oSIST prEN IEC 62702-1-2:2022

SLOVENSKI STANDARD
oSIST prEN IEC 62702-1-2:2022
01-januar-2022
Sistem zvočnega arhiva - 1-2 del: BD disk in migracija podatkov za dolgoročno
shranjevanje zvočnih podatkov
Audio archive system - Part 1-2 : BD disk and data migration for long-term audio data
storage
Ta slovenski standard je istoveten z: prEN IEC 62702-1-2:2021
ICS:
33.160.30 Avdio sistemi Audio systems
35.220.30 Optične shranjevalne Optical storage devices
naprave
oSIST prEN IEC 62702-1-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 62702-1-2:2022

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oSIST prEN IEC 62702-1-2:2022
100/3671/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62702-1-2 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-11-19 2022-02-11
SUPERSEDES DOCUMENTS:
100/3605/CD, 100/3646/CC

IEC TA 6 : STORAGE MEDIA, STORAGE DATA STRUCTURES, STORAGE SYSTEMS AND EQUIPMENT
SECRETARIAT: SECRETARY:
Japan Mr Koji Tsukada
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:


Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

TITLE:
Audio archive system - Part 1-2 : BD disk and data migration for long-term audio data storage

PROPOSED STABILITY DATE: 2027

NOTE FROM TC/SC OFFICERS:


Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

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1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 7
8 4 Disk and lifetime for long-term audio data storage . 9
9 4.1 Disk for long-term audio data storage . 9
10 4.2 Lifetime estimation . 9
11 4.3 B life for long-term audio data storage. 10
mig
12 4.4 Estimated-lifetime rank and display colour . 10
13 4.4.1 Estimated-lifetime rank and display colour identification . 10
14 4.4.2 Bmiglife and display colour indication on disks and packages . 10
15 5 Test condition, test methods and disks for audio data . 11
16 5.1 Ambient conditions of maximum data error measurement . 11
17 5.2 Test methods . 11
18 5.2.1 Playback test drive . 11
19 5.2.2 Test area and sample disk . 11
20 5.2.3 Recording test drive. 11
21 5.2.4 Test drive check . 11
22 6 Test result evaluation . 11
23 6.1 Initial performance test result evaluation . 11
24 6.2 Periodic performance test evaluation . 12
25 6.3 Reporting items . 13
26 6.3.1 Initial performance test result . 13
27 6.3.2 Periodic performance test result . 13
28 6.4 Management of reporting items . 13
29 6.5 Test and migration intervals . 13
30 7 Prevention of deterioration . 14
31 Annex A (informative) Guideline of usage and indication . 15
32 A.1 Usage of lifetime rank . 15
33 A.2 Lifetime rank indication and place . 15
34 A.2.1 Lifetime rank indication . 15
35 A.2.2 Indication example . 15
36 Annex B (informative) Recommendations on handling, storage and cleaning conditions
37 for BD writable disks . 16
38 B.1 Handling . 16
39 B.2 Storage . 16
40 B.3 Cleaning . 17
41 Annex C (informative) Causes of deterioration for BD disks for long-term data storage . 18
42 C.1 Deterioration . 18
43 C.2 Disk structure . 18
44 C.3 Causes of deterioration . 18
45 C.4 Nature of deterioration . 19
46 C.5 Effects of deterioration . 19
47 C.6 Unexpected deterioration . 19

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48 Bibliography . 20
49
50 Figure 1 – Data migration flow for the initial and the periodic performance tests . 13
51 Figure A.1 – Indication example . 15
52
53 Table 1 – Category of initial recording performance . 12
54 Table 2 – Category of recording performance at periodic performance test . 12
55 Table B.1 – Recommended conditions for general storage . 16
56 Table B.2 – Recommended conditions for controlled storage . 16
57
58

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59 INTERNATIONAL ELECTROTECHNICAL COMMISSION
60 ____________
61
62 AUDIO ARCHIVE SYSTEM –
63
64 Part 1-2: BD disk and data migration for long-term audio data storage
65
66 FOREWORD
67 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
68 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
69 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
70 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
71 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
72 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
73 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
74 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
75 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
76 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
77 consensus of opinion on the relevant subjects since each technical committee has representation from all
78 interested IEC National Committees.
79 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
80 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
81 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
82 misinterpretation by any end user.
83 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
84 transparently to the maximum extent possible in their national and regional publications. Any divergence between
85 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
86 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
87 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
88 services carried out by independent certification bodies.
89 6) All users should ensure that they have the latest edition of this publication.
90 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
91 members of its technical committees and IEC National Committees for any personal injury, property damage or
92 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
93 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
94 Publications.
95 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
96 indispensable for the correct application of this publication.
97 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
98 rights. IEC shall not be held responsible for identifying any or all such patent rights.
99 IEC 62702-1-2 has been prepared by technical area 6: Storage media, storage data structures,
100 storage systems and equipment, of IEC technical committee 100: Audio, video and multimedia
101 systems and equipment. It is an International Standard.
102 This 2nd edition cancels and replaces the 1st edition published in 2017-11-07. This edition
103 constitutes a technical revision.
th
104 Reflect the update of the reference standard ISO/IEC 29121 4 edition that has been published,
105 this edition includes the following significant technical changes with respect to the previous
106 edition:
107 a) ISO/IEC 16963 has been identified as the referee test method for the lifetime estimation;
108 a) the ambient conditions for the measurement of maximum data error have been added;
109 b) the requirements for test drives have been changed considering the use condition of users;
110 c) the requirements for the estimated lifetime have been defined more clearly;
111 d) the requirements for the periodic performance test have been defined more clearly.

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IEC CDV 62702-1-2 Ed2 © IEC:2021 – 5 –
112 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
113
114 Full information on the voting for its approval can be found in the report on voting indicated in
115 the above table.
116 The language used for the development of this International Standard is English.
117 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
118 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
119 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
120 described in greater detail at www.iec.ch/standardsdev/publications.
121 The committee has decided that the contents of this document will remain unchanged until the
122 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
123 specific document. At this date, the document will be
124 • reconfirmed,
125 • withdrawn,
126 • replaced by a revised edition, or
127 • amended.
128
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.
129
130

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131 INTRODUCTION
132 Sound recordings such as music, speech, and storytelling are an important human heritage and
133 should be preserved for a long term as much as possible. However, we were not able to record
134 sounds in order to preserve them in the past. The first recoding was achieved by Edison in 1877.
135 Although various technologies were invented later, most of them have limitations for audio
136 archives because storage lifetime is limited and the sound quality deteriorates when it is
137 transferred to the next generation storage device.
138 The progress of LSI (Large-Scale Integrated Circuit) technology made digital recording of
139 recorded sound possible. The digital recording is very suitable for audio archiving because the
140 migration is performed by copying digital data.
141 For this purpose, various recording materials exist, such as optical disks, magnetic disks,
142 magnetic tape and non-volatile memory such as a phase-change memory.
143 This document specifies physical and logical aspects for a standard of audio archives of various
144 storage types which are typically used for audio archives in markets.
145 The IEC 62702 series currently consists of:
146 Part 1 specifies the minimum requirements on physical aspects of optical disks for digital sound
147 recordings. Part 1-1 specifies DVD optical disks, and Part 1-2 specifies BD optical disks.
148 Part 2 specifies the minimum requirements for digitization of content, format of digitized content,
149 content information and media inspection.
150

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151 AUDIO ARCHIVE SYSTEM –
152
153 Part 1-2: BD disk and data migration for long-term audio data storage
154
155
156
157 1 Scope
158 This part of IEC 62702 specifies a method of data-quality assurance for writable disks
159 (hereinafter "disks") which are specified for long-term data storage, and a data migration
160 method which can sustain the recorded data on disks for long-term audio data preservation.
161 The writable disks include BD recordable disk and BD rewritable disk.
162 2 Normative references
163 The following documents are referred to in the text in such a way that some or all of their content
164 constitutes requirements of this document. For dated references, only the edition cited applies.
165 For undated references, the latest edition of the referenced document (including any
166 amendments) applies.
167 ISO/IEC 16963:2017, Information technology – Digitally recorded media for information
168 interchange and storage – Test method for the estimation of lifetime of optical disks for long-
169 term data storage
170 ISO/IEC 29121:2021, Information technology – Digitally recorded media for information
171 interchange and storage – Data migration method for optical disks for long-term data storage
172 3 Terms and definitions
173 For the purposes of this document, the following terms and definitions apply.
174 ISO and IEC maintain terminological databases for use in standardization at the following
175 addresses:
176 • IEC Electropedia: available at http://www.electropedia.org/
177 • ISO Online browsing platform: available at http://www.iso.org/obp
178 3.1
179 B life
mig
180 lifetime (3.10) for use of data migration (3.6) and identical to B life which is 0,000 001
0,000 1
181 quantile of the lifetime distribution (i.e. 0,000 1 % failure time) or 99,999 9 % survival lifetime
182 [SOURCE: ISO/IEC 29121:2021, 3.1]
183 3.2
184 B life
5
185 5 percentile of the lifetime (3.10) distribution (i.e. 5 % failure time) or 95 % survival lifetime
186 [SOURCE: ISO/IEC 16963:2017, 3.4]
187 3.3
188 (B life)
5 L
189 95 % lower confidence bound of B life (3.2)
5
190 [SOUECE: ISO/IEC 16963:2017, 3.5]
191 3.4
192 B life
50
193 50 percentile of the lifetime (3.10) distribution (i.e. 50 % failure time) or 50 % survival lifetime

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194 [SOURCE: ISO/IEC 16963:2017, 3.6]
195 3.5
196 controlled storage condition
197 well-controlled storage conditions with full-time air conditioning (25 °C and 50 % relative
198 humidity) in which the lifetime (3.10) of data stored on optical disks
199 [SOURCE: ISO/IEC 16963:2017, 3.7]
200 3.6
201 data migration
202 process to copy data from one storage device or medium to another
203 [SOURCE: ISO/IEC 29121:2021, 3.5]
204 3.7
205 error correction code
206 ECC
207 mathematical computation yielding check bytes used for the detection and correction of errors
208 in data
209 Note 1 to entry: For BD recordable disk and BD rewritable disk, the long-distance code (LDC) + burst-indicating
210 subcode (BIS) defined in ISO/IEC 30190, ISO/IEC 30191, ISO/IEC 30192, and ISO/IEC 30193 is applied.
211 [SOURCE: ISO/IEC 29121:2021, 3.6 modified— Note 1 to entry is modified.]
212 3.8
213 error rate
214 rate of errors or error count measured on the signal at the input of error-correction decoder,
215 which represents raw-error rate of data recorded on a disk
216 [SOURCE: ISO/IEC 29121:2021, 3.7]
217 3.9
218 initial performance test
219 first test of the error rate (3.8) of data recorded on a disk before storing
220 [SOURCE: ISO/IEC 29121:2021, 3.8]
221 3.10
222 lifetime
223 time that information is retrievable in a system (3.16)
224 [SOURCE: ISO/IEC 29121:2021, 3.9]
225 3.11
226 maximum data error
227 greatest level of error rate (3.8) anywhere in one of the relevant areas on the disk
228 [SOURCE: ISO/IEC 16963:2017, 3.13, modified — Note 1 to entry has been deleted.]
229 3.12
230 RSER
max
231 greatest level of random symbol error rate measured on the signal in one of the relevant areas
232 on a disk at the input of error-correction decoder, which excludes burst errors of length greater
233 than or equal to 40 bytes
234 Note 1 to entry: See ISO/IEC 30190, ISO/IEC 30191, ISO/IEC 30192, ISO/IEC 30193 and ISO/IEC 16963.
235 3.13
236 periodic performance test
237 periodic test of the error rate (3.8) of data recorded on a disk during the storage
238 [SOURCE: ISO/IEC 29121:2021, 3.15]

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239 3.14
240 retrievability
241 ability to recover physical information as recorded
242 [SOURCE: ISO/IEC 16963:2017, 3.14]
243 3.15
244 substrate
245 transparent layer of the disk, provided for mechanical support of the recording or recorded layer,
246 through which the optical beam accesses the recordable/recorded layer
247 [SOURCE: ISO/IEC 16448:2002, 4.18]
248 3.16
249 system
250 combination of hardware, software, storage medium and documentation used to record, retrieve
251 and reproduce information
252 [SOURCE: ISO/IEC 16963:2017, 3.20]
253 3.17
254 uncorrectable error
255 error in the read-out data that cannot be corrected by the error correction decoders
256 [SOURCE: ISO/IEC 29121:2021, 3.18]
257 3.18
258 X interval
mig
259 migration interval (year) which is determined by user
260 [SOURCE: ISO/IEC 29121:2021, 3.19, modified — Note 1 to entry has been deleted.]
261 4 Disk and lifetime for long-term audio data storage
262 4.1 Disk for long-term audio data storage
263 A disk with a specified lifetime should be used for long-term audio data storage. A disk with an
264 unspecified lifetime should not be used.
265 4.2 Lifetime estimation
266 For the purposes of this part, the lifetime of a disk shall be derived from the measurements
267 specified in ISO/IEC 16963. The Eyring method is used for lifetime estimation under controlled
268 storage-conditions (25 °C and 50 % relative humidity).
269 ISO/IEC 16963, the estimated lifetime can be defined variously as B life, B life and the 95 %
50 5
270 lower confidence bound of B life [equals (B life) ] and is described as follows.
5 5 L
� ̂ ̂ ̂

𝐵𝐵 = exp�ln𝐵𝐵 � = exp�𝛽𝛽 +𝛽𝛽𝑥𝑥 +𝛽𝛽𝑥𝑥 �
50 life 50 0 1 10 2 20
� ̂ ̂ ̂

𝐵𝐵 = exp�ln𝐵𝐵� = exp�𝛽𝛽 +𝛽𝛽𝑥𝑥 +𝛽𝛽𝑥𝑥 − 1,64𝜎𝜎��
5 life 5 0 1 10 2 20
271 where
B50 life is the variable for B50life;
B is the variable for B life;
5 life 5
are the temperature-dependent factor and the relative-humidity–dependent factor at the

x and x
10 20
controlled storage conditions (25 °C/50 % relative humidity) respectively.
272 Also, the 95 % lower confidence bound of B life becomes
5

� � �
𝐵𝐵 = exp��ln𝐵𝐵�� = exp�ln𝐵𝐵 − 1,64�var�ln𝐵𝐵��
(5 life)L 5 5 5
L

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273
where
B(5 life)L is the variable for (B5life)L
ˆ ˆˆ
ˆ
274 and estimated variance of residual errors are obtained using regression analysis of
β ,,ββ σ
0 12
275 time-to-failure data.
276 4.3 B life for long-term audio data storage
mig
277 The estimated lifetime of B life means 5 % of the products reach failure. It is widely used in
5
278 other contexts. However, from the viewpoint of the reliability of long-term audio storage to retain
279 the integrity of the original data, it is not appropriate to use B life as the estimated lifetime when
5
280 determining a test interval and deciding on data migration.
281 In the case of audio data migration, it is necessary to have a sufficiently low failure probability.
282 The time at which one millionth of the products reach the failure shall define the estimated
283 lifetime in this part to determine test intervals and migration interval. B life is 0,000 001
0,000 1
284 quantile of the lifetime distribution (i.e. 0,000 1% failure time) and expressed as B life in this
mig
285 part. B life can be calculated using B life and B life as follows (see also ISO/IEC 29121:2021,
mig 50 5
286 Annex E).
� �

ln𝐵𝐵 − ln𝐵𝐵
50 5
� � �
𝐵𝐵 = exp �ln𝐵𝐵 � = exp�ln𝐵𝐵 − 4,75𝜎𝜎�� = exp�ln𝐵𝐵 − 4,75 � =
0,000 1 life 0,000 1 50 50
1,64
� �
exp�2,9 ln𝐵𝐵 − 1,9 ln𝐵𝐵 �
5 50
287 where
𝐵𝐵 is the variable for B0,000 1life.
0,000 1 life
288 Thus
� �
𝐵𝐵 × 24 × 365 =𝐵𝐵 = exp �2,9 ln𝐵𝐵 − 1,9 ln𝐵𝐵 �
mig life 0,000 1 life 5 50
289 where
Bmig life is the variable for Bmiglife in years.
290 In actual storage conditions, the temperature and relative humidity can deviate from the
291 controlled storage condition of 25 °C and 50 % relative humidity, which changes the estimated
292 lifetime. In this case, the estimated lifetime should be adjusted according to the estimated
293 lifetime at the actual storage conditions as specified in ISO/IEC 29121:2021, Annex D.
294 4.4 Estimated-lifetime rank and display colour
295 4.4.1 Estimated-lifetime rank and display colour identification
296 For audio data migration, rank of B life and its identifying display colour are defined as follows.
mig
297 B life is over 30 years, the display colour is red.
mig
298 B life is over 60 years, the display colour is green.
mig
299 B life is over 100 years, the display colour is gold.
mig
300 Guideline for use of the ranks of B life and their display colours are shown in 0.
mig
301 4.4.2 B life and display colour indication on disks and packages
mig
302 The rank of B life, its display colour and the reference-controlled storage condition shall be
mig
303 indicated both on the disk and package, excluding a two-sided disk. Indication examples for
304 ranks and their colours are shown in 0.

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305 5 Test condition, test methods and disks for audio data
306 5.1 Ambient conditions of maximum data error measurement
307 The ambient condition is the surrounding condition in a room where a test drive is located. The
308 ambient conditions for the RSER measurement are as follows:
max
Temperature: 15 °C to 30 °C
Relative humidity: 20 % to 75 %
309 5.2 Test methods
310 5.2.1 Playback test drive
311 For BD-recordable disk and BD rewritable disk, the test drive shall have capability to measure
312 RSER .
max
313 The test drive shall have the capability to evaluate the error rate level specified in the initial
314 performance test and the periodic performance test.
315 NOTE The measuring circuit for random symbol error rate (RSER) described in ISO/IEC 30191 and ISO/IEC 30193
316 is different from that of described in ISO/IEC 30190 and ISO/IEC 30192, especially in HF signal pre-processing
317 circuit. See ISO/IEC 30190:2016, Annex H, and ISO/IEC 30191:2015, Annex H, for additional information.
318 5.2.2 Test area and sample disk
319 The test area is the recorded area to be tested in a disk.
320 The whole recorded area of all disks shall be tested for the initial performance test.
321 The whole recorded area of all disks should be tested for the periodic performance test.
322 Although the integrity of the data becomes lower, the user may reduce the test area and/or the
323 number of sample disks based on a certain sampling method, considering the value of
324 information. For the reduction of test area, see ISO/IEC 16963:2017, 7.5 for additional
325 information. The number of sample disks should be enough value, which can guarantee the
326 statistical effectiveness. If the sample disks have different attributes such as disk standards,
327 recording conditions or storage conditions, the disks should be divided into groups of disks
328 considering the attributes so that the sampling may be applied on each group with the statistical
329 effectiveness.
330 5.2.3 Recording test drive
331 There are two cases of the test drive. One is that the drive serves both as a test drive and a
332 recorder which records the data on the disk. The other is that the test drive is different from the
333 recorder. For both cases the data recorded on the disk by the recorder shall fulfil the error rate
334 level specified in the initial performance test and the periodic performance test.
335 5.2.4 Test drive check
336 The test drive shall be checked by using a reference disk prepared by the test drive
337 manufacturer or the disk prepared by the user, so that it fulfils the requirements in 5.2.1, 5.2.2
338 and 5.2.3. When using the reference disk prepared by the test drive manufacturer,
...