Huawei Technologies Co., Limited

Huawei Technologies Duesseldorf Gmbh

Juergen Geiger

Peter Grosche

Karim Helwani

Kainan Chen

The proposed method for localizing a target sound source from a plurality of sound sources, wherein a multi-channel recording signal of the plurality of sound sources comprises a plurality of microphone channel signals, comprises converting each microphone channel signal into a respective channel spectrogram in a time-frequency domain, blindly separating the channel spectrograms to obtain a plurality of separated source signals, identifying, among the plurality of separated source signals, the separated source signal that best matches a target source model, estimating, based on the identified separated source signal, a binary mask reflecting where the target sound source is active in the channel spectrograms in terms of time and frequency, applying the binary mask on the channel spectrograms to obtain masked channel spectrograms, and localizing the target sound source from the plurality of sound sources based on the masked channel spectrograms.

Localization algorithm for sound sources with known statistics

Example audio signal processing apparatuses and methods for processing an input audio signal into an output audio signal are disclosed. An example audio signal processing apparatus comprises a decomposer configured to decompose the input audio signal into a direct audio signal and a diffuse audio signal, a modifier configured to modify the direct audio signal in order to obtain a modified direct audio signal, wherein the modifier comprises a bandwidth extender configured to extend an upper cutoff frequency of a frequency range of the direct audio signal, and a combiner configured to combine the modified direct audio signal with the diffuse audio signal to obtain the output audio signal.

Audio signal processing apparatus and method for processing an input audio signal

A signal processing apparatus for enhancing a voice component within a multi-channel audio signal comprising a left channel audio signal, a center channel audio signal, and a right channel audio signal, the signal processing apparatus comprising a filter and a combiner; wherein the filter is configured to determine an overall magnitude of the multi-channel audio signal over frequency based on the multi-channel audio signal, to obtain a gain function based on a ratio between a magnitude of the center channel audio signal and the overall magnitude of the multi-channel audio signal, and to weight the left channel audio signal, the center channel audio signal, and the right channel audio signal by the gain function; and wherein the combiner is configured to combine individually the left channel audio signal, the center channel audio signal, and the right channel audio signal with the weighted right channel audio signal.

Signal processing apparatus for enhancing a voice component within a multi-channel audio signal

The disclosure relates to an audio signal processing apparatus for modifying a stereo image of a stereo signal. The apparatus includes a panning index modifier configured to apply a mapping function to at least all panning indexes of stereo signal time-frequency segments that are within a frequency bandwidth, a first panning gain determiner configured to determine modified panning gains for time-frequency signal segments of the first and second audio signal based on the modified panning indexes, and a re-panner configured to re-pan the stereo signal according to ratios between the modified panning gains and panning gains of the first and second audio signal that correspond to the modified panning gains in time and frequency.

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Munich, Germany

Juergen Geiger