A voice receiving device configured for accurate listening includes a microphone array, a camera, a capturing module, a determining module, a time module, a calculating module, and a de-noising module. The microphone array captures a first voice signal and a second voice signal and the camera captures mouth pictures of a user. The determining module determines whether the first voice signal is synchronized with the mouth pictures, and if so compares the first voice signal to a model preset voice signal of a user to determine a target voice signal. The time module obtains time delay difference between one voice reaching different microphones. The calculating module calculates a position of sound source of the target voice signal. According to the position of the sound source, the de-noising module de-noises by reference to the second voice signal. The disclosure further provides a voice receiving method.

An audio signal decoder for providing a decoded audio signal representation on the basis of an encoded audio signal representation has a decoder preprocessing stage for obtaining a plurality of frequency band signals from the encoded audio signal representation, a clipping estimator, a level shifter, a frequency-to-time-domain converter, and a level shift compensator. The clipping estimator analyzes the encoded audio signal representation and/or side information relative to a gain of the frequency band signals in order to determine a current level shift factor. The level shifter shifts levels of the frequency band signals according to the level shift factor. The frequency-to-time-domain converter converts the level shifted frequency band signals into a time-domain representation. The level shift compensator acts on the time-domain representation for at least partly compensating a corresponding level shift and for obtaining a substantially compensated time-domain representation.

An audio signal decoder for providing a decoded audio signal representation on the basis of an encoded audio signal representation has a decoder preprocessing stage for obtaining a plurality of frequency band signals from the encoded audio signal representation, a clipping estimator, a level shifter, a frequency-to-time-domain converter, and a level shift compensator. The clipping estimator analyzes the encoded audio signal representation and/or side information relative to a gain of the frequency band signals in order to determine a current level shift factor. The level shifter shifts levels of the frequency band signals according to the level shift factor. The frequency-to-time-domain converter converts the level shifted frequency band signals into a time-domain representation. The level shift compensator acts on the time-domain representation for at least partly compensating a corresponding level shift and for obtaining a substantially compensated time-domain representation.

Systems, methods, and computer program product embodiments are disclosed for removing any fixed frequency interfering signal from an input signal without introducing artifacts that are not part of the original signal of interest. An embodiment operates by using a virtual buffer with a length that matches a length of one cycle of an interfering signal. The embodiment extracts the interfering signal into the virtual buffer. For a sample in the next cycle of the interfering signal that corresponds to a virtual memory location for the virtual buffer, the embodiment can update one or more physical memory locations of the virtual buffer that are in the vicinity of the virtual memory location. This use of virtual buffer can remove any interfering signal without creating the artifacts associated with conventional notch filters.

A mating assurance system includes first and second microphones configured to be located in a vicinity of a mating zone for electrical connectors. The first microphone is located a first distance from the mating zone and the second microphone being located a second distance from the mating zone. The first and second microphones are configured to detect audible sound when the electrical connectors are mated. An output unit is connected to the first and second microphones and receives audio signals from the first and second microphones. The output unit processes the audio signals from the first microphone and from the second microphone for mating assurance.

A mating assurance system includes first and second microphones configured to be located in a vicinity of a mating zone for electrical connectors. The first microphone is located a first distance from the mating zone and the second microphone being located a second distance from the mating zone. The first and second microphones are configured to detect audible sound when the electrical connectors are mated. An output unit is connected to the first and second microphones and receives audio signals from the first and second microphones. The output unit processes the audio signals from the first microphone and from the second microphone for mating assurance.

A method for determining a deep filter has the following steps: receiving a mixture; estimating using a deep neural network the deep filter, wherein the estimating is performed, such that the deep filter, when applying to elements of the mixture, obtains estimates of respective elements of the desired representation; wherein the deep filter of at least one dimension includes a tensor with elements.

A method for determining a deep filter has the following steps: receiving a mixture; estimating using a deep neural network the deep filter, wherein the estimating is performed, such that the deep filter, when applying to elements of the mixture, obtains estimates of respective elements of the desired representation; wherein the deep filter of at least one dimension includes a tensor with elements.

From a mixed signal in which a first signal and a second signal are mixed, the second signal is removed at low processing cost and without delay. As a result, an estimated first signal which has low residue of the second signal and low distortion is obtained. An estimated first signal is generated by subtracting a pseudo second signal which is estimated to be mixed in a first mixed signal in which a first signal and a second signal are mixed from the first mixed signal. The pseudo second signal is obtained by a first adaptive filter using a second mixed signal in which the first signal and the second signal are mixed in a different proportion from the first mixed signal. A coefficient update amount of the first adaptive filter is made smaller as compared with a case when the estimated first signal is smaller than the first mixed signal, in case the estimated first signal is larger than the first mixed signal.

A wideband signal is enhanced or suppressed to the same extent at each frequency without increasing the size of an overall sensor array. To achieve this, there is provided a signal processing apparatus including a direction estimator that obtains a direction of arrival of a signal for signals received from a plurality of sensors and each containing a target signal and noise, a first gain calculator that calculates a first gain using the direction of arrival of the signal, an integrator that obtains an integrated signal by integrating the signals received from the plurality of sensors, and a multiplier that multiplies the first gain by the integrated signal.