Iec 62875 2015

IEC 62875 Edition 1 0 201 5 02 INTERNATIONAL STANDARD Multimedia systems and equipment – Multimedia e publishing and e book technologies – Printing specification of texture map for auditory presentati[.]

IEC 62875

Editio 1.0 2 15-0

Mult imedia syst ems and equipment – Mult imedia e- publ shing and e- book

t echnologies – Print ing specificat ion of t ext ure map for audit ory present at ion of

print ed t ex t s

®

c olour

inside

THIS PUBLICATION IS COPYRIGHT PROTECTED

Copyr ight © 2 15 IEC, Ge e a, Switzer la d

Al rig ts r es r ve Unle s oth rwis s e ifi d, n p rt of this p blc tio ma b r epr od c d or uti z d in a y form

or b a y me n , ele tr onic or me h nic l in lu in p oto o yin a d microfim, with ut p rmis io in wr itin from

eith r IEC or IEC's memb r Natio al Commite in th c u tr y of th re u ste If y u h v a y q e tio s a o t IEC

c p r i ht or h v a e q ir y a o t o tainin a ditio al ri hts to this p blc tio , ple s c nta t th a dr es b low or

y ur lo al IEC memb r Natio al Commite for ur th r informatio

Ab ut t he IEC

Th Intern tio al Ele trote h ic l Commis io (IEC) is th le din glo al org niz tio th t pr ep res a d p bls e

Internatio al Sta d r ds for al ele tri al ele tr onic a d relate te h olo ie

Abo t IEC p blc tio s

Th te h ic l c nte t of IEC p blc tio s is k pt u d r c n ta t r eview b th IEC Ple s ma e s re th t y u h v th

late t e itio ,a c rr ig n a or a ame dme t mig t h v b e p bls e

IEC Cat alo ue - webst ore.e ch/ cat alo ue

Th st an -alo e a plc t io for c n ultin th e tire

biblo ra hic l informat io o IEC Intern tio al Sta d rd ,

Te h ic l Sp cific tio s, Te h ic l R ep rts a d oth r

d c me ts A v aia le for P , Ma OS, A ndroid Ta let s a d

iPa

IEC p blc t i ns s arch - www ie ch/ se rch u

Th a v an e s arc e a le t o fin IEC p blc t io s b a

variety of crit eria (efere c n mb r, t ext, t ec nic l

c mmitt e,…) It als gives informatio o projec t s, re la e

a d wit hdrawn p blc tio s

IEC Just P blshed - webst ore.e ch/ just pu lshed

St ay u to d te o al n w IEC p blc tio s Ju t Pu ls e

d t ais al n w p blc t io s rele s d A v aia le o ln a d

als o c a mo t h b emai

Ele t ro edia - www ele t ro edia.org

Th world's le din o ln dic t io ary of elec t ro ic a d

ele t ric l t erms c ntainin more t ha 3 0 0 terms a d

d finitio s in En ls a d Fre c , wit h e uiv ale t t erms in 15

a ditio al la g a e Als k nown a t he Int ern t io al

Elec t rot ec nic l Vo a ulary (IEV ) o ln

IEC Glos ar y - st d.e ch/ glos ary

More t ha 6 0 0 ele t rot ec nic l termin lo y e t rie in

En ls a d Fre c e tra t ed fom t he Terms a d Definitio s

cla s of IEC p blc t io s is u d sin e 2 0 Some e t rie

h v e b e c le t ed fom e rler p blc tio s of IEC TC 3 ,

7 ,8 a d CISPR

IEC Cust omer Servic Cent re - webst ore.ec ch/ csc

If y ou wis to giv e u your fe d a k o t his p blc tio or

n e furt her a sista c , ple s c nta t t he Cu tomer Serv ic

Ce t re:c c@ie c

IEC 62875

Edit io 1.0 2 15-0

Mult imedia syst ems and equipment – Mult imedia e- publ shing and e- book

t echnologies – Print ing specificat ion of t ext ure map for audit ory present at ion of

print ed t ext s

INT ER NAT IONAL

ELECT R OT ECHNICAL

®

W arnin ! Mak e s re th t you o tain d this publ c t ion from a a thorize dist ribut or

c olour

inside

FOREWORD 3

1 Sco e 5

2 Normative ref eren e 5

3 Terms an def i ition 5

4 Printin sp cif i ation 6

4.1 General 6

4 2 Size of a texture ma

6 4.3 Printin q al ty of a texture ma 6

4.3.1 Printin q al ty 6

4.3.2 Sampl n l ne 7

4.3.3 Qual ty me s re 8

4.4 L cation of a texture ma 1

4.5 L cation of a notc 1

An ex A (informative) Examples of visible q alty of a texture ma 13 An ex B (informative) Cre tin proces of printed mater in lu in a texture ma 15 Fig re 1 – Sampl n l nes in case of size M texture ma 7

Fig re 2 – Reflectan e p tern of cel s on s an in the sampln l nes 8

Fig re 3 – L n th b twe n en p ints of tic mark on a horizontal sampl n lne 9

Fig re 4 – L cation of a texture ma 1

Fig re 5 – L cation of a sin le notc 12 Fig re 6 – L cation of double notc es 12 Fig re A.1 – Texture ma with hig printin q al ty 13 Fig re A.2 – Texture ma in lu in low contrast cels an non-s uare cels 13 Fig re A.3 – Texture ma with low s arpnes 14 Fig re A.4 – Texture ma proces ed by non-preservin data compres ion 14 Fig re B.1 – Cre tin proces of printed mater in lu in a texture ma 15 Ta le 1 – Sizes of a texture ma 6

Ta le 2 – Printin q al ty of a texture ma 7

Ta le 3 – Value of print contrast 8

Ta le 4 – Value of s mmetry of cel p tern 9

Ta le 5 – Value of s uarenes 9

Ta le 6 – Value of size ac urac 10 Ta le 7 – Value of tic mark identification 10 Ta le 8 – Value of q iet zone s f ficien y 10 Ta le 9 – Value of u eles nes of er or cor ection 1

Ta le 10 – Value of decoda i ty 1

INTERNATIONAL ELECTROTECHNICAL COMMISSION

1 Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org niz tio for sta d rdiz tio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q e tio s c n ernin sta d rdiz tio in th ele tric l a d ele tro ic f i ld To

this e d a d in a ditio to oth r a tivitie , IEC p bls e Intern tio al Sta d rd , Te h ic l Sp cific tio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cif i atio s (P S) a d Guid s (h re f ter refer e to a “IEC

Pu lc tio (s)”) Th ir pre aratio is e tru te to te h ic l c mmite s; a y IEC Natio al Commite intere te

in th s bje t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n n

-g v rnme tal org niz tio s laisin with th IEC als p rticip te in this pre aratio IEC c la orate clo ely

with th Intern tio al Org niz tio f or Sta d rdiz tio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org niz tio s

2) Th f ormal d cisio s or a re me ts of IEC o te h ic l maters e pre s, a n arly a p s ible, a intern tio al

c n e s s of o inio o th rele a t s bje ts sin e e c te h ic l c mmite h s re re e tatio fom al

intere te IEC Natio al Commite s

3) IEC Pu lc tio s h v th form of re omme d tio s f or intern tio al u e a d are a c pte b IEC Natio al

Commite s in th t s n e Whie al re s n ble ef forts are ma e to e s re th t th te h ic l c nte t of IEC

Pu lc tio s is a c rate, IEC c n ot b h ld re p n ible for th wa in whic th y are u e or f or a y

misinterpretatio b a y e d u er

4) In ord r to promote intern tio al u if ormity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

tra s are tly to th ma imum e te t p s ible in th ir n tio al a d re io al p blc tio s An div rg n e

b twe n a y IEC Pu lc tio a d th c re p n in n tio al or re io al p blc tio s al b cle rly in ic te in

th later

5) IEC its lf d e n t pro id a y ate tatio of c nf ormity In e e d nt c rtific tio b die pro id c nf ormity

a s s me t s rvic s a d, in s me are s, a c s to IEC mark of c nf ormity IEC is n t re p n ible f or a y

s rvic s c rie o t b in e e d nt c rtific tio b die

6) Al u ers s o lde s re th t th y h v th late t e itio of this p blc tio

7) No la i ty s al ata h to IEC or its dire tors, emplo e s, s rv nts or a e ts in lu in in ivid al e p rts a d

memb rs of its te h ic l c mmite s a d IEC Natio al Commite s f or a y p rs n l injury, pro erty d ma e or

oth r d ma e of a y n ture wh ts e er, wh th r dire t or in ire t, or for c sts (in lu in le al f ee ) a d

e p n e arisin o t of th p blc tio , u e of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

8) Ate tio is drawn to th Normativ refere c s cite in this p blc tio Us of th refere c d p blc tio s is

in is e s ble for th c r e t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t s me of th eleme ts of this IEC Pu lc tio ma b th s bje t of

p te t rig ts IEC s al n t b h ld re p n ible f or id ntif yin a y or al s c p te t rig ts

International Stan ard IEC 6 8 5 has b en pre ared by tec nical are 10: Multimedia

e-publ s in an e-b ok tec nologies, of IEC tec nical commit e 10 : Au io, vide an

multimedia s stems an eq ipment

The text of this stan ard is b sed on the f ol owin doc ments:

Ful inf ormation on the votin for the a proval of this stan ard can b f oun in the re ort on

votin in icated in the a ove ta le

This publ cation has b en draf ted in ac ordan e with the ISO/IEC Directives, Part 2

The commit e has decided that the contents of this publ cation wi remain u c an ed u ti

the sta i ty date indicated on the IEC we site u der "ht p:/we store.iec.c " in the data

related to the sp cific publ cation At this date, the publ cation wi b

• reconfirmed,

• with rawn,

• re laced by a revised edition, or

A bi n ual version of this publcation may b is ued at a later date

IMPORTANT – The 'colour inside' logo on th cov r pa e of this publ c tion indic te

that it contains colours whic are considere to be us f ul for the cor e t

und rsta din of its conte ts Us rs s ould th ref ore print this doc me t using a

colour printer

MULTIMEDIA SYSTEMS AND EQUIPMENT –

The texture ma f or au itory presentation of printed texts is printed on p p r or s own on

display devices This International Stan ard sp cif ies the printin q alty of this texture ma

In order to en ure an intero era i ty of the texture ma sp cified in IEC 6 6 5, a printin

sp cification b sed on the q alty of this International Stan ard s ould b employed

The f ol owin doc ments, in whole or in p rt, are normatively ref eren ed in this doc ment an

are in isp n a le f or its a pl cation For dated ref eren es, only the edition cited a ples For

u dated referen es, the latest edition of the referen ed doc ment (in lu in an

amen ments) a pl es

IEC 6 6 5, Mult imed ia systems a d e uipme t – Mult imed ia e-p bl ishin a d e-b o s

te h ologies – Text ure ma for a ditory prese tation of printed tex ts

3 Terms and def initions

For the purp ses of this doc ment, the f ol owin terms an def i ition a ply

3.1

te ture map

two dimen ional cel p tern whic in lu e al g ment lnes an a data matrix

[SOURCE: IEC 6 66 , 2.1, modif ied – Definition has b en clarif ied

3.2

data matrix

two dimen ional cel p tern generated f rom text data compres ion an er or cor ection

en odin

3.3

c l

minimum s uare dot whic con titutes a data matrix

3.4

al gnme t l ne

b rder l ne whic en loses a texture ma

Note 1 to e try: An alg me t ln c n ists of s ld ln s a d tic mark Th s ld ln s h v a c l s width a d

ma p rtialy b interu te

Note 2 to e try: For a ditio al inf ormatio o alg me t ln s, s e IEC 6 6 5

3.5

tic mark

p sitionin mark whic intersects p rp n ic larly with the sol d l nes an is given at eq al

intervals on the sol d l nes of an al g ment lne

Note 1 to e try: A tic mark in ic te th u it b u d ry a d h s a c l s width

3.6

quiet zon

non-printing are outside of a texture ma

3.7

unit

s uare are whic con ists of 1 × 1 cels in a texture ma

4 Printing spe if ication

Texture ma s generated by a s stem are sp cified by IEC 6 6 5 an a printin q al ty of the

texture ma s has to b stan ardized to en ure intero era i ty of the printed texture ma s

Texture ma s s ould b printed on p p r with a resolution of ≥ 0 dpi (dots p r in h,

≥ 3,6 2 dotmm) In order to minimize sp c lar reflection, a mat co ted p p r or a low

reflection p p r s ould b u ed

4.2 Size of a te ture map

Four sizes of a texture ma are sp cified by IEC 6 6 5 an they have their dimen ion s own

in Ta le 1

Table 1 – Size of a te ture map

mm

XS

M

4.3 Printin qual ty of a te ture map

4.3.1 Printing qual ty

Printin q al ty of a texture ma is defined by the average Q of values of the f ol owin q al ty

me s res an in icated with the s mb l A, B, C, D or F, as s own in Ta le 2

The fol owin asp cts define the printin q alty:

a) print contrast;

b) s mmetry of cel p t ern;

c) s uarenes ;

d) size ac urac ,

e) tic mark identification;

f ) q iet zone s ff i ien y;

g) u eles nes of er or cor ection, an

h) decoda i ty

Table 2 – Printing qual ty of a te ture map

Q (average of the value of q alty

Printin q alty of a texture map

2,6 ≦ Q < 3,4

B

1,0 ≦ Q < 1,8

D

The values of q alty me s res a) throu h d) are defined by s an in cel s on 10 sampln

l nes (5 horizontal an 5 vertical l nes) A sampl n l ne con ects the cor esp n in tic mark

on the o p site al g ment l nes, as s own in Fig re 1 F r the size XS texture ma , every tic

mark is con ected by a sampl n l ne For size S, M an L texture ma s, every other tic mark

is con ected by a sampl n l ne

The values of q alty me s res a) throu h d) are defined by s an in cel s on 10 sampln

l nes (5 horizontal an 5 vertical l nes) A sampln l ne con ects the cor esp n in tic mark

on the o p site al g ment l nes as s own in Fig re 1 For size XS texture ma , every tic

mark is con ected by a sampl n l ne For size S, M an L texture ma s, every other tic mark

is con ected by a sampl n l ne

Fig re 1 – Sampl n l n s in c s of size M te ture map

Width of q iet zo e

IE C

4.3.3 Qual ty me s re

Eac q al ty me s re is defined as fol ows:

a) print contra t

F r the ref lectan e p tern of white an blac cel s on s an in the sampl n l nes, u in

RL

min

minimum value of ref lectan e of white cel s,

RL

a e average value of eflectan e of white cel s, an

RD

ma

maximum value of ef lectan e of blac cel s,

RC is defined as

RC = (RL

min – RD

ma ) / RL

a e

The value of the print contrast is determined in ac ordan e with the ran e of RC , as s own

in Ta le 3

Table 3 – Value of print contra t

0,8 ≦RC < 0,8

2

RC < 0,7

0

b) s mmetry of c l pat ern

F r the reflectan e p tern of white an blac cel s on s an in the sampl n l nes, u in

RL

a e average value of eflectan e of white cel s, an

RD

a e average value of eflectan e of blac cels,

the thres old RT (se Figure 2) is defined as

RT = (RL

a e + RD

a e

Usin the maximum value WL

ma

an minimum values WL

min

of

WL width of the reflectan e p tern of 4 con ected white cel s (interval b twe n the

le din an trai n p ints cros in RT),

an the maximum value WD

ma

an minimum values WD

min

of

WD width of the reflectan e p tern of 4 con ected blac cel s (interval b twe n the

le din an trai n p ints cros in the RT),

Figure 2 – Ref le ta c pat ern of c l s on s a ning the s mpl ng l ne

IEC

RL

a e

RT

RD

a e

Sc n in th

sampln ln s

WS is def i ed as

WS = |WD

ma – WL

min

| / WD

ma (or |WD

min – WL

ma

| / WL

ma

The value of the s mmetry of cel p t ern is determined in ac ordan e with the ran e WS

as s own in Ta le 4

Table 4 – Value of s mmetry of c l pat ern

Usin the average NX

a e

of

NX n mb r of cel s b twe n en p ints of tic mark on horizontal sampl n l nes

(se Fig re 3),

an the average NY

a e

of

NY n mb r of cel s b twe n en p ints of tic mark on vertical sampln l nes,

Figure 3 – Le gth betwe n e d points of tic mark on a horizontal s mpl ng l ne

NQ is defined as

NQ = |NX

a e – NY

a e

| / (NX

a e + NY

a e

The value of s uarenes is determined in ac ordan e with the ran e of NQ as s own in

Ta le 5

Table 5 – Value of s uare e s

d) size a c ra y

Usin

(NX

a e + NY

a e ) / 2 average n mb r of cel s b twe n en p ints of tic mark on a

sampl n l ne, an

IE C

L n th b twe n e d p ints of ic marks