User`s guide

3 Working with Signals
3-22
Rate Conversion Blocks. The following table lists the principal rate conversion
blocks in the DSP Blockset. Blocks marked with an asterisk (*) offer the option
of changing the rate by either adjusting the frame size or frame rate.
The following examples illustrate the two sample rate conversion modes:
•“Example: Rate Conversion by Frame-Rate Adjustment”
•“Example: Rate Conversion by Frame-Size Adjustment”
Example: Rate Conversion by Frame-Rate Adjustment. A common example of direct
rate conversion is shown in the model below, where the signal is directly
downsampled to half its original rate by a Downsample block. The values next
to input and output ports are the signal dimensions, displayed by selecting
Signal dimensions from the model window’s Format menu.
Block Library
Downsample * Signal Operations
Dyadic Analysis Filter Bank Filtering / Multirate Filters
Dyadic Synthesis Filter Bank Filtering / Multirate Filters
FIR Decimation * Filtering / Multirate Filters,
FIR Interpolation * Filtering / Multirate Filters
FIR Rate Conversion Filtering / Multirate Filters
Repeat * Signal Operations
Upsample * Signal Operations
Wavelet Analysis Filtering / Multirate Filters
Wavelet Synthesis Filtering / Multirate Filters