首页>
外国专利>
AN ANALYSIS FILTER BANK PART FOR FILTERING REAL-VALUED TIME DOMAIN SIGNALS
AN ANALYSIS FILTER BANK PART FOR FILTERING REAL-VALUED TIME DOMAIN SIGNALS
展开▼
机译:用于过滤实时值域信号的分析过滤器库部件
展开▼
页面导航
摘要
著录项
相似文献
摘要
The invention employs complex-exponential modulation of a low-pass prototype filter and a new method for optimizing the characteristics of this filter. The invention substantially reduces artifacts due to aliasing emerging from independent modifications of subband signals, for example when using a filterbank as an spectral equalizer. The invention is preferably implemented in software, running on a standard PC or a digital signal processor (DSP), but can also be hardcoded on a custom chip. The invention offers essential improvements for various types of digital equalizers, adaptive filters, multiband companders and spectral envelope adjusting filterbanks used in high frequency reconstruction (HFR) systems.
展开▼