CN101022556A - FIC new allocation design method in T-MMB system compatible DAB - Google Patents
FIC new allocation design method in T-MMB system compatible DAB Download PDFInfo
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Abstract
A method for designing FIC newly added configuration in T-MMB system of compatible DAB describes coding mode and modulation mode as well as some other character of T-MMB service by newly adding certain fast information group and expanding definition of certain specific identification of original FIG in transmission frame of T-MMB system for realizing a multimedia broadcast system of compatible digital audio broadcast.
Description
Technical field
The present invention relates to digital multimedia broadcasting system, particularly in the FIC of transmission frame, describe the method for designing of the configuration information of multimedia service and data service.
Background technology
The core of communication system is how to improve efficiency of transmission and reliability in limited bandwidth, in order to improve reliability, can use error correcting code efficiently in system usually, and in order to improve the availability of frequency spectrum, can adopt high order modulation, transmits more Polymera.
Digital audio broadcasting DAB standard is the international standard that is used for digital audio broadcasting that the eighties of last century International Organization for Standardization nineties is formulated, use convolution code as error correcting code, and used convolution code to add the RS sign indicating number in the T-DMB that on the DAB basis, grows up (T-DMB) system as error correcting code.Ground mobile multimedia broadcast T-MMB then is on the basis of DAB and T-DMB standard, by adding a kind of standard of DMB efficiently newly that block encoding efficiently (as the LDPC coding) and high order modulation realize.
If but directly use new block coding method to replace convolution code in the DAB system, can exert an influence to the part of DAB system except that coding, and also have the problem that can't correctly discern block encoding piece position at receiving terminal, therefore need additional specific indication information.
DAB and T-DMB adopt the DQPSK modulation, when adopting high order modulation (as 8DPSK or 16DAPSK modulation), need in transmission frame, come modulation system is indicated, otherwise receiving terminal can't correctly be discerned the CU size of MSC (MSC) sub-channels and carry out the demodulation of sub-channel data by certain bits.
If adopt advanced sound, video coding mode and data description, also need indication to a kind of new system business characteristic of receiving terminal.
These all need to describe by newly-increased some FIG in the FIC of transmission frame or the definition of expanding some specific identifier among original FIG coded system, modulation system and some other characteristic of new business.
The transmission frame-form of T-MMB system as shown in Figure 1, the structure of transmission frame and length all depend on transmission mode.The T-MMB transmission system is made up of three channels, is respectively synchronizing channel, FIC and MSC.Wherein synchronizing channel is mainly used to basic demodulation effect, and is synchronous as transmission frame, automatically FREQUENCY CONTROL, channel status estimation and transmitter identification.MSC is used for transmitting audio frequency, video and data service composition.And system multiplexing configuration information (MCI) that receiver need be discerned and data traffic information (SI) all are to transmit by FIC.
FIC is made up of a plurality of FIB, and the transmission frame of each pattern has the FIB of respective numbers, and FIB is made up of FIG, long 256 bits of FIB, as shown in Figure 2.FIG has polytype, and every type also has multiple expansion, all uses the different extended descriptions of FIG type 0 as MCI and part SI, and the structure of FIG type 0 as shown in Figure 3.
During FIG has used 8 types at present in the up-to-date standard (ETSI EN 300 401 V1.4.1 (2006-06)) of DAB 6 kinds, type 3 and 4 is undefined.Type 0 has 32 kinds of expansions, has used 25 kinds at present, and wherein FIG0/15 is undefined, and FIG0/30 is former to be used for satellite communication, and existing do not have a definition.
Summary of the invention
The objective of the invention is to describe coded system, modulation system and some other characteristic of new business, realize a kind of multi-media broadcasting system of Compatiable DAB by newly-increased some FIG in the FIC of transmission frame or the definition of expanding some specific identifier among original FIG.
The invention provides the method for designing of the newly-increased configuration of FIC in a kind of T-MMB system that is applied to Compatiable DAB, comprising:
The subchannel characteristic of T-MMB business is described in the expansion of a newly-increased FIG type;
Expand among the FIG0/2 definition to audio service component type (ASCTy) and DSCTy (DSCTy);
Expand among the FIG0/13 definition to user's application message (User Application Type) and user's application data (UserApplication Data);
The positional information of block encoding piece is described in the expansion of a newly-increased FIG type.
According to above-mentioned method for designing, it is characterized in that further comprising: the expansion of a newly-increased FIG type, realize modulation system, coded system, protection level and the indications such as sub-channel size, original position of the subchannel of T-MMB business.
According to above-mentioned method for designing, it is characterized in that further comprising: first byte of data area (data field) of newly-increased FIG is of the same type 0, and the zone of certain expansion thereafter is own to be defined; The data area is selected at least one of group that FIG type 0 expansion 15,0 expansion 30 of FIG type, 0 expansion 7 of FIG type, 0 expansion 12 of FIG type, 0 expansion 20 of FIG type, 0 expansion 23 of FIG type, 0 expansion 29 of FIG type, FIG type 3, FIG type 4 form; Use FIG type 0 expansion 15-FIG0/15 at present.
According to above-mentioned method for designing; it is characterized in that further comprising: in newly-increased FIG0/15, should comprise: SubChId (subchannel identifier); Start Address (initial address); Modu Type (modulation type); CodingType (type of coding); PL (protection level), Sub-channel Size (sub-channel size) field.
According to above-mentioned method for designing, it is characterized in that further comprising: in FIG0/15, defined a sign ModuType, be used to indicate the modulation system of newly-increased T-MMB business, supported DQPSK, 8DPSK and 16DAPSK modulation.
According to above-mentioned method for designing, it is characterized in that further comprising: in FIG0/15, defined a sign CodingType, be used to indicate the coded system of newly-increased T-MMB business, supported cascaded code and the LDPC coding of convolution and RS.
According to above-mentioned method for designing, it is characterized in that further comprising: in the FIG of DAB type 0 mode of extension 2-FIG0/2, expand the audio service component type (ASCTy) of T-MMB business and the definition of DSCTy (DSCTy).
According to above-mentioned method for designing, it is characterized in that further comprising: in the FIG of DAB type 0 mode of extension 13-FIG0/13, expand the definition of user's application type (UserApplication Type) and the Video service type in user's application data (User Application Data).
According to above-mentioned method for designing, it is characterized in that further comprising: the expansion of a newly-increased FIG type, the block encoding piece positional information when describing T-MMB business FEC coding.Use FIG type 0 expansion 30-FIG0/30 at present.
According to above-mentioned method for designing, it is characterized in that further comprising: in newly-increased FIG0/30, should comprise: SubChId (subchannel identifier), FEC StartAddress (FEC original position) field.
According to above-mentioned method for designing, it is characterized in that further comprising: the sign FEC Start Address (FEC original position) that in FIG0/30, has defined one 7 bit binary number, being used for indicating corresponding C IF to belong to the side-play amount of first encoding block of this subchannel with respect to this subchannel initial address, is unit with CU.
According to above-mentioned method for designing, it is characterized in that further comprising: send among newly-increased FIG0/30 first FIB in several FIB of corresponding each CIF.
Description of drawings
Fig. 1 is the transmission frame-form figure of the T-MMB system of Compatiable DAB.
Fig. 2 is FIB (FIB) structure chart of the T-MMB system of Compatiable DAB.
Fig. 3 is the structure chart of FIG type 0 of the T-MMB system of Compatiable DAB.
Fig. 4 is the FIC of the T-MMB system application drawing of Compatiable DAB.
Fig. 5 is the T-MMB system principle diagram of Compatiable DAB.
Fig. 6 is the configuration structure of FIG0/15 of MMB traffic sub channel information of describing the T-MMB system of Compatiable DAB among the FIC.
Fig. 7 is the configuration structure of FIG0/2 of basic service tissue of describing the T-MMB system of Compatiable DAB among the FIC.
Fig. 8 is the configuration structure of FIG0/13 of user's application message of describing the T-MMB system of Compatiable DAB among the FIC.
Fig. 9 is the configuration structure of the FIG0/30 of the flexible block encoding of the T-MMB system of description realization Compatiable DAB among the FIC.
Embodiment
The FIC of the T-MMB system application drawing of the Compatiable DAB that the present invention relates to as shown in Figure 4.
The concrete theory diagram of the T-MMB system of Compatiable DAB as shown in Figure 5.
The T-MMB system that the present invention relates to can Compatiable DAB and realizes multiple modulation system and coded system, specifically describes with the FIG among the FIC, wherein:
One, describes the subchannel information of T-MMB business by newly-increased FIG0/15, increase the indication of modulation system, coded system and the protection level of T-MMB business.As shown in Figure 6, concrete implication is:
-SubChId (subchannel identifier): the signless binary number of this 6 bit is used for identifying certain subchannel.
-Start Address (initial address): this 10 bit regions is encoded to signless binary number (scope 0 to 863), the address of pointing out first capacity unit (CU) in the subchannel.
-ModuType (modulation type): this 2 bit is used to refer to the DQPSK/8DPSK/16DAPSK modulation system, and is as follows:
00：DQPSK；
01：8DPSK；
10：16DAPSK；
11: keep.
-CodingType (type of coding): this 1 bit is used to refer to channel coding method, and is as follows:
0: convolutional encoding and RS;
I：LDPC。
-Rfu: this 1 bit is that interpolation in the future keeps.Be made as 0 at present.
-Sub-channel field (subchannel district): this 12 bit has been indicated the size and the chnnel coding code check of subchannel.
-PL (protection level): this 2 bit has been indicated the chnnel coding code check, and is as follows:
00: protection level 1-C;
01: protection level 2-C;
Other be that in the future use keeps.
-Sub-channel size (sub-channel size): this 10 bit regions coding
Be signless binary number (scope 1 to 864), provided the capacity unit number that the subchannel that draws according to modulation system and protection level takies.
Work as ModuType=00, expression is provided by table 1 with DQPSK modulation, corresponding sub-channel size.
The subchannel data size of table 1 different coding speed,
Data rate is 32 n kbit/s (n is 〉=1 integer)
| Protection level | 1-C | ?2-C |
| The chnnel |
1/2 | ?2/3 |
| Sub-channel size (CUs) | 24n | ?18n |
Work as ModuType=01, expression is provided by table 2 with 8DPSK modulation, corresponding sub-channel size.
The subchannel data size of table 2 different coding speed,
Data rate is 32 n kbit/s (n is 〉=1 integer)
| Protection level | 1-C | ?2-C |
| The chnnel |
1/2 | ?2/3 |
| Sub-channel size (CUs) | 16n | ?12n |
Work as ModuType=10, expression is provided by table 3 with 16DAPSK modulation, corresponding sub-channel size.
The subchannel data size of table 3 different coding speed,
Data rate is 32 n kbit/s (n is 〉=1 integer)
| Protection level | 1-C | ?2-C |
| The chnnel |
1/2 | ?2/3 |
| Sub-channel size (CUs) | 12n | ?9n |
Two, by expanding among the FIG0/2 description to basic service tissue, new audio coding mode and the data service type of differentiation T-MMB system, as shown in Figure 7.
Describe below in FIG0/2, increasing newly:
-ASCTy (audio service component type): the type of the professional composition of this 6 bit regions indicative audio.Be defined as follows (remaining type keeps for using in the future):
000011：MPEG-4?HE?AAC?V2?HE-AAC；
000100：MPEG-4?ER-BSAC。
-DSCTy (DSCTy): the type of the professional composition of this 6 bit designation data.This part specific explanations is seen TS 101 756, the definition of table 2.Be defined as follows:
The indication of 011001:T-MMB system.
Three, by expanding among the FIG0/13, distinguish user's application type and user's application data of T-MMB system, as shown in Figure 8 to the description of user's application message.
Describe below in FIG0/13, adding:
-User Application Type (user's application type): this 11 bit has provided needs the user of decoding to use, and these application are identified by professional label (SId) and professional composition label (SCId), and it defines with reference to TS 101 756 tables 16.In the new system this option is expanded, specific as follows:
The business of 0x00b:T-MMB system
-User Application data (user's application data): this m*8 Bit data is used for transmission user application message data, is determined by user's application type during decoding.The Video service framework 1 of T-MMB system, framework 2 can be respectively identified by service attribute VideoServiceObjectProfileId=0x01, the VideoServiceObjectProfileId=0x02 of system.
When four, the subchannel application packet at the professional place of T-MMB being encoded, can be in transmission frame by the indication of newly-increased FIG0/30, as shown in Figure 9 as T-MMB traffic packets encoding block original position.FIG0/30 sends in corresponding to first FIB among several FIB of each CIF.The information that provides comprises:
-SubChId (subchannel identifier): this 6 bit regions is encoded to signless binary number, is used for identifying certain subchannel;
-Rfu: this 3 bit is to use in the future to keep, and is set to 0 at present;
-FEC Start Address (FEC initial address): this 7 bit regions is encoded to signless binary number, is used to refer to the initial address that belongs to first encoding block of this subchannel in the corresponding public interleaving frame.This address is the side-play amount with respect to the subchannel initial address, is unit (0-71) with CU.When not having FEC encoding block initial in certain subchannel, these 7 all are changed to 1.
The positional information of the block encoding piece that FEC is relevant with current CIF number relevant, a coding groups will be divided in three CIF and transmitted in this example, the information that FIG0/30 is correlated with is respectively:
CIF?Count：0
SubChId：0
FEC?Start?Address：4
CIF?Count：1
SubChId：0
FEC Start Address:127 (7 complete 1)
CIF?Count：2
SubChId：0
FEC?Start?Address：7
Claims (13)
1. the present invention proposes a kind of newly-increased method for designing that disposes of FIC that is applied to the T-MMB system of Compatiable DAB, comprising:
The subchannel characteristic of T-MMB business is described in the expansion of a newly-increased FIG type;
Expand among the FIG0/2 definition to audio service component type (ASCTy) and DSCTy (DSCTy);
Expand among the FIG0/13 definition to user's application message (User Application Type) and user's application data (User Application Data);
The positional information of T-MMB traffic packets encoding block is described in the expansion of a newly-increased FIG type.
2. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 1; it is characterized in that further comprising: the expansion of a newly-increased FIG type, realize modulation system, coded system, protection level and the indications such as sub-channel size, original position of the subchannel of T-MMB business.
3. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 2, it is characterized in that further comprising: first byte of data area (data field) of newly-increased FIG is of the same type 0, and the zone of certain expansion thereafter is own to be defined; The data area is selected at least one of group that FIG type 0 expansion 15,0 expansion 30 of FIG type, 0 expansion 7 of FIG type, 0 expansion 12 of FIG type, 0 expansion 20 of FIG type, 0 expansion 23 of FIG type, 0 expansion 29 of FIG type, FIG type 3, FIG type 4 form; Use FIG type 0 expansion 15-FIG0/15 at present.
4. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 2; it is characterized in that further comprising: newly-increased FIG should comprise: SubChId (subchannel identifier); Start Address (initial address); ModuType (modulation type); CodingType (type of coding); PL (protection level), Sub-channel Size (sub-channel size) field.
5. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 2, it is characterized in that further comprising: defined a sign ModuType, be used to indicate the modulation system of newly-increased T-MMB business, support DQPSK, 8DPSK and 16DAPSK modulation.
6. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 2, it is characterized in that further comprising: defined a sign CodingType, be used to indicate the coded system of newly-increased T-MMB business, support cascaded code and the LDPC coding of convolution and RS.
7. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 1, it is characterized in that further comprising: in the FIG of DAB type 0 mode of extension 2-FIG0/2, expand the audio service component type (ASCTy) of T-MMB business and the definition of DSCTy (DSCTy).
8. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 1, it is characterized in that further comprising: the definition of in the FIG of DAB type 0 mode of extension 13-FIG0/13, expanding user's application type (UserApplication Type) and the middle Video service type of user's application data (User Application Data).
9. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 1, it is characterized in that further comprising: the expansion of a newly-increased FIG type, the block encoding piece positional information when describing the professional FEC coding of T-MMB.
10. according to the method for designing of the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 9, it is characterized in that further comprising: first byte of data area (datafield) is of the same type 0, and the zone of certain expansion thereafter is own to be defined; The data area is selected at least one of group that FIG type 0 expansion 15,0 expansion 30 of FIG type, 0 expansion 7 of FIG type, 0 expansion 12 of FIG type, 0 expansion 20 of FIG type, 0 expansion 23 of FIG type, 0 expansion 29 of FIG type, FIG type 3, FIG type 4 form; Use FIG type 0 expansion 30-FIG0/30 at present.
11. method for designing according to the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 9, it is characterized in that further comprising: newly-increased FIG should comprise: SubChId (subchannel identifier), FEC Start Address (FEC original position) field.
12. method for designing according to the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 9, it is characterized in that further comprising: the sign FEC Start Address (FEC original position) that has defined one 7 bit binary number, being used for indicating corresponding public interleaving frame (CIF) to belong to the side-play amount of first encoding block of this subchannel with respect to this subchannel initial address, is unit with capacity unit (CU).
13. the method for designing according to the newly-increased configuration of FIC of the T-MMB system of the described Compatiable DAB of claim 9 is characterized in that further comprising: send among the expansion of newly-increased FIG type first FIB in several FIB of corresponding each CIF.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100990543A CN101022556A (en) | 2006-07-17 | 2006-07-17 | FIC new allocation design method in T-MMB system compatible DAB |
| CN 200710130307 CN101132243B (en) | 2006-07-17 | 2007-07-16 | Design method for FIC new configuration in T-MMB system compatible with DAB |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100990543A CN101022556A (en) | 2006-07-17 | 2006-07-17 | FIC new allocation design method in T-MMB system compatible DAB |
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| Publication Number | Publication Date |
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| CN101022556A true CN101022556A (en) | 2007-08-22 |
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| CNA2006100990543A Pending CN101022556A (en) | 2006-07-17 | 2006-07-17 | FIC new allocation design method in T-MMB system compatible DAB |
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