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): 16/141頁
文件大小: 1149K
代理商: BT849A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Brooktree
6
F
UNCTIONAL
D
ESCRIPTION
Functional Overview
L848A_A
Vertical Blanking Interval
Data Capture
Bt848/848A/849A provides a complete solution for capturing and decoding Verti-
cal Blanking Interval (VBI) data. The Bt848/848A/849A can operate in a VBI Line
Output Mode, in which the VBI data is only captured during select lines. This
mode of operation enables concurrent capture of VBI lines containing ancillary
data and normal video image data.
In addition, the Bt848/848A/849A supports a VBI Frame Output Mode, in
which every line in the video frame is treated as if it was a VBI line. This mode of
operation is designed for use with still frame capture/processing applications.
I
2
C Interface
The Bt848/848A/849A provides a two-wire Inter-Integrated Circuit (I
2
C) inter-
face. As an I
2
C master, Bt848/848A/849A can program other devices on the video
card, such as a TV tuner. Serial clock and data lines, SCL and SDA are used to
transfer data at a rate of 100 Kbits/s.
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