1、 IEC 62071-2 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 2: Compression format Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une bande magntique
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16、ous: csciec.ch. IEC 62071-2 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 2: Compression format Systme de magntoscope numrique cassette balayage hlicodal signal compress utilisant une
17、bande magntique de 6,35 mm Format D-7 Partie 2: Format de compression INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XB ICS 33.160.40 PRICE CODE CODE PRIX ISBN 978-2-8322-0780-2 Registered trademark of the International Electrotechnical Commission Marque dpose d
18、e la Commission 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 62071-2 IEC:2005 CONTENTS FOREWORD . 5 1 Scope . 7 2 Normative refe
19、rences 7 3 Abbreviations and acronyms . 7 4 Interface . 8 4.1 Introduction . 8 4.2 Data structure 9 4.3 Header section 12 4.4 Subcode section 15 4.5 VAUX section 20 4.6 Audio section . 24 4.7 Video section . 30 5 Video compression . 32 5.1 Video structure 32 5.2 DCT processing . 48 5.3 Quantization
20、51 5.4 Variable length coding (VLC) . 53 5.5 The arrangement of a compressed macro block . 56 5.6 The arrangement of a video segment . 59 Annex A (informative) Differences between IEC 61834 and IEC 62071-2 64 Annex B (normative) Digital filter for sampling-rate conversion from 4:2:2 to 4:1:1 colour
21、difference signals . 65 Annex C (informative) Block diagram of D-7 recorder . 66 Bibliography 67 Figure 1 Block diagram on the digital interface 8 Figure 2 Data structure of one video frame for 50 Mb/s structure 10 Figure 3 Data structure of one video frame for 25 Mb/s structure 10 Figure 4 Data str
22、ucture of a DIF sequence 11 Figure 5 Data in the subcode section 16 Figure 6 Pack in SSYB . 17 Figure 7 Data in the VAUX section 21 Figure 8 Data in the audio section 24 Figure 9 conversion of audio sample to audio data bytes 26 Figure 10 Arrangement of AAUX packs in audio auxiliary data 26 Figure 1
23、1 Transmitting samples of 525/60 system for 4:2:2 compression 34 Figure 12 Transmitting samples of 625/50 system for 4:2:2 compression 35 Figure 13 Transmitting samples of 525/60 system for 4:1:1 compression 36 Figure 14 Transmitting samples of 625/50 system for 4:1:1 compression 37 Figure 15 DCT bl
24、ock and the pixel coordinates . 38 62071-2 IEC:2005 3 Figure 16 The rightmost DCT block in colour difference signal for 4:1:1 compression mode 38 Figure 17 DCT block arrangement for 4:2:2 compression 39 Figure 18 DCT block arrangement for 4:1:1 compression 40 Figure 19 Macro block and DCT blocks for
25、 4:2:2 compression 40 Figure 20 Macro block and DCT blocks for 4:1:1 compression 40 Figure 21 Super blocks and macro blocks in one TV frame for 525/60 system for 4:2:2 compression . 42 Figure 22 Super blocks and macro blocks in one TV frame for 525/60 system for 4:1:1 compression . 43 Figure 23 Supe
26、r blocks and macro blocks in one TV frame for 625/50 system for 4:2:2 compression . 44 Figure 24 Super blocks and macro blocks in one TV frame for 625/50 system for 4:1:1 compression . 45 Figure 25 Macro block order in a super block for 4:2:2 compression . 47 Figure 26 Macro block order in a super b
27、lock for 4:1:1 compression . 47 Figure 27 The output order of a weighted DCT block 50 Figure 28 Area numbers . 52 Figure 29 Arrangement of a compressed macro block for 4:2:2 compression 56 Figure 30 The arrangement of a compressed macro block for 4:1:1 compression 57 Figure 31 The arrangement of a v
28、ideo segment after the bit rate reduction for 4:2:2 compression . 62 Figure 32 The arrangement of a video segment after the bit rate reduction for 4:1:1 compression . 63 Figure 33 The video error code . 63 Figure B.1 Template for insertion loss frequency characteristics . 65 Figure B.2 Passband ripp
29、le tolerance . 65 Figure C.1 Block diagram of D-7 recorder . 66 Table 1 ID data of a DIF block 12 Table 2 Section type . 13 Table 3 DIF sequence number (525/60 system) 13 Table 4 DIF sequence number (625/50 system) 14 Table 5 DIF block number 14 Table 6 Data (payload) in the Header DIF block 15 Tabl
30、e 7 SSYB ID 17 Table 8 Pack header table 18 Table 9 Mapping of packet in SSYB data 18 Table 10 Mapping of time code pack 19 Table 11 Mapping of binary group pack 20 Table 12 Mapping of VAUX pack in a DIF sequence . 21 Table 13 Mapping of VAUX source pack . 21 Table 14 Mapping of VAUX source control
31、pack 23 Table 15 Maping of AAUX pack in a DIF sequence . 26 Table 16 Mapping of AAUX Source pack 27 4 62071-2 IEC:2005 Table 17 Mapping of AAUX Source Control pack 28 Table 18 Video DIF blocks and compressed macro blocks for 50 Mb/s structure 4:2:2 compression . 31 Table 19 Video DIF blocks and comp
32、ressed macro block for 25 Mb/s structure 4:1:1 compression . 32 Table 20 Construction of video signal sampling (4:2:2) . 33 Table 21 Class number and the DCT block . 51 Table 22 An example of the Classification for reference 51 Table 23 Quantization step . 53 Table 24 Length of codewords 54 Table 25
33、 Codewords for variable length coding . 55 Table 26 Definition of STA 57 Table 27 Codewords of the QNO 58 Table A.1 Abstract of differences between IEC 61834 and IEC xxxxx(Part 2) 64 62071-2 IEC:2005 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM
34、USING 6,35 mm MAGNETIC TAPE FORMAT D-7 Part 2: Compression format FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote internation
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41、al 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 the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual exp
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43、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 application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC
44、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 62071-2 has been prepared by technical area 6: Higher data rate storage media, data structures and equipment of IEC technical committee 100: Au
45、dio, video and multimedia systems and equipment. This bilingual version (2013-07) corresponds to the monolingual English version, published in 2005-10. The text of this standard is based on the following documents: CDV Report on voting 100/901/CDV 100/985/RVC Full information on the voting for the a
46、pproval of this standard can be found in the report on voting indicated in the above table. 6 62071-2 IEC:2005 The French version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 62071 consists of the following parts,
47、under the general title Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-7: Part 1: VTR specifications Part 2: Compression format Part 3: Data stream format This part 2 describes the specifications for encoding process and data format for 525i and 625i syste
48、ms. Part 1 describes the VTR specifications which are tape, magnetization, helical recording, modulation method and basic system data for video compressed data. Part 3 describes the specifications for transmission of DV-based compressed video and audio data stream over 270Mb/s and 360 Mb/s serial digital interface. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed; w
