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FAST RESPONSE DISCRETE TIME INFINITE IMPULSE RESPONSE (IIR) FILTER
FAST RESPONSE DISCRETE TIME INFINITE IMPULSE RESPONSE (IIR) FILTER
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机译:快速响应离散时间无限冲激响应(IIR)滤波器
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摘要
An infinite impulse response (IIR) filter provides fast response time without significant effects of ringing or overshoot. In a first step, an input signal is received and a preliminary output signal is computed based upon at least the input signal and a prior output signal. The preliminary output signal is compared to the input signal, and if the preliminary output signal and the input signal differ by more than a significant amount, the input signal is provided as the output signal. Otherwise, the preliminary output signal can be provided as the output signal. Such a filter be readily implemented in software or other programmable logic, and may have particular utility in preserving the contrast in a filtered video image represented by discrete digital data within a display system.
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