Fujitsu Corporation

Chisato Shioda

Masanao Suzuki

Nobuyuki Washio

Takeshi Otani

Taro Togawa

Yoshiteru Tsuchinaga

Yohei Kishi

Shunsuke Takeuchi

Sayuri Kohmura

A non-transitory computer-readable storage medium storing a program that causes a processor included in a computer mounted on a sound source direction estimation device to execute a process, the process includes calculating a sound pressure difference between a first voice data acquired from a first microphone and a second voice data acquired from a second microphone and estimating a sound source direction of the first voice data and the second voice data based on the sound pressure difference, outputting an instruction to execute a voice recognition on the first voice data or the second voice data in a language corresponding to the estimated sound source direction, and controlling a reference for estimating a sound source direction based on the sound pressure difference, based on a time length of the voice data used for the voice recognition based on the instruction and a voice recognition time length.

Storage medium, sound source direction estimation method, and sound source direction estimation device

An utterance detection apparatus includes a processor configured to: detect an utterance start based on a first sound pressure based on first audio data acquired from a first microphone and a second sound pressure based on second audio data acquired from a second microphone; suppress an utterance start direction sound pressure when the utterance start direction sound pressure, which is one of the first sound pressure and the second sound pressure being larger at a time point of detecting the utterance start, falls below a non-utterance start direction sound pressure, which is the other one of the first sound pressure and the second sound pressure being smaller at the time point of detecting the utterance start; and detect an utterance end based on the suppressed utterance start direction sound pressure.

Non-transitory computer-read able storage medium for storing utterance detection program, utterance detection method, and utterance detection apparatus

A sound-source-direction determining apparatus includes a processor that updates a reference threshold such that the reference threshold increases as a sound pressure difference increases, the sound pressure difference being a difference between sound pressure of a certain frequency component of sound acquired by the first microphone and sound pressure of the certain frequency component of the sound acquired by the second microphone when the synthesized sound is output from the speaker and determines a direction in which a sound source of sound is located, based on comparison between the reference threshold and a sound pressure difference between sound pressure of a certain frequency component of the sound acquired by the first microphone and sound pressure of the certain frequency component of the sound acquired by the second microphone when the synthesized sound is not output from the speaker.

Sound-source-direction determining apparatus, sound-source-direction determining method, and storage medium

A method for utterance section detection includes: executing pitch gain calculation processing that includes calculating a pitch gain indicating an intensity of periodicity of an audio signal expressing a voice of a speaker for each of frames that are obtained by dividing the audio signal and that each have a predetermined length; and executing utterance section detection processing that includes determining that an utterance section on the audio signal starts when the pitch gain becomes greater than or equal to a first threshold value after a non-utterance section on the audio signal lasts, wherein the utterance section detection processing further includes determining that the utterance section ends when the pitch gain becomes less than a second threshold value lower than the first threshold value after the utterance section lasts.

Apparatus, method, and non-transitory computer-readable storage medium for storing program for utterance section detection

A device for determining a sound source direction determines a direction in which a source of a reached sound exists, based on at least one of a sound pressure difference between a first sound pressure that is a sound pressure of a first frequency component of a first part of the reached sound acquired by a first microphone and a second sound pressure that is a sound pressure of the first frequency component of a second part of the reached sound acquired by a second microphone, and a phase difference between a first phase that is a phase of a second frequency component of the first part of the reached sound and a second phase that is a phase of the second frequency component of the second part of the reached sound.

Device and method for determining a sound source direction

An apparatus for speech processing: calculates a pitch gain indicating a magnitude of periodicity of an audio signal for each frame, the audio signal representing speaker's voice to be divided into the frames each having a predetermined length; determines that a speech production interval has started, when the pitch gain becomes equal or greater than a first threshold after a non-speech production interval; sets a second threshold that is lower than the first threshold by a reduction amount corresponding to a value acquired by subtracting a second representative value of the pitch gain in an interval preceding the start of the speech production interval from a first representative value of the pitch gain in the speech production interval; and determines that the speech production interval has terminated, when the pitch gain becomes smaller than the second threshold after the speech production interval has started.

Apparatus, method for detecting speech production interval, and non-transitory computer-readable storage medium for storing speech production interval detection computer program

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.

Voice processing device and voice processing method for impression evaluation

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.

Speech processing device and method

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.

Voice processing device and voice processing method for controlling silent period between sound periods

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.

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Kawasaki, Japan

Chisato Shioda