US 11,997,468 B2
Processing device, processing method, reproducing method, and program
Takahiro Gejo, Yokohama (JP); Hisako Murata, Yokohama (JP); Masaya Konishi, Yokohama (JP); Yumi Fujii, Yokohama (JP); Kuniaki Takachi, Yokohama (JP); and Toshiaki Nagai, Yokohama (JP)
Assigned to JVCKENWOOD CORPORATION, Yokohama (JP)
Filed by JVCKENWOOD Corporation, Yokohama (JP)
Filed on Aug. 12, 2021, as Appl. No. 17/400,672.
Application 17/400,672 is a continuation of application No. PCT/JP2019/050601, filed on Dec. 24, 2019.
Claims priority of application No. 2019-024336 (JP), filed on Feb. 14, 2019.
Prior Publication US 2021/0377684 A1, Dec. 2, 2021
Int. Cl. H04R 5/02 (2006.01); H04R 5/04 (2006.01); H04S 1/00 (2006.01)
CPC H04S 1/005 (2013.01) [H04R 5/02 (2013.01); H04R 5/04 (2013.01); H04S 2400/01 (2013.01); H04S 2420/01 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A processing device comprising:
a processor coupled to a memory storing instructions to permit the processor to function as:
an envelope computation unit configured to compute an envelope for a frequency response of a sound pickup signal detected a microphone;
a scale conversion unit configured to generate scale converted data by performing scale conversion and data interpolation on frequency data of the envelope;
a normalization factor computation unit configured to divide the scale converted data into a plurality of frequency bands, obtain a characteristic value for each frequency band, and compute a normalization factor, based on the characteristic values;
a normalization unit configured to, using the normalization factor, normalize the sound pickup signal in a time domain,
a transform unit configured to transform the normalized sound pickup signal to a frequency domain and compute a normalized frequency response;
a dip correction unit configured to perform dip correction on a power value or an amplitude value of the normalized frequency response; and
a filter generation unit configured to generate a filter, using the normalized frequency response subjected to the dip correction and configured to output the filter to an out-of-head localization device which reproduces a reproduction signal on which an out-of-head localization is performed using the filter to headphones or earphones.