1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58using 6,35 mm magnetic tape Format D-7 Part 3: Data stream formatThe European Standard EN 62071-3:2
2、006 has the status of a British StandardICS 33.160.40Helical-scan compressed digital video cassette system BRITISH STANDARDBS EN 62071-3:2006BS EN 62071-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006ISBN 0 580
3、49479 9Amendments issued since publicationAmd. No. Date Commentsits secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Na
4、tional forewordThis British Standard was published by BSI. It is the UK implementation of EN 62071-3:2006. It is identical with IEC 62071-3:2005. This standard, together with BS EN 62071-1:2006 and BS EN 62071-2:2006 supersedes BS EN 62071:2001, which will be withdrawn on 1 June 2009.The UK particip
5、ation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment.A list of organizations represented on EPL/100 can be obtained on request to EUROPEAN STANDARD EN 62071-3 NORME EUROPENNE EUROPISCHE NORM July 2006 CENELEC European Committee for
6、Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
7、Ref. No. EN 62071-3:2006 E ICS 33.160.40 English version Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape - Format D-7 Part 3: Data stream format (IEC 62071-3:2005) Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une bande magntiqu
8、e de 6,35 mm - Format D-7 Partie 3: Format du flux de donnes (CEI 62071-3:2005) Videokassettensystem mit komprimierter digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm - Format D-7 Teil 3: Datenstromformat (IEC 62071-3:2005) This European Standard was approved by CENELEC on 2006-06-01. CENELEC
9、 members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on appl
10、ication to the Central Secretariat or to any CENELEC member. This European Standard exists in two official versions (English and German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has
11、 the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway
12、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of the International Standard IEC 62071-3:2005, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the formal vote and was approved by CENELE
13、C as EN 62071-3 on 2006-06-01 without any modification. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2007-06-01 latest date by which the national standards conflicting with
14、 the EN have to be withdrawn (dow) 2009-06-01 _ Endorsement notice The text of the International Standard IEC 62071-3:2005 was approved by CENELEC as a European Standard without any modification. _ 2 EN 62071-3:2006CONTENTS 1 Scope.4 2 Normative references4 3 Abbreviations and acronyms .4 4 Identifi
15、cation within the serial data transport interface (SDTI) 5 4.1 SDTI header packet data .5 4.2 Payload .5 5 Stream block format .5 5.1 Reserved data words .6 5.2 Signal type words 6 5.3 Transmission type word .8 5.4 DIF block ID words 9 5.5 DIF block data words .9 5.6 Error correction code (ECC) word
16、s.9 6 Transmission order.10 7 Mapping structure.13 7.1 Channel unit 13 7.2 Mapping rules13 Annex A (informative) Block diagram of D-7 recorder22 Figure 1 Stream block format .6 Figure 2 Signal type (ST) word mapping .6 Figure 3 Transmission type (TT) word mapping 8 Figure 4 Mapping of DIF block ID .
17、9 Figure 5 Mapping of ECC .10 Figure 6 Transmission order in one frame for the 50 Mb/s structure 11 Figure 7 Transmission order in one frame for the 25 Mb/s structure 11 Figure 8 Transmission order in a DIF sequence12 Figure 9 Channel unit mapping for the 25 Mb/s structure (525/60 SDTI system) 15 Fi
18、gure 10 Channel unit mapping for the 25 Mb/s structure (625/50 SDTI system) .16 Figure 11 Channel unit mapping in a synchronized multichannel units transmission (525/60 SDTI system) .18 Figure 12 Channel unit mapping in a synchronized multichannel units transmission (625/50 SDTI system) .19 Figure 1
19、3 Channel unit mapping for the 50 Mb/s structure (525/60 SDTI system) 20 Figure 14 Channel unit mapping for the 50 Mb/s structure (625/50 SDTI system) 21 Figure A.1 Block diagram of D-7 recorder .22 Table 1 Start lines of channel units.17 3 EN 62071-3:2006HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSET
20、TE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D-7 Part 3: Data stream format 1 Scope This part of IEC 62071 defines the format of the data stream for the synchronous exchange of DV-based audio, data, and compressed video (whose data structure is defined in SMPTE 314M) over the interface defined in SM
21、PTE 305M. It covers the transmission of audio, subcode data and compressed video packets associated with DV-based 25 and 50 Mb/s data structures including faster-than-real-time transmission for 525/60 SDTI and 625/50 SDTI systems. This standard does not include the data stream of a DV-compressed str
22、ucture as defined in SMPTE 322M. Space within SMPTE 305M not used by a data stream conforming to this standard may be used for the transmission of data other than those representing DV-based audio, data and compressed video. In this standard, the 60 Hz system refers to the field frequency 59,94 Hz s
23、ystem and the 50 Hz system refers to the field frequency 50,0 Hz system. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the reference
24、d document (including any amendments) applies. SMPTE 305M: 2005, Television Serial Data Transport Interface SMPTE 314M: 1999, Television Data Structure for DV-Based Audio, Data and Compressed Video 25 and 50 Mb/s SMPTE 322M: 2004, Television Format for Transmission of DV Compressed Video, Audio and
25、Data Over a Serial Data Transport Interface 3 Abbreviations and acronyms DIF: Digital interface DVF: DIF valid flag ECC: Error correction code FF: Field/frame frequency flag FSNF: Frame sequence number flag SDI: Serial digital interface SDTI: Serial data transport interface ST: Signal type STVF: Sig
26、nal type of video frame TRF: Transmission rate flag TT: Transmission type 4 EN 62071-3:20064 Identification within the serial data transport interface (SDTI) 4.1 SDTI header packet data The header packet data words of the serial data transport interface (SDTI) associated with this data stream format
27、 shall conform to SMPTE 305M. When the SDTI interface is transporting a data stream conforming to this standard, the block type word within the SDTI header packet shall have the value 173hfor transported data contained in fixed-size blocks when ECC (error correction code) is used and the value 233hw
28、hen ECC is not used. 4.2 Payload The payload is composed of consecutive fixed-size blocks (see Figure 1). The SDTI data type word shall identify the data type of this payload with the value 221h. 5 Stream block format The stream block format is shown in Figure 1. The length of each stream block is 1
29、70 words, including a secondary header, two DIF (digital interface) block IDs, two DIF block data (of stream data) and an ECC block. The secondary header contains reserved data words, signal type words, and a transmission type word. The complete word structure of the stream block for a compressed vi
30、deo data stream is defined below: Reserved data : 3 words Signal type : 2 words Transmission type : 1 word DIF block ID : 3 words DIF block data : 77 words DIF block ID : 3 words DIF block data : 77 words ECC : 4 words 5 EN 62071-3:2006170 wordsStream blockSDTI data type 1 word PayloadAncillary data
31、 E A V Header Data Space S A V FixedblockFixedblockFixedblockFixed block Space ( from SMPTE 305M, table 2) Reserved data ST TT Word (3 words) (3 words) (77 words) (3 words) (77 words) (4 words) DIF block ID DIFblockdataDIFblockIDDIFblockdataECC Signal type (2 words) Transmission type(1 words) 0 1 2
32、3 4 5 6 7 8 9 85 86 87 88 89 169 Figure 1 Stream block format 5.1 Reserved data words The reserved data words shall consist of 3 words and be positioned at the start of the stream block. The default value for the reserved data is 200h. 5.2 Signal type words The signal type word (ST) mapping is shown
33、 in Figure 2. The signal type words shall consist of two words. The first word of ST (word 3) includes the specific type of video frame ID (STVF ID). The second word of ST (word 4) includes the field/frame frequency flag (FF), the DIF structure format, the DIF valid flag (DVF), the frame sequence nu
34、mber flag (FSNF), the transmission rate flag (TRF) and reserved bits. B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 Word 3 EP EP STVF ID Word 4 FF DIF structure Re FSNF TRF ReservedDVFEP EP Figure 2 Signal type (ST) word mapping IEC 1941/05 IEC 1942/05 6 EN 62071-3:2006Word 3 of ST The STVF ID shows information mai
35、nly related to pictures that have been 3:2 pull-down converted from 480 line/ 29,98 frame rate progressive pictures. In the 525/60 SDTI system, the following applies: Bits B7 through B3 are reserved bits and shall be set to 00000bas default values. Bits B2 through B0 indicate the specific type of vi
36、deo frame ID which shows the type of the converted picture with the following values: B2 B1 B0 Original Converted 0 0 0 : 480i / 29,97 - No change 0 0 1 : 480p / 29,97 - Segmented frame (see note) 0 1 0 : 480p / 23,98 - No field sequence ID (3:2 pull down) 0 1 1 : 480p / 23,98 - A frame (3:2 pull do
37、wn) 1 0 0 : 480p / 23,98 - B frame (3:2 pull down) 1 0 1 : 480p / 23,98 - C frame (3:2 pull down) 1 1 0 : 480p / 23,98 - D frame (3:2 pull down) 1 1 1 : 480p / 23,98 - E frame (3:2 pull down) NOTE Odd lines of 480p/29,97 are mapped to the first field and even lines of 480p/29,97 are mapped to the se
38、cond field. In the 625/50 SDTI system, the following applies: All values of bits B7 through B0 are set to 00has default values. Bit B8 of word 3 is equal to the even parity of B7 through B0. Bit B9 of word 3 is equal to the complement of B8. Word 4 of ST Bit B7 indicates the field frequency of seria
39、l digital interface (SDI) with the following values: B7 0 : 60 Hz (59,94 Hz) 1 : 50 Hz Bits B6 through B4 indicate the DIF structure with the following values: B6 B5 B4 0 0 0 : Reserved 0 0 1 : Reserved 0 1 0 : Reserved 0 1 1 : 25 Mb/s structure 1 0 0 : Reserved 1 0 1 : 50 Mb/s structure 1 1 0 : Res
40、erved 1 1 1 : Reserved Bit B3 is reserved bit and shall be set to 0b as default value. 7 EN 62071-3:2006Bit B2 is the DIF valid flag (DVF) and indicates the validity of the DIF data mapped into SDTI. B2 0 : invalid 1 : valid Bit B1 is the frame sequence number flag (FSNF) and indicates the validity
41、of the frame sequence number (see 5.3) with the following values: B1 0 : valid 1 : invalid Bit B0 is the transmission rate flag (TRF) and indicates the validity of the transmission rate (see 5.3) with the following values: B0 0 : valid 1 : invalid Bit B8 is equal to the even parity of B7 through B0.
42、 Bit B9 is equal to the complement of B8. 5.3 Transmission type word The transmission type word (TT) mapping is shown in Figure 3. The transmission type word shall consist of one word including the frame sequence number and the transmission rate. B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 Word 5 EP EP Frame sequ
43、encenumberTransmission rateFigure 3 Transmission type (TT) word mapping Bits B7 through B4 indicate the frame sequence number with the following values: 0h: 1 1h: 2 | Fh : 16 The frame sequence number identifies frames multiplexed within an SDTI frame. Bits B3 through B0 indicate the transmission ra
44、te with the following values: 0h: 1 x (normal transmission rate) (see note) 1h: 2 x 2h: 3 x 3h: 4 x 4h: 5 x 5h: 6 x 6h: 7 x7h: 8 x8h Eh: reserved Fh: 16 x IEC 1943/05 8 EN 62071-3:2006NOTE The multiple of the normal transmission rate is represented by x. The normal transmission rate corresponding to
45、 normal reproduction of the television picture is 1 x. Bit B8 is equal to the even parity of B7 through B0; Bit B9 is equal to the complement of B8. 5.4 DIF block ID words The DIF block ID (ID0-2) shall consist of three words, contained in bits A23 through A0 as shown in Figure 4. The lower 8-bit po
46、rtion of these three words is specified in SMPTE 314M. B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 Word 6 and 86 Word 7 and 87 EP2 EP1 EP3 EP2EP1EP3A15A7A23A14A6A22A10A2A18A9 A1 A17 A8 A0 A16 A13A5A21A12A4A20A11A3A19Word 8 and 88 Figure 4 Mapping of DIF block ID EP1 is equal to the even parity of bits A7 through
47、A0; EP2 is equal to the even parity of bits A15 through A8; EP3 is equal to the even parity of bits A23 through A16; and EP1 is equal to the complement of EP1; EP2 is equal to the complement of EP2; EP3 is equal to the complement of EP3. 5.5 DIF block data words The DIF block data shall consist of 7
48、7 words. The lower 8 bits of each DIF block word represent the DIF block data, as specified in SMPTE 314M; the higher 2 bits are parity data. Bits B7 through B0 are DIF block data; Bit B8 is equal to the even parity of B7 through B0; Bit B9 is equal to the complement of B8. 5.6 Error correction code
49、 (ECC) words Bits B7 through B0 of the words within a stream block (including reserved data words, the ST word, the TT word and all words of the DIF block ID and DIF block data) are optionally protected by an error correction code (ECC). The ECC shall consist of four words and be inserted at the end of the stream block. The error correction code is a (170,166) Reed-Solomon code in GF(256), whose field genera
