting adopts a channel super frame period mode, and a channel superframe is comprised of a plurality of channel logical frame, for example, is comprised of 4 channel logical frame.Each channel logical frame has business description information channel and business datum passage for the multiplexing passage that provides.According to the structure of business description information channel and business datum passage, multiplexed frame is divided into two types of control multiplexed frame and service integration frames.Various control information tables are carried in the business description information channel with control multiplexed frame form, and the miscellaneous service data are carried in the business datum passage with service integration frame form.The control information table according to the capacity of business description information channel transmit successively on the passage and allow a control information table segmenting after transmit successively by section.
The structure of described multiplexed frame as shown in Figure 2, especially, multiplexed frame only carries a multiplexed frame a logical frame---comprise the service integration frame and the control multiplexed frame is comprised of multiplex frame head, multiplexed frame payload and filling.Filling part can be filled with complete 1.Wherein, a control of the business description information channel of logical frame carrying multiplexed frame, identical service integration frame of business datum passage carrying of protective rate in the logical frame.
Especially, with the first multiplexed frame pattern pack described business description information with form one control multiplexed frame step comprise:
In the multiplexed frame payload of described control multiplexed frame, insert one or more control information tables.Comprise one or more control information tables in the multiplexed frame payload of the control multiplexed frame of a business description information carrying.In addition, as shown in Figure 4, in the multiplex frame head of described control multiplexed frame, insert the field of contained control information table quantity in this multiplexed frame payload of indication and each control information table length.In the present embodiment, described control information table comprises period service duplexing configuration list and network information table, and described period service duplexing configuration list and network information table are used for carrying respectively the information of each the service integration frame configuration in the current frequency and the attribute information of digital audio broadcasting network and adjacent area network thereof.Described control information table identifies with the table identification number, and the distribution of table identification number as shown in Figure 5.Especially, when the length of described control information table surpasses the active volume of business description information channel in the logical frame, described control information table is carried out segmentation, and in different logical frame, transmit the control information table after the described segmentation.
And, service integration frame of business datum passage carrying that protective rate is identical in a logical frame.Be packaged as the channel superframe by a plurality of described logical frame.
That is to say that a business datum passage can only comprise high protection business datum passage or only comprise low protection business datum passage, also can comprise simultaneously high protection business datum passage and low protection business datum passage.Specifically, described service integration frame payload is comprised of one or more multiplexed sub frames, multiplexed sub frame is used for bearer service, a multiplexed sub frame can only carry the data of a business, when a business datum passage only is used for one of the high protection of carrying or low protection business datum passage, when namely not using the hierarchical coding technology, a professional corresponding multiplexed sub frame, its frame structure is as shown in Figure 8; When a logical frame had both comprised that high protection business datum passage also comprised low protection business datum passage, when namely using the hierarchical coding technology, one professional according to minute progression corresponding 2 or more multiplexed sub frame, and its frame structure as shown in Figure 9.
Adopt the mode of distinguishing the level protection class that the service of different brackets can be provided for the user of different condition of acceptances, simultaneously, also can distinguish different types of business and transmit.For example, when adopting hierarchical modulation, audio frequency multilevel coding scheme can be mapped on the different protective rates of hierarchical modulation, for the good zone of the quality of reception, the user can normally receive the information under all protective rates of hierarchical modulation, the high-quality audio program of uppick; For the bad zone of the quality of reception, the user can only receive the audio program that uppick is basic with information corresponding to high protection under the hierarchical modulation.Equally, when adopting hierarchical modulation, also can corresponding different types of business transmit, high protection is lower; transmit basic important information, low protection is lower, the transmission supplementary; the user can all receive according to different physics condition of acceptances, perhaps receives only the information under the high protective rate.
For the situation of distinguishing the level protection class, need to be when transmission the level protection situation of each logical frame be recorded and transmits.In one embodiment of the invention, can utilize period service duplexing configuration list to carry out record, described period service duplexing configuration list has been described the information of each the service integration frame configuration in the current frequency, such as service identification corresponding to the multiplexed sub frame number of each service integration frame and subframe etc.Can record the service integration frame identification of whole service integration frames of a superframe in described period service duplexing configuration list, the indication of business datum hierarchical modulation, business datum are just protected indication and service integration frame transmission mode.One of them described service integration frame identification symbol is used for a kind of corresponding relation that the modulation of tagged traffic data hierarchy is indicated, business datum is just protected indication and service integration frame transmission mode.
Comprise in the situation of 4 logical frame at a channel superframe, described service integration frame identification can be 6 bit fields; Described business datum hierarchical modulation indication comprises 1 bit field, is used for the tagged traffic data and whether uses hierarchical modulation; Described business datum just protects indication to comprise 1 bit field, and being used for the tagged traffic data is high protection or low protection; Described multiplexed frame transmission mode comprises 4 bit fields, its each logical frame for the expression superframe.
And, for the described layered protection situation of record in each multiplexed frame, also need in the multiplex frame head of each described service integration frame, insert corresponding service integration frame identification symbol.Structural group prejudice Figure 10 of service integration frame head, specific definition as shown in figure 11.Wherein multiplexed sub frame is comprised of subframe head, audio section, data segment and filling, and its specific definition as shown in figure 12.
In addition, period service duplexing configuration list for example can also comprise: table identification number, segment length, section sequence number, hop count amount, period service duplexing configuration list upgrade the service identification of sequence number, multiplexed sub frame quantity and each multiplexed sub frame.The example of a period service duplexing configuration list as shown in Figure 6, wherein M1 represents multiplexed frame sign quantity; M2 represents multiplexed sub frame quantity.Wherein:
Multiplexed frame sign quantity: 6 bit fields represent the quantity of the multiplexed frame sign that comprises in the current segmentation.
The multiplexed frame sign: 6 bit fields, the MF_ID of identification service multiplexed frame is since 1 value.
The indication of business datum hierarchical modulation: 1 bit field, 1 expression business datum is used hierarchical modulation, and hierarchical modulation is not used in 0 expression.
Business datum is just protected indication: 1 bit field, and 1 expression business datum is used high protection, and 0 expression business datum is used low protection.
The multiplexed frame transmission mode: 4 bit fields, the transmission mode of expression service integration frame, each field represent current multiplexed frame sign institute counterlogic frame and take situation.Bit from left to right is corresponding the 1st to the 4th logical frame successively.Bit is that logical frame corresponding to 1 expression is occupied, is that logical frame corresponding to 0 expression is unoccupied.
Multiplexed sub frame quantity: 4 bit fields, the multiplexed sub frame quantity that expression service integration frame comprises.
Service identification: 16 bit fields, represent each multiplexed sub frame corresponding professional identification number.
Preferably, described step to the period service duplexing configuration list segmentation is the information that all comprises table identification number, segment length, section sequence number, hop count amount, period service duplexing configuration list renewal sequence number in each segmentation; Corresponding multiplexed frame transmission mode, the indication of business datum hierarchical modulation, the business datum of multiplexed frame sign just protects the service identification of indication, multiplexed sub frame quantity and each multiplexed sub frame to be retained in the segmentation; And corresponding multiplexed frame transmission mode, the indication of business datum hierarchical modulation, the business datum of different multiplexed frame signs just protects the service identification of indication, multiplexed sub frame quantity and each multiplexed sub frame can be distributed in the different segmentations.
In addition, the digital audio broadcasting transfer system of network operator's operation and management is called a network; There is other network that intersects to be called the adjacent area network with its area of coverage known to this network.As shown in Figure 7, described network information table has been described and has been comprised: character, adjacent area the number networks, adjacent area network number, adjacent area network frequency quantity and the adjacent area network center frequency of centre frequency, network title length and each title of table identification number, segment length, section sequence number, hop count amount and update sequence number of network information list, national code, network number, network frequency quantity and each frequency.Wherein: N1 represents current network frequency quantity; N2 represents current network title length; N3 represents adjacent area the number networks; N4 represents corresponding specific adjacent area network frequency quantity.
Described step to network information table segmenting is shown identification number, segment length, section sequence number, hop count amount and update sequence number of network information list for all comprising in each segmentation; The character of the centre frequency of national code, network number, network frequency quantity and each frequency, network title length and each title, adjacent area the number networks are retained in the segmentation; And the adjacent area network number of an adjacent area network, adjacent area network frequency quantity and adjacent area network center frequency be retained in the segmentation, and the adjacent area network number of different adjacent areas network, adjacent area network frequency quantity are retained in the different segmentations with adjacent area network center frequency.
Below in conjunction with some examples, method of the present invention is further detailed.
The multiplexed frame transmission mode represents the logical frame situation that the service integration frame of current multiplexed frame sign takies in a channel superframe.The indication of business datum hierarchical modulation and business datum are just protected corresponding business datum channel characteristic in the indication expression logical frame.The multiplexed frame transmission mode is corresponding one by one with the multiplexed frame sign, and a plurality of service integration frames may have same multiplexed frame sign.Below described without hierarchical modulation and the several instantiations that have under the hierarchical modulation.
1. the service integration number of frames of 1: one channel superframe of example is 4, has 4 multiplexed frame signs.The logical frame that multiplexed frame identifies 1 correspondence is 1; The logical frame that multiplexed frame identifies 2 correspondences is 2; The logical frame that multiplexed frame identifies 3 correspondences is 3; The logical frame that multiplexed frame identifies 4 correspondences is 4.The multiplexed frame transmission mode of multiplexed frame sign 1 is 1000; The multiplexed frame transmission mode of multiplexed frame sign 2 is 0100; The multiplexed frame transmission mode of multiplexed frame sign 3 is 0010; The multiplexed frame transmission mode of multiplexed frame sign 4 is 0001; 4 business datum hierarchical modulation indications corresponding to multiplexed frame sign are 0.
2. the service integration number of frames of 2: one channel superframes of example is 4, has 3 multiplexed frame signs.The logical frame that multiplexed frame identifies 1 correspondence is 1 and 2; The logical frame that multiplexed frame identifies 2 correspondences is 3; The logical frame that multiplexed frame identifies 3 correspondences is 4.The multiplexed frame transmission mode of multiplexed frame sign 1 is 1100; The multiplexed frame transmission mode of multiplexed frame sign 2 is 0010; The multiplexed frame transmission mode of multiplexed frame sign 3 is 0001; 3 business datum hierarchical modulation indications corresponding to multiplexed frame sign are 0.
3. the service integration number of frames of 3: one channel superframes of example is 6, has 4 multiplexed frame signs.The logical frame that multiplexed frame identifies 1 correspondence is 1 and 2 height protection business datum passage; The logical frame that multiplexed frame identifies 2 correspondences is 1 and 2 low protection business datum passage; The logical frame that multiplexed frame identifies 3 correspondences is 3; The logical frame that multiplexed frame identifies 4 correspondences is 4.The multiplexed frame transmission mode of multiplexed frame sign 1 is 1100, and the business datum hierarchical modulation is designated as 1, and business datum is just protected and is designated as 1; The multiplexed frame transmission mode of multiplexed frame sign 2 is 1100, and the business datum hierarchical modulation is designated as 1, and business datum is just protected and is designated as 0; The multiplexed frame transmission mode of multiplexed frame sign 3 is 0010, and the business datum hierarchical modulation is designated as 0; The multiplexed frame transmission mode of multiplexed frame sign 4 is 0001, and the business datum hierarchical modulation is designated as 0.
Adopting Delamination Transmission to make up under the mechanism of business datum passage, in channel treatment processes, can carry out different processing for different level protection class.Hierarchical modulation indication and height protection indication have provided the protection class of current business in the period service duplexing configuration list, and when hierarchical modulation is designated as 1 and height protection when being designated as 1, expression has hierarchical modulation at present, and be high the protection; When hierarchical modulation is designated as 1 and height protection when being designated as 0, expression has hierarchical modulation at present, and is low protection.Utilize the hierarchical modulation indication, height protection indication, the multiplexed frame sign that provide in the period service duplexing configuration list; can judge that business corresponding to current corresponding multiplexed sub frame/service identification is high protection or low protection, further processes the multiplexed sub frame in the service integration frame.
The user who utilizes Delamination Transmission method of the present invention to can be implemented as different condition of acceptances provides the service of different brackets, simultaneously, also can distinguish different types of business and transmit.For example, when adopting hierarchical modulation, audio frequency multilevel coding scheme can be mapped on the different protective rates of hierarchical modulation, for the good zone of the quality of reception, the user can normally receive the information under all protective rates of hierarchical modulation, the high-quality audio program of uppick; For the bad zone of the quality of reception, the user can only receive the audio program that uppick is basic with information corresponding to high protection under the hierarchical modulation.Equally; when adopting hierarchical modulation, also can corresponding different types of business transmit, high protection is lower; transmit basic important information; low protection is lower, the transmission supplementary, and the user is according to different physics condition of acceptances; can all receive; perhaps receive only the information under the high protective rate, thereby the user who improves whole audio droadcasting system experiences usability and extensibility.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the method for Delamination Transmission business datum in the digital audio broadcasting is characterized in that:
Need to be divided in the information of digital audio broadcasting channel control information and business datum;
Pack described business description information with the formation control multiplexed frame with the first multiplexed frame pattern;
Pack described business datum to form the service integration frame with the second multiplexed frame pattern;
In each logical frame, all provide business description information channel and business datum passage, to carry respectively a described control multiplexed frame and one or more service integration frame;
Service integration frame of business datum passage carrying that protective rate is identical in a logical frame;
Be packaged as the channel superframe by a plurality of described logical frame.
2. method according to claim 1 is characterized in that:
Comprise with the step of formation control multiplexed frame with the first multiplexed frame pattern described business description information of packing:
In the multiplexed frame payload of described control multiplexed frame, insert one or more control information tables; And
In the multiplex frame head of described control multiplexed frame, insert the field of contained control information table quantity in this multiplexed frame payload of indication and each control information table length.
3. method according to claim 2 is characterized in that:
Described control information table comprises period service duplexing configuration list and network information table, is used for carrying respectively the information of each the service integration frame configuration in the current frequency and the attribute information of digital audio broadcasting network and adjacent area network thereof.
4. method according to claim 3, it is characterized in that: described method also comprises the steps:
The service integration frame identification of whole service integration frames of a superframe of record in described period service duplexing configuration list, the indication of business datum hierarchical modulation, business datum are just protected indication and service integration frame transmission mode.
5. method according to claim 4 is characterized in that: one of them described service integration frame identification symbol is used for a kind of corresponding relation that indication and service integration frame transmission mode are just protected in tagged traffic data hierarchy modulation indication, business datum.
6. method according to claim 5, it is characterized in that: a described channel superframe comprises 4 logical frame, and described service integration frame identification is 6 bit fields; Described business datum hierarchical modulation indication comprises 1 bit field, is used for the tagged traffic data and whether uses hierarchical modulation; Described business datum just protects indication to comprise 1 bit field, and being used for the tagged traffic data is high protection or low protection; Described multiplexed frame transmission mode represents the logical frame situation that the service integration frame of current multiplexed frame sign takies in a channel superframe, comprise 4 bit fields, its each logical frame for the expression superframe.
7. method according to claim 5 is characterized in that: insert corresponding service integration frame identification symbol in the multiplex frame head of each described service integration frame.
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Application publication date: 20130327 |