getFilters - Obtain single-stage filters - MATLAB (original) (raw)

Main Content

Obtain single-stage filters

Syntax

Description

[c](#buhfosq-c) = getFilters([src](#buhfosq-src)) returns the multirate filters cascaded together in src to perform the overall sample rate conversion. The result is aFilterCascade structure, c. Each field of c holds the filter used at a particular stage and gives access to its coefficients and rate-change factors.

example

Examples

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Create src, a multistage sample rate converter with default properties. src converts between 192 kHz and 44.1 kHz. Find the individual filters that are cascaded together to perform the conversion.

src = dsp.SampleRateConverter; c = getFilters(src);

Visualize the frequency response of the decimator used in the first stage of the process.

m = c.Stage1;

[h,w] = freqz(m); plot(w/pi,20*log10(abs(h))) xlabel('\omega / \pi') ylabel('Magnitude (dB)')

Input Arguments

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Multistage sample rate converter, specified as a dsp.SampleRateConverter System object.

Output Arguments

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Single-stage filters, returned as a FilterCascade structure.

Version History

Introduced in R2014b