1、 IEC 62071-1 Edition 1.0 2005-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-7 Part 1: VTR specifications Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une bande magntique
2、 de 6,35 mm Format D-7 Partie 1: Spcifications VTR IEC 62071-1:2005 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2005 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or me
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16、 csciec.ch. IEC 62071-1 Edition 1.0 2005-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-7 Part 1: VTR specifications Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une band
17、e magntique de 6,35 mm Format D-7 Partie 1: Spcifications VTR INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XD ICS 33.160.40 PRICE CODE CODE PRIX ISBN 978-2-83220-317-0 Registered trademark of the International Electrotechnical Commission Marque dpose de la Com
18、mission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 62071-1 IEC:2005 CONTENTS FOREWORD . 6 1 Scope . 8 2 Normative references 8
19、 3 Abbreviations and acronyms . 8 4 Environment and test conditions . 9 4.1 Environment 9 4.2 Reference tape 10 4.3 Calibration tapes . 10 5 Tape . 10 5.1 Base 10 5.2 Width 10 5.3 Width fluctuation 10 5.4 Reference edge straightness . 10 5.5 Tape thickness 11 5.6 Transmissivity . 11 5.7 Offset yield
20、 strength . 11 5.8 Magnetic coating . 11 5.9 Coating coercivity 11 6 Helical recordings . 11 6.1 Tape speed . 11 6.2 Sectors 11 6.3 Record locations and dimensions . 11 6.4 Helical track record tolerance zones 12 6.5 Relative positions of recorded information 12 6.6 Gap azimuth 22 7 Programme track
21、data 26 7.1 General . 26 7.2 Insert and track information (ITI) sector . 41 7.3 Audio sector 51 7.4 Video sector 56 7.5 Subcode sector 60 7.6 Edit gap . 63 8 Audio processing 64 8.1 General . 64 8.2 Encoding mode 64 8.3 Audio shuffling . 65 8.4 Audio auxiliary data (AAUX) . 66 8.5 Error correction c
22、ode addition 69 9 Video processing 71 9.1 General . 71 9.2 Compressed macro block and data-sync block . 71 9.3 Video auxiliary data (VAUX) . 72 9.4 Error correction code addition 76 62071-1 IEC:2005 3 10 Subcode processing . 77 10.1 General . 77 10.2 Subcode data 77 10.3 Error correction code additi
23、on 80 11 Longitudinal tracks 81 11.1 Control track 81 11.2 Cue track . 82 Annex A (normative) Tape tension 83 Annex B (normative) Track pattern during insert editing 84 Annex C (normative) Cross-tape track measurement technique 86 Annex D (normative) Frequency characteristics of F 0track . 89 Annex
24、E (informative) Relationship between tape length and recording time . 90 Annex F (informative) Block diagram of D-7 recorder 91 Bibliography 92 Figure 1 Locations and dimensions of recorded tracks of 25 Mb/s format 13 Figure 2 Locations and dimensions of recorded tracks of 50 Mb/s format 14 Figure 3
25、 Location of cue and control track record 15 Figure 4 Locations and dimensions of tolerance zones of helical track record of 25 Mb/s format 20 Figure 5 Locations and dimensions of tolerance zones of helical track record of 50 Mb/s format 21 Figure 6 A possible scanner configuration and tape wrap of
26、25 Mb/s format 24 Figure 7 A possible scanner configuration and tape wrap of 50 Mb/s format 25 Figure 8 Possible recording system configuration with digital interface port (informative) . 27 Figure 9 Sector arrangement on helical track 27 Figure 10 Frames and tracks (525/60 system of 25 Mb/s format)
27、 28 Figure 11 Frames and tracks (625/50 system of 25 Mb/s format) 28 Figure 12 A frame and tracks (525/60 system of 50 Mb/s format) 29 Figure 13 A frame and tracks (625/50 system of 50 Mb/s format) 29 Figure 14 Frequency characteristics of tracks . 34 Figure 15 Modulation for audio sector . 36 Figur
28、e 16 Modulation for video sector . 37 Figure 17 Modulation for subcode sector 38 Figure 18 Possible block diagram for signal processing 39 Figure 19 Bit stream before interleaved NRZI modulation 40 Figure 20 Pre-coding 40 Figure 21 Structure of ITI sector . 42 Figure 22 Structure of sync block of TI
29、A . 48 Figure 23 Structure of audio sector . 51 Figure 24 Structure of sync blocks in audio sector 52 Figure 25 Structure of video sector . 57 4 62071-1 IEC:2005 Figure 26 Structure of sync blocks in video sector 58 Figure 27 Structure of subcode sector 61 Figure 28 Structure of sync blocks in subco
30、de sector 62 Figure 29 Sample to audio data bytes conversion . 65 Figure 30 Arrangement of AAUX packs in audio auxiliary data 66 Figure 31 Data and inner parity of a data sync block . 70 Figure 32 Data and outer parity of a data sync block for audio sector 71 Figure 33 Relation between the compresse
31、d macro block number and the data-sync block 72 Figure 34 Arrangement . 73 Figure 35 Data and outer parity of a data sync block for video sector 77 Figure 36 Arrangement of subcode data . 78 Figure 37 Bit assignment for subcode data and parity . 81 Figure 38 Recorded control code waveform timing (52
32、5/60 system) 82 Figure 39 Recorded control code waveform timing (625/50 system) 82 Figure B.1 Typical track pattern during insert editing for 25 Mb/s format 84 Figure B.2 Typical track pattern during insert editing for 50 Mb/s format 85 Figure C.1 Correction factors (actual tape speed, tension) 87 F
33、igure C.2 Track location error plot for 25 Mb/s format (example) . 88 Figure C.3 Track location error plot for 50 Mb/s format (example) . 88 Figure C.4 Cross-tape measurement technique 88 Figure D.1 Frequency characteristics of F 0track 89 Figure F.1 Block diagram of D-7 recorder . 91 Table 1 Record
34、 locations and dimensions (525/60 system of 25 Mb/s format) . 16 Table 2 Record locations and dimensions (625/50 system of 25 Mb/s format) . 17 Table 3 Record locations and dimensions (525/60 system of 50 Mb/s format) . 18 Table 4 Record locations and dimensions (625/50 system of 50 Mb/s format) . 1
35、9 Table 5 Parameters for a possible scanner design of 25 Mb/s format 23 Table 6 Parameters for a possible scanner design of 50 Mb/s format 23 Table 7 Frames and servo information (525/60 system of 25 Mb/s format) 30 Table 8 Frames and servo information (625/50 system of 25 Mb/s format) 31 Table 9 A
36、frame and servo information (525/60 system of 50 Mb/s format) 32 Table 10 A frame and servo information (625/50 system of 50 Mb/s format) 33 Table 11 Bit stream of ITI preamble for servo information F 042 Table 12 Bit stream of ITI preamble for servo information F 143 Table 13 Bit stream of ITI prea
37、mble for servo information F 244 Table 14 Bit stream of SSA for servo information F 0. 45 Table 15 Bit stream of SSA for servo information F 1. 46 Table 16 Bit stream of SSA for servo information F 2. 47 Table 17 Application ID of track information 48 Table 18 Pilot frame . 48 Table 19 Bit stream of
38、 TIA for servo information F 049 Table 20 Bit stream of TIA for servo information F 149 62071-1 IEC:2005 5 Table 21 Bit stream of TIA for servo information F 249 Table 22 Bit stream of ITI post-amble for servo information F 0. 50 Table 23 Bit stream of ITI post-amble for servo information F 1. 50 Ta
39、ble 24 Bit stream of ITI post-amble for servo information F 2. 50 Table 25 ID0 in audio sector . 53 Table 26 Audio application ID . 53 Table 27 Track pair number for 25 Mb/s format 53 Table 28 Track pair number for 50 Mb/s format 54 Table 29 Bit assignment of ID codewords . 55 Table 30 ID data in vi
40、deo sector . 59 Table 31 Video application ID . 60 Table 32 ID data in subcode sector 62 Table 33 Subcode application ID 63 Table 34 AAUX data . 67 Table 35 Mapping of AAUX source pack . 67 Table 36 Mapping of AAUX source control pack 68 Table 37 VAUX data . 74 Table 38 Mapping of VAUX source pack .
41、 74 Table 39 Mapping of VAUX source control pack 75 Table 40 Mapping of subcode pack 78 Table 41 Mapping of time code pack 79 Table 42 Mapping of a binary group pack . 80 Table C.1 Nomenclature and calculation of track location error . 87 Table E.1 Tape length and recording time . 90 6 62071-1 IEC:2
42、005 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D-7 Part 1: VTR specifications FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all natio
43、nal electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical
44、 Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. In
45、ternational, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The
46、 formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendatio
47、ns for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end us
48、er. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have
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