參數(shù)資料
型號(hào)： VPX3214
廠商： Electronic Theatre Controls, Inc.
英文描述： Video Pixel Decoders
中文描述： 視頻解碼器像素
文件頁數(shù)： 14/80頁
文件大小： 752K
代理商： VPX3214
PRELIMINARY DATA SHEET
VPX 3220 A, VPX 3216 B, VPX 3214 C
MICRONAS INTERMETALL
14
2.4. Color Space Stage
The color space stage (Fig. 2–19) of the VPX 3220 A and
VPX 3216 B optionally performs a series of conversions
in the color space and component format. Generation of
an alpha key signal, compression using quantized differ-
ential coding, and inverse gamma correction are pro-
grammable options.
Beginning with the 24-bit/pixel YCbCr input signal, two
other component formats (4:2:2 and 4:1:1) can be gen-
erated by simple downsampling of the chroma. Alterna-
tively, the 24-bit YCbCr can be dematrixed to produce
24-bit RGB. The RGB components can either be output
directly or further quantized to yield other quantization
formats such as 16-bit (R:5 G:6 B:5) or 15-bit (R:5 G:5
B:5) The table below summarizes the supported output
signal formats.
Compo-
nents
Sampling
Format
Quantization
Format
Bits/
Pixel
YCbCr
4:4:4
4:2:2
4:1:1
4:4:4
(compressed)
8 8 8
8 8 8
8 8 8
8 8 8
24
16
12
8
RGB
4:4:4
4:4:4
4:4:4
8 8 8
5 6 5
5 5 5
24
16
15
2.4.1. Color Space Selection
1
1
1
0
0.344
1.773
1.403
0.714
0
Y
Cb
Cr
R
G
B
An optional dematrix stage converts the YCbCr 4:4:4
data into RGB using the matrix equations specified in the
ITUR 601 recommendation (shown above). The satura-
tion control in the color decoder is first selected to pro-
duce C
b
and C
r
, the ITUR studio chrominance norm. In
the dematrix computation, the full 8-bit resolution is
maintained.
Alpha Key
Dematrix
Compression
4:4:4
4:1:1
4:4:4
4:2:2
888
565
888
555
Quantization
Downsampling
YCbCr
24 bit / pixel
YCbCr
16 bit / pixel
YCbCr
12 bit / pixel
YCbCr
8 bit / pixel
RGB
24 bit / pixel
RGB
16 bit / pixel
RGB
15 bit / pixel
S
e
l
e
c
t
Fig. 2–19:
The color space stage
γ
1
相關(guān)PDF資料
PDF描述
VPX3214C Video Pixel Decoders
VPX3224D Video Pixel Decoders
VPX3224E Video Pixel Decoders
VPX322XE Video Pixel Decoders
VQ1000J N-Channel Enhancement-Mode MOSFET Transistor(最小漏源擊穿電壓60V,夾斷電流0.225A的N溝道增強(qiáng)型MOSFET晶體管)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VPX3214C 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video Pixel Decoders
VPX3214C(PLCC44) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit
VPX3214C(QFP44) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit
VPX3216B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video Pixel Decoders
VPX3216B(PLCC44) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Decoder Circuit
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