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Linear Phase Filters

Filters that delay all frequencies by the same amount are called linear phase filters.

Linear phase filters have a symmetric impulse response.

Figure 2: Filter impulse response.
\scalebox{0.4}{\includegraphics{eps/lpir.eps}}

For this filter, the impulse response is symmetric about sample 0.5, which corresponds to a waveform delay of one-half sample at all frequencies.

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``Music 171: Introduction to Delay and Filters'' by Tamara Smyth, Computing Science, Simon Fraser University.
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Copyright © 2019-03-07 by Tamara Smyth.
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