| 摘要 |
PURPOSE:To obtain a digital filter which controls a phase and an amplitude independently by cascading a phase controller and an amplitude controller. CONSTITUTION:The phase controller 20 which holds amplitude-frequency characteristics of a digital input signal linear and varies phase-frequency characteristics on the basis of specific phase information from a console panel 3 and the amplitude controller 30 composed of a real-time processing linear phase transversal filter 13 which holds the phase-frequency characteristics linear and varies the amplitude-frequency characteristics on the basis of the specific phase information from the console panel 3 are cascaded to constitute the amplitude and phase control type digital filter. Consequently, the amplitude and phase frequency characteristics of the digital input signal are varied independently and optionally. |
