| DSP Blockset | |
Unbuffering a Frame-Based Signal into a Sample-Based Signal
You can unbuffer a multichannel frame-based signal into a multichannel sample-based signal by using the Unbuffer block in the Buffers library (in Signal Management).
The Unbuffer block performs the inverse operation of the Buffer block's "sample-based to frame-based" buffering process, and generates an N-channel sample-based output from an N-channel frame-based input. The first row in each input matrix is always the first sample-based output. In other words, the Unbuffer block unbuffers each input frame from the top down.
The sample period of the sample-based output, Tso, is related to the input frame period, Tfi, by the input frame size, Mi.
The Unbuffer block always preserves the signal's sample period (Tso = Tsi). See Converting Sample Rates and Frame Rates for more information about rate conversions.
Example: Unbuffering a Frame-Based Signal. In the model below, a two-channel frame-based signal is unbuffered into a two-channel sample-based signal.
To build the model, make the following parameter settings:
The Signal From Workspace block generates a two-channel frame based-signal with frame size 4 (because the Samples per frame parameter is set to 4). The Unbuffer block unbuffers this signal to a two-channel sample-based signal.
| Note The Unbuffer block generates initial conditions (not shown in the figure above) with the value specified by the Initial conditions parameter. See the Unbuffer reference page for information about the number of initial conditions that appear in the output. |
| | Splitting a Multichannel Signal into Individual Signals | Reordering Channels in a Frame-Based Multichannel Signal | |
