Variable Digital Filters: From Design to Application@@@－設計から応用まで－

Variable digital filters are frequency-selective digital filters whose frequency characteristics, such as the cutoff frequency and bandwidth, can be controlled in real time. Variable digital filters are used in a number of fields such as telecommunications, speech processing and audio processing. This paper discusses recent research activities on variable digital filters, focusing on the problems of design and realization. In addition, research results on variable digital filters regarding their application to adaptive signal processing are also reviewed.

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