Abstract: A voice processing device includes a noise-originating coefficient calculation section that calculates a noise-originating coefficient that gradually decreases as a target value of stationary noise for each frequency increases, the target value being calculated based on an amplitude value of a frequency spectrum obtained by time-frequency transforming a voice signal for a predetermined period of time, and a suppression signal generation section that generates, when the frequency spectrum is determined as being stationary on the basis of the amplitude value, a suppression signal by multiplying a suppression coefficient based on the noise-originating coefficient by the amplitude value, the suppression signal being frequency-time transformed to be output.

Abstract: A noise suppression apparatus includes: a conversion unit to convert a recorded sound signal in a time domain into a spectrum in a frequency domain; a setting unit to set a suppression gain indicating a degree of suppression on each spectrum for each frequency spectrum on the basis of a nonstationarity-value variation in time of the respective spectrum; a suppression unit to suppress each of the spectrum on the basis of the suppression gain set by the setting unit for each frequency spectrum; and an inverse conversion unit to perform an inverse conversion to the conversion by the conversion unit on the spectrum having been subjected to the suppression processing by the suppression unit.

Abstract: A computer implemented method comprising: setting a plurality of frames on a time axis between a first waveform of an input to audio processing and a second waveform of an output from the audio processing, detecting a voice frame and a noise frame in the first and second waveform, calculating a first and second spectrum from the first and second waveform, adjusting level of the first or second spectrum of the noise frame, setting the adjusted first and second spectrum of the noise frame as a third and fourth spectrum, calculating a distortion amount of the noise frame from the third and fourth spectrum, estimating a noise model spectrum from the first or second spectrum, determining a selected frequency by comparison of voice and noise frame spectrum levels, and calculating a distortion amount of the voice frame from the first and second spectrum of the voice frame at the selected frequency.

Abstract: A voice processing apparatus calculates a phase difference between first and second frequency signals obtained by transforming first and second voice signals generated by two voice input units for each frequency, calculates, for each extension range set outside or inside a reference range, a presence ratio based on the number of frequencies with the phase difference between the first and second frequency signals falling within the extension range, the reference range representing a range of the phase difference between the first and second voice signals for each frequency and corresponding to a direction in which a target sound source is assumed to be located, and sets, as a non-suppression range, a first extension range having the presence ratio higher than a predetermined value and a second extension range closer to the phase difference at the center of the reference range than the first extension range is within the reference range.

Abstract: A voice processing apparatus includes: a phase difference calculation unit which calculates for each frequency band a phase difference between first and second frequency signals obtained by applying a time-frequency transform to sounds captured by two voice input units; a detection unit which detects a frequency band for which the percentage of the phase difference falling within a first range that the phase difference can take for a specific sound source direction, the percentage being taken over a predetermined number of frames, does not satisfy a condition corresponding to a sound coming from the direction; a range setting unit which sets, for the detected frequency band, a second range by expanding the first range; and a signal correction unit which makes the amplitude of the first and second frequency signals larger when the phase difference falls within the second range than when the phase difference falls outside the second range.

Abstract: A microphone sensitivity difference correction device includes a detection section that detects a frequency domain signal expressing a stationary noise, based on frequency domain signals of input sound signals respectively input from plural microphones; a first correction section that employs the stationary noise to compute a first correction coefficient for correcting the sensitivity difference between the plural microphones by a frame unit; and a second correction section that employs the frequency domain signals that have been corrected by the first correction section to compute a second correction coefficient for correcting by frequency unit the sensitivity difference between the plural microphones for each of the frames.

Abstract: A noise suppression device includes a phase difference derived suppression coefficient computation section that over a phase difference utilization range computes for each frequency a phase difference derived suppression coefficient based on a phase difference, an amplitude ratio derived suppression coefficient computation section that computes for each frequency an amplitude ratio derived suppression coefficient based on an amplitude ratio or an amplitude difference, and based on the amplitude conditions, and a suppression section that suppresses noise contained in the input sound signals based on a suppression coefficient determined by using the phase difference derived suppression coefficient and the amplitude ratio derived suppression coefficient.

Abstract: A pulse rate counting device includes: a short-term average value calculation unit for calculating an average interval of predetermined previous pulses; a fluctuation amount calculation device for calculating the amount of fluctuation on the basis of the difference between the average interval and an actual pulse wave interval; a search range determination unit for calculating the width of the search range, calculating an amount of displacement on the basis of a time change of the average interval, and determining as a search range a range including an appearance prediction value of the next detection point calculated from the average interval and indicated by the width of the search range from a starting point determined on the basis of the amount of displacement; and a pulse wave interval detection unit for detecting the detection point in the determined search range, and outputting a pulse wave interval.

Abstract: An erroneous detection determination device includes: a signal acquisition unit configured to acquire, from each of microphones, a plurality of audio signals relating to ambient sound including sound from a sound source in a certain direction; a result acquisition unit configured to acquire a recognition result including voice activity information indicating the inclusion of a voice activity relating to at least one of the audio signals; a calculation unit configured to calculate, for each of audio signals on the basis of the signals in respective unit times and the certain direction, a speech arrival rate representing the proportion of the sound from the certain direction to the ambient sound in each of the unit times; and an error detection unit configured to determine, on the basis of the recognition result and the speech arrival rate, whether or not the voice activity information is the result of erroneous detection.

Abstract: From pulse wave data obtained from change in a blood flow, an average interval of a prescribed number of immediately preceding pulses or pulses in an immediately preceding prescribed time period is calculated. Next, an average-calculation range is determined on the basis of at least one of an amount of fluctuation and an evaluation result. The amount of fluctuation is a value calculated on the basis of a difference between the average interval and an interval of a pulse wave newly detected from the pulse wave data. The evaluation result is a result of evaluating the interval of the newly detected pulse wave by at least one evaluation factor. Thereafter, an average pulse wave interval value is calculated by averaging pulse wave intervals on the basis of the average-calculation range, and a pulse rate is calculated on the basis of the average pulse wave interval value.

Abstract: A speech signal evaluation apparatus includes: an acquisition unit that acquires, as a first frame, a speech signal of a specified length from speech signals; a first detection unit that detects, on the basis of a speech condition, whether the first frame is voiced or unvoiced; a variation calculation unit that, when the first frame is unvoiced, calculates a variation in a spectrum associated with the first frame on the basis of a spectrum of the first frame and a spectrum of a second frame that is unvoiced and precedes the first frame in time; and a second detection unit that detects, on the basis of a non-stationary condition based on the variation in spectrum, whether the variation of the first frame satisfies the non-stationary condition.

Abstract: When there are missing voice-transmission-signals, a repetition-section calculating unit sets a plurality of repetition sections of different lengths that are determined to be similar to the voice-transmission-signals preceding the missing voice-transmission-signal, the repetition sections being determined with respect to stationary voice-transmission-signals stored in a normal signal storage unit, the stationary voice-transmission-signals being selected from the previously input voice-transmission-signals. A controller generates a concealment signal using the repetition sections.

Abstract: A semiconductor device includes rectifying elements which are connected in series and has a rectifying function from a first input terminal portion to an output terminal portion; a first wiring and a second wiring, which are connected to a second input terminal portion; and a boosting circuit including a plurality of capacitor elements each having a first electrode, an insulating film, and a second electrode and storing a boosted potential. The plurality of capacitor elements includes a capacitor element in which the first electrode and the second electrode are formed using conductive films, and a capacitor element in which at least the second electrode is formed using a semiconductor film. In the plurality of capacitor elements, at least a capacitor element in a first stage is a capacitor element in which the first electrode and the second electrode are formed using conductive films.

Abstract: An erroneous detection determination device includes: a signal acquisition unit configured to acquire, from each of microphones, a plurality of audio signals relating to ambient sound including sound from a sound source in a certain direction; a result acquisition unit configured to acquire a recognition result including voice activity information indicating the inclusion of a voice activity relating to at least one of the audio signals; a calculation unit configured to calculate, for each of audio signals on the basis of the signals in respective unit times and the certain direction, a speech arrival rate representing the proportion of the sound from the certain direction to the ambient sound in each of the unit times; and an error detection unit configured to determine, on the basis of the recognition result and the speech arrival rate, whether or not the voice activity information is the result of erroneous detection.

Abstract: A noise suppression apparatus includes: a conversion unit to convert a recorded sound signal in a time domain into a spectrum in a frequency domain; a setting unit to set a suppression gain indicating a degree of suppression on each spectrum for each frequency spectrum on the basis of a nonstationarity-value variation in time of the respective spectrum; a suppression unit to suppress each of the spectrum on the basis of the suppression gain set by the setting unit for each frequency spectrum; and an inverse conversion unit to perform an inverse conversion to the conversion by the conversion unit on the spectrum having been subjected to the suppression processing by the suppression unit.

Abstract: To automatically detect and automatically correct in a reproduced speech, defective portions related to plosives such as existence or absence of plosive portions, phoneme lengths of aspirated portions that continue after the plosive portions or defective portions related to amplitude variations of fricatives. Speech wherein consonants and unvoiced vowels are unclear and discordant is input into a speech enhancement apparatus according to the present invention. In the speech enhancement apparatus, the speech is split into phonemes and each phoneme is classified into any one of an unvoiced plosive, a voiced plosive, an unvoiced fricative, a voiced fricative, an affricate, and an unvoiced vowel. Each phoneme is corrected according to a determination of necessity of correction of each phoneme to obtain an output of the speech wherein the consonants and the unvoiced vowels are clear and not discordant.

Abstract: A semiconductor device includes rectifying elements which are connected in series and has a rectifying function from a first input terminal portion to an output terminal portion; a first wiring and a second wiring, which are connected to a second input terminal portion; and a boosting circuit including a plurality of capacitor elements each having a first electrode, an insulating film, and a second electrode and storing a boosted potential. The plurality of capacitor elements includes a capacitor element in which the first electrode and the second electrode are formed using conductive films, and a capacitor element in which at least the second electrode is formed using a semiconductor film. In the plurality of capacitor elements, at least a capacitor element in a first stage is a capacitor element in which the first electrode and the second electrode are formed using conductive films.

Abstract: The present invention relates to a technology capable of providing a hearer with an easy-to-hear synthetic speech to the hearer. The speech synthesizer includes an input unit receiving an input of a sentence, a generation unit generating synthetic speech data from the sentence inputted to the input unit, an accumulation unit accumulating the sentence inputted to the input unit, a collation unit acquiring, when a sentence is newly inputted to the input unit, a collation target sentence that should be collated with this new sentence from the accumulation unit, and calculating a variation degree of the new sentence from the collation target sentence through the collation between the new sentence and the collation target sentence, a calculation unit calculating a variation coefficient corresponding to the variation degree, and a correction unit correcting the synthetic speech data with the variation coefficient.

Abstract: To easily detect in a semiconductor device whether a voltage within the specifications of the semiconductor device is obtained. The semiconductor device includes a detecting circuit that detects an output voltage of an inner circuit of the semiconductor device and judges whether the output voltage is within or out of the specifications of the semiconductor device. A signal for determining whether an output voltage is within or out of the specifications is transmitted from the detecting circuit to a digital circuit, and the digital circuit performs or stops circuit operation in accordance with the signal.

Abstract: To provide a semiconductor device of which a manufacturing process is simplified and which has a boosting circuit in which the area of a capacitor element is reduced. The present invention includes a plurality of rectifying elements which is connected in series and has a rectifying function from a first input terminal portion to an output terminal portion; a first wiring and a second wiring, which are connected to a second input terminal portion, into which a signal and a signal obtained by inverting the signal are respectively input; and a boosting circuit including a plurality of capacitor elements each having a first electrode, an insulating film, and a second electrode and storing a boosted potential. The plurality of capacitor elements includes a capacitor element in which the first electrode and the second electrode are formed using conductive films, and a capacitor element in which at least the second electrode is formed using a semiconductor film.