AS0260CSSC28SUD20 datasheet(40/83 Pages) ONSEMI

40 / 83 page

AS0260 DS Rev. G Pub. 5/15 EN

©Semiconductor Components Industries, LLC, 2015.

AS0260: 1/6-Inch 1080P High-Definition (HD) System-On-A-Chip (SOC) Digi-

tal Image Sensor

Output Conversion and Formatting

The YUV data stream can either exit the color pipeline as is or be converted before exit to

an alternative YUV or RGB data format.

Color Conversion Formulas

Y'U'V'

This conversion is BT 601 scaled to make YUV range from 0 through 255. This setting is

recommended for JPEG encoding and is the most popular, although it is not well defined

and often misused in various operating systems.

(EQ 1)

(EQ 2)

(EQ 3)

There is an option where 128 is not added to U'V'.

Y'Cb'Cr' Using sRGB Formulas

The AS0260 implements the sRGB standard. This option provides YCbCr coefficients for

a correct 4:2:2 transmission.

Note:

16 < Y601< 235; 16 < Cb < 240; 16 < Cr < 240; and 0 < = RGB < = 255

(EQ 4)

(EQ 5)

(EQ 6)

Y'U'V' Using sRGB Formulas

These are similar to the previous set of formulas, but have YUV spanning a range of 0

through 255.

(EQ 7)

(EQ 8)

(EQ 9)

There is an option to disable adding 128 to U'V'. The reverse transform is as follows:

(EQ 10)

(EQ 11)

(EQ 12)

 0.299 R 0.587 G 0.114 B



 0.564 (B Y 

–

128



 0.713 (R Y 

–

128



 (0.2126 R 0.7152 G 0.0722 B  (219 256) + 16





 0.5389 (B Y  (224 256) + 128





–



 0.635 (R Y  (224 256) + 128





–



 0.2126 R 0.7152 G 0.0722 B



 0.5389 (B Y)

–

128

0.1146

–

R '

0.3854

0.5

128



–



 0.635 (R Y 

–



128

0.5

R '

0.4542

G '

0.0458

128



–



–



 Y

1.5748

128

–





 Y 0.1873 (U 128

–





–

0.4681

128)

–



–

 Y 1.8556 (U 128)

–



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