1 1 3 Research of a surround-sound field adjustmen system based on loudspeakers arrangement Akiyama Daichi 1 Kanai Hideaki 1 Abstract: In this paper, we propose a presentation method that does not depend on the placement of the loudspeakers for the presentation of three-dimensional sound field by the surround Specifically, we propose a method to correct the surround sound field adjustment signal by the signal processing to reproduce surround-loudspeakers arrangement the same as a standard if placement of the loudspeakers is changed 1 36 1 2 2 [1] 1 School of Knowledge Science, Japan Advanced Institute of Science and Technology 1 Presently with Research Center for Innovative Lifestyle Design, Japan Advanced Institute of Science and Technology *1 ITU-R BS 775-1 5 8 *1 B2L9QGQ 1
[2] 1 51 ch 51 ch *2, 22 9 18, 2 36 72 18 1 18 216 252 288 32 1 1 1 5 ch *3 53 5 ch 398 2 3 1 ITU-R BS 775-1 51 ch *2 *3 2 [3] Wightman Kistler [][5] Wenzel [6] [7] [8] [2] 1 ) 2 ) 2
3 ) ) * 1 ITU-R BS 775-1 James 5 ch [9] James Ki-Seung Ki-Seung *5 *6 [1] Eugeniusz *7 *8 51 ch [11]SONY 51 ch 71 ch AV * *5 *6 *7 *8 STR-VZ555ES [12] SONY AV TA-DA56ES [13] 3 31 R *9 Θ R Θ r 1 r 2 R = r N Θ = θ 1 θ 2 θ N 1) N 5 ch r 1 θ 1 2 r 1 r N θ 1 θ N R Θ R Θ R Θ Θ *9 3
2 31 Reveillon [1]2 1 A A A p 3 A A A = cos 2π p ) 2) 2 5 ch r 1 θ 1 A = sin 2π p ) 3) 3 32 2 2 3 [2]2 2 2 33 32 31 Θ Θ D = Θ Θ = d 1 d 2 d N ) X Y X = x 1 x 2 x N Y = y 1 y 2 y N 5) 2 2
D W X = x N x 2 1 x 3 1 x N 1 X = x 1+1 x 2+1 x N x 1 8) wd 1 ) wd 2 ) W = wd N ) 6) N N diagm) * 1 wd n ) wd 1 )x 1 wd 2 )x 2 = wd N )x N ) ) T 1 1 1 diagw X T ) 7) n n + 1 n 1 n + 1 X n 1 X *1 M N N W W * 11 Y ) ) T Y = 1 1 1 diagw X T ) ) ) T + 1 1 1 diagw X T ) 9) ) ) T + 1 1 1 diagw X T ) W W W D W 3 wd n ) = cos 2π a ) n d n a n 1 1) *11 X X 5
W W w d n ) = gd n ) sin 2π a ) n d n 11) w d n ) = 1 gd n )) sin 2π a ) n d n 12) 1 d n > ) gd n ) = 13) otherwise) a n 1 1 12 13 a n 1 d n > ) d n d n+1 a n = 1) 1 otherwise) d n d n 1 1 2 n D D * 12 n D A 9 A = D + D + D 15) 1 1 11 James [9] *12 X X 1 1 * 13 36 72 18 1 18 216 252 288 32 1 1 1 5 ch * 1 3 5 23 2 5 1 12 6 7 8 5 answer 35 3 25 2 15 1 5-5 -1 36 72 18 1 18 216 252 288 32 6 standard degree 5 ch speaker position correct answer answer average standard deviation *13 *1 6
35 3 25 2 random 1 t 635-1935 167 183-585 answer answer 15 1 5-5 -1-1 7 35 3 25 2 15 1 5-5 8 36 72 18 1 18 216 252 288 32 degree speaker position correct answer answer average standard deviation 5 ch randomadjust) 36 72 18 1 18 216 252 288 32 degree speaker position correct answer answer average standard deviation 5 ch 252 288 32 1 5% 2 2 2 t 755-932 391 517-2782 1 21 1 2 2 1: 2: 3: : 2 1 2 1 22 3 9 1 answers 9 8 7 6 5 3 2 1 standard -> randomadjust) C L Ls Rs R 9 speaker 3 anti-clockwise same clockwise 7
3 9 C R 5 CLLsRs R 1 5 answers 12 1 8 6 2 random -> randomadjust) C L Ls Rs R 1 speaker anti-clockwise same clockwise 1 13 a n [1] 51, AMEI NEWS 3, 2 [2],, 21 [3] Morimoto Masayuki,Ando Yoichi, On the simulation of sound localization, Journal of the Acoustical Society of Japan E), Acoustical Society of Japan, 198) [] Frederic L Wightman, Doris J Kistler, Headphone simulation of free-field listening I: Stimulus synthesis, J Acoust Soc Am 85 2), February 1989) [5] Frederic L Wightman, Doris J Kistler, Headphone simulation of free field listening II: Psychophysical validation, J Acoust Soc Am Volume 85, Issue 2, pp 868-878 1989) [6] Wenzel EM, Arruda M, Kistler DJ, Wightman FL, Localization using nonindividualized head-related transfer functions, J Acoust Soc Am 1993) [7],,,, : 1, I), D-1, I,,,,,,,,,,, 2 [8],,,,,, ), 1326893 211 [9] James R West, Five-Channel Panning Laws:An Analytical and Experimental Comparison, Submitted to the Faculty of the University of Miami in partial fulfillment of the requirements for the degree of Master of Science in Music Engineering Technology, 1998) [1] Ki-Seung Lee, Seok-Pil Lee, A real-time audio system for adjusting the sweet spot to the listener s position, IEEE, 21) [11] Eugeniusz Kornatwski, Stereo to the Real Surround Sound Conversion Algorithm, IEEE, 211) [12] 51ch61ch 71ch DTS 96/2 AV http://wwwsonyjp/ CorporateCruise/Press/229/2-95/ [13] TA-DA56ES http://wwwsonyjp/ audio/products/ta-da56es/feature 1html [1] Curtis Roads; ; : 21) 8