參數(shù)資料
型號(hào)： VDP3104B
廠商： MICRONAS SEMICONDUCTOR HOLDING AG
元件分類： 消費(fèi)家電
英文描述： Video Processor Family
中文描述： SPECIALTY CONSUMER CIRCUIT, PDIP64
封裝： SHRINK, PLASTIC, DIP-64
文件頁(yè)數(shù)： 13/72頁(yè)
文件大?。?/td> 603K
代理商： VDP3104B
PRELIMINARY DATA SHEET
VDP 31xxB
13
Micronas
2.4. Horizontal Scaler
The 4:2:2 YCrCb signal from the color decoder is pro-
cessed by the horizontal scaler. The scaler block allows
a linear or nonlinear horizontal scaling of the input video
signal in the range of 0.25 to 4. Nonlinear scaling, also
called
“
panorama vision
”
, provides a geometrical distor-
tion of the input picture. It is used to fit a picture with 4:3
format on a 16:9 screen by stretching the picture geome-
try at the borders. Also, the inverse effect can be pro-
duced by the scaler. A summary of scaler modes is given
in Table 2
–
2.
The scaler contains a programmable decimation filter, a
1-line FIFO memory, and a programmable interpolation
filter. The scaler input filter is also used for pixel skew
correction, see 2.3.9. The decimator/interpolator struc-
ture allows optimal use of the FIFO memory. The con-
trolling of the scaler is done by the internal Fast Proces-
sor.
Table 2
–
2:
Scaler modes
Mode
Scale
Factor
Description
Compression
4:3
→
16:9
0.75
linear
4:3 source displayed on a
16:9 tube,
with side panels
Panorama
4:3
→
16:9
non-
linear
compr
4:3 source displayed on a
16:9 tube,
Borders distorted
Zoom
4:3
→
4:3
1.33
linear
Letterbox source (PAL+)
displayed on a 4:3 tube,
vertical overscan with
cropping of side panels
Panorama
4:3
→
4:3
non-
linear
zoom
Letterbox source (PAL+)
displayed on a 4:3 tube,
vertical overscan, bor-
ders distorted, no crop-
ping
2.5. Black-Line Detector
In case of a letterbox format input video, e.g. Cinema-
scope, PAL+ etc., black areas at the upper and lower
part of the picture are visible. It is suitable to remove or
reduce these areas by a vertical zoom and/or shift op-
eration.
The VDP 31xxB supports this feature by a letterbox de-
tector. The circuitry detects black video lines by measur-
ing the signal amplitude during active video. For every
field the number of black lines at the upper and lower
part of the picture are measured, compared to the pre-
vious measurement and the minima are stored in the
I
2
C-register BLKLIN. To adjust the picture amplitude, the
external controller reads this register, calculates the ver-
tical scaling coefficient and transfers the new settings,
e.g. vertical sawtooth parameters, horizontal scaling co-
efficient etc., to the VDP.
Letterbox signals containing logos on the left or right
side of the black areas are processed as black lines,
while subtitles, inserted in the black areas, are pro-
cessed as non-black lines. Therefore the subtitles are
visible on the screen. To suppress the subtitles, the verti-
cal zoom coefficient is calculated by selecting the larger
number of black lines only. Dark video scenes with a low
contrast level compared to the letterbox area are indi-
cated by the BLKPIC bit.
2.6. Test Pattern Generator
The YCrCb outputs of the front-end can be switched to
a test mode where YCrCb data are generated digitally
in the VDP 31xxB. Test patterns include luma/chroma
ramps, flat fields and a pseudo color bar pattern.
相關(guān)PDF資料
PDF描述
VDP3108 Single-Chip Video Processor
VDP3130Y Video Processor Family
VDP31XXB Video Processor Family
VDP3108PR Consumer IC
VDSGLD_38.88 TRANS PREBIASED PNP 200MW SOT23
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VDP3108 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Single-Chip Video Processor
VDP3108B 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family
VDP3108PR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Consumer IC
VDP3112B 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family
VDP3116B 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video Processor Family
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*