參數(shù)資料
型號: ADV7178KS
廠商: ANALOG DEVICES INC
元件分類: 顏色信號轉(zhuǎn)換
英文描述: Integrated Digital CCIR-601 to PAL/NTSC Video Encoder
中文描述: COLOR SIGNAL ENCODER, PQFP44
封裝: PLASTIC, MO-112-AA-1, MQFP-44
文件頁數(shù): 19/38頁
文件大小: 280K
代理商: ADV7178KS
ADV7177/ADV7178
–19–
REV. 0
Mode 2: Master Option
HSYNC
,
VSYNC
,
BLANK
(Timing Register 0 TR0 = X X X X X 1 0 1)
In this mode, the ADV7177/ADV7178 can generate horizontal and vertical SYNC signals. A coincident low transition of both
HSYNC
and
VSYNC
inputs indicates the start of an Odd Field. A
VSYNC
low transition when
HSYNC
is high indicates the start
of an even field. The
BLANK
signal is optional. When the
BLANK
input is disabled, the ADV7177/ADV7178 automatically blanks
all normally blank lines as per CCIR-624. Mode 2 is illustrated in Figure 21 (NTSC) and Figure 22 (PAL). Figure 23 illus-
trates the
HSYNC
,
BLANK
and
VSYNC
for an even-to-odd field transition relative to the pixel data. Figure 24 illustrates the
HSYNC
,
BLANK
and
VSYNC
for an odd-to-even field transition relative to the pixel data.
PAL = 12 * CLOCK/2
NTSC = 16 * CLOCK/2
HSYNC
VSYNC
BLANK
PIXEL
DATA
PAL = 132 * CLOCK/2
NTSC = 122 * CLOCK/2
Cb
Y
Cr
Figure 23. Timing Mode 2 Even-to-Odd Field Transition Master/Slave
PAL = 864 * CLOCK/2
NTSC = 858 * CLOCK/2
PAL = 132 * CLOCK/2
NTSC = 122 * CLOCK/2
HSYNC
VSYNC
BLANK
PIXEL
DATA
PAL = 12 * CLOCK/2
NTSC = 16 * CLOCK/2
Cb
Y
Cr
Y
Cb
Figure 24. Timing Mode 2 Odd-to-Even Field Transition Master/Slave
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