Processing device, processing method, reproducing method, and program
地域：
Yokohama
摘要
An object of the present invention is to provide a processing device, a processing method, a reproducing method, and a program capable of performing appropriate processing.A processing device according to the present embodiment includes: an envelope computation unit computing an envelope for a frequency response of a sound pickup signal; a scale conversion unit generating scale converted data by performing scale conversion and data interpolation on frequency data of the envelope; a normalization factor computation unit dividing the scale converted data into a plurality of frequency bands, obtaining a characteristic value for each frequency band, and computing a normalization factor, based on the characteristic values; and a normalization unit, using the normalization factor, normalizing the sound pickup signal in the time domain.
說明書
This application is a Bypass Continuation of PCT/JP/2019/050601 filed on Dec. 24, 2019, which priority based on Japanese Patent Application No. 2019-24336 filed on Feb. 14, 2019, the disclosure of which is incorporated herein in its entirety by reference.
The present invention relates to a processing device, a processing method, a reproducing method, and a program.
A recording and reproduction system disclosed in Published Japanese Translation of PCT International Publication for Patent Application, No. 10-509565 uses a filter means for processing a signal supplied to a loudspeaker. The filter means includes two filter design steps. In the first step, a transfer function between a position of a virtual sound source and a specific position of a reproduced sound field is described in a form of a filter (A). Note that the specific position of the reproduced sound field is ears or a head region of a listener. Further, in the second step, the transfer function filter (A) is convolved with a matrix of a filter (Hx) for crosstalk canceling that is used to invert an electroacoustic transmission path or path group (C) between input to the loudspeaker and the specific position. The matrix of the filter (Hx) for crosstalk canceling is generated by measuring an impulse response.
權(quán)利要求
What is claimed is: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. 2. The processing device according to claim 1 , wherein the dip correction unit corrects a dip, using a different threshold value for each frequency band. 3. The processing device according to claim 1 , wherein the normalization factor computation unit obtains a plurality of characteristic values with respect to each of the frequency bands and computes the normalization factor by performing weighted addition of the plurality of characteristic values. 4. A processing method comprising:a step of computing an envelope for a frequency response of a sound pickup signal detected by a microphone; a step of generating scale converted data by performing scale conversion and data interpolation on frequency data of the envelope; a step of dividing the scale converted data into a plurality of frequency bands, obtaining a characteristic value for each frequency band, and computing a normalization factor, based on the characteristic values; a step of, using the normalization factor, normalizing the sound pickup signal in a time domain, a step of transforming the normalized sound pickup signal to a frequency domain and compute a normalized frequency response; a step of performing dip correction on the normalized frequency response; a step of generating a filter, using the normalized frequency response subjected to the dip correction; anda step of outputting the filter to an out-of-head localization device which reproduces a reproduction signal on which the out-of-head localization is performed using the filter to headphones or earphones. 5. A reproducing method comprisinga step of performing out-of-head localization on a reproduction signal, using the filter generated by the processing method according to claim 4 . 6. A non-transitory computer readable medium storing program causing a computer to execute a processing method, the processing method comprising:a step of computing an envelope for a frequency response of a sound pickup signal; a step of generating scale converted data by performing scale conversion and data interpolation on frequency data of the envelope; a step of dividing the scale converted data into a plurality of frequency bands, obtaining a characteristic value for each frequency band, and computing a normalization factor, based on the characteristic values; a step of, using the normalization factor, normalizing the sound pickup signal in a time domain, a step of transforming the normalized sound pickup signal to a frequency domain and compute a normalized frequency response; a step of performing dip correction on the normalized frequency response; a step of generating a filter, using the normalized frequency response subjected to the dip correction; and a step of outputting the filter to an out-of-head localization device which outputs signal performed by the out-of-head localization on a reproduction process using the filter to headphones or earphones.
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