參數(shù)資料
型號(hào)： ZR36067
廠商： Electronic Theatre Controls, Inc.
英文描述： AV PCI CONTROLLER
中文描述： 影音PCI控制器
文件頁(yè)數(shù)： 47/48頁(yè)
文件大?。?/td> 580K
代理商： ZR36067
47
AV PCI CONTROLLER
Calculating the Horizontal Parameters:
X and We denote two temporary variables:
X = ceil (VidWinWid*64/Wa)
We = floor (VidWinWid*64/X)
HorDcm = 64 - X
hcrop1 = 2*floor((Wa-We)/4)
hcrop2 = Wa - We - hcrop1
HStart and Hend are then calculated from hcrop1 and hcrop2.
In the example:
X = ceil(597*64/720) = 54
We = floor(597*64/54) = 707
HorDcm= 64 - 54 = 10
hcrop1 = 2*floor((720-707)/4) = 6
hcrop2 = 720-707 - 6 = 7
HStart = HStart’ + hcrop1 = 122 + 6 = 128
HEnd = HEnd’ - hcrop2 = 841 - 7 = 834
(834 - 128 + 1 = 707)
The ZR36067 will actually sample-in 707 pixels from every line.
The first 6 and the last 7 active pixels will be cut out.
Calculating the Vertical Parameters
(Regardless of DispMod!)
Y and He denote two temporary variables:
Y = ceil (VidWinHt*64*2/Ha)
He = floor (VidWinHt*64/Y)
VerDcm = 64 - Y
vcrop1 = floor((Ha/2 - He)/2)
vcrop2 = Ha/2 - He - vcrop1
VStart and VEnd are then calculated from vcrop1 and vcrop2.
In the example:
Y = ceil(199*64*2/480) = 54
He = floor(199*64/54) = 235
VerDcm= 64 - 54 = 10
vcrop1 = floor(((480/2) - 235) / 2) = 2
vcrop2 = (480/2) - 235 - 2 = 3
VStart = VStart’ + vcrop1 = 10 + 2 = 12
VEnd = VEnd’ - vcrop2 = 249 - 3 = 246
(246 - 12 + 1 = 235)
The ZR36067 will actually sample-in 235 lines from every field.
The first 2 and the last 3 active lines of every field will be cut out.
Figure 17. Input Image Parameters
H
VSYNC
floor or ceil (Ht/s)
VStart
VEnd’
VStart’
VEnd
H
H
H
H
hcrop1
hcrop2
v
v
Wa
Ha/2
Total size of one input field
Active portion of one input field
The effective portion taken by the ZR36120 according to the
programmed parameters. (The effective portion can be the
entire active field or any partial sub-section of it).
相關(guān)PDF資料
PDF描述
ZR36067PQC AV PCI CONTROLLER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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ZR36110PQC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio/Video Decoder for MPEG
ZR36120PQC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
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