1、 INTERNATIONAL STANDARD IEC 62447-2First edition 2007-06Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-12 Part 2: Compression format Reference number IEC 62447-2:2007(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 2: Compression format XB For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 62447-2 IEC:2007(E) CONT
9、ENTS FOREWORD.5 1 Scope.7 2 Normative references .7 3 Abbreviations and acronyms.8 4 Data processing .8 4.1 General .8 4.1.1 Video encoding parameter.9 4.1.2 Audio encoding parameter.9 4.1.3 Subcode data 9 4.1.4 Frame structure.9 4.2 Data structure .9 4.3 Header section11 4.3.1 ID 11 4.3.2 Data 14 4
10、.4 Subcode section15 4.4.1 ID 15 4.4.2 Data 15 4.5 VAUX section 19 4.5.1 ID 19 4.5.2 Data 19 4.6 Audio section 23 4.6.1 ID 23 4.6.2 Data 23 4.7 Video section 28 4.7.1 ID 28 4.7.2 Data 28 5 Video compression .32 5.1 Video structure32 5.1.1 Video sampling structure .32 5.1.2 DCT block .37 5.1.3 Macro
11、block.38 5.1.4 Super block .49 5.1.5 Definition of super block number, macro block number and value of the pixel 49 5.1.6 Definition of video segment and compressed macro block .53 5.2 DCT processing.54 5.2.1 DCT mode.54 5.2.2 Weighting 55 5.2.3 Output order 56 5.3 Quantization57 5.3.1 Introduction
12、.57 5.3.2 Bit assignment for quantization57 5.3.3 Quantization step 57 5.4 Variable length coding (VLC).58 5.5 Arrangement of a compressed macro block .61 5.6 Arrangement of a video segment.63 62247-2 IEC:2007(E) 3 Annex A (informative) Block diagram of D-12 recorder.67 Annex B (normative) Digital f
13、ilter for sampling-rate conversion 68 Annex C (informative) Relation to IEC 61834-369 Bibliography70 Figure 1 Data processing block diagram 9 Figure 2 Data structure 10 Figure 3 Data structure of a DIF sequence.11 Figure 4 Data in the subcode section .15 Figure 5 Pack in SSYB.16 Figure 6 Data in the
14、 VAUX section.20 Figure 7 Data in the audio section23 Figure 8 Conversion of audio sample to audio data bytes 25 Figure 9 Arrangement of AAUX packs in audio auxiliary data.25 Figure 10 Sampling structure for the 1080/60i system35 Figure 11 Sampling structure for the 1080/50i system36 Figure 12 Sampl
15、ing structure for the 720/60p system.37 Figure 13 DCT block and the pixel coordinates for the 1080-line system41 Figure 14 DCT block and the pixel coordinates for the 720-line system41 Figure 15 DCT block arrangement for the 1080/60i system 41 Figure 16 DCT block arrangement for the 1080/50i system
16、41 Figure 17 DCT block arrangement for the 720/60p system .42 Figure 18 Macro block and DCT blocks for the 1080-line system42 Figure 19 Macro block and DCT blocks for the 720-line system .42 Figure 20 Arrangement of macro blocks for the 1080/60i system43 Figure 21 Arrangement of macro blocks for the
17、 1080/50i system44 Figure 22 Arrangement of macro blocks for the 720/60p system 45 Figure 23 Divided blocks for the 1080/60i system 46 Figure 24 Divided blocks for the 1080/50i system 47 Figure 25 Divided blocks for the 720/60p system .48 Figure 26 Super blocks and macro blocks in a divided block fo
18、r the 1080/60i system.50 Figure 27 Macro block order in a super block for the 1080/60i system50 Figure 28 Super blocks and macro blocks for the 1080/50i system.51 Figure 29 Macro block order in a super block for the 1080/50i system51 Figure 30 Super blocks and macro blocks in a divided block for the
19、 720/60p system52 Figure 31 Macro block order in a super block for the 720/60p system 52 Figure 32 Rearrangement of pixels in the 8-8-field-DCT mode .55 Figure 33 Quantizer matrix for the 1080/60i system .56 Figure 34 Quantizer matrix for the 1080/50i system .56 Figure 35 Quantizer matrix for the 72
20、0/60p system 56 Figure 36 The output order of a weighted DCT block .57 4 62447-2 IEC:2007(E) Figure 37 Arrangement of a compressed macro block61 Figure 38 Arrangement of a video segment after the bit rate reduction.65 Figure 39 Video error code 66 Figure A.1 Block diagram of D-12 recorder 67 Figure
21、B.1 Template for insertion-loss frequency characteristic68 Figure B.2 Pass band ripple tolerance .68 Table 1 ID data of a DIF block .12 Table 2 Section type 12 Table 3 DIF sequence number for the 60 Hz system 13 Table 4 DIF sequence number for the 50 Hz system 13 Table 5 DIF channel number14 Table 6
22、 DIF block number14 Table 7 Data (payload) in the header section.14 Table 8 SSYB ID16 Table 9 Pack header table .17 Table 10 Mapping of packets in SSYB data17 Table 11 Mapping of time code pack18 Table 12 Mapping of binary group pack19 Table 13 Mapping of VAUX pack in a DIF sequence 20 Table 14 Mapp
23、ing of VAUX source pack 20 Table 15 Mapping of VAUX source control pack.21 Table 16 FF/FS for the 1080-line system22 Table 17 FF/FS for the 720-line system .22 Table 18 Mapping of AAUX pack in a DIF sequence 25 Table 19 Mapping of AAUX source pack 26 Table 20 Mapping of AAUX source control pack.27 T
24、able 21 SPEED code definition 28 Table 22 Video DIF blocks and compressed macro blocks for the 60 Hz system 30 Table 23 Video DIF blocks and compressed macro blocks for the 50 Hz system 31 Table 24 Construction of input video34 Table 25 Quantization step 58 Table 26 Length of codewords .59 Table 27
25、Codewords of variable length coding.60 Table 28 Definition of STA .62 Table 29 Codewords of the QNO .63 Table B.1 Parameter of digital filter68 62247-2 IEC:2007(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D
26、-12 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 international co-operation on all questions co
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34、ommittees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Public
35、ations. 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 Publication may be the subject of p
36、atent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62247-2 has been prepared by IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this standard is based on the following documents: CDV Re
37、port on voting 100/1092/CDV 100/1187/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The list of all the parts of the IEC 62247
38、 series, under the general title Helical-scan compressed digital video cassette system using 6,35 mm magnetic tape Format D-12, can be found on the IEC website. 6 62447-2 IEC:2007(E) This part 2 describes the specifications for encoding process and data format for 1080i, 1080p and 720p systems. Part
39、 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 360 Mb/s serial digital interface. The
40、 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; withdrawn; replaced by
41、a revised edition, or amended. A bilingual version of this publication may be issued at a later date. 62247-2 IEC:2007(E) 7 HELICAL-SCAN COMPRESSED DIGITAL VIDEO CASSETTE SYSTEM USING 6,35 mm MAGNETIC TAPE FORMAT D-12 Part 2: Compression format 1 Scope This part of IEC 62247 defines the data structu
42、re for the interface of DV-based digital audio, subcode data, and compressed video at 100 Mb/s. This standard defines the processes required to decode the DV-based data structure into eight channels of AES-3 digital audio at 48 kHz, subcode data, and high-definition video at 1080/60i, 1080/50i, and
43、720/60p. The following high-definition video parameters are used in this standard: 1080/60i system Input video format: 1920 1080 image sampling structure, 59,94 Hz field rate, interlace format. Compressed video data rate: 100 Mb/s 1080/50i system Input video format: 1920 1080 image sampling structur
44、e, 50 Hz field rate, interlace format. Compressed video data rate: 100 Mb/s 720/60p system Input video format: 1280 720 image sampling structure, 59,94 Hz frame rate, progressive format. Compressed video data rate: 100 Mb/s In this standard, the 60 Hz system nomenclature refers to both 1080/60i and
45、720/60p systems; whereas the 50 Hz system refers only to the 1080/50i system. The nomenclature 1080-line system refers to both 1080/60i and 1080/50i systems, while the 720-line system refers only to the 720/60p system. 2 Normative references The following referenced documents are indispensable for t
46、he 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 12M:1999, Television, Audio and Film Time and Control Code SMPTE 274M:1998, Television, 1920 x 1080 S
47、canning and Analog and Parallel Digital Interfaces for Multiple Picture Rates SMPTE 260M:1999, Television, 1125/60 High-Definition Production System Digital Representation and Bit Parallel Interface SMPTE 296M:1997, Television, 1280 x 720 Scanning, Analog and Digital Representation and Analog Interf
48、ace AES3:1992, Serial Transmission Format for Two-Channel Linearly Represented Digital Audio Data 8 62447-2 IEC:2007(E) 3 Abbreviations and acronyms AAUX Audio auxiliary data AP1 Audio application ID AP2 Video application ID AP3 Subcode application ID APT Track application ID Arb Arbitrary AS AAUX source pack ASC AAUX source control pack CGMS Copy generation management system CM Compressed macro block DBN DIF block number DCT Discrete cosine transform DIF Digital interface DRF Direction flag Dseq DIF sequence number DSF DIF sequence flag EFC Emphasis audio channel flag EOB End of block LF L
