发明名称 |
Audio spatial environment up-mixer |
摘要 |
An audio spatial environment engine for flexible and scalable up-mixing from an M channel audio system to an N channel audio system, where M and N are integers and N is greater than M, is provided. The input M channel audio is provided to an analysis filter bank which converts the time domain signals into frequency domain signals. Relevant inter-channel spatial cues are extracted from the frequency domain signals on a sub-band basis and are used as parameters to generate adaptive N channel filters which control the spatial placement of a frequency band element in the up-mixed sound field. The N channel filters are smoothed across both time and frequency to limit filter variability which could cause annoying fluctuation effects. The smoothed N channel filters are then applied to adaptive combinations of the frequency domain input signals and are provided to a synthesis filter bank which generates the N channel time domain output signals.
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申请公布号 |
US2006093152(A1) |
申请公布日期 |
2006.05.04 |
申请号 |
US20050262029 |
申请日期 |
2005.10.28 |
申请人 |
THOMPSON JEFFREY K;REAMS ROBERT W;WARNER AARON |
发明人 |
THOMPSON JEFFREY K.;REAMS ROBERT W.;WARNER AARON |
分类号 |
H04R5/00 |
主分类号 |
H04R5/00 |
代理机构 |
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地址 |
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