1、BRITISH STANDARD BS EN 62330-2:2004 Helical-scan digital video cassette recording system using 12,65 mm (0,5 in) magnetic tape Format HD-D5 Part 2: Compression format The European Standard EN 62330-2:2004 has the status of a British Standard ICS 33.160.40; 35.240.99 BS EN 62330-2:2004 This British S
2、tandard was published under the authority of the Standards Policy and Strategy Committee on 11 May 2004 BSI 11 May 2004 ISBN 0 580 43758 2 National foreword This British Standard is the official English language version of EN 62330-2:2004. It is identical with IEC 62330-2:2003. The UK participation
3、in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement internation
4、al or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to
5、 include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any
6、enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 45 and a b
7、ack cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 62330-2 NORME EUROPENNE EUROPISCHE NORM March 2004 CENELEC European Committee for Electrotechnical Standardizatio
8、n Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62330-2:2004 E ICS
9、33.160.40; 35.240.99 English version Helical-scan digital video cassette recording system using 12,65 mm (0,5 in) magnetic tape - Format HD-D5 Part 2: Compression format (IEC 62330-2:2003) Systme de magntoscope numrique cassette balayage hlicodal sur bande magntique de 12,65 mm (0,5 in) - Format HD-
10、D5 Partie 2: Format de compression (CEI 62330-2:2003) Videokassettensystem mit Schrgspuraufzeichnung auf Magnetband 12,65 mm (0,5 in) - HD-D5-Format Teil 2: Kompressionsformat (IEC 62330-2:2003) This European Standard was approved by CENELEC on 2004-03-01. CENELEC members are bound to comply with th
11、e 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 application to the Central Secretariat o
12、r to any CENELEC member. This European Standard exists in three official versions (English, French, 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 the same status as the offic
13、ial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Sloveni
14、a, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of the International Standard IEC 62330-2:2003, prepared by Technical Area 6: Higher data rate storage media and equipment, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the formal vote and was a
15、pproved by CENELEC as EN 62330-2 on 2004-03-01 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) 2005-03-01 latest date by which the national standards
16、 conflicting with the EN have to be withdrawn (dow) 2007-03-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62330-2:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN623302:2004 CONTENTS 1 Scope.5 2 Normativ
17、e references5 3 Acronyms.5 4 Video processing 7 4.1 Overview.7 4.2 Video signal.8 4.3 Block formation .10 4.4 SMBG distribution15 4.5 DCT18 4.6 Categorization and weighting .19 4.7 CG shuffling23 4.8 RMB shuffling26 4.9 Quantization 28 4.10 Rate control.28 4.11 VLC.28 4.12 Packing.32 Annex A (normat
18、ive) Overlapped block DCT coding for robustness.43 Annex ZA (normative) Normative references to international publications with their corresponding European publications45 Figure 1 Block diagram of outline about video processing .8 Figure 2 Transmitting samples of 1 080i system .9 Figure 3 Transmitt
19、ing samples of 720p system .10 Figure 4 Overlapped blocking of luminance (Y) pixels .11 Figure 5 Overlapped blocking of colour difference C B /C Rpixels12 Figure 6 Macro block structure in 1 080i system and 720p systems.12 Figure 7 Super macro block structure in 1 080i system and 720p systems.13 Fig
20、ure 8 Pixel arrangement for blocking of 1 080i system14 Figure 9 The arrangement of SMBs in one field for 1 080i system .15 Figure 10 The arrangement of SMBs in one frame for 720p system.15 Figure 11 SMBG distribution in 1 080i system.16 Figure 12 SMBG distribution in 720p system.17 Figure 13 The st
21、ructure of DCT coefficient block 19 Figure 14 CG shuffling for Y .24 Figure 15 CG shuffling for C.25 Figure 16 RMB shuffling.27 Figure 17 The order of VLC coding.29 Figure 18 Structure of C3RMB33 Figure 19 Rearrangement of VLC data codewords 35 Figure 20 Data structure of one 1 080i field/720p frame
22、36 Figure 21 Main data DIF block packing.41 Page3 EN623302:2004 Figure 22 Packing the compressed data in 5 760 DIF Blocks 42 Figure A.1 The process of missing coefficient reproduction.43 Table 1 The construction of video signal sampling 8 Table 2 Categorization of Y signal 20 Table 3 Categorization
23、of C Bsignal 20 Table 4 Categorization of C Rsignal 20 Table 5 Table CY0(t, u) 20 Table 6 Table CY1(t, u) 21 Table 7 Table CY2(t, u) 21 Table 8 Table CY3(t, u) 21 Table 9 Table CC0(t, u)22 Table 10 Table CC1(t, u)22 Table 11 Table CC2(t, u)22 Table 12 Codewords for variable length coding (1)29 Table
24、 13 Codewords for variable length coding (2)30 Page4 EN623302:2004 HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 12,65 mm (0,5 in) MAGNETIC TAPE FORMAT HD-D5 Part 2 Compression format 1 Scope This part of IEC 62330 defines the encoding process of the HD-D5 video compression and its data
25、 format for the 1 080/59,94i system (hereinafter referred to as the 1 080i system) and the 720/59,94p system (hereinafter referred to as the 720p system). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the
26、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ITU-R BT.1543, 1 280 720, 16 9 progressively-captured image format for production and international programme exchange in the 60 Hz ITU-R BT.709, Parameter values for the
27、HDTV standards for production and international programme exchange 3 Acronyms BUF Buffer memory C Colour difference signal C3RMB Compressed data of 3 RMBs C(t, u) The value of the DCT coefficient at frequency (t, u) C B /C RColour difference signal CC0 CC2 Categories for C DCT block Ccoef( ) C DCT C
28、G CG Coefficient group CGNR CG number of one Y/C DCT coefficient block in one RMB CGNS CG number of one Y/C DCT coefficient block in one SMB CN C3RMB number in one RMBG CRcoef( ) Rearranged C DCT CG CS C DCT block number in one SMB CY0 CY3 Categories for Y DCT block DCT Discrete cosine transform DIF
29、 Digital interface DIF(n) DIF block numbered n DN DIF block number EOB “End of block” code EOM “End of 3 RMBs” code Page5 EN623302:2004 exnor Logical exclusive nor f( ) Offset value table for SMBG distribution FCB Category flag of C BDCT block FCB Category flag of C BDCT block FCR Category flag of C
30、 RDCT block FCR Category flag of C RDCT block FFL Field number flag FMB Category flag of the MB FMB Category flag of the MB FYa FYd Category flags of the four DCT blocks (Ya Yd) of the MB FYa FYd Category flags of the four DCT blocks (Ya Yd) of the MB H The horizontal SMB position number in one vide
31、o field (1 080i system) or one video frame (720p system) HR The column position number of RMB HS The column position number of SMB in one SMBG IDCT Inverse discrete cosine transform int (A) Integer part of A LEN The byte length of C3RMB MB Macro block mod Modulus operator N.A. Not applicable Offset(
32、 ) Offset value for RMB shuffling P(r, s) The value of the pixel at the position (r, s) in Y/C DCT block Qno Quantization number Qstep Quantization step value r The horizontal pixel position number in Y/C DCT block Rg The RMBG number within the RMBs RMB Rearranged macro block RMBG Rearranged macro b
33、lock group Rn The number of RMB coding order in each RMBG s The vertical pixel position number in Y/C DCT block SA The starting address of the remainder data in buffer memory SABM One byte data of SA (two bytes) Sg The SMBG number in one video field (1 080i system) or one video frame (720p system) S
34、MB Super macro block SMBG Super macro block group t The horizontal frequency number in Y/C DCT coefficient block TableCY0 3 Set up value tables for Y weighting function TableCC0 2 Set up value tables for C weighting function u The vertical frequency number in Y/C DCT coefficient block V The vertical
35、 position number of SMB in one video field (1 080i system) or one video frame (720p system) VLC Variable length coding Page6 EN623302:2004 VR The row position number of RMB VS The row position number of SMB in one SMBG W(t, u) Weighting value at frequency (t, u) Y Luminance signal Ya Yd Four Y DCT b
36、locks in one MB Ycoef( ) Y DCT CG YR The Y DCT coefficient block number in one RMB YRcoef( ) Rearranged Y DCT CG YS The Y DCT block number in one SMB Z The row position number of the RMB after RMB shuffling ZRL Code of 15 successive zero coefficients followed by a coefficient of zero amplitude 4 Vid
37、eo processing 4.1 Overview Luminance (Y) and colour difference components (C Band C R ) from 1 080i or 720p video signal are sampled by 74,25/1,001 MHz and 37,125/1,001 MHz respectively. After discarding samples in vertical and horizontal blanking periods, active video samples are divided into four
38、super macro block groups (SMBG) per field (1 080i) or per frame (720p). Each SMBG consists of 1 080 super macro blocks (SMB). Each SMB consists of two MBs. Each MB consists of four luminance DCT blocks (8 4 pixel matrix) and one each of C BDCT block (8 8 pixel matrix) and C RDCT block (8 8 pixel mat
39、rix). As described later, two horizontally adjacent luminance DCT blocks are overlapped by one pixel column at their junction. Two horizontally adjacent chrominance DCT blocks are overlapped by one pixel column at their junction when they are formed into SMB. Each DCT block is transformed to represe
40、nt DC and AC coefficients. Coefficients are weighted through the prearranged categories prior to shuffling, then formed into rearranged MBs (RMB). DCT coefficients within one rearranged MB group (RMBG) are quantized, and made into a fixed length data set through VLC. The VLC output code words from o
41、ne RMBG are formed into 360 DIF blocks. The compressed video data for one 1 080i field or one 720p frame consists of 5 760 DIF blocks. The block diagram of the outline about video processing is shown in Figure 1. Page7 EN623302:2004 1 080i 720p Blocking SMBG distribution DCT Categorization Weighting
42、 CG shuffling Quantization Rate control VLC Packing DIF blocks RMB shuffling Base band Video SignalFigure 1 Block diagram of outline about video processing 4.2 Video signal 4.2.1 Sampling process The sampling structure is defined in ITU-R BT.709 and ITU-R BT.1543. Sampling structures of the luminanc
43、e (Y) and the two colour difference signals (C B /C R ) are described in Table 1. 4.2.1.1 Line structure in one field (1 080i system) or frame (720p system) For the 1 080i system, 540 lines for Y, C Band C Rsignals from each field shall be transmitted. For the 720p system, 720 lines for Y, C Rand C
44、Bsignals from each frame shall be transmitted. The transmitting lines on a television frame are defined in Table 1. Table 1 The construction of video signal sampling 1 080i system 720p system Y 74,25 MHz / 1,001 Sampling frequency C B /C R37,125 MHz / 1,001 Y 2 200 1 650 Total number of pixels per l
45、ine C B /C R1 100 825 Y 1 920 1 280 The number of active pixels per line C B /C R960 640 Total number of lines per frame 1 125 750 The number of active lines per frame 1 080 720 Field 1 21 to 560 The active line numbers Field 2 584 to 1 123 Frame 26 to 745 Quantization Each sample is linearly quanti
46、zed to 10 bits for Y, C Band C RScale 4 to 1 019 Y Quantized level: Video signal level of white: Video signal level of black: 877 940 64 The relation between video signal level and quantized level C B /C RQuantized level: Video signal level of gray: 897 512 Page8 EN623302:2004 4.2.1.2 Pixel structur
47、e in one field (1 080i) / in one frame (720p) 1 080i system All sampled pixels, 1 920 luminance pixels per line and 960 colour difference pixels, are retained for processing as shown in Figure 2. The sampling process starts simultaneously for both luminance and colour difference signals. 720p system
48、 All sampled pixels, 1 280 pixels per line and 640 colour difference pixels, are retained for processing as shown in Figure 3. Sampling processes start simultaneously for both luminance and colour difference signals. 1,001 / 74,25MHz First active line in field 1 line 21 line 584 line 22 line 585 line 23 line 586 First pixel in active period First active line in field 2 : : : 0 1 2 3 4 5 6 7 8 - - - - - Y pixel numbers in active area 0 1 2 3 4 - - - - - C B /C Rpixel numbers in active area the active line numbers : Transmitting luminance (Y) pixels : Transmitting colour difference (C B /C R )
