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参数资料
| 型号： | TMC2272AH5C2 |
| 厂商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分类： | DSP Peripheral |
| 英文描述： | 12-BIT, DSP-VIDEO IMAGING, PPGA120 |
| 封装： | PLASTIC, PGA-120 |
| 文件页数： | 5/20页 |
| 文件大小： | 170K |
| 代理商： | TMC2272AH5C2 |
TMC2272A
PRODUCT SPECIFICATION
REV. 1.1.3 10/25/00
13
Since Y = 256, U = V = 0, and G = B = R = 255 for saturated
white output, every Y coefcient will be 255 / 255=1.0. The
full matrix for YUV to GBR conversion is:
G = 1.0 (Y)
-0.3443 (U)
-0.7142 (V)
B = 1.0 (Y)
+1.7727 (U)
R = 1.0 (Y)
+1.3965 (V)
Since the largest element is over 1.0 and the largest permissi-
ble coefcient is 511, multiply all elements of the matrix by
256 to obtain the values to load into the TMC2272A:
G =
256 (Y')
- 88 (U')
- 83 (V')
dec.
100
3A8
349
hex
B =
256 (Y')
+ 454 (U')
dec.
100
1C6
hex
R =
256 (Y')
+ 359 (V')
dec.
100
167
hex
For the YUV to RGB conversion, the TMC2272A input data
alignment for 10-bit Y'U'V' is:
0
Y9Y8Y7Y6Y5Y4Y3Y2Y1Y00
U9 U9 U8 U7 U6 U4 U4 U3 U2 U1 U0 0
V9 V9 V8 V7 V6 V5 V4 V3 V2 V1 V0 0
where the doubled U9 and V9 sign bits denote two’s comple-
ment sign extensions. The TMC2272A output data align-
ment for 8-bit GBR is then:
0000G7 G6 G5 G4 G3 G2 G1 G0
0000B7 B6 B5 B4 B3 B2 B1 B0
0000R7 R6 R5 R4 R3 R2 R1 R0
Note that the inputs have to be doubled because the coef-
cient gain is 256, whereas the internal gain is 1 / 512, for a
net gain of 1/2.
Table 5. Summary of Colorspace Conversion Coefcients
Table 6. Conversion Port Assignments and Alignments
Where XY-0 denotes right-justified, (e) denotes sign extension, and XY-1 denotes shifted one bit leftward from a right-justified
position.
Conversion
KAX
KAY
KAZ
KBX
KBY
KBZ
KCX
KCY
KCZ
RGB to YUV
099
3AA
100
12D
356
32A
03A
100
3D6
RGB to YCBCR
083
3B4
0E1
102
36B
344
032
0E1
3DB
YUV to RGB
100
000
3A8
1C6
167
349
000
YCBCR to RGB
149
000
3CE
102
0CC
398
000
Port
AIN
BIN
CIN
XOUT
YOUT
ZOUT
RGB to YUV
R7-0
G7-0
B7-0
Y7-0
U7-0(e)
V7-0(e)
RGB to YCBCR
R7-0
G7-0
B7-0
Y9-0
U9-0(e)
V9-0(e)
YUV to RGB
Y8-1(e)
U8-1(e)
V8-1(e)
R7-0
G7-0
B7-0
YCBCR to RGB
Y9-0
CB9-0(e)
CR9-0(e)
R7-0
G7-0
B7-0
HSV (HSI) Format Conversions
HSV (or HSI) refers to Hue (color), Saturation (vividness),
and Value (intensity or brightness), quantities which are
directly related to the human perception of light and color.
The V (or I) levels are simply the Y (or luminance) levels.
Hue and Saturation are derived from the R-Y and B-Y color
difference values of a signal.
HSV Calculations:
Value (V) = Intensity (I) = Y
Hue (H) = Arctan (B-Y/R-Y)
Saturation (S) =
R-Y = S*cos(H)
B-Y = S*sin(H)
One may use two 64Kx8 ROM look-up-tables to calculate
Hue and Saturation from R-Y and B-Y in an 8-bit system.
However, the nite size of this LUT may limit performance,
especially if the TMC2272A’s full precision is used. The
TMC2330A, developed to translate between rectangular and
polar coordinates, can perform the trigonometric transforma-
tions to 16 bit precision at 50MHz. These calculations are
the same as required in HSV calculations. A 4 Gigabyte x 32
bit LUT can achieve the same accuracy and precision as the
TMC2330A, if it is programmed correctly.
RY
–
()
2
BY
–
()
2
+
相关PDF资料 |
PDF描述 |
|---|---|
| TMC2272AH5C | 12-BIT, DSP-VIDEO IMAGING, PPGA120 |
| TMC2272AKEC2 | 12-BIT, DSP-VIDEO IMAGING, PQFP120 |
| TMC2272AKEC | 12-BIT, DSP-VIDEO IMAGING, PQFP120 |
| TMC2272AH5C3 | 12-BIT, DSP-VIDEO IMAGING, PPGA121 |
| TMC2272AKEC3 | 12-BIT, DSP-VIDEO IMAGING, PQFP120 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TMC2272AH5C3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TMC2272AH6C | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TMC2272AH6C2 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Digital Colorspace Converter 36 Bit Color, 50 MHz |
| TMC2272AH6C3 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Digital Colorspace Converter 36 Bit Color, 50 MHz |
| TMC2272AKEC | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Digital Colorspace Converter 36 Bit Color, 50 MHz |
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