US 12,284,510 B2
Method for generating stereophonic sound
Masahito Tobisawa, Tokyo (JP)
Assigned to NEXT SOUND INC., (JP)
Appl. No. 18/016,840
Filed by NEXT SOUND INC., Tokyo (JP)
PCT Filed Aug. 5, 2021, PCT No. PCT/JP2021/029146
§ 371(c)(1), (2) Date Jan. 18, 2023,
PCT Pub. No. WO2022/030587, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-135188 (JP), filed on Aug. 7, 2020.
Prior Publication US 2023/0276191 A1, Aug. 31, 2023
Int. Cl. H04S 7/00 (2006.01); G10K 15/02 (2006.01); H04S 1/00 (2006.01)
CPC H04S 7/307 (2013.01) [G10K 15/02 (2013.01); H04S 1/007 (2013.01); H04S 2420/01 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for generating a stereophonic sound by performing phase delay control, the method comprising:
a step of obtaining an acoustic signal having a base note on a right ear side and an acoustic signal having a base note on a left ear side; and
a step of determining to control a phase of either one of the acoustic signal obtained on the right ear side and having a note or the acoustic signal obtained on the left ear side and having a note, wherein
the acoustic signal having the base note to be delayed is further subjected to
a step of generating an acoustic signal that is derived from a frequency of the acoustic signal having the base note and that has a first phase shift generated by performing a first phase delay process on the acoustic signal having the base note,
a step of generating an acoustic signal that is derived from the acoustic signal having the base note and that has a second phase shift generated by performing a second phase delay process on the acoustic signal having the base note,
a step of generating an acoustic signal that is derived from a frequency of an acoustic signal having a note a perfect fourth above the base note and that has a third phase shift generated by performing a third phase delay process on the acoustic signal having the base note,
a step of generating an acoustic signal that is derived from the frequency of the acoustic signal having the note the perfect fourth above the base note, and that has a fourth phase shift generated by performing a fourth phase delay process on the acoustic signal having the base note, and
a step of synthesizing the acoustic signal obtained and having the base note, the acoustic signal having the first phase shift, the acoustic signal having the second phase shift, the acoustic signal having the third phase shift, and the acoustic signal having the fourth phase shift.