Source: https://patents.google.com/patent/US9913064B2/en
Timestamp: 2020-05-28 23:07:16
Document Index: 561926250

Matched Legal Cases: ['art 3', 'art 3', 'art 3', 'art 3', 'art 3', 'Application No. 103104152', 'art 3', 'art 3', 'Application No. 03104152', 'Application No. 103104152', 'Application No. 103104152']

US9913064B2 - Mapping virtual speakers to physical speakers - Google Patents
Mapping virtual speakers to physical speakers Download PDF
US9913064B2
US9913064B2 US14/174,775 US201414174775A US9913064B2 US 9913064 B2 US9913064 B2 US 9913064B2 US 201414174775 A US201414174775 A US 201414174775A US 9913064 B2 US9913064 B2 US 9913064B2
US14/174,775
US20140219455A1 (en
2013-02-07 Priority to US201361762302P priority Critical
2013-05-31 Priority to US201361829832P priority
2014-02-06 Priority to US14/174,775 priority patent/US9913064B2/en
2014-04-15 Assigned to QUALCOMM INCORPORATED reassignment QUALCOMM INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORRELL, MARTIN JAMES, PETERS, NILS GÜNTHER
2014-08-07 Publication of US20140219455A1 publication Critical patent/US20140219455A1/en
2018-03-06 Publication of US9913064B2 publication Critical patent/US9913064B2/en
238000004091 panning Methods 0 claims description 80
230000001788 irregular Effects 0 claims description 45
p i ⁡ ( t , r r , θ r , φ r ) = ∑ ω = 0 ∞ ⁢ [ 4 ⁢ π ⁢ ∑ n = 0 ∞ ⁢ j n ⁡ ( k ⁢ ⁢ r r ) ⁢ ∑ m = - n n ⁢ A n m ⁡ ( k ) ⁢ Y n m ⁡ ( θ r , φ r ) ] ⁢ e j ⁢ ⁢ ω ⁢ ⁢ t ,
matrix ⁢ : ⁢ [ h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 0 0 * ⁡ ( θ 1 , φ 1 ) h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 2 ) ⁢ Y 0 0 * ⁡ ( θ 2 , φ 2 ) … … … h 1 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 1 1 * ⁡ ( θ 1 , φ 1 ) . ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ … … … … … ] .
The size of this matrix may be V rows by (n+1)2, wherein V denotes the number of virtual speakers and n denotes the SHC order. hn (2)(•) is the spherical Hankel function (of the second kind) of order n. Yn m(θr, φr) are the spherical harmonic basis functions of order n and suborder m. {θr, φr} is a point of reference (or observation point) in terms of spherical coordinates.
[ VBAP MATRIX - 1 R × V ] ⁡ [ D - 1 V × ( n + 1 ) 2 ] .
[ Virtual_to ⁢ _Real ⁢ _ Speaker_Mapping ⁢ _Matrix - 1 R × V ] ⁡ [ D - 1 V × ( n + 1 ) 2 ] .
VIRTUAL SPEAKER REAL SPEAKER 300A 302A and 302B 300B 302B and 302C 300C 302B and 302C 300D 302C and 302D 300E 302C and 302D 300F 302C and 302D 300G 302D and 302A 300H 302D and 302A
P l ⁡ ( ω , r , θ , φ ) = g l ⁡ ( ω ) ⁢ ∑ n = 0 ∞ ⁢ j n ⁡ ( k ⁢ ⁢ r ) ⁢ ∑ m = - n n ⁢ ( - 4 ⁢ π ⁢ ⁢ i ⁢ ⁢ k ) ⁢ h n ( 2 ) ⁡ ( k ⁢ ⁢ r l ) ⁢ Y n m * ⁡ ( θ l , φ l ) ⁢ Y n m ⁡ ( θ , φ ) ,
P t ⁡ ( ω , r , θ , φ ) = ∑ l = 1 5 ⁢ g l ⁡ ( ω ) ⁢ ∑ n = 0 ∞ ⁢ j n ⁡ ( k ⁢ ⁢ r ) ⁢ ∑ m = - n n ⁢ ( - 4 ⁢ π ⁢ ⁢ i ⁢ ⁢ k ) ⁢ h n ( 2 ) ⁡ ( k ⁢ ⁢ r l ) ⁢ Y n m * ⁡ ( θ l , φ l ) ⁢ Y n m ⁡ ( θ , φ ) .
P t ⁡ ( ω , r , θ , φ ) = 4 ⁢ π ⁢ ∑ n = 0 ∞ ⁢ j n ⁡ ( k ⁢ ⁢ r ) ⁢ ∑ m = - n n ⁢ A n m ⁡ ( k ) ⁢ Y n m ⁡ ( θ , φ )
[ A 0 0 ⁡ ( ω ) A 1 1 ⁡ ( ω ) A 1 - 1 ⁡ ( ω ) A 2 2 ⁡ ( ω ) A 2 - 2 ⁡ ( ω ) ] = - i ⁢ ⁢ k ⁡ [ h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 0 0 * ⁡ ( θ 1 , φ 1 ) h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 2 ) ⁢ Y 0 0 * ⁡ ( θ 2 , φ 2 ) … … … h 1 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 1 1 * ⁡ ( θ 1 , φ 1 ) . ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ … … … … … ] ⁡ [ g 1 ⁡ ( ω ) g 2 ⁡ ( ω ) g 3 ⁡ ( ω ) g 4 ⁡ ( ω ) g 5 ⁡ ( ω ) ] .
[ A 0 0 ⁡ ( ω ) A 1 1 ⁡ ( ω ) A 1 - 1 ⁡ ( ω ) ⋮ A ( Order + 1 ) ⁢ ( Order + 1 ) - ( Order + 1 ) ⁢ ( Order + 1 ) ⁡ ( ω ) ] = - i ⁢ ⁢ k ⁡ [ VBAP MATRIX M × N ] ⁡ [ D N × ( Order + 1 ) 2 ] ⁡ [ g 1 ⁡ ( ω ) g 2 ⁡ ( ω ) g 3 ⁡ ( ω ) ⋮ g M ⁡ ( ω ) ] .
[ h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 0 0 * ⁡ ( θ 1 , φ 1 ) h 0 ( 2 ) ⁡ ( k ⁢ ⁢ r 2 ) ⁢ Y 0 0 * ⁡ ( θ 2 , φ 2 ) … … … h 1 ( 2 ) ⁡ ( k ⁢ ⁢ r 1 ) ⁢ Y 1 1 * ⁡ ( θ 1 , φ 1 ) . ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ ⋮ … … … … … ] .
[ g 1 ⁡ ( ω ) g 2 ⁡ ( ω ) g 3 ⁡ ( ω ) ⋮ g M ⁡ ( ω ) ] = - i ⁢ ⁢ k ⁡ [ VBAP MATRIX - 1 M × N ] ⁡ [ D - 1 N × ( Order + 1 ) 2 ] ⁡ [ A 0 0 ⁡ ( ω ) A 1 1 ⁡ ( ω ) A 1 - 1 ⁡ ( ω ) ⋮ A ( Order + 1 ) ⁢ ( Order + 1 ) - ( Order + 1 ) ⁢ ( Order + 1 ) ⁡ ( ω ) ] .
determining, by one or more processors, a difference in elevation between one of a plurality of physical speakers and one of a plurality of virtual speakers arranged in a geometry;
adjusting, by the one or more processors and to reduce one or more of a localization error and inaccurate elevational sound reproduction, an elevation of the one of the plurality of virtual speakers within the geometry based on the determined difference in elevation and prior to mapping the plurality of virtual speakers to the plurality of physical speakers;
generating, by the one or more processors and after adjusting the elevation of the one of the virtual speakers, a renderer that maps the plurality of virtual speakers to the plurality of physical speakers; and
applying, by the one or more processors and to audio data that describes a sound field, the renderer to generate a plurality of loudspeaker channel signals for the plurality of physical speakers that configure the plurality of physical speakers to reproduce the sound field such that the reproduced sound field includes at least one sound that appears to originate from the adjusted elevation of the one of the virtual speakers.
wherein adjusting the elevation of the one of the plurality of virtual speakers comprises projecting the one of the plurality of virtual speakers to an elevation lower than an original elevation of the one of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
wherein adjusting the elevation of the one of the plurality of virtual speakers comprises projecting the one of the plurality of virtual speakers to an elevation higher than an original elevation of the one of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
wherein the audio data comprises a hierarchical set of elements that describe the sound field, and
wherein the renderer performs two dimensional panning on the hierarchical set of elements when generating the plurality of loudspeaker channel signals for the plurality of physical speakers.
5. The method of claim 4, wherein the hierarchical set of elements comprise a plurality of spherical harmonic coefficients.
6. The method of claim 4, wherein the two dimensional panning comprises two dimensional vector based amplitude panning.
7. The method of claim 1, further comprising determining one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers.
determining one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers; and
determining a difference between at least one of the stretched physical speaker positions relative to the position of the one of the plurality of virtual speakers.
wherein determining the difference in elevation comprises determining a difference in elevation between at least one of the stretched physical speaker positions and the position of the one of the plurality of virtual speakers, and
11. The method of claim 1, wherein the plurality of virtual speakers are arranged in a spherical geometry.
12. The method of claim 1, wherein the plurality of virtual speakers are arranged in a polyhedron geometry.
13. The method of claim 1, wherein the plurality of physical speakers are arranged in an irregular speaker geometry.
14. The method of claim 1, wherein the plurality of physical speakers are arranged in an irregular speaker geometry on multiple different horizontal planes.
a memory configured to store audio data that describes a sound field; and
one or more processors coupled to the memory, and configured to:
determine a difference in elevation between one of a plurality of physical speakers and one of a plurality of virtual speakers arranged in a geometry;
adjust, to reduce one or more of a localization error and inaccurate elevational sound reproduction, an elevation of the one of the plurality of virtual speakers within the geometry based on the determined difference in elevation and prior to mapping the plurality of virtual speakers to the plurality of physical speakers;
generate, after adjusting the elevation of the one of the virtual speakers, a renderer that maps the plurality of virtual speakers to the plurality of physical speakers; and
apply, to the audio data, the renderer to generate a plurality of loudspeaker channel signals for the plurality of physical speakers that configure the plurality of physical speakers to reproduce the sound field such that the reproduced sound field includes at least one sound that appears to originate from the adjusted elevation of the one of the virtual speakers.
wherein the one or more processors are configured to project the one of the plurality of virtual speakers to an elevation lower than an original elevation of the one of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
wherein the one or more processors are configured to project the one of the plurality of virtual speakers to an elevation higher than an original elevation of the one of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
19. The device of claim 18, wherein the hierarchical set of elements comprise a plurality of spherical harmonic coefficients.
20. The device of claim 18, wherein the two dimensional panning comprises two dimensional vector based amplitude panning.
21. The device of claim 15, wherein the one or more processors are further configured to determine one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers.
22. The device of claim 15, wherein the one or more processors are further configured to determine one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers,
wherein the one or more processors are configured to determine a difference between at least one of the stretched physical speaker positions relative to the position of the one of the plurality of virtual speakers.
23. The device of claim 15, wherein the one or more processors are further configured to determine one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers,
determine a difference in elevation between at least one of the stretched physical speaker positions and the position of the one of the plurality of virtual speakers; and
project the one of the plurality of virtual speakers to an elevation lower than an original elevation of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
24. The device of claim 15, wherein the one or more processors are further configured to determining one or more stretched physical speaker positions that are different from positions of the corresponding one or more of the plurality of physical speakers,
project the one of the plurality of virtual speakers to an elevation higher than an original elevation of the plurality of virtual speakers when the determined difference in elevation exceeds a threshold value.
25. The device of claim 15, wherein the plurality of virtual speakers are arranged in a spherical geometry.
26. The device of claim 15, wherein the plurality of virtual speakers are arranged in a polyhedron geometry.
27. The device of claim 15, wherein the plurality of physical speakers are arranged in an irregular speaker geometry.
28. The device of claim 15, wherein the plurality of physical speakers are arranged in an irregular speaker geometry on multiple different horizontal planes.
29. The method of claim 1, further comprising outputting the plurality of loudspeaker channel signals to the plurality of physical speakers, the plurality of physical speakers coupled to the one or more processors.
30. The device of claim 15, further comprising the plurality of physical speakers coupled to the one or more processors, and configured to reproduce, based on the plurality of loudspeaker channel signals, the sound field such that the reproduced sound field includes the at least one sound that appears to originate from the adjusted location of the virtual speaker.
US14/174,775 2013-02-07 2014-02-06 Mapping virtual speakers to physical speakers Active 2035-05-24 US9913064B2 (en)
US201361762302P true 2013-02-07 2013-02-07
US201361829832P true 2013-05-31 2013-05-31
US14/174,775 US9913064B2 (en) 2013-02-07 2014-02-06 Mapping virtual speakers to physical speakers
CN201480007510.XA CN104969577B (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
JP2015557126A JP6284955B2 (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
EP14707033.8A EP2954702B1 (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
TW103104152A TWI611706B (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
PCT/US2014/015315 WO2014124268A1 (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
KR1020157023103A KR20150115822A (en) 2013-02-07 2014-02-07 Mapping virtual speakers to physical speakers
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US9913064B2 true US9913064B2 (en) 2018-03-06
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PETERS, NILS GUENTHER;MORRELL, MARTIN JAMES;SIGNING DATES FROM 20140314 TO 20140317;REEL/FRAME:032674/0210