參數(shù)資料
型號： TMC22051
廠商： RAYTHEON SEMICONDUCTOR
元件分類： 顏色信號轉換
英文描述： 8-Bit Digital Video Decoder(8位數(shù)字視頻譯碼器)
中文描述： COLOR SIGNAL DECODER
文件頁數(shù)： 56/84頁
文件大?。?/td> 414K
代理商： TMC22051
TMC22x5y
PRODUCT SPECIFICATION
56
P
Y Offset
The 8 bit Y offset adds any offset required in the Y or RGB
data outputs. For example 64 (16) for the 64 (16) to 940
(235) 10 bit (8 bit) 601 outputs. When the output is YC
B
C
R
this offset is applied to the luminance data only. The Y offset
also provides the blanking level for RGB
outputs with syncs.
Matrix Limiters
The different limiters are listed below, 10 bit data is
assumed.
Table 13. Matrix Limiters
Examples of Output Matrix Operation
From the SMPTE-170M specification:
YC
B
C
R
data ranges are:
Y data range is 64 to 940 (876)
C
B
C
R
data ranges are 64 to 960 (+/- 448)
Matrix programming:
YGx = (876 / 540) = 1 + (159/256)
UGx = (448 / 236) = 1 + (230/256)
VGx = (448 / 332) = 1 + (89/256)
YOFF = 64
PED = 44
PAL digital composite input and RGB (0-1023) outputs:
The nominal scaling factors are simply:
YGx = 1023/572 = 1 + (202/256)
UGx = (1023/572)*(1/0.492) = 3 + (163/256)
VGx = (1023/572)*(1/0.877) = 2 + (10/256)
YOFF= 0
PED = 0
It is also possible with the architecture supplied to use the
limiters on the output of the matrix to clip the output video
deliberately by using a slightly larger gain than is required.
The Y_Offset can achieve the same by setting its value to be
one lsb less than the minimum clip level.
Buffer Registers
The BUFFER pin allows the user to externally switch
between two sets of internal registers that have the same
function. This register buffering allows the matrix gain,
picture hue, and luma offset to be changed at a known time
relative to the input data.
Registers 17 to 1D are selected when the BUFFER pin is
LOW and registers 27 to 2D are selected when the BUFFER
pin is HIGH. If the msb of the decoder product code DPC
2
is
LOW, an 8 bit decoder has been selected and the bottom 2
bits of registers 17 to 1A and 27 to 2A are forced to zero.
LMT
1-0
00
01
Comments
RGB output format, limited from 0 to 1023
YC
B
C
R
output format, Y limited from 0 to
1023 and C
B
C
R
limited to +/- 511.
RGB output format, limited from 64 to 940
YC
B
C
R
output format, Y limited from 64 to
940 and C
B
C
R
limited to +/- 448
10
11
Color
White
Yellow
Cyan
Green
Magenta
Red
Blue
Black
Y
U
0
V
0
54
-332
-278
278
332
-54
0
584
523
423
361
267
205
105
44
-236
79
-156
156
-79
236
0
Decoder Output
Y
C
B
939
0
841
-448
678
150
578
-296
426
296
CCIR 601 Spec
Y
C
B
940
0
840
-448
678
151
578
-296
426
296
Color
White
Yellow
Cyan
Green
Magenta
C
R
0
73
-447
-376
376
C
R
0
72
-448
-375
375
Red
Blue
Black
325
163
64
-150
448
0
447
-73
0
326
164
64
-151
448
0
448
-72
0
Color
White
Yellow
Cyan
Green
Magenta
Red
Blue
Black
Y
U
0
V
0
57
-352
-295
295
352
-57
0
572
507
401
336
236
171
65
0
-250
84
-165
165
-84
250
0
Color
White
Yellow
Cyan
Green
Magenta
Red
Blue
Black
G
R
B
1023
1023
1023
1023
0
0
0
0
1023
1023
0
0
1023
1023
0
0
1023
0
1023
1
1022
1
1023
0
Decoder Output
Y
C
B
CCIR 601 Spec
Y
C
B
Color
C
R
C
R
相關PDF資料
PDF描述
TMC22052 8-Bit Digital Video Decoder(8位數(shù)字視頻譯碼器)
TMC22053 8-Bit Digital Video Decoder(8位數(shù)字視頻譯碼器)
TMC22152 8-Bit/10-Bit Digital Video Decoder(8位/10位數(shù)字視頻譯碼器)
TMC22153 8-Bit/10-Bit Digital Video Decoder(8位/10位數(shù)字視頻譯碼器)
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