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One of the key problems for hearing impaired persons represents the cocktail party scenario, in which a bilateral conversation is surrounded by other speakers and noise sources. State-of-the-art beamforming techniques are able to segregate specific sound sources from the environment, presupposing the position of the speaker. The speaker position can be estimated in the frontal azimuth-plane with a...
A method for the estimation of the direct-to-reverberant-ratio (DRR) from dual-channel microphone recordings without having knowledge of the source signal is proposed. The method is based on previous findings for the statistics of the room transfer function spectral standard deviation and its relationship to the DRR. A novel relationship for the standard deviation of the difference of the magnitude...
In this paper, methods for improved parametric coding of transients are presented. We propose a signal model for coding of transients consisting of a sum of sinusoids each being amplitude-modulated by a different gamma envelope. These envelopes are characterized by an onset time, an attack and a decay parameter. An efficient method for estimating these parameters is presented. Further, methods are...
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