參數(shù)資料
型號: BT849A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 113/141頁
文件大?。?/td> 1149K
代理商: BT849A
Brooktree
103
C
ONTROL
R
EGISTER
D
EFINITIONS
Output Format Register
L848A_A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Output Format Register
Memory Mapped Location 0x048 – (OFORM)
Upon reset it is initialized to 0x00. OFORM(0) is the least significant bit.
Bits
Type
Default
Name
Description
[7]
RW
0
RANGE
Luma Output Range: This bit determines the range for the lumi-
nance output on the Bt848. The range must be limited when using
the control codes as video timing.
0
= Normal operation (Luma range 16–253,
chroma range 2–253).
Y=16 is black (pedestal).
Cr, Cb=128 is zero color information.
1
= Full-range Output (Luma range 0–255,
chroma range 2–253)
Y=0 is black (pedestal).
Cr, Cb=128 is zero color information.
[6:5]
RW
00
CORE
Luma Coring: These bits control the coring value used by the
Bt848. When coring is active and the total luminance level is below
the limit programmed into these bits, the luminance signal is trun-
cated to zero.
00
= 0 no coring
01
= 8
10
= 16
11
= 32
[4:0]
RW
00000
Reserved
These bits must be set to zero.
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