Abstract: Compensation accuracy is increased with respect to clip compensation in a case where signals from a plurality of microphones are subjected to an echo cancellation process. A signal processing device according to an embodiment of the present technology includes an echo cancellation unit that performs an echo cancellation process of canceling an output signal component from a speaker on signals from a plurality of microphones, a clip detection unit that performs a clip detection for signals from the plurality of microphones, and a clip compensation unit that compensates for a signal after the echo cancellation process of clipped one of the microphones on the basis of a signal of non-clipped one of the microphones.

Abstract: An information processing apparatus including an acquisition section that acquires acquire an acoustic signal indicating a sound collection result of a sound collection device group and a control section that calculates a first weight in accordance with a degree to which the acoustic signal acquired by the acquisition section is a signal obtained by observing stationary noise and to apply the first weight to a noise spatial correlation matrix that is a spatial correlation matrix obtained from a noise signal.

Abstract: The present technology relates to a voice input device and method that facilitate estimation of an utterance direction. The voice input device includes a fixed part disposed at a predetermined position, a movable part movable with respect to the fixed part, a microphone array attached to the fixed part, an utterance direction estimation unit that estimates an utterance direction on the basis of a voice from an utterer that is input from the microphone array, and a driving unit that drive the movable part according to the estimated utterance direction. The voice input device can be used by installation in, for example, a smart speaker, a voice agent, a robot, and the like.

Abstract: It is desirable to provide an echo cancellation technique that enables an environmental change to be flexibly addressed. Provided is a signal processing apparatus including: an echo cancellation unit that learns an estimated transfer characteristic in a space through which a signal reproduced by a speaker is input to a microphone, and performs echo cancellation on the basis of the estimated transfer characteristic learned; and an environmental change detection unit that detects an environmental change, in which the echo cancellation unit learns the estimated transfer characteristic by causing the speaker to reproduce a sound for learning on the basis of detection of the environmental change.

Abstract: [Object] To provide a mechanism for evaluating the appropriateness of an employed noise segment. [Solution] An information processing apparatus including: an acquisition section configured to acquire an acoustic signal indicating a sound collection result of a sound collection device group; and a control section configured to calculate a first weight in accordance with a degree to which the acoustic signal acquired by the acquisition section is a signal obtained by observing stationary noise and to apply the first weight to a noise spatial correlation matrix that is a spatial correlation matrix obtained from a noise signal.

Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

Abstract: It is desirable to provide an echo cancellation technique that enables an environmental change to be flexibly addressed. Provided is a signal processing apparatus including: an echo cancellation unit that learns an estimated transfer characteristic in a space through which a signal reproduced by a speaker is input to a microphone, and performs echo cancellation on the basis of the estimated transfer characteristic learned; and an environmental change detection unit that detects an environmental change, in which the echo cancellation unit learns the estimated transfer characteristic by causing the speaker to reproduce a sound for learning on the basis of detection of the environmental change.

Abstract: Compensation accuracy is increased with respect to clip compensation in a case where signals from a plurality of microphones are subjected to an echo cancellation process. A signal processing device according to an embodiment of the present technology includes an echo cancellation unit that performs an echo cancellation process of canceling an output signal component from a speaker on signals from a plurality of microphones, a clip detection unit that performs a clip detection for signals from the plurality of microphones, and a clip compensation unit that compensates for a signal after the echo cancellation process of clipped one of the microphones on the basis of a signal of non-clipped one of the microphones.

Abstract: The present technology relates to a signal processing apparatus, a signal processing method, and a program capable of improving determination accuracy of a direct sound direction. The signal processing apparatus includes a direction estimation unit that detects a sound section from a sound signal, and estimates a coming direction of a sound contained in the sound section, and a determination unit that determines which of sounds in a plurality of the coming directions is a sound arriving earlier in a case where the plurality of coming directions is obtained for the sound section by the estimation. The present technology is applicable to a signal processing apparatus.

Abstract: The present technology relates to a sound source direction estimation device and method, and a program that can reduce an operation amount for estimating a direction of a target sound source. A first estimation unit estimates a first horizontal angle that is a horizontal angle of a sound source direction from an input acoustic signal. A second estimation unit estimates a second horizontal angle that is the horizontal angle of the sound source direction and an elevation angle, with respect to the first horizontal angle, in a predetermined range near the first horizontal angle. The present technology can be applied, in a case where a voice is uttered from a surrounding sound source (for example, a person), to a device having a function of estimating the direction in which the voice is uttered.

Abstract: The present technology relates to a voice input device and method, and a program that facilitate estimation of an utterance direction The voice input device includes: a fixed part disposed at a predetermined position; a movable part movable with respect to the fixed part; a microphone array attached to the fixed part; an utterance direction estimation unit configured to estimate an utterance direction on the basis of a voice from an utterer that is input from the microphone array; and a driving unit configured to drive the movable part according to the estimated utterance direction. The voice input device can be used by installation in, for example, a smart speaker, a voice agent, a robot, and the like.

Abstract: It is desirable that a technique capable of more appropriately determining a request to be preferentially processed is provided. There is provided an information processing apparatus including a detection unit that detects a context associated with a user, and a request processing unit that determines, on the basis of the context, which of a first request and a second request should be preferentially processed.

Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

Abstract: A sound processing apparatus includes a sound determination portion operable to determine whether an input sound includes a first sound emitted from a particular source based on location information of the source, a sound separation portion operable to separate the input sound into the first sound and a second sound emitted from a source different from the particular source if the sound determination portion determines that the input sound includes the first sound, and a sound mixing portion operable to mix the first sound and the second sound separated by the sound separation portion at a prescribed volume ratio.

Abstract: An information processing apparatus for reproducing second content in synchronization with reproduction of first content by a second information processing apparatus different from the information processing apparatus, the first content comprising audio content. The information processing apparatus comprising circuitry configured to: extract a first feature from the audio content; obtain a second feature of the audio content, the second feature being together with the second content; compare the first feature with the second feature; and generate, based on results of the comparing, synchronization information used for reproducing the second content in synchronization with the first content.

Abstract: Provided is a signal processing apparatus including a first periodicity detecting section detecting periodicity information of an acoustic signal included in a first content, as first periodicity information, a second periodicity detecting section detecting the periodicity information of an acoustic signal included in a second content, as second periodicity information, a similarity calculating section calculating a similarity between the first periodicity information detected by the first periodicity detecting section and the second periodicity information detected by the second periodicity detecting section, and a synchronization information generating section generating synchronization information used at a time of synchronizing the first content and the second content, based on the similarity calculated by the similarity calculating section.

Abstract: It is possible to mark karaoke using commercial musical content. A first pitch feature amount is calculated for each predetermined time interval from a music acoustic signal. A second pitch feature amount is calculated from a target comparison acoustic signal, such as a singing voice signal, for every time interval corresponding to the specified time interval. A similarity between acoustic signals is calculated by comparison of the first pitch feature amount and the second pitch feature amount. The pitch feature of the musical composition audio calculated from the music acoustic signal is set as model data. For example, it is possible to mark karaoke using commercial music content provided on a CD or the like.

Abstract: An audio processing apparatus includes an audio signal acquisition unit which acquires an audio signal of a musical piece, a feature value extraction unit which extracts a predetermined type of feature value from the audio signal acquired by the audio signal acquisition unit in time series, a change point detection unit which detects a change point in which the amount of change of the feature value extracted in time series by the feature value extraction unit is changed to be greater than a predetermined threshold value, a hook analysis unit which analyzes a hook place of the audio signal based on the feature value extracted by the feature value extraction unit in block units with the change point detected by the change point detection unit as a boundary, and a hook information output unit which outputs the hook place analyzed by the hook analysis unit as hook information.