Video and Image Processing Up Conversion Example Design

Figure 14. Video Source Block
Review and Simulate the Example Design
The Video Source block extracts video frames from a multimedia file
(vip_car.avi) and transmits them using the image streaming protocol
described in the Video and Image Processing Suite User Guide.
f For more information on the Video Source block, refer to the DSP Builder
Reference Manual.
The Video Source block has one input signal and two output signals:
■ Input: ready
■ Data output: data
■ Valid output: valid
The block produces valid output data one clock cycle after the ready
input signal is driven high. The valid output signal is driven high when
the clock is valid.
In this example, the Video Source block is configured to output 8-bit wide
data in sequence, one color plane every clock cycle, over the data output
port as shown in Figure 15.
Figure 15. YCbCr Format Pixel Data at a 4:2:2 Sampling Rate
Y Cb Y Cr Y Cb Y Cr
1 The file name and location of the input file is a parameter of the
Video Source block. Before running the simulation, you should
check that the input file vip_car.avi is in the current MATLAB
directory. Alternatively, you can change the Input file name
parameter of the Video Source block to the absolute path of the
multimedia file of your choice. The Video Source block can
extract video frames from a wide range of multimedia file types,
including still bitmap pictures, provided that the proper codecs
are installed on your system.
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