- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371036 > MC44725VFU (Motorola, Inc.) Digital Video Encoder PDF資料下載
參數(shù)資料
| 型號： | MC44725VFU |
| 廠商： | Motorola, Inc. |
| 英文描述： | Digital Video Encoder |
| 中文描述： | 數(shù)字視頻編碼器 |
| 文件頁數(shù)： | 11/39頁 |
| 文件大?。?/td> | 518K |
| 代理商： | MC44725VFU |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當(dāng)前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁
MC44724/5 Rev 0.21 03/25/97
No.
This document contains information on a new product. Specifications and information herein are subject to change without notice.
Chroma / Luma Encoding
The DVE de-multiplexes the 4:2:2 digital video data stream.
The de-multiplexed Y or Luma samples are interpolated (2X oversampled) at the clock rate. Offset
compensation is then added, next any VBI signals consisting of Closed-Caption, CGMS and WSS are
added to the appropriate lines, then finally composite sync pulses are added to the Luma signal.
(see figure 12.)
De-multiplexed component color CB and CR samples are interpolated (4X oversampled) at the clock rate.
Interpolating simplifies the output filter and allows more accurate encoding. The DVE generates the
necessary subcarrier color frequency for PAL or NTSC encoding from the 27Mhz system clock. This
color subcarrier is then modulated by the base band component color CB and CR signals to create the
video Chroma signal. (see figure 13.)
A 7.5 IRE pedestal is added for the 60Hz field rate. This can be added for the 50Hz field rate through
serial bus control. (see sub-address register descriptions)
11
CVBS and S-VIDEO or YCbCr or RGB Outputs
The internal digital video signals drive 10-bit D/A converters. Converter outputs are bi-directional current
sources where the current is proportional to the digital data with reference to the IBIAS reference current. The
pins CVBS/Cb/B, Y/G and C/Cr/R are the respective composite, Luma and Chroma or Y/Cb/Cr or R/G/B signal
current source pins. Also, each DACs can drive
75ohm
load register.
User can select 2 sets of signals within above 3 sets.
(see "Application Diagram" and "sub-address register descriptions".)
Bias Current Gain
DACs can be switched off through serial bus control to reduce power consumption. Both outputs of unused
DACs should be connected to ground through a resister to avoid charge buildup.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC44BC380 | VHF/ UHF ANTENNA BOOSTER/SPLITTER IC |
| MC54-74HC175 | Quad D Flip-Flop with Common Clock and Reset |
| MC54-74HC175 | Quad D Flip-Flop with Common Clock and Reset |
| MC54-74HC390 | Dual 4-Stage Binary Ripple Counter with ±2 and ±5 Sections |
| MC54-74HC4016 | Quad Analog Switch/ Multiplexer/Demultiplexer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC4474 | 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:N-Channel 30-V (D-S) MOSFET High performance trench technology |
| MC4476 | 制造商:SHENZHENFREESCALE 制造商全稱:ShenZhen FreesCale Electronics. Co., Ltd 功能描述:N-Channel 30-V (D-S) MOSFET High performance trench technology |
| M-C448 | 功能描述:散熱片 QUARTER BRICK HEAT SINK RoHS:否 制造商:Cincon 產(chǎn)品:Heat Sinks 安裝風(fēng)格:Screw 散熱片材料: 散熱片樣式:Longitudinal 熱阻:5.61 C/W 長度:58 mm 寬度:36.8 mm 高度:12.7 mm 設(shè)計目的:DC Convertors |
| MC44802A | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuning Circuit with 1.3GHz Prescaler |
| MC44802AP | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:PLL Tuning Circuit with 1.3GHz Prescaler |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。