摘要:
The present invention provides a vibration audio system for transmitting an audio signal outputted from a sound source to a listener in the form of vibration while reducing output level of the signal and power consumption. The system includes an envelope detection unit (204) for detecting an envelope signal of the audio signal outputted from a sound source, a vibration transmission member for allowing the listener to perceive vibration of a low-frequency sound outputted from a low-frequency output speaker that outputs audio signals, and a frequency conversion unit (205) for generating an audio signal frequency-converted on the basis of resonant frequencies by multiplying the envelope signal by sine waves having the same frequencies as resonance frequencies obtained from an impulse response of the low-frequency output speaker disposed in the vibration transmission member. The audio signal frequency-converted by the frequency conversion unit (205) is outputted from the low-frequency output speaker.
摘要:
A propagation delay time correction apparatus comprising a means for generating a frequency spectrum signal by performing short-term Fourier transform on an audio signal; a means for setting a propagation delay time for each of a plurality of predetermined frequency bands; a means for calculating a phase control amount for each of the plurality of predetermined frequency bands on a basis of the propagation delay time set for each of the plurality of predetermined frequency bands; a means for generating a phase control signal by smoothing the calculated phase control amount for each of the plurality of predetermined frequency bands; a means for controlling a phase of the frequency spectrum signal for each of the plurality of predetermined frequency bands on a basis of the generated phase control signal; and a means for generating an audio signal on which a propagation delay correction is performed by performing inverse short-term Fourier transform on the frequency spectrum signal of which the phase is controlled for each of the plurality of predetermined frequency bands.
摘要:
Provided is an acoustic signal processing device for producing an output sound meeting listener's preferences by adjusting attack sound, reverberation, and noise component. The device includes: an FFT section for transforming an input audio signal from a time-domain to a frequency-domain to calculate a frequency spectrum signal and for generating a first amplitude spectrum signal and a phase spectrum signal; an attack component controller (10) for controlling an attack component of the first amplitude spectrum signal to generate a second amplitude spectrum signal; a reverberation component controller (20) for controlling a reverberation component of the first amplitude spectrum signal to generate a third amplitude spectrum signal; a first adding section (40) for synthesizing the first amplitude spectrum signal, the second amplitude spectrum signal, and the third amplitude spectrum signal to generate a fourth amplitude spectrum signal; and an IFFT section for generating an audio signal transformed from a frequency domain to a time domain based on the fourth amplitude spectrum signal and the phase spectrum signal generated by the FFT section.
摘要:
There is provided an acoustic processing device capable of applying acoustic processing matching listener's sense to reproduce an audio signal with satisfactory sound quality in terms of auditory sense irrespective of the characteristics of a sound source. The acoustic processing device (1) includes a gain calculation section (5) that calculates a gain correction amount corresponding to predetermined auditory sense characteristics, an offset gain calculation section (6) that calculates a gain offset based on a frequency characteristics of an audio signal analyzed by a frequency analysis section (3), an acoustic signal generation section (7)that generates an acoustic signal based on the gain correction amount and the gain offset, and an acoustic addition section (8) that adds the generated acoustic signal to the audio signal.
摘要:
Attenuation of output levels is suppressed while interference due to a plurality of vibrators is reduced. An acoustic control device 30 performs correction processing of correcting phase delay characteristics including transmission systems from exciters 21L and 21R which are first and second vibrators connected with a rigid body, on acoustic signals SR and SL. Thereafter, the acoustic control device 30 controls the exciters 21L and 21R on the basis of the corrected acoustic signals SL1 and SR1.
摘要:
There is provided a signal processing device, comprising: a frequency detecting means that detects a frequency satisfying a predetermined condition from an audio signal; an offset means that gives an offset to the detected frequency by the frequency detecting means in accordance with a frequency property at the detected frequency or around the detected frequency; a reference signal generating means that generates a reference signal by extracting a signal from the audio signal based on the detected frequency offset by the offset means; an interpolation signal generating means that generates an interpolation signal based on the generated reference signal; and a signal synthesizing means that performs high band interpolation by synthesizing the generated interpolation signal and the audio signal.
摘要:
A phase control signal generation device generating a phase control signal for each of frequency bands for an audio signal converted into a frequency domain, the phase control signal generation device comprising: a setting change means that is able to change setting of a propagation delay time for each of predetermined frequency bands; a difference obtaining means that obtains a difference between propagation delay times before and after setting change; an updating means that updates a phase control amount of the frequency band for which the propagation delay time is changed, based on the obtained difference; and a phase control signal generating means that generates a phase control signal of each frequency band by performing a smoothing process for the phase control amount in a frequency domain using the updated phase control amount.
摘要:
A sound field measuring device (1) includes an external output unit (6) configured to output a measurement signal composed of a periodic function having a code length of 2 n -1 (n is a natural number) to a speaker (9), a microphone (7) configured to pick up the measurement signal outputted from the speaker (9), a Fourier transform unit (12) configured to obtain frequency characteristics by Fourier transforming measurement sound picked up with a sample length of 2 m (m is a natural number), a thinning-out unit (13) configured to remove line spectra except for the (k×2 m-n +1)th line spectra (k=0, 1, 2, and the like) from the obtained frequency characteristics, and an averaging unit (14) configured to obtain averaged frequency characteristics of a sound field on the basis of frequency characteristics thinned-out.
摘要翻译:声场测量装置(1)包括:外部输出单元(6),被配置为向扬声器(9)输出由码长为2 n -1(n为自然数)的周期函数组成的测量信号, 被配置为拾取从扬声器(9)输出的测量信号的麦克风(7);傅立叶变换单元(12),被配置为通过用2m的采样长度拾取的测量声音进行傅立叶变换来获得频率特性(m是 自然数),被配置为从所获得的频率特性除去除了(k×2 mn +1)线谱(k = 0,1,2等)之外的线谱的稀疏单元(13) 以及平均单元(14),被配置为基于稀疏的频率特性来获得声场的平均频率特性。