Allwinner A20 - Page 558

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 558 / 812
Bit
Read/W
rite
Default/
Hex
Description
31:0
R/W
UDF
IYUV_LINEWIDTH
Line width
The width is the distance from the start of one line to the start of
the next line.
Description in bits
YUV to RGB conversion algorithm formula:
R =
(R Y component coefficient * Y) +
(R U component coefficient * U) +
(R V component coefficient * V) +
R constant
G =
(G Y component coefficient * Y) +
(G U component coefficient * U) +
(G V component coefficient * V) +
G constant
B =
(B Y component coefficient * Y) +
(B U component coefficient * U) +
(B V component coefficient * V) +
B constant
5.4.4.30. DE BACKEND Y/G COEFFICIENT REGISTER
Offset:
G/Y component: 0x950
R/U component: 0x954
B/V component: 0x958
Register Name: DEBE_YGCOEF_REG
Bit
Read/W
rite
Default/
Hex
Description
31:29
/
/
/
28:16
R/W
UDF
DF_YGCOEF
the Y/G coefficient for de-flicker
the value equals to coefficient*2
10