3d sound reproducing method and apparatus

speakers.

2017200552 27 Jan 2017

Description

Title of Invention: 3D SOUND REPRODUCING METHOD AND APPARATUS

[1] The present application is a divisional application from Australian Patent Application No. 2015207829 (which is a divisional application of Australian Patent Application No 2011274709), the entire disclosure of which is incorporated herein by reference.

Technical Field

[la] Methods and apparatuses consistent with exemplary embodiments relate to re-producing three-dimensional (3D) sound, and more particularly, to localizing a virtual sound source to a predetermined elevation.

Background Art

[2] With developments in video and sound processing technologies, contents having high image and sound quality are being provided. Users demanding contents having high image and sound quality now require realistic images and sound, and accordingly, research into 3D image and sound is being actively conducted.

[3] 3D sound is generated by providing a plurality of speakers at different positions on a level surface and outputting sound signals that are equal to or different from each other according to the speakers so that a user may experience a spatial effect. However, sound may actually be generated from various elevations, as well as various points on the level surface. Therefore, a technology for effectively reproducing sound signals that are generated at different levels from each other is necessary.

[3a] A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims.

Disclosure of Invention

Solution to Problem

[4] The present invention provides a 3D sound reproducing method and apparatus thereof for localizing a virtual sound source to a predetermined elevation.

Advantageous Effects of Invention

[5] According to the present embodiment, it is possible to provide 3D three-dimensional effect. And, according to the present embodiment, it is possible that the virtual sound source may be effectively localized to a predetermined elevation.

Brief Description of Drawings

2017200552 27 Jan 2017

[6] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

[7] FIG. 1 is a block diagram of a 3D sound reproducing apparatus according to an exemplary embodiment;

[8] FIG. 2A is a block diagram of the 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by using 5-channel signals;

[9] FIG. 2B is a block diagram of a 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by using a sound signal according to another exemplary embodiment;

[10] FIG. 3 is a block diagram of a 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by using a 5-channel signal according to another exemplary embodiment;

[11] FIG. 4 is a diagram showing an example of a 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by outputting 7-channel signals through 7 speakers according to an exemplary embodiment;

[12] FIG. 5 is a diagram showing an example of a 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by outputting 5-channel signals through 7 speakers according to an exemplary embodiment;

[13] FIG. 6 is a diagram showing an example of a 3D sound reproducing apparatus for localizing a virtual sound source to a predetermined elevation by outputting 7-channel signals through 5 speakers according to an exemplary embodiment;

[14] FIG. 7 is a diagram of a speaker system for localizing a virtual sound source to a predetermined elevation according to an exemplary embodiment; and

[15] FIG. 8 is a flowchart illustrating a 3D sound reproducing method according to an exemplary embodiment.

Best Mode for Carrying out the Invention

[16] Exemplary embodiments provide a method and apparatus for reproducing 3D sound, and in particular, a method and apparatus for localizing a virtual sound source to a predetermined elevation.

[17] According to a first aspect the present invention provides a method of rendering an audio signal, the method comprising: receiving multichannel audio signals and an input configuration; obtaining a first Head-Related Transfer Function (HRTF) based filter for a first height input channel signal among the multichannel audio signals, wherein the first height input channel signal is identified according to the input configuration; obtaining

2017200552 27 Jan 2017 first gains for the first height input channel signal; and performing elevation rendering on the multichannel signals including the first height input channel signal based on the first HRTF based filter and the first gains for elevating sound by a plurality of output channel signals comprising a horizontal configuration, wherein the input configuration comprises azimuth information and elevation information related to the multichannel audio signals.

[18] The predetermined filter may include head related transfer filter (HRTF).

[19] The transmitting the sound signals through the HRTF may include transmitting at least one of a left top channel signal representing a sound signal generated from a left side of a second elevation and a right top channel signal representing a sound signal generated from a right side of the second elevation through the HRTF.

[20] The method may further include generating the left top channel signal and the right top channel signal by np-mixing the sound signal, when the sound signal does not include the left top channel signal and the right top channel signal.

[21] The transmitting the sound signal through the HRTF a include transmitting at least one of a front left channel sign representing a sound signal generated from a front left side and a front right channel signal representing a sound signal generated from a front right side through the HRTF, when the sound signal does not include a left top channel signal representing a sound signal generated from a left side of a second elvation and a right top channel signal representing sound signal generated from a right side of the second elevation.

[22] The HRTF may be generated by dividing a first HRTF including information about a path from the first elevation to ears of a user by a second HRTF include information about a path from a location of a speaker, through which the sound signal will be output, to the ears of the user.

[23] The outputting the sound signal may include: generating a fist sound signal by mixing the sound signal that is obtained by amplifying the filtered left top channel signal according to a first gain value with the sound signal that is obtained by amplifying the filtered right top channel signal according a second gain value; generating a second sound according the sound signal that is obtained by amplifying the left top channel signal according to the second gain value with the sound signal that is obtained by amplifying the filtered right top channel signal according to the first gain value; and outputting the first sound signal through a speaker disposed on a left side and outputting the second sound signal though a speaker disposed on a right side.

[24] The outputting the sound signals may include: generating a third sound signal by mixing a sound signal that is obtained by amplifying a rear left signal representing a sound signal

2017200552 27 Jan 2017 generated from a rear left side a cording to a third gain value with the first sound signal; generating a fourth sound signal by mixing a sound signal that is obtained by amplifying a rear right signal representing a sound signal generated from a rear right side according to the third gain value with the second sound signal; and outputting the third sound signal through a left rear speaker and the fourth sound signal through a right rear speaker.

[25] The outputting the sound signals may further include muting at least one of the first sound signal and the second sound signal according to a location in the first elevation, where the virtual sound source is to be localized.

[26] The transmitting the sound signal though the HRTF may include: obtaining information about the location where the virtual sound source is to be localized; and determining the HRTF though which the sound signal is transmitted, based on the location information.

[27] The performing at least one of the amplifying, attenuating, and delaying processes may include determining at least one of the gain values and the delay values that will be applied to each of the replicated sound signals based on at least one of a location of the actual speaker, a location of a listener, and a location of the virtual sound source.

[28] The determining at least one of the gain value and the delay value may include determining at least one of the gain value and the delay value with respect to each of the replicated sound signals as a determined value, when information about the location of the listener is not obtained.

[29] The determining at least one of the gain value and the delay value may include determining at least one of the gain value and the delay value with respect to each of the replicated sound signals as an equal value, when information about the location of the listener is not obtained.

[30] According to a second aspect, the present invention provides a rendering an audio signal apparatus comprising: a receiver configured to receive multichannel audio signals and an input configuration; a controller configured to obtain a first Head-Related Transfer Function (HRTF) based filter for a first height input channel signal among the multichannel audio signals, wherein the first height input channel signal is identified according to the input configuration and configured to obtain first gains for the first height input channel signal; and a Tenderer configured to perform elevation rendering on the multichannel signals including the first height input channel signal based on the first HRTF based filter and the first gains for elevating sound by a plurality of output channel signals comprising a horizontal configuration, wherein the input configuration comprises azimuth information and elevation information related to the multichannel audio signals.

[31] The predetermined filter is head related transfer filter (HRTF).

4a

2017200552 27 Jan 2017

[32] The filter unit may transmit at least one of a left top channel signal representing a sound signal generated from a left side of a second elevation and a right top channel signal representing a sound signal generated from a right side of the second elevation through the HRTF.

[33] The 3D sound reproducing apparatus may further comprising: an up-mixing unit which generates a left top channel signal and a right top channel signal, when the sound signal does not include the left top channel signal and the right top channel signal.

[34] The filter unit may transmit at least one of a front left channel signal representing a sound signal generated from a front left side and a front right channel signal rep-resenting a sound signal generated from a front right side through the HRTF, when the sound signal does not include a left top channel signal representing the sound signal generated from a left side of a second elevation and a right top channel signal rep-resenting the sound signal generated from a right side of the second elevation.

[35] The HRTF is generated by dividing a first HRTF including information about a path

2017200552 27 Jan 2017

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2017200552 27 Jan 2017

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2017200552 27 Jan 2017

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[78] fhc nafoermg tmd ifoderx the mixed os an -anxed sumttd sxx'tpoixnts ord outputs them fo ssaasaipesifoiH^aapeafcofc.

[79| Tf'it sx'ikk'i'ag isx> tsrq x s tht* ti'sf->ous t xi'p>» os sp he Ait fop .4.,-/¹ .,i^; it ssfopt ‘ iU >i_xssiii. xtdk -.<>< I o x *ΐ fo Ik u Si apth χ χ > U ‘op i»pe;fkes es no fight fop ageakei. the tctsJess-sa unit ;u,s\ ofopfo the ffos sssusui Ki. |V foito li< * s9l»t s\ xk X d <fo V. a U V U S < ill !

irwtmht spasuisai.

[80] in adtfofom foe rendering ana sxap-as the fond sound οοηψοη.-η· t«&lt; foe nx;·’ !oft spesktfo and owgsv foe tonrth xsvnpd e-‘»:ips-ns'ni ax the stv usdtf speaker.

[81] Upt'k o''· o' I ' se > <. foe tin Ά ' oAfo p 'as’. _x j,t J fo i n s

'. >y tfovndmg on t fo umdx'r ot e^fon.'' · j. nd' ^!\ H-Λ t »s fre vni'.J ' tg ,¾ _y._; g p e atunNn thirpe4-^-6 Γ'^ηηρΙ^χ <n ege-a'toi·? <>( dx 3D sound legn’duesea appauitns wskfodnfotot’K tn x\!c dan e m_w> xaxt'B’ev ' ' e s.x k\. _4>u'U¹' 'cfoR-nce fo i ΚΆ, 4 th't'Ugh h.

[87] I tG. 21 is A'foifo dUgra-a of j ΛΡ so d <p ' v is .a. xH iocfoi.fi;) s: a cis'ia,fi'sansifi'Ksnns-ρκχ1''η'ηη»)θ4 x s' i>' k' ''_k ' 2’ ' liOohng fo

[83] \nap'ik m 2'Una cows5 dtaj-vel - s tlx 2 '1 fope > .sis. ~ s set 'x hk'fodiuy a ielt top x'haauet xigtttd ~v2 stud t sight υψ cbsmuel xb<ol 2o.x

[84] f γ s' >>r fo s _ ).J 2(L , 3 ' x ς. x I i .. 'c’ s ' ή <\t il'lasful'tiin 'x'tn i't<s as XxsOt'x fiili '

[83] Ifo- his* HR G· I A ts x'a xl>s xts sX'mfot'o xfos'st'.1 χλ,ο ^!>χη e a; \ s ' stj η,μι SO Sx'b t ( i'H '1 ’ > li‘> f a a t fo as X S X I 'art P 3 xk > > 8 < x'4 fo fo :3 j'sixxsige fnxx « rtghi virlmd -jointd MBir.-s- u» ?he ο;ι·χ of the sstx. Tbs' f'e n HRTf 1⁵; and the second tlRTF J12 arc tiltem lot nuLLfofo: the χ hmai sotAC sources m a predciSaiiSned efe¥«fomdh;4:is:kighgsi ihsu:.:ihst0f nciwl spsafctfok

[86] I Λ s's (>fl AV a :!./'! x’ r* >b ;ί v > 1 ii >1 A X _s ii V i i UX

2017200552 27 Jan . k Λ ' J hx X s k i I ’ ' 1' ⁴ &lt; &lt;. &lt; ,1 ' to. 1

[87| &amp;khW wife 121 wT.122wafeSs Wofephiw .of ewh of the feft top ekfeindlxigndl_:snd.:th®.right top-ehatutol+igofe fewgii ihe HRW

I i ,\i i VMT^!k«fs < topi' ' I Λ;ι 'to to ll lie' tsxiWtooW to ito: WtototStopriffeto ' M. i 3*. Wii 1 Ito, iH'fl 1 to t to. >. P to·. 'l?P '>M to 3 i.....A.J.’...toUi to

Signal a.nd rigixi -op > -gjiul axwrihng to the O'CaLcx otopuliiag the 'igaai and tftc kind ι + i 'X J ι ΐ 1 » -Λ. > if ii , ' n ;’ u ;

dxsiuis'l .isgtoil mcladw m the 5 vhiaaw χΐρίχηΝ 2UI.

fWf ht some ctcntpian» embidia ten to. the 31 > i-iaiind topA .duetn£ apparatus-Witep include a first xlehy unit tnot shston) arid a ^cosid delay sir Ί«; w 'W »ά to ttoe«u»Ί v ⁴ D J vxand a^{x 4} c id tot '_ ' „ j c toe ·. e „ χ a l xCx. +2 utopfilietx I ? l atxl ⁴ <\ and ife· .fitxi an-l xexi'Ud nto«v units. I h;x n nietoix? a satne result ,tx tlx*? to ' xivtitg rhe pum \ a iu' ·'’.s W ιΉ>in--d when Jekped vamex <is the filleted .xisittd stgnafe χ.ιη depeixdatp w iki ,-|s ax-'ts.

(Wt Th«· «ufput tout l «I ntwo the amplH is J left too ehanuel yipak the right k' d> tu h A.gnak su”d the ? ^batntcl s-x;nal 20> to <u t’-u: ths mised nsuuN -υ ' to'scirel χ m ii 2Q5. Tie ?-i txutoe; xipnal-i see euiput to ;-to x xpeekir-.

i:9ij In snotherexi'mpUix e^Kah^'cptx v'nen tanni'lxprrwL- an- jnptojth®:sp''mixto'' 210 imy M pZfl hi iiaitfii i'\en p\e\ ee I^!>di'eto. :1 ' 'lixi-iN aIs + ' I'D ^4: : x i e s nib le 't'it 'git' tot ' ii 'J ι x is' tCsistotl ti'tu a©?<

iktotoutog to to t tito shQWto.

itUj Nk ju J^Uxtii an ui ι χν is x n q.p p. -. Ito x v >„ > < „ x-.ti > uitoto ths ' Jilaal xi'itod xi'inee will be >val es'u rthat u. ar elextowii ai'toe and 'ι ι ' s ι s> Ih ' k’tsx’e x ') ‘1 . x ei ¹ kI s> x s i <>h ····.:·:.· :-··-·: .·: ••i'x··:·. ··?··:·. ·· ·:· .·· :·.·: ' ·.·:····.:··.·· · ·. ···:·:·. to : -· : -' ·:·: ·' · .· .· ’. s> .

wiwl xssnff ssastoe^ ’hytostop nisiptoxigjssftwi^+to'i hcnvccu·ifec kx a?sun or' w· '·>rninl

The. WINU soui J .χυακο nixs i, ux.x.i'adL<<%x>de i\k₁..\-'..i \ ψ < u,x a< is „ s? > oini>

i.\ xupu; itoto the axe?. I»·τcMuipfr. it. >.yanu.· appiieaitoi' ι·χ.λΙιιίι 'aU-iv toe ' txtoal ttotoid stototo i? lto.'jh?td nuy \ary depi'ndji'.g >a> thne. told toe f-dto dcteimhiing unn mas change the ΙΊΗ Ί Ϊ' as cording in the variation i>l the ι toiual xuund xviaxv incaiion.

[94] Ito C'Xiyh‘'C'Ji<>D xk'l xx eoetileieto deii'ie'siis «; 'into ι·\ο· sse’Ci-u no a: ka-t s<e >r xti amprifieuifsto (nr :toetoitoto;i ? ctx’ftk’k’to <to>J is sktosv xoeftieioiir uf the arpllxtoes' xistoiJ signal base»I 'to vtl least ime of a kuatki· mC ilur M'totoil xpsakMX a hi-to ion of iite \ fritoU stostid source totd a k+'itoon οι a iitoenc-r. IT ihe auiplifictoi· ·ηΑϊνηιν ».<όΜkmt dtoenxiining uini does uto retoptBi'.' the Ito+iion irifot'iTitokin <4 ihe hxtvner 11 ajxanee. 'totoitoplito.tol< « skkx six idem! toto'Cto·;' ng >ei toias s-'to n leaxloto sd\. pmr

2017200552 27 Jan 2017 ίΧ ' i nit! t t\ ft I ' X i\ &lt;

[95[ HU, 2 Kt r- .:J Rxi νχ^κπηοί ?·1'' -λ! Ju p xaLu r-.s pj >k -e 'ir '<<i awl > ,- ,^r a x _tEv .. \I' -< χ·'··.Χ U? ,’ί< Ι'Γι liliXX ⁵ ft! 6- x „ xi'i ii - ' -(*<1« bislxMoehL

[96j hi PIC 's^:R· jt ft'ikf eh^ilfttd shRtsfi fli;Xt i* itifehxWl in *»«·ί£*ϊτ»ϊ.·| «tlwhid ^111 et v<s *xe x <..e <> <k 'χ^! jfiH < ife<a< x 11 i <, - ί <. ',<,' ’ h 8 < ί x-Lm· s dw. I e . J ! < :···,. ..L..U . <!i u '·.. S J __ ' ,_________:.

[97] K 'Γ ox i pm a an ρ $ ‘ < <i i tf xll I ,x, t.X t i< . k 1 -,2 ί « 41 ix. > Xx } 1 , d 11 - A

I9S| V M GR H 2? i> seuxNi bkcdo'^x >.J<nrv'hhc <>· tK > ϋ^ιί -.oaftd Mjsixsx x<nd the first cbwmel signal is u-xxttutted ittn>ttgh xx fim I LR 11' 21' ί be kK4Uon in toymans el me virtual s*xand xoa^e mv -tKit'de elex abort .angle ift.fi>nujrins'₄ «nd horlztxftt.tl angle tntortmmnk

[99| The ixplic'iiLxi unit 22i lephiXt-e¹- ih>· fust e^!’ sex’t gea' Ot· i W p; tihesed \K<k ne ni Ui\x xk« aid xu .η I ( h » \> 4 x x ik_K « < * ’'\ <| '< . * <i ί ' n, K _νχ me fixxt k'hmnd signal ax t natty times a- the nomhe· of a<a\:<d _t \>l· x

[ ltO[ L· , Hi ui <sp'xi<L' x · 2x axle . x x > <, , -,-x x <' lx leplkxhed ftixs ebanoel xfruxtix ^ptxnxi.X <<srnixfx>Uih:ki x; me spi.iaLxx. bwstxi on al ;x!x! one of hKatien intoimmon ot the ueuial xpe.jKer, kKatjor· >;

immx; and kK-at'ton Irdmwioa of the vhhjid s^ifid .u«ue<·. Ik'.as^ifrK-sfioft.'ik'by ,i»il ?3: Λϊ'ψΐίΐχχ aiveii si x 'he ieplka'eJ uxc Uxu net xuuU- ’ e ·λ -< .‘he le e - >x nr ft k it Oft ο i X m >oft χ'> X ‘ x > > > ' '' ' X χ^*'' χ etiueftvl o'gn<s: tuxeti ox the delay e<x<x> ^tx h '•'xaneku> νη^χΗ^,-ηΐ. He a n.xi ♦'CaJon'dcLx utxt 2ΛΙ ma> xtnndu λ\χ\ ei? astjpeikatien six aikti^ uo'r wxd the delay ei the rephested fina ehuiiitel ^-yaJx haxeJ <xt the deuxmuR'd ampb*vfttie i ox . ?k' Kdtknt' < nr '2. axH _t and .;' ae aχ e eft -. a'na

[till] The aniplifk'ar'ton.'deiay u u; 231 gene tally deternitnex the antplifUatbaVdeLty coeiYide&t ot the replicated ihxt channel xigied ibs eneh ot -l-c. xpeaknx; hone ver. the <. t < ,<e auM a a it x x^'hoa > eteu . χ Cx t ,' d >x ο χ<<- u » Ή> o th xpe.kKe>i tv lx xqualto each othti when rtu uxotwiMk υί the Uxtr^er r aot ί b ... t xJ xt th x 2t < x emo v x a x.' ex , x¹ ^.«a η* ,.-x j - xt x et x i e-poctikek njotigb ’Jr xpeaketx, hi pait'xxktx nhet C e a'^pl Karor ae ak · an ’ ΐΙίΧίΧΒίΐί...autatn tnixktixitivn mh' ou u> i o tbxH x’< ,x t\ a xxd 4.w‘u tk'e'a, ^ηι» *'1 MS dek't'fthte t'r I xipl tiki.U’A>1>'L:\ ue’tk me h> , h:>h<. xeslo ax, ptvdetecttiiiMl salite pir an as bi v χ xk.;?i.

BG, 5 ta a block chagran· of a 3l> xoeax⁵ icur-sdeeitu; avpaia’es l^ixJ ι· ·ι '^Ύί/ην e yin a al soniid source loa pixxk'ienvdftad e»?x aUi-r hx u-snc e-ehcitnc '-χ^,”χ.χ oceerdin^ <' «tie x'.rpltn i ίχχ> re'i 5 χί< > ι, χ sb ; n> tix>. ' ‘_tv χ * t>< ,>l >< i

2017200552 27 Jan 2017 channel dgnal ,M& and & 1-efkch'saael. signal 30J fftsm th® fixch&nrsel signal and the signs® .w-'te ft® HWF111 wl fee/second. BWF112, (»31 ' -&5 glfisntoo ’Oproddcrng applfiftw IQO-.of the groxent -emWlftWin is i® ww as .that dnsgfihofti wife^: tMekefice Ιό H£U2 pxcppt thM' the wuedeffinpruienis <?? jl !l * U > H x ’f’ ⁵ 1 > < I I ⁴ i - I J _2 ^p i i pl f \Γ Bt id % <' ' h < i U < _i(>_t‘ -> < ⁴1 ή di <. ’kN 'UV· > ‘ lb' <' e < ' ik < - 1 fi ⁴ -e* t a v .g'.X” Jtii - Jis’⁴ et ' > |' 'v? i ·. '··.. tv' i ' \ _t\<, ’ 5 , < e , <⁴,1 . -n

[1W1 FIG.4 3$ u dsag-nxin showing ai’ cxarapk· υΐ .< 3D scnad icptxxlustag «ρρ&κκο lijy ifirlOC&Eztug & W&ifikSOml g5Odn®afia®d'Ci®A®i<!0 byodtpuifiiag e-sbannel signals duongh'' speakers in.e»^dinc⁴ to auviker e.x®inpia;y anb diment. [i®] FIG. 4 will be described based on input M>unu -agnr.ls. ^r-d then. described bused m snaoxl signals output shnmgb speakers.

| :W·; Sv '⁴“M)ik . 13» p r iut'i \ ft 'kF i ¹ κ ' π Ό. ⁴ Ί’ e''xha a clssg fat a eauea fiv .net s-g .1, j tee xgl't \luan> I -x ./. ’ ιό <’? ad scad (ue?‘iu'Ue x > as >. \ i| d < Γ\ν a nd K im <jpAaaiu> 100.

Inc*io l a u v i e sk<h >Im χχ ’ ’ hee't c ^ιχ '< υηκ det _[(,»_;t. as s K’vK% B. W then, is traurtbos'il M a hs>ni h η χ.χΆπ.

Π® ·Ι1^::Μ1:δαρehsnnM MgiW passes matgh an HR ί ι- ^ηχροηΑπ^, tcan cicvh«>o ’ j\ O< la > th ut x <i {)«' ftt’e ds t<. \ <. s 1 s> e >. ι i t signal >.

PthH T'sO <^} shi a Μ,»#χίί< can <χ.\χ <» \ isd >x * ft tbs ; tghi. ftsp uvund xmiix. U «‘UVs'xewpLd's e”:^ χύνουν a®· nuaiie ibc l/i ι< μ disanel stgiuft dui r·- <ν®Τκ%, by the tacxe _\ eft”, ihe ”e Ί u'puvune sc·’ J the raised -d-and aux be R'pftvated firnsΐχν.,- .-isivA Ον rfwsn xrd egiui^ »« ainp sfieu λ »* «ΐ in I »x atjxe s’'»»' ” , , ' ·.. o f ift s i^>x r u

U'»i· Ml sydcx>.\'. The other ok the m«4 sigrum 1' car JLile^ uutpd ilwdt the left top speaker

Π lOj T'A'u leinc-map Jeff top eiUfnsd sigacl· ^av aihed <d;h de fight t<?p chasiml xie.iai *\⁴ n xp’j ifkxl x ths, a< o UU ⁴x < xo o_ jJ ' ex. e i' «nd then, is niist'c \s ’thfv r, a f’gftt >>aυ el xtjnal t\-. oiepsK tbuveh\be c~r ί anaekac· i;bs <nhar a:san® r-sixed n.a tb , v 1 >x x '_v t>™. a' * «. · ouip't

Bu'oijgh the right tap speaker.

ft IIJ Th® rear left channel signal d rahed g nF ftig tight iop chatnu I den ft tWfe aatpiified by the factor D and the iefi top chdtnel sign/ tbai k* xtnspaned by a factor 1'X A. and ie oolptn tantugh the rear left speaks?.

i H2: I Xx Ctnuct x h0’0x4 iho XL· xs sea voted nsto co st; .’ xtst^'' ftv eg vdk&lt; &lt;.· i’b't

2017200552 27 Jan 2017 fikmntd aignafi fcaferutfttfi fiftst·· .¾ feftfi mfied with -fi&amp;® at left' htwntd figiiatta® mtptfrfiwttgh th® feitht left-sp^ter.· Angfier rufiitefiffi neater ®lfiW®lfigWlfi OeWiftifi kftftftfti&amp;w :¾ $$Wrttttit_; ft·;S0£ttftM. ft©;ffttilt: fight:.

fetbifight spgitfe® Tbp fthft fit th® ttp&ated e ei Jun ©I χ * v\ s lien < >-< I v s ·.< e ί , ₄r>e ft ftp t « < fie >. nt i speaker.

[I fifi ift ’ V i_v ?’ fit )k KVi M'iVl· Hi in' I ’ ι Ώ U . < i 3 stritphfied by ttse'ta®&>rifisi3;tftft<s fight; s£jp;ft:ia:iine.l gigp&l fislfi fift ifttft'

DtA. and ftea.« mrtpm frmigh lite rear ugln spcAct.

[114] The right w signal purtsea finiagh a© HR IT corresponding k> an <k'vsuon that is

4ft fighei that* fiui vi fte apbt top speaker and C: al ft stpbaJe» hip ioui uftfis, £t 1fi]^: I *o \ahi Lop ftunnft ingnaK tft n»>vJ 'a Uh the lett a vb^nf*·-'¹'u>vi mat a antphiied bv the :seit>r A, <tee ui the mixed shnfts is ampfriid hx the t&:ηι i\ .md κ a ft. e ' d ft. <. t . 'tn I - gii d n <> > ft >. ft ^! <

ofies ft the i n^el μ^βΗχ a ? > a. ftH b> ' » L v\« L. 4 >s >«_ti !’’\\'/f Vie ki.

κψ jester, |;. ft] I 'epheated nght topehanaei ftpnai »ητ an plsficd ft< ft® uei<s: \, and <ev tmxsd © sft the ieh Mpkbanin'i xip'n A, <a _k>\' Ljis is antfl i vd ft the Τκκ>ι D.

iwi wixMwB :he ie;© .tfiftf ehaftftl ftpnft: wd mfttfirh roe ft -ft© sear -fightspeaker. The fther >4 fie mixed xftnak is ampittled >y the Τμ<« E„ aft e> eftpiir ’bmugh ft® right iup speaker.

IftlTj The ftftt fight ehftftl signa’ is rafted with fie Λ·ί?αΓ >. hantx'j .\iftfi that A ft ' s< b' s un Β \ Ό ^tvu is x. ft ft ft | ft lllli fiftftceft ftift.ftftu >.ft tbftiy ontpet thmegii ihe fteft.ess arter the fibrwft dessrtftd proeesses ate sx h>bows:

I iifi] i rent lefi ekanntil ft’trd + fttnei ahsiwei M'tiaS n output firoeph the fiont left speaker;

1120] fti, ktftlne te sgn\_vj. * ft. χ»ρ^ α?ι.χ.^ utfi \ >ft 'Cfthftft.iftftiS iWgfit ftftift the· ftfi: Iftiftfttft;

[tfil] <tk tkgft a n 1 ftita’ \ tjt a t im ¹ > s „ Ftowgsmien fit- nxaftan · ί· .3ς_:· ·: · · ······[ififi] A uenk i' eba mfi s-gnA' ts ntitp’a t' .nr '1 the <en;«'i a₍«xise :

flfifi] ftftftftsp ft ό sg'< t\'\Fsft. >j s <' ft . s ft eftlbsmfiftnifttghr tqp spgxjkm/ |J,?A] t ¹ teft tints nd iftmeft*© ht st„ ' k k ^! iitd tftth is ctstpei tbrottgh sgetfiter:: at$

I’ifisJ tfixmtifighl fiisstwl figsfift ©imter ©hssninl signa®) fcfcs-a fights npeaket.

2017200552 27 Jan 2017 p br FKi. k fee gafe 'efews· Mmnfedy cra-tew®! rhe diwmtfl fegwfe are merelyrkwslpfes.v sad ww gfife wfex dw.ffiay ifetfej- ifrMdli-sp&amp;alw and iho fight speaker ofeph? eorfwphhdiiig t^aaw sjgws tjwbe wed.,· fe addinoh. fe fetw ewmfeary enibfeferfefife., safe fife uMfer wfeufete fee. fewwd sfefedsrfefe feo tfef ct’riPajMihd fe. die:

: i Λ s n e fl ¹ ji( fx c i * ί,ί 37 ί -M& « hi A fedfeWt feWafe W hWihFfe.fe a,® fefefe..fepifefefe'ife:afipsfei:w life fi jxxa i uv i x re ti s x <4 \ ' < unii \fl .' > ⁴s ><r 'p ⁴ ΰ<>* 'iigeal·.; femasfe ” speakers noowfej!-' to ;n:<?tbi:r exerirplar·, ernbrferuienr.

.[IM! -'£> sttbnd R'pnfeaemg ^pp»Ui>u»s Miv^uiL 1 lu, 5 r- ru sam 0 ukU shcvui in feGa^:herscefe: feaS:s0aM^:e<w^aih«iK^:fepai:fiiifexfe: HRTF arxi afife ·. el s. wtefe fegnfe and x femt rpifet ciaweLstgifeL. Thwefiw,. wnd;§l^^Wp<:'ifei neb fi&spefeiwe are w feiknvs:

[W[ ifefet w dfeifeM fe3fefehfee;feofelfefi iipfeikgfe

I i30] Hxe bft feumsR signal - fee ΑηΑ fell» fesunes m^i x * hvip ssghifee artel sfenabi fe oafetit tfe»wgh tbe wr lets |^J fees tWl Luhoni 'eh Unm a¹' op tub \ > fieeusprec umk\ mg’ul imx qv t «>v xflt i> *ρ sptxikei':

I k'2; -f -eenfes ciaianfe shiuefi !>< mrfeid thmwh rhe wsher speaker;

ii 3 fe iBfefeni feghtfemnel χ feafe (Λ ·; ciwfefe s'ighfefe- ifi ifefend A w^lite right fcs>p Kpraiker'.

H 5 H w\u· j'fehr feurwl fipa.fl * fer rfionr right fena.mfe s-en.fe A ·?· b >,<h· kfi· fe wurei si anal t? fe νηψιη fewagh fee rear fight ,-nraker. mfe

[.13,71 Vm x „bt fe«.' x »g\ x 4 x K>s„m , s olWi > <>u„ , x e 1 o'it uu spefet.ee

I i36| 'i Ai. C> e a feagram shownr^ eennpk' of a 3D srnafe rqeisfeicmg apparmus 1 fes ha befefemg ,»\ ''rnfe M>vad souiee ιλ $ by oin^w-mg h x lamufe *ipefes thivuphd speakers, -aeraj^hg· ?s> ajiofeer exenxplape 'esfiafeimeai.

Π 371 The ?fe sound ropxoJMehur χρ^ΛΤΐΐ'- »k* of Π’Λ o ;s tlw same as fear shown fe FIG.

x*\sept ioi flan tbeOxUpia mrtuls fefe me supposed m >>mpm fei'exfe the b.fe iop speaker tfre speaker ha pg. top channel Hpnal Hh are fee ·\.Τη sop spedes sfee sgx dm '·.< fe'srji to> fem e iu'i tfr ' < \ οί,ζ x - x 0 1 <>, t ho iiaessker ithe spettte'wre fee fear ei u „ v > 't .4 s>> 1 r z [ <k<

fees|vslo A>; fee hofe £<eh:sbaui'fe goflrfe amp^o efe Γόρμόιι nJ N'slpfes >mipr5 feresigh fee speakers » as .MMowst

[fife] ^A’ern fellfefennrl s\a>ul Keerici eh-eufe s^ua, dl- > Ls t w: kfe chm'efe ogabi X 'f feofe πρ\1 xstgufe i ;s iAfl-pm 'b’-ouyh fee hvni kfl’r spe,:kvr:

I ίο9[ jcitf k'ftebxisuv sipt«r -- IXfront le’t ohms a ssge„ - X --1vari righr channel

2017200552 27 Jan 2017 la 'teft speaker

[ i 4tp =A tvehter channel signal) A output tbnsugh the cesw .speaker:

IMl-J Ofifiopt ehwwl Ab feksfiel gigMlM is.sdtpat thrbugh flw +:.gh:Lk;:+'+p+;+:+;··::

[i42] u'AU'dph; chaues·'! -sgnal -s UhftusJ rfUc^:x?nsu! AuK' - low At: eha wl tM:WAA®bt sjjfeWrt +M j :.4.+ ICS IfiStU Ό¹ t >. u' 4+ H! '. i o > r rt ί 4 ,. ’ Slit [ :+ <jidl X-fh’Mlk s eh ++. I -i£. 2> . +4 >4 ' <Α'+' t + u ++ + .

[1'44] 11) :''< p4 + <>.,<.. \C\Lij. I k <. A, + i , + ^! <^l!. <. /·. t< I ifrw4:++++:+4 elevatiots n+e+rdsng ++ +« exentplany c+Sibodh'iSi.+5t

I_:H$| file tfpeuket· -0+0+.+ ot 1 ICs. ? +kUdt+ + ee.+e. xpent.es ’’ s&lt;k + kont Wt speaker W_;-_$: a trosst right XjXiakcr 722, a ++ tert speakes- 731, and a +j+s ngnt +++++ +.

[144] Λχ described above with nsfes-cnve to FIGS. 4 through 6. ++- loesriinng b vsrmal s;++d+++4:e to a poxie+i-n+i+.l 44+:8++.;.: ief? top ebi.+i·:: sig.+s. and :s .-+1-:1 top dWftbi. 4t|Wtfekh44k pWkfl tbrisagh.rt fit W W: WsHW^AiirttUsiltkUd: by+gw .xUae* A<\ as* >h..tnt+'' ««x'odtug ⁺o th< wku. +nJ v.-e +e ».++ +0 be tu. ,t seft λ'Γ+^Κολ Arthi oofst ngl't xpeake*' '22.++k-p kit ρ?·Α«+ < χ’. the .ea »i_t:ht speaker 332.

ΪfOj Ahh.+sgb ;toi x'hown ns IIG. 7. a kft sop xpe+4 e>· »n> ·* *kw »>'. ++4 a n^wh> »op *pe ises (r+k sho'Mft Η+ν be disposed above she fro·:· arts .<f+.4'e·'anrt t. e tow > sghi ttpe.sk« ⁷2+< ht tho soixe. she tert, top ehsunset >igneJ and she ught top ihanstei sigs'.j! p+s+issg through the filter 3tx: arnplifsed by rls>. a As 3 Av fh.si .+>' At':', .vstf .AXOiAag .0 Ar ·-++ skAx oed t .V’tlsnl·' I e b-A to vxeke rt.w k V'isA vet

W + the se>n id: w-tUa h.au'Uxt'». u: Λ .-32, fh® b iwesti/ex that the virtual sound vOtee »- hvJi/eJt t>< a p’vdAirnnied ele ++ skirth· et Ov<) η ' χ > <χ \ _s o’ <. < ' >. : ,. -+ .+ iifemiwouigtOtwtgh-one-!0^^:twMs^k>'»x k> nv xp< m r Extent t ·ο <- w o t th® llito'd left top chaauei ssgri+101 dte φίν +..ψ xhtumel xignii:U.^wted.-U--<m:t«--iiW!e. ape+ki+v a bx'+tius; of the virtual sound χ»>ηκ·& us + k-ft-aixlrtight &sMtkMihuYte iMjdSWx

I pt] W+n dse > .tu a’ussuxu ++ <- <’Kh+.kJ un.xc < 5 _ xe-u s ed efetatso' ih ot the ow .els xpuske- At k ο Π*+Ήη ^sv g+W- ?A the o+< A* i-p+sKiO AM smj^ »'w :+As. $x»,akej '.v nsl| a’d . kit·-.ed-lett top ++:+1.nghi top x \ htel x gsui> “s o, x 4\ 0 + r»h + Ή i 'c es sgt χ?< x> ’V' r>xs' ots^:t|p:si eseTllfewd'Mtb.sp.+MrtrighfiopdwmldgHd+ Iwx*όι«- rxr+ip-l+s^ ent bsxhinestb·. at lettirt one of the Hite-red left ++e and s'sghi top ah«i et. AgeA- nw l+ os qnst thswgh -ita· center speiikes: 7111 rfcwovep.itebenw xpeak e: 0 dot nn· +o8<ht+' +^! .ae ,td'tb< wet x*t Ao '0+ 4 W’ 3 n;v it xssetki tax- is' v +4

2017200552 27 Jan sad-fishi fifecdotp f ttO] Whan ills dnsimd'thitt (hpfifiwi oil».!.swiye/lu'3<datpi.l;ai a right 3id& lira .predeiixmwJ elex-aikm, ihi- frost fight -pukm' '·2~, the iVai' left :>gf.-akci 73). asd the it-m

732 siiay ihfi fiUeml: left ifip and light top chaste idgnate, fid I] 'Wiieii itM dfefitgitihiil tha pfifihl ifiubOtWh Abo «wtfiTMa ;Μΐ: fidhim 'a -;piMdr -· s? I ' o_} ) _s Ju &lt;{ ‘Si i\&lt;. Ί Η &lt; ΐ 1 ' ’ &lt;. *&lt;) &lt;1 aft ’ y &lt; ₁¹

Ήχ,ν k'-^! &lt;,'- ! ' 1 \tf \ Ml It - i 5. 'i i ίI 5.fi Exori when it jx dexhed that the ‘ir-m.d ««md .«w* be locaX-J al the π ahi or Ids «Λ⁴ in the piedctdarmird e&amp;wiiorL the iduxeu ieit top and right top clwaucl dgiUL 13i tip is ϊ &amp;i»8gh. te .rear W spefife 77-1 w'd :lie uer -fight: speaker 732 aery rot be muie&amp;

pddf I» Mtf-v euw^y niimonw, the ot Cw x uaai ^nd bi ihe Wsi ip'” ,i star j Jih be ι i s Ί > >io hi * ί^! i *«> j e b y > ι saiwhog she hm km as, 1 -xgl'i lop eheonel u'Hsh. xvehoui mums. ft e F’Vn-d leif aiiJ '.gi'i bo k.VUX x gaa ’> OBtp xl Άΐο af' - es - ,xf'‘x

I' xi[ hXl· x fi a fk'xxehau ahsiMtMC a 30 χου_ξί i ορπν i -, p method ,\em, mu m an exemptsy a Bbxxhrnem

[ I Sb] h χ\’ί< ο M I* xi ' - \ I <s I s I I o p> din» o pxxleiermwd eh-x aix»n<

Π bid Irt op upon the fllpud: i^pihwd ro gpwpe wj>r ,ww ier-Hea sound dgskilx,

[ ''''I in OiXiUtioa Xh3U. W B »st ♦ \ o r ix$ in' «_ν K m> m u , \ >' ' Ύ I uo< hn. ο ,^ϋϋ <··,·> -e-ps Ou o x\ '« <·ι. < s’ ί 3-..1¹¹ w'll t\ ovtpiK.

Π&Ι inoneraise V V Ci'i. \ a » >| κ i χχ x J x ** i _t> hxx. » I ’ tvom'A xvswfpmde p xpvakx i s, p 5^!-^!· la in- mlissii.ari:, ertop.s;p^MF3i>:lnstaIM at s. dexlri-d oicwnP··: i-s o-xier K¹ oi-qnn a s®wd sigi«d Ppg i;i'i;<<r;iie<i at the eievpkea hoHexei, h b not exiy tv mxpli die u»p spx&u the celhip. Thus the usp xpe.&er ΰ; genes ally pkived ub- n e ihc tre-r i xpeatox xehk'U may eanxe xt demised < se'C’e· m »v uvt be sp',<.xh\e>k p?®i tom.the.Λ oltP xound «oxiice h Puhs-ixl io « de-area PPvm h¥ wn? <re HR’l K the .oea s? mon sd the x sntial sound su-ue max he p?rtormcJ s’ftiX'nvi'l·’ m the lei'iaraiiisnsitdmxs or $i bs mil 2 pl iw *- n o.e ’ ''is < i> s 4, ‘eHlR^-i n»t surtxbk' ϊοτ fepaiMpp thP virtphl swpd'wmvn ·> ar: :'·.'·<-v«tbs:< 1 hist ss higher or Kiner them, ihal <»filw8«tmJ. spukeex, lilin’mhwL aecrPistg to the exemplary cmbodlmentx. oneoj n»A‘ eiumnd sigrutU passing;tlmueh the HE'l'f·' are ampldled by gen- '. ahmx ihr.t sre dxfierrnl ii<>:n each <?fer seimdirm to -la- xpealxts, ;sml are ow.pw ihtsxup.!: the speaker--, m this nunnei.

2017200552 27 Jan 2017 the virtual sound source may be effectively localized to a predetermined elevation by using the speakers disposed on the horizontal plane.

[162] The exemplary embodiments can be written as computer programs and can be implemented in general-use digital computers that execute the programs which are stored in a computer readable recording medium.

[163] Examples of the computer readable recording medium include magnetic storage media (e.g., ROM, floppy disks, hard disks, etc.), and optical recording media (e.g., CD-ROMs, or DVDs).

[164] While exemplary embodiments been particularly shown and described, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the inventive concept as defined by the following claims.

[165] Where the terms “comprise”, “comprises”, “comprised” or “comprising” are used in this specification (including the claims) they are to be interpreted as specifying the presence of the stated features, integers, steps or components, but not precluding the presence of one or more other features, integers, steps or components, or group thereto.