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(hào)： ADV601
廠商： Analog Devices, Inc.
元件分類： 視頻Codec
英文描述： Low Cost Multiformat Video Codec
中文描述： 低成本多格式視頻解碼器
文件頁(yè)數(shù)： 4/52頁(yè)
文件大?。?/td> 606K
代理商： ADV601
ADV601
–4–
REV. 0
THE WAVELET KERNEL
This block contains a set of filters and decimators that work on
the image in both horizontal and vertical directions. Figure 6
illustrates the filter tree structure. The filters apply carefully
chosen wavelet basis functions that better correlate to the broad-
band nature of images than the sinusoidal waves used in Dis-
crete Cosine Transform (DCT) compression schemes (JPEG,
MPEG, and H261).
An advantage of wavelet-based compression is that the entire
image can be filtered without being broken into sub-blocks as
required in DCT compression schemes. This full image filtering
eliminates the block artifacts seen in DCT compression and
offers more graceful image degradation at high compression
ratios. The availability of full image sub-band data also makes
image processing, scaling, and a number of other system fea-
tures possible with little or no computational overhead.
The resultant filtered image is made up of components of the
original image as is shown in Figure 3 (a modified Mallat Tree).
Note that Figure 3 shows how a component of video would be
filtered, but in multiple component video luminance and color
components are filtered separately. In Figure 4 and Figure 5 an
actual image and the Mallat Tree (luminance only) equivalent is
shown. It is important to note that while the image has been
filtered or transformed into the frequency domain, no compres-
sion has occurred. With the image in its filtered state, it is now
ready for processing in the second block, the quantizer.
BLOCK A IS HIGH PASS IN X AND DECIMATED BY TWO.
BLOCK B IS HIGH PASS IN X, HIGH PASS IN Y, AND DECIMATED BY EIGHT.
BLOCK C IS HIGH PASS IN X, LOW PASS IN Y, AND DECIMATED BY EIGHT.
BLOCK D IS LOW PASS IN X, HIGH PASS IN Y, AND DECIMATED BY EIGHT.
BLOCK E IS HIGH PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 32.
BLOCK F IS HIGH PASS IN X, LOW PASS IN Y, AND DECIMATED BY 32.
BLOCK G IS LOW PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 32.
BLOCK H IS HIGH PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 128.
BLOCK I IS HIGH PASS IN X, LOW PASS IN Y, AND DECIMATED BY 128.
BLOCK J IS LOW PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 128.
BLOCK K IS HIGH PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 512.
BLOCK L IS HIGH PASS IN X, LOW PASS IN Y, AND DECIMATED BY 512.
BLOCK M IS LOW PASS IN X, HIGH PASS IN Y, AND DECIMATED BY 512.
BLOCK N IS LOW PASS IN X, LOW PASS IN Y, AND DECIMATED BY 512.
N
M
L
K
I
H
J
G
F
E
C
B
D
A
Figure 3. Modified Mallat Diagram (Block Letters Correspond to Those in Filter Tree)
Understanding the structure and function of the wavelet filters
and resultant product is the key to obtaining the highest perfor-
mance from the ADV601. Consider the following points:
The data in all blocks (except N) for all components are high
pass filtered. Therefore, the mean pixel value in those blocks
is typically zero and a histogram of the pixel values in these
blocks will contain a single “hump” (Laplacian distribution).
The data in most blocks is more likely to contain zeros or
strings of zeros than unfiltered image data.
The human visual system is less sensitive to higher frequency
blocks than low ones.
Attenuation of the selected blocks in luminance or color com-
ponents results in control over sharpness, brightness, contrast
and saturation.
High quality filtered/decimated images can be extracted/created
without computational overhead.
Through leverage of these key points, the ADV601 not only
compresses video, but offers a host of application features. Please
see the Applying the ADV601 section for details on getting the
most out of the ADV601’s sub-band coding architecture in
different applications.
相關(guān)PDF資料
PDF描述
ADV601JS Low Cost Multiformat Video Codec
ADV601LC Ultralow Cost Video Codec
ADV601LCJST Ultralow Cost Video Codec
ADV7120KP30 CMOS 80 MHz, Triple 8-Bit Video DAC
ADV7120 CMOS 80 MHz, Triple 8-Bit Video DAC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV601E-VIDEOPIPE 制造商:Analog Devices 功能描述:VIDEOPIPE
ADV601JS 制造商:Analog Devices 功能描述:Multiformat Video Codec 160-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:- Bulk
ADV601JS12 制造商:Analog Devices 功能描述:Multiformat Video Codec 160-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:DIGITAL VIDEO CODEC REV 1.2 - Bulk
ADV601LC 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Cost Video Codec
ADV601LCERAG1266B-0.5 制造商:Analog Devices 功能描述:
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

*
*
*
主站蜘蛛池模板： 安仁县| 邻水| 南昌县| 申扎县| 阿克陶县| 浏阳市| 吴堡县| 黄石市| 万年县| 印江| 彩票| 沽源县| 宜宾市| 米易县| 香格里拉县| 梓潼县| 景泰县| 安康市| 江山市| 扬中市| 鄢陵县| 湄潭县| 兴国县| 抚州市| 凌源市| 商城县| 汝南县| 和田县| 潮安县| 育儿| 绥棱县| 太仓市| 彰化县| 吉木乃县| 大悟县| 浪卡子县| 巨鹿县| 峡江县| 肥东县| 浙江省| 阿坝|