2D Sharpening FIR Filter Design Example
This design example shows how to perform a two-dimensional finite impulse response (FIR) filtering operation on video stream data in DSP Builder. The model consists of an image stream source block, a 2D sharpening filtering block, and an image stream sink block. The image stream source block reads the input binary file and feeds the data stream to the 2D FIR filtering block. The image stream sink block writes the filtered data stream to an output binary file. The package also includes the utility to convert an avi video file format to and from a binary file format.
Download the files used in this example:
Files in the zip download include:
- example_fir_2d.mdl - DSP Builder design file
- fir_filter_2d.vhd - Wrapper file to generate the Altera® 2D FIR intellectual property (IP) core
- avi-is-avi.exe - DOS executable to convert an avi file to and from a binary file.
Figure 1 shows the top-level diagram of the 2D FIR design example in DSP Builder.
Figure 1. 2D Sharpening FIR Filter Design Example
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Table 1 lists the ports and gives a description for each.
| Table 1. 2D FIR Port Listing |
| Port Name |
Type |
Description |
din_data[7:0] |
Input |
Data input bus |
din_valid |
Input |
Data valid signal that indicates the validity of the input data signals |
dout_ready |
Input |
Data output ready signal |
reset |
Input |
Reset signal |
din_ready |
Output |
Data input ready signal |
dout_data[7:0] |
Output |
Data output bus |
dout_valid |
Output |
Data valid signal that indicates the validity of the output data signals |
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