YCbCr to RGB Color Space Conversion Design Example
This design example shows how to convert video stream data in YCbCr color space to Studio RGB color space using the Color Space Converter MegaCore® function in DSP Builder. A color space is a mathematical representation of a set of colors. The YCbCr color space is used in video systems, and the red, green, and blue (Studio RGB) color space is widely used for Microsoft Windows graphics. In this example, the Color Space Converter MegaCore function converts the data stream in YCbCr color space to Studio RGB color space.
The model consists of an image stream source block, a color space converter block, and an image stream sink block. The image stream source block reads the input binary file in YCbCr color space and feeds the data stream to the color space converter block. The image stream sink block writes the data stream in RGB color space 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. For information about using this example, refer to the README.txt file.
Download the files used in this example:
The use of this design is governed by, and subject to, the terms and conditions of the Altera Hardware Reference Design License Agreement.
Files in the zip download include:
- example.mdl - DSP Builder design file
- csc.vhd - Wrapper file to generate the Altera® Color Space Converter intellectual property (IP) MegaCore function
- 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 YCbCr to RGB color space conversion design example in DSP Builder.
Figure 1. YCbCr to RGB Color Space Conversion Design Example
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Table 1 lists the ports and gives a description for each.
| Table 1. YCbCr to RGB Design Example Port Listings |
| Port Name |
Type |
Description |
din[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[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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These design examples may only be used within Altera Corporation devices and remain the property of Altera. They are being provided on an “as-is” basis and as an accommodation; therefore, all warranties, representations, or guarantees of any kind (whether express, implied, or statutory) including, without limitation, warranties of merchantability, non-infringement, or fitness for a particular purpose, are specifically disclaimed. Altera expressly does not recommend, suggest, or require that these examples be used in combination with any other product not provided by Altera.
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