欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號: MC44002
廠商: Motorola, Inc.
英文描述: CHROMA 4 VIDEO PROCESSOR
中文描述: 色度4視頻處理器
文件頁數(shù): 16/40頁
文件大小: 491K
代理商: MC44002
MC44002 MC44007
16
MOTOROLA ANALOG IC DEVICE DATA
PAL/NTSC
(MCU)
29
Luma
36
B-Y
37
R-Y
39
1
B-Y
R-Y
SECAM
Decoder
32
33
Oscillator
14.3MHz
17.7MHz
C
C
PLL
ACC
PAL/NTSC Decoder
4.4/8.8MHz
System Select
Hue Controls
V
U
Ident
(MCU)
4.4/8.8MHz
Luma
Delay
Line
Ident Data
(MCU)
Luma–Chroma Filters
t1, t2
Video 2
Video 1
38
Figure 8. Chroma Decoder
AGC
Q
S-VHS
Crystal
Select
S-VHS
Delay ADJ
To Color
Difference
Stage
11
SECAM
Cal
Loop
2
40
Peaking
Syn
Sep
t3
Input
Select
Y1
NOTES:
SECAM decoding
available in the MC44002 only.
The actual decision as to a signal’s identity is made by the
MCU based on data provided by 3 flags returned to it,
namely: ACC Active, PAL Identified, and SECAM Identified.
Control bits SSA–SSD must be sent to set the decoder to
the correct standard.
This allows a maximum of flexibility, since the software
may be written to accommodate many different sets of
circumstances. For example, channel information could be
taken into account if certain channels always carry signals in
the same standard. Alternatively, if one standard is never
going to be received, the software can be adapted to this
circumstance. If none of the flags are on, color killing can be
implemented by the MCU. This occurs if the net Ident Signal
is too low, or if the ACC circuit is inactive due to too low a
signal level.
The demodulated color difference signals now enter the
Hue control section, where selection is made between
PAL/NTSC and SECAM outputs. The Hue control is simply
realized by altering the amplitudes of both color difference
signals together. Hue control is only a requirement in NTSC
mode and would not normally be used for other standards.
The function is usually carried out prior to demodulation of
the chroma by shifting the phase of the subcarrier reference,
causing decoding to take place along different axes. In the
MC44002/7, Hue control is performed on the already
demodulated color difference signals. A proportion of the R-Y
signal is added or subtracted to the B-Y signal and
vice-versa. This has the same effect as altering the reference
phase. If desired, the MC44002/7 can apply the Hue control
to simple PAL signals.
After manipulation by the Saturation and Hue controls, the
color difference signals are finally filtered to reduce any
remaining subcarrier and multiplier products. Before leaving
the chip at Pins 36 and 37, the signals are blanked during line
and frame intervals. The 64
μ
s chroma delay line is carried
out by a companion device, the MC44140.
SECAM Decoder (MC44002 only)
The SECAM signal from the high-pass filter enters tightly
controlled AGC amplifiers wrapped around a cloche filter
which is a sampled recursive type, with the AGC derived from
a signal squarer. Next, the signal is blanked during the
calibration gate period and a reference 4.43 MHz is inserted
during this time. The SECAM signal is then passed through a
limiter.
The frequency demodulator function is carried out by a
frequency-locked-loop (F.L.L.). This consists of three
components: a tracking filter, a phase detector and a loop
filter. The center frequency of the tracking filter depends on
three factors: internal R-C product, ADJUST voltage, and
TUNING voltage. The tracking filter is dynamically tuned by
the TUNING feedback from the loop-filter forming the F.L.L.
The ADJUST control calibrates the F.L.L. and compensates
for variations in the R-C product. After the F.L.L., the color
difference signals are passed to another block where several
functions are carried out. The signals are de-emphasized
and outputs are provided to the Ident section. Another
function of this section is to generate the ICOMP signal used
for calibrating the F.L.L. This signal is blanked during the
H-IG period to ensure that (R-Y) and (B-Y) output signals
have a clean dc level for clamping purposes.
In addition, components are added to compensate for the
R-C product, and tuning offsets are introduced during the
active lines for F0R/F0B.
Calibration of the F.L.L. takes place during every field
blanking interval, starting from field retrace and ending just
before the SECAM vertical Ident sequence (bottles). The
calibration current ICAL is derived from ICOMP during the
相關PDF資料
PDF描述
MC44002P CHROMA 4 VIDEO PROCESSOR
MC44007P CHROMA 4 VIDEO PROCESSOR
MC44007 CHROMA 4 VIDEO PROCESSOR
MC44035FTB MULTISTANDARD VIDEO SIGNAL PROCESSOR WITH INTEGRATED CHROMA DELAY LINE
MC44030FTB MULTISTANDARD VIDEO SIGNAL PROCESSOR WITH INTEGRATED CHROMA DELAY LINE
相關代理商/技術(shù)參數(shù)
參數(shù)描述
MC44002P 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CHROMA 4 VIDEO PROCESSOR
MC44005A6W-BNMLW 制造商:MIDAS 功能描述:LCD 4X40 NEG STN WHITE LED B/L 5V 制造商:MIDAS 功能描述:LCD, 4X40, NEG STN, WHITE LED B/L 5V 制造商:MIDAS 功能描述:LCD, 4X40, NEG STN, WHITE LED B/L 5V; No. of Digits / Alpha:160; Character Count x Line:40 x 4; Backlighting Color:White; Character Size:4.89mm; Supply Voltage:5V; Display Mode:Transmissive; Display Area Width:147mm ;RoHS Compliant: Yes
MC44005A6W-FPTLW 制造商:MIDAS 功能描述:LCD 4X40 FSTN WHITE LED B/L 5V 制造商:MIDAS 功能描述:LCD, 4X40, FSTN, WHITE LED B/L 5V 制造商:MIDAS 功能描述:LCD, 4X40, FSTN, WHITE LED B/L 5V; No. of Digits / Alpha:160; Character Count x Line:40 x 4; Backlighting Color:White; Character Size:4.89mm; Supply Voltage:5V; Display Mode:Transflective; Display Area Width:147mm ;RoHS Compliant: Yes
MC44007 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CHROMA 4 VIDEO PROCESSOR
MC44007P 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:CHROMA 4 VIDEO PROCESSOR
主站蜘蛛池模板: 水城县| 唐河县| 鱼台县| 垦利县| 新晃| 桃园市| 社会| 蓬安县| 沂水县| 宣城市| 密山市| 云阳县| 文登市| 镇康县| 巨鹿县| 三门峡市| 新宾| 资源县| 城固县| 清水河县| 永泰县| 田林县| 马关县| 舟曲县| 娱乐| 台东县| 潍坊市| 辽阳市| 洪泽县| 凤阳县| 额济纳旗| 曲周县| 勐海县| 弋阳县| 涿鹿县| 嘉禾县| 怀宁县| 额敏县| 祁阳县| 安多县| 兰溪市|