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It is still a challenging research area to deal with the early reflection blindly.
The joint dictionary used for NMF learned pairs of exemplars with and without the early reflection effect, and thus it can map a signal that contains the early reflection effect, i.e., the signal processed by NMFD, to the one without the early reflection effect.
In their algorithm, they first applied NMFD to remove the late reverberation components, which were caused by the signals from the past frames, and subsequent joint-dictionary-based NMF removed the early reflection effect.
A perception-based simplification algorithm is presented for the selection of the early reflections using a criterion which depends both on the arrival time and on the angle of incidence of the early reflection with respect to the listener.
Similar(56)
John explained that there are two components to a sound as it resonates: the early reflections, which contain most of the intelligible information; and the later reverberation, which is blurrier.
The results also clarified that reforming the ceiling eliminated the shadow and increased the early reflections.
Our hypothesis in deriving the non-causal model was that the early reflections part still has considerable amount of energy.
The advantage of PMINT lies in its control of the early reflections in the EIR, hence better preserving the perceptual speech quality of the output signal.
The experimental results demonstrate that the single-channel filter can reduce the early reflections from a downfiring loudspeaker by a considerable amount.
Design of computationally efficient yet perceptually realistic room auralisation algorithms require a careful selection of the early reflections to be auralised.
In this way, the early reflections associated to the dominant source could be properly handled, reducing their detrimental effects on the localization of the second source.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com