A-28	c_pixel	UG-VIPSUITE
			2015.01.23

c_pixel

The declaration for the c_pixel class:

class c_pixel#(parameters BITS_PER_CHANNEL=8, CHANNELS_PER_PIXEL=3);

Table A-18: Method Calls for c_pixel Class

Method Call		Description
function new();		Constructor.
function void copy(c_pixel #(BITS_PER_CHANNEL,		Copies object pixel into this object.
CHANNELS_PER_PIXEL) pix);
function bit[BITS_PER_CHANNEL-1:0] get_		Returns pixel data for channel id.
data(int id);
function void set_data(int id, bit [BITS_PER_		Sets pixel data for channel id.
CHANNEL-1:0] data);

Raw Video Data Format

Altera provides and recommends two Microsoft Windows utilities for translating between .avi and .raw file formats.

You can use the following examples to translate file formats.

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UG-VIPSUITE 2015.01.23

Raw Video Data Format

A-29

• Convert .raw to .avi files.

>avi2raw.exe vip_car_0.avi vip_car_0.raw

"dshow" decoder created Information on the input file: filename: vip_car_0.avi fourcc = ARGB32

width = 160 height = 120 stride = 640 inversed = yes

endianness = little_endian frame_rate = 25

Choose output dimensions, 0 to keep original values (this will apply a crop/pad, not a scaling):

width (160) = 0 height (120) = 0

Choose output colorspace: 1.RGB

2.YCbCr

3.MONO

1

Choose output bps (8, 10) 8

Choose output interlacing: 1.progressive 2.interlaced F0 first 3.interlaced F1 first

1

Choose a number of frames to skip at the start of the sequence (use 0 to start t he decoding from the beginning) :

0

Choose the maximum number of frames to decode (use 0 to decode up to the end of the video) :

0

"raw" encoder created Decoding in progress.......

7 fields extracted deleting decoding chain deleting encoder

press a key to exit 1

• Produce a .raw file and an.spc file that contains the FOURCC information.

> more vip_car_0.spc

fourcc = RGB32 width = 160 height = 120 stride = 640 frame_rate = 25

•To decode the data, the file I/O class reader must see both the .raw and .spc files. The file I/O class reader writes a .raw/.spc file pair that you can view using the .avi encoder utility.

> raw2avi.exe vip_car_1.raw vip_car_1.avi
"raw" decoder created
vip_car_1.raw:
RGB32 160*120, progressive, 25fps
"dshow" encoder created
AVI encoder created
Encoding in progress.......
7 frames encoded
deleting conversion chain
deleting encoder
press a key to exit	Altera Corporation
Avalon-ST Video Verification IP Suite
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	A-30	Raw Video Data Format	UG-VIPSUITE
			2015.01.23

If you don't have a no Windows machine available to run the utilities, you must then provide the video data in the correct format by some other means.

Figure A-7: Supported FOURCC Codes and Data Format

The figure below shows an example of the data format required by the file I/O class for each of the supported FOURCC codes.

YUY 2

				V								Y								U									Y
			Byte 0								Byte 1								Byte			2						Byte			3
	7	6	5	4	3	2	1	0	7	6	5	4	3	2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0

Y 410 / A 2R 10 G 10 B 10

						U or B 10										Y or G 10											V or B 10
			Byte 0								Byte 1									Byte 2								Byte 3
	7	6	5	4	3	2	1	0	7	6	5	4	3	2	1	0	7	6	5		4	3	2	1	0	7	6	5	4	3	2	1	0

Y 210

						Y																		U
			Byte			0						Byte			1						Byte			2						Byte			3
	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0
						Y																		V
			Byte			4						Byte			5						Byte			6						Byte			7
	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0
	IYU 2
				U 0									Y 0									V 0									U 1
			Byte			0						Byte			1						Byte			2						Byte			3
	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0
				Y 1									V 1									U 2									Y 2
			Byte			4						Byte			5						Byte			6						Byte			7
	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0
	RGB 32
													B									G									R
			Byte			0						Byte			1						Byte			2						Byte			3
	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0	7	6	5	4	3		2	1	0

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Choosing the Correct Deinterlacer

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2015.01.23

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You should choose the right deinterlacer based on the quality of the output needed.

The simple Bob deinterlacing option produces the lowest quality outputs; and the motion adaptive high quality (HQ) option produces the highest quality outputs.

Figure B-1: Bob Deinterlacing Option

The figure below shows an example output from Bob deinterlacing option.

To enable this option, select Bob Scanline Interpolation in the Deinterlacer IP core parameter editor. With this moving Dial test sequence, a Bob deinterlacer produces the characteristic staircasing effect on the edges of these diagonal lines. The area is 454 look-up tables (LUTs).

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	B-2	Choosing the Correct Deinterlacer	UG-VIPSUITE
			2015.01.23

Figure B-2: Motion Adaptive Deinterlacing Option

The figure below shows an example output from Motion Adaptive deinterlacing option.

To enable this option, select Motion Adaptive in the Deinterlacer or Deinterlacer II IP core parameter. If you are using the Deinterlacer IP core parameter editor, you need to select Triple buffering with rate conversion for the buffering mode.

With the moving Dial test sequence, a motion-adaptive interlacer detects the motion, preventing incoming artifacts that would otherwise appear. The motion-adaptive interlacer performs a Bob interpo lation and operates on a 3x3 kernel of pixels, therefore has the ability to interpolate along the diagonal and reduce the staircasing effect. The area is 5,188 LUTs for the Deinterlacer IP core and 3, 696 LUTs for the Deinterlacer II IP core.

Figure B-3: Motion Adaptive High Quality Deinterlacing Option

The figure below shows an example output from Motion Adaptive High Quality deinterlacing option.

To enable this option, select Motion Adaptive High Quality in the Deinterlacer II IP core parameter.

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