Abstract: A fuel cell vehicle includes a fuel tank, a first detector, a control circuit, and a transmitter. The fuel tank stores fuel gas. The first detector detects information on a state in the fuel tank. The control circuit is configured to receive the information and to generate a signal based on the information. The transmitter includes a transmitter circuit and a response data transmitter circuit. The transmitter circuit is configured to transmit the information to a fuel supply station outside of the fuel cell vehicle according to the signal output from the control circuit. The response data transmitter circuit is configured to transmit response data corresponding to the signal. The control circuit includes a response data receiver circuit to acquire the response data transmitted from the response data transmitter circuit.

Abstract: A speech processing device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: obtaining input speech, detecting a vowel segment contained in the input speech, estimating an accent segment contained in the input speech, calculating a first vowel segment length containing the accent segment and a second vowel segment length excluding the accent segment, and controlling at least one of the first vowel segment length and the second vowel segment length.

Abstract: An orthogonal transform apparatus includes: an interchanging unit which interchanges MDCT coefficients contained in a first half of a prescribed interval with MDCT coefficients contained in a second half thereof; an inverting unit which inverts the sign of the MDCT coefficients contained in the second half of the prescribed interval after the interchange; an inverse cosine transform unit which computes the real components of QMF coefficients by applying an IMDCT using FFT to the MDCT coefficients contained in the first half and the sign-inverted MDCT coefficients contained in the second half; an inverse sine transform unit which computes the imaginary components of the QMF coefficients by applying an IMDST using FFT to the MDCT coefficients contained in the first half and the sign-inverted MDCT coefficients contained in the second half; and a coefficient adjusting unit which computes the QMF coefficients by combining the real components with the imaginary components.

Abstract: An apnea episode determination device includes, a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, detecting a breathing segment and a midway segment from a sound signal during sleep, the breathing segment being considered to include a breathing sound, the midway segment existing in between the breathing segments; calculating an acoustic feature based on a background noise component and a signal component excluding the background noise component, which are included in the midway segment; and determining that the midway segment is an apnea episode when the acoustic feature meets a preset condition.

Abstract: An audio encoding device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: detecting a plurality of lobes based on a frequency signal constituting an audio signal; calculating a masking threshold value of the frequency signal; allocating an amount of bits per unit frequency region to be allocated for encoding of the frequency signal on a basis of the masking threshold value; selecting a main lobe on a basis of bandwidth and power of the lobes; and controlling the encoding by reducing the amount of bits in a first region including a maximum value of the power in the main lobe.

Abstract: The eating and drinking action detection apparatus: acquires vibration produced from inside of a body of a subject and generates a vibration signal corresponding to the vibration; divides the vibration signal into each frame to calculate power of the vibration signal for each frame; determines, for each frame, whether the frame is a stationary signal having a periodicity or a non-stationary signal having no periodicity; detects, based on the power of each frame and a determination result for each frame whether the frame is the stationary signal or the non-stationary signal, a period of the non-stationary signal being continued while the power of the vibration signal is equal to or larger than a power threshold, acquires a continuation time of the period; and determines, based on the continuation time, whether the subject performed swallowing or mastication in the period of the non-stationary signal being continued.

Abstract: A voice processing apparatus including a memory, and a processor coupled to the memory and the processor configured to acquire a first input signal containing a first voice, and a second input signal containing a second voice, obtain a first signal intensity of the first input signal, and a second signal intensity of the second input signal, specify a correlation coefficient between a time sequence of the first signal intensity and a time sequence of the second signal intensity, determine whether the first voice and the second voice are in the conversation state or not based on the specified correlation coefficient, and output information indicating an association between the first voice and the second voice when it is determined that the first voice and the second voice are in the conversation state.

Abstract: An image and audio reproduction device obtains an image captured by an image capturing device and a plurality of acoustic signals whose arrival directions are respectively a plurality of locations in an image capturing scope of the image capturing device, and sets, as one group, arrival directions of acoustic signals with a high degree of similarity of amounts of characteristics on the basis of a degree of similarity of the amounts of characteristics between the acoustic signals that are from the arrival directions adjacent to each other. The image and audio reproduction device adds information to the image captured by the image capturing device so as to reproduce the image, the information representing a position of the group in an image capturing scope of the image capturing device.

Abstract: An utterance condition determination device includes a memory configured to a voice signal of a first speaker and a voice signal of a second speaker, and a processor configured to estimate an average backchannel frequency that represents a backchannel frequency of the second speaker in a period of time from a voice start time of the voice signal of the second speaker to a predetermined time based on the voice signal of the first speaker and the voice signal of the second speaker, to calculate the backchannel frequency of the second speaker for each unit of time based on the voice signal of the first speaker and the voice signal of the second speaker, and to determine a satisfaction level of the second speaker based on the estimated average backchannel frequency and the calculated backchannel frequency.

Abstract: An audio coding device includes a memory; and a processor configured to execute a plurality of instructions stored in the memory, the instructions comprising: selecting a main lobe among a plurality of lobes detected from a frequency signal configuring an audio signal on a basis of bandwidth and power of the lobes; and coding the audio signal in such a manner that a first amount of bits per a unit frequency domain allocated to coding of the frequency signal of the main lobe is larger than a second amount of bits per the unit frequency domain allocated to the coding of the frequency signal of a side lobe as a lobe other than the main lobe.

Abstract: A content reproduction device including: a sound acquisition unit that acquires a first sound around an user; an reaction detection unit that detects an reaction of the user; a within-period reaction determination unit that determines that there is a within-period reaction in a case in which the reaction is detected within a predetermined period from an acquisition time point of the first sound based on a temporal relation between the first sound and the detected reaction; and a reproduction control unit that performs control such that reproduction of content is restricted or performs control such that a part of the content reproduced within a period in which the detection of the reaction within the predetermined period continues is reproduced again after the period in the case in which the within-period reaction determination unit determines that there is the within-period reaction.

Abstract: A voice processing device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, causing the processor to execute: acquiring an input voice; detecting a sound period included in the input voice and a silent period adjacent to a back end of the sound period; calculating a number of words included in the sound period; and controlling a length of the silent period according to the number of words.

Abstract: An audio signal encoding apparatus includes a processor to quantize an audio signal, to obtain a characteristic of reverberation masking that is exerted on a sound represented by the audio signal by reverberation of the sound generated in a reproduction environment by reproducing the sound, and to control a quantization step size of the audio signal that quantized based on the characteristic of the reverberation masking.

Abstract: An audio processing device includes a setting section that sets a reproduction sampling frequency Fplay and a recording sampling frequency Frec higher than Fplay, a digital-to-analog converter that based on Fplay converts a sound source signal that is a digital signal into a reproduction signal that is an analog signal, an analog-to-digital converter that based on Frec converts a recording signal that is an analog signal converter into an input signal that is a digital signal, a signal separator that separates the input signal into a low region signal contained in a band of less than Fplay and a high region signal contained in a band of the Fplay and higher, and a breakup detector that detects whether or not breakup is occurring in the reproduced sound based on power of the high region signal.

Abstract: An audio processing device includes a reverb property estimating unit that estimates a reverb property at each frequency on the basis of a first audio signal and a second audio signal representing sounds of the first audio signal output by an audio output unit and collected by an audio input unit, a gain calculating unit that determines an attenuating ratio for a component of the first audio signal at each frequency such that the larger the reverb property at the frequency is, the larger the attenuating ratio for the component at the frequency becomes, and a correcting unit that attenuates the first audio signal at the each frequency in accordance with the attenuating ratio determined for each frequency.

Abstract: A voice processing device includes: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: detecting a first utterance section included in a first voice and a second utterance section included in a second voice; specifying an overlapping section within which the first utterance section and the second utterance section overlap with each other; calculating a first utterance continuation section from a start point of the overlapping section to an end point of the first utterance section; and evaluating an impression regarding the first voice at least on the basis of information relating to a length of the first utterance continuation section.

Abstract: A voice processing device includes: a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, receiving a first signal including a plurality of voice segments; controlling such that a non-voice segment with a length equal to or greater than a predetermined first threshold value exists between at least one of the plurality of voice segments; and outputting a second signal including the plurality of voice segments and the controlled non-voice segment.

Abstract: A voice control device includes a calculation section configured to calculate a response time representing a time difference between a voice in a received signal and a voice in a sending signal; a hearing estimate section configured to estimate hearing of a user based on the calculated response time; and a voice control section configured to control the received signal by a compensation quantity responsive to the estimated hearing.

Abstract: An audio encoding device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: detecting a plurality of lobes based on a frequency signal constituting an audio signal; calculating a masking threshold value of the frequency signal; allocating an amount of bits per unit frequency region to be allocated for encoding of the frequency signal on a basis of the masking threshold value; selecting a main lobe on a basis of bandwidth and power of the lobes; and controlling the encoding by reducing the amount of bits in a first region including a maximum value of the power in the main lobe.

Abstract: A signal processing apparatus generates a window signal, transforms the window signal into a frequency spectrum, and adjusts an amplitude component of the frequency spectrum. Then, the signal processing apparatus applies inverse transform to the amplitude component after adjustment and to a phase component of the frequency spectrum to generate a frame signal, and identifies an overlap segment such that the absolute value of the amplitude of the frame signal at at least one end of the overlap segment becomes smaller than the absolute value of the amplitude of the frame signal at a corresponding end of an overlapping section. Then, in the identified segment, the signal processing apparatus adds and compounds the frame signal corresponding to an immediately preceding frame and the frame signal corresponding to a processing-target frame.