參數(shù)資料
型號(hào)： S5D0127X01
廠商： SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述： MULTISTANDARD VIDEO DECODER/SCALER
中文描述： 多標(biāo)準(zhǔn)視頻解碼器/倍線器
文件頁(yè)數(shù)： 16/96頁(yè)
文件大小： 1509K
代理商： S5D0127X01
ELECTRONICS
S5D0127X01 Data Sheet
MULTIMEDIA VIDEO
PAGE 16 OF 96
Modified on May/04/2000
current field. To distinguish between fields 1, 2 verse fields 3, 4 (or fields 1, 2, 3, 4 verse fields 5, 6, 7, 8 for PAL) the
phase of the color burst relative to the sync tip must be measured. That information is provided by the SCH pin.
The S5D0127X01 provides the output of a comparator that measures whether the current color burst phase
relative to the falling edge of the sync is greater or less than a predetermined constant. This constant is controlled
with
SCHCMP[3:0]
. The polarity of the SCH output pin depends on the current
SCHCMP[3:0]
value. The SCH
signal changes every video line. The SCH for line 260 is held for the entire vertical blanking period. By using the
SCH signal for the same line from each field, proper field identification can be determined. Figure 8 shows field
identification values for
SCHCMP[3:0]
=0. It is important to note that the SCH value is only valid for video signals
that have a constant sync tip to color burst relationship. This is not the case with consumer VCRs.
.
Figure 7. Short Term Vertical Timing
HS1
(default)
VS
ODD
VAV
EVAV
ODD FIELD and VALIGN = 0
60 Hz - CCIR 601 = 885, Square = 708
50 Hz - CCIR 601 = 891, Square = 971
0, except 60 Hz Square = 2
EVEN FIELD or VALIGN = 1
27, except 60 Hz Square = 28
0, except 60 Hz Square = 2
VS
ODD
Note: Numbers shown are in CK. Active high polarities are used. Timing shown for VAV and EVAV are with qualifier off.
15, except 60 Hz Square = 14
60 Hz - 261
50 Hz - CCIR 601 = 273, Square = 341
HAV
default width for each input standard and output mode
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