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參數(shù)資料
型號: 935262451518
廠商: NXP SEMICONDUCTORS
元件分類: 顏色信號轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP100
封裝: 14 X 14 X 1.40 MM, PLASTIC, SOT-407, LQFP-100
文件頁數(shù): 91/144頁
文件大小: 592K
代理商: 935262451518
2000 Mar 15
50
Philips Semiconductors
Preliminary specication
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb lter, VBI-data slicer and high performance scaler
SAA7114H
In Tables 12 and 13 PHO is a usable common phase
offset.
Please notice that the equations of Fig.29 are producing
an interpolated output also for the unscaled case, as the
geometrical reference position for all conversions is the
position of the first line of the lower field (see Table 12).
If there is no need for UP-LO and LO-UP conversion and
the input field ID is the reference for the back-end
operation, then it is UP-LO = UP-UP and LO-UP = LO-LO
and the 1
2 line phase shift (PHO + 16) can be skipped.
This case is listed in Table 13.
The SAA7114H supports 4 phase offset registers per task
and component (luminance and chrominance). The value
of 20H represents a phase shift of one line.
The registers are assigned to the following events;
e.g. subaddresses B8H to BBH:
B8H: 00 = input field ID 0, task status bit 0 (toggle
status, see Section 8.3.1.3)
B9H: 01 = input field ID 0, task status bit 1
BAH: 10 = input field ID 1, task status bit 0
BBH: 11 = input field ID 1, task status bit 1.
Dependent on the input signal (interlaced or
non-interlaced) and the task processing (50 Hz or field
reduced processing with one or two tasks, see examples
in Section 8.3.1.3), also other combinations may be
possible, but the basic equations are the same.
Table 12 Examples for vertical phase offset usage: global equations
INPUT FIELD UNDER
PROCESSING
OUTPUT FIELD
INTERPRETED AS
USED ABBREVIATION
EQUATION FOR PHASE OFFSET
CALCULATION (DECIMAL VALUES)
Upper input lines
upper output lines
UP-UP
PHO + 16
Upper input lines
lower output lines
UP-LO
Lower input lines
upper output lines
LO-UP
PHO
Lower input lines
Lower output lines
LO-LO
PHO
YSCY[15:0]
64
-------------------------------
16
++
PHO
YSCY[15:0]
64
-------------------------------
+
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