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- W2793325839 abstract "Reproducing zones of personal sound is a challenging signal processing problem that has garnered considerable research interest in recent years. We introduce in this work an extended method to multizone soundfield reproduction that overcomes issues with speech privacy and quality. Measures of speech intelligibility contrast (SIC) and speech quality are used as cost functions in an optimization of speech privacy and quality. Novel spatial and (temporal) frequency domain speech masker filter designs are proposed to accompany the optimization process. Spatial masking filters are designed using multizone soundfield algorithms that are dependent on the target speech multizone reproduction. Combinations of estimates of acoustic contrast and long term average speech spectra are proposed to provide equal masking influence on speech privacy and quality. Spatial aliasing specific to multizone soundfield reproduction geometry is further considered in analytically derived low-pass filters. Simulated and real-world experiments are conducted to verify the performance of the proposed method using semi-circular and linear loudspeaker arrays. Simulated implementations of the proposed method show that significant SIC and speech quality is achievable between zones. A range of perceptual evaluation of speech quality mean opinion scores that indicate good quality are obtained while at the same time providing confidential privacy as indicated by SIC. The simulations also show that the method is robust to variations in the speech, virtual source location, array geometry, and number of loudspeakers. Real-world experiments confirm the practicality of the proposed methods by showing that good quality and confidential privacy are achievable." @default.
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- W2793325839 date "2018-06-01" @default.
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- W2793325839 title "Multizone Soundfield Reproduction With Privacy- and Quality-Based Speech Masking Filters" @default.
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- W2793325839 doi "https://doi.org/10.1109/taslp.2018.2798804" @default.
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