1、 547082011 DRM (DCP) 27 2002 . 184- , 1.02004 . 1 - ( ) - , - - ( -)2 3 13 2011 . 869-4 - (ET) (DRM). (DCP) (ETSI TS 102 821 v1.3.1 (201012)Digital Radio Mondiale (DRM); Distribution and Communications Protocol (DCP)5 , - . () . - , , 2012 , - - II 5470820111 .12 13 , .14 .24.1 24.2 24.2.1 TAG,AFPFT
2、 .45 TAG 45.1 TAG .45.1.1 .55.2 TAG .55.2.1 TAG 55.2.2 TAG.65.2.2.1 ,*ptr 65.2.2.1.1 75.2.2.2 ,*dmy76 .76.1 AF 76.2 .87 PFT 87.1 PFT.97.2 107.2.1 107.2.2 107.3 117.3.1 -117.3.2 127.3.3 .137.4 .137.4.1 .137.4.2 .147.4.3 147.4.4 - 14() CRC.15() 16.1 16.1.1 UDP/IP 16.2 16.3 .16.3.1 IO(fio_) 16III 54708
3、2011.3.1.1 AF /PFT (afpf) .17.3.1.2 (time) 17 () .18.1 DCP UDP/IP .19.2 DCP () 19.3 DCP / IO 19.4 DCP TCP/IP .20 () DCP DCP 21.1 DCP 21.1.1 DCP 21.1.2 DCP 21.1.3 DCP 21.2 DCP .21.2.1 AFRevision 21.2.2 AFMaxLen 21.2.3 PFTMaxLen .22.2.4 PFTMaxFragCnt.22.2.5 PFTMaxAFFragCache .22 () DCP .23.1 23.2 AF .
4、23.3 23 () DCP .24.1 .24.1.1 .24.1.2 24.1.2.1 .24.1.2.2 .25.1.2.3 / 25.2 DCP 25.2.1 25.2.2 26.2.2.1 ( “*tsq”, “*tss”)26.2.2.2 ( “*tfq”, “*tfs”) .26.2.2.3 / ( “*tuq”/“*tnq”, “*tus”/“*tns”). ( “*tdq”, “*tds”) .27.2.3 .27.2.4 28.2.4.1 , TAG 28.2.4.2 2830IV 547082011ETSI TS 102 821 v1.3.1 (201012) (JTC)
5、 - (EBU), (CENELEC) (ETSI). , . - , , -, . , , - . DRM, , - , , DRM, , .V 547082011 DRM (DCP)Digital audio broadcasting system DRM.Distribution and communication protocol (DCP) 201209011 DRM, ETSI 1. DRM , (), .2 .3 , , 3.1 :3.1.1 (byte): 8 .3.1.2 (Distribution and Communication Protocol;DCP): , , /
6、 - - .3.1.3 (Application Framing; AF): DCP, - TAG .3.1.4 AF (AF Packet): TAG , .3.1.5 TAG (TAG Value): TAG .3.1.6 TAG (TAG Name): TAG , - .3.1.7 TAG (TAG Packet): TAG , .3.1.8 TAG (TAG Item): DCP , - , .3.2 :N N, . , 216 42;1 547082011 c233c249x , , .;c235c251x , , . ;xy y;MIN a,z .3.3 :AF(Applicati
7、onFraming(aDCPProtocolLayer) (DCP);ASCII(American StandartCode for Information Interchange) 8- ;CRC (Cyclic Redundancy Check) ( );DCP (Distribution and Communication Protocol) ;DRM (Digital Radio Mondiale) ;FC (Forward Error Correction) ;IP (Internet Protocol) -;LSb (Least Significant bit) ;LSB (Lea
8、st Significant Byte) ;MSb (Most Significant bit) ;MSB (Most Significant Byte) ;MTU (Maximum Transmit Unit) ;PFT (Protection, Frangmentation and Transportation) , , ; (point-to-point protocol) ;RS (Reed Solomon) -;TAG (Tag, Length, Value) , , ;TCP (Transmission Control Protocol) , , TCP/IP;UDP (User
9、Datagram Protocol) . , , :- , , ;- , , ;- (MSb) . -, MSb “b7” , (LSb) “b0”;- ( ) . (MSb LSb ) . , , MSb.4 4.1 , . () - . , . DCP . - .4.2 , 1.2 547082011 . TAG - , AF . () PFT - AF (FEC). AF PFT , ( ) ,UDP/IP . 2.3 547082011 1 DCP 2 DCP , PFT , - .4.2.1 TAG , AF PFT 3.5 TAG TAG DCP. TAG TAG - . TAG TAG, . , , TAG DCP, , , PFT Ethernet . .5.1 TAG TAG , TAG , - . TAG , -, .TAG ( 4) 7 TAG - , , . 4 547082011 3 TAG , AF PFT 4 TAG . TAG 8 , TAG . 7 , TAG *dmy 5.2.2.2. TAG , TAG : , AF , . ,TAG , , .5.1.1 , TAG TAG - . , TAG . , TAG TAG . TAG , TAG , .
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