1、 INTERNATIONAL STANDARD IEC 62447-3First edition 2007-06Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-12 Part 3: Data stream format Reference number IEC 62447-3:2007(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All ri
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8、First edition 2007-06Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-12 Part 3: Data stream format R For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 62447-3 IEC:2007(E) CONTE
9、NTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Abbreviations and acronyms.5 4 Identification within the serial data transport interface (SDTI) 6 4.1 SDTI header packet data.6 4.2 Payload.6 5 Stream block format .6 5.1 Stream block .6 5.2 Reserved data words.7 5.3 Signal type words7 5.4 Transmi
10、ssion type word.9 5.5 DIF block ID words9 5.6 DIF block data words.10 5.7 ECC words 10 6 Transmission order.11 7 Mapping structure.13 7.1 Channel unit13 7.2 Mapping rules13 Annex A (informative) Block diagram of D-12 recorder.18 Bibliography19 Figure 1 Stream block format.7 Figure 2 ST word mapping
11、.7 Figure 3 TT word mapping .9 Figure 4 Mapping of DIF block ID.9 Figure 5 Mapping of ECC.10 Figure 6 Transmission order in one frame for the 100 Mb/s structure .11 Figure 7 Transmission order in a DIF sequence .12 Figure 8a For 270 Mb/s system14 Figure 8b For 360 Mb/s system15 Figure 8 Channel unit
12、 mapping for the 100 Mb/s structure (525/60 SDTI system).15 Figure 9a For 270 Mb/s system16 Figure 9b For 360 Mb/s system17 Figure 9 Channel unit mapping for the 100 Mb/s structure (625/50 SDTI system).17 Figure A.1 Block diagram of D-7 recorder 18 Table 1 Start lines of channel units 17 62447-3 IEC
13、:2007(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D-12 Part 3: Data stream format FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising a
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22、 costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct ap
23、plication of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62447-3 has been prepared by IEC
24、technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: CDV Report on voting 100/1093/CDV 100/1188/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in
25、 the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 62447-3 IEC:2007(E) The list of all the parts of the IEC 62447 series, under the general title Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-12 can be
26、 found on the IEC website. This part 3 describes the specifications for transmission of DV-based compressed video and audio data stream over 270 Mb/s and 360 Mb/s serial digital interface. Part 1 describes the VTR specifications which are tape, magnetization, helical recording, modulation method and
27、 basic system data for video compressed data. Part 2 describes the specifications for encoding process and data format for 1080i, 1080p and 720p systems. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web s
28、ite under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. 62447-3 IEC:2007(E) 5 HELICAL-SCAN COMPRE
29、SSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D-12 Part 3: Data stream format 1 Scope This part of IEC 62447defines 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 370M) over th
30、e interface defined in SMPTE 305M. It covers the transmission of audio, subcode data and compressed video packets associated with DV-based 100 Mb/s data structures for 525/60 SDTI and 625/50 SDTI systems. Space within SMPTE 305M not used by a data stream conforming to this standard may be used for t
31、he 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 system and the 50 Hz system refers to the field-frequency 50,0 Hz system. 2 Normative references The following referenced documen
32、ts are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. SMPTE 305M.2-2000, Television Serial Data Transport Interface 3 Abbreviations and
33、 acronyms SDI Serial digital interface SDTI Serial data transport interface ECC Error correction code DIF Digital interface ST Signal type STVF Signal type of video frame FF Field/frame frequency flag DVF DIF valid flag FSNF Frame sequence number flag TRF Transmission rate flag TT Transmission type
34、6 62447-3 IEC:2007(E) 4 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 shall conform to SMPTE 305M. When the SDTI interface transports a da
35、ta stream conforming to this standard, the block type word within the SDTI header packet shall have the value 173h for transported data contained in fixed-size blocks when ECC is used and the value 233h when ECC is not used. 4.2 Payload The payload is composed of consecutive fixed-size blocks (see F
36、igure 1). The SDTI data type word shall identify the data type of this payload with the value 221h. 5 Stream block format 5.1 Stream block The stream block format is shown in Figure 1. The length of each stream block is 170 words, including a secondary header, two DIF (digital interface) block IDs,
37、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 video data stream is defined below. Reserved data : 3 words Signal type : 2 words
38、 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 62447-3 IEC:2007(E) 7 170 words Stream block SDTI data type 1 word Payload Ancillary data E A V Header data Space S A V Fixed block Fixed block Fixed block Fixe
39、d 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 DIF block data DIF block ID DIF block data ECC Signal type (2 words) Transmission type (1 word) 0 1 2 3 4 5 6 7 8 9 85 86 87 88 89 169 Figure 1 Stream block f
40、ormat 5.2 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. 5.3 Signal type words The signal type word (ST) mapping is shown in Figure 2. The signal type words shall consist of two
41、 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 number flag (FSNF), the transmission rate flag (TRF) and r
42、eserved 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 Reserved DVF EP EP Figure 2 ST word mapping IEC 940/07 IEC 941/07 8 62447-3 IEC:2007(E) a) Word 3 of ST The STVF ID shows information mainly related to pictures that have been 3:2 pull-down converted
43、 from 480 line/29,98 frame rate progressive pictures. All values of bits B7 through B0 are set to 00h as 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. b) Word 4 of ST Bit B7 indicates the field frequency of SDI with
44、the following values: B 7 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 : 100 Mb/s structure 1 1 1 : Reserv
45、ed Bit B3 is reserved bit and shall be set to 0b as default value. Bit B2 is the DVF and indicates the validity of the DIF data mapped into SDTI. B 2 0 : Invalid 1 : Valid Bit B1 is the FSNF and indicates the validity of the frame sequence number (see 4.3) with the following values: B 1 0 : Valid 1
46、: Invalid Bit B0 is the TRF and indicates the validity of the transmission rate (see 4.3) with the following values: B 0 0 : Valid 1 : Invalid Bit B8 is equal to the even parity of B7 through B0. Bit B9 is equal to the complement of B8. 62447-3 IEC:2007(E) 9 5.4 Transmission type word The TT word ma
47、pping is shown in Figure 3. The TT 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 sequence number Transmission rateFigure 3 TT word mapping Bits B7 through B4 indicate the frame sequence number with the f
48、ollowing values: 0 h : 1 1 h : 2 | F h : 16 The frame sequence number identifies frames multiplexed within an SDTI frame. Bits B3 through B0 indicate the transmission rate with the following values: 0 h: 1 x (normal transmission rate) (see note) 1 h : 2 x 2 h : 3 x 3 h : 4 x 4 h : 5 x 5 h : 6 x 6 h
49、: 7 x7h : 8 x8 h Eh: Reserved F h: 16 x NOTE The multiple of the normal transmission rate is represented by x. The normal transmission rate corresponding to 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. 5.5 DIF block ID words The DIF block ID (ID0-2) shall consist of three words, contained in bits
