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參數(shù)資料
| 型號： | TW2802 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | TW2802/4 Multiple Video Decoder For Security Applications |
| 中文描述： | TW2802 / 4多路視頻解碼器的安全應(yīng)用 |
| 文件頁數(shù)： | 15/80頁 |
| 文件大小： | 946K |
| 代理商： | TW2802 |
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www.techwellinc.com
Preliminary
TW2804/TW2802 Multiple Video Decoder
Techwell, Inc.
Datasheet Rev. 2.4
09/09/2003
15
Video Scaling and Cropping
The TW280X provides two methods to reduce the amount of video pixel data, scaling and
cropping. The scaling function provides video image at lower resolution while the cropping
function supplies only a portion of the video image.
Video Scaling
The TW280X includes a high quality horizontal and vertical down scaler. The video images can
be downscaled in both horizontal and vertical direction to an arbitrary size. The luminance
horizontal scaler includes an anti-aliasing filter to reduce image artifacts in the resized image
and a 32 poly-phase filter to accurately interpolate the value of a pixel. This results in more
aesthetically pleasing video as well as higher compression ratios in bandwidth-limited
applications. Fig 7 shows the frequency response of anti-aliasing filter for horizontal scaling and
Fig 8 shows the 32 poly-phase filter characteristics. Similarly, the vertical scaler also contains
an anti-aliasing filter and 16 poly-phase filter for down scaling. The filter characteristics are
shown in Fig. 9.
0
1
2
3
4
5
6
x 10
6
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
Frequency (Hertz)
M
Fig 7 The Characteristics of Anti-aliasing filter for horizontal luminance scaling
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相關(guān)代理商/技術(shù)參數(shù) |
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| TW2802-FA | 功能描述:IC DECODER VIDEO NTSC/PAL RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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| TW-28-02-FM-D-309-SM | 制造商:Samtec Inc 功能描述:2MM TERMINAL STRIPS - Bulk |
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| TW-28-02-F-S-309-SM | 制造商:Samtec Inc 功能描述:2MM TERMINAL STRIPS - Bulk |
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