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參數(shù)資料
| 型號： | ADV601LCJSTZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 42/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CODEC VIDEO DSP/SRL 120LQFP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 視頻編解碼器 |
| 數(shù)據(jù)接口： | DSP，串行 |
| 分辨率（位）： | 8 b |
| 三角積分調(diào)變： | 無 |
| 電壓 - 電源，模擬： | 4.5 V ~ 5.5 V |
| 電壓 - 電源，數(shù)字： | 4.5 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 120-LQFP |
| 供應(yīng)商設(shè)備封裝： | 120-LQFP（14x14） |
| 包裝： | 托盤 |
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ADV601LC
–7–
REV. 0
THE PROGRAMMABLE QUANTIZER
This block quantizes the filtered image based on the response
profile of the human visual system. In general, the human eye
cannot resolve high frequencies in images to the same level of
accuracy as lower frequencies. Through intelligent “quantiza-
tion” of information contained within the filtered image, the
ADV601LC achieves compression without compromising the
visual quality of the image. Figure 7 shows the encode and de-
code data formats used by the quantizer.
Figure 8 shows how a typical quantization pattern applies over
Mallat block data. The high frequency blocks receive much
larger quantization (appear darker) than the low frequency
blocks (appear lighter). Looking at this figure, one sees some key
point concerning quantization: (1) quantization relates directly
to frequency in Mallat block data and (2) levels of quantization
range widely from high to low frequency block. (Note that the
fill is based on a log formula.) The relation between actual
ADV601LC bin width factors and the Mallat block fill pattern
in Figure 8 appears in Table II.
9.7
WAVELET
DATA
6.10 1/BW
15.17 DATA
0.5
15.0 BIN
NUMBER
QUANTIZER - ENCODE MODE
TRNC
SIGNED
UNSIGNED
1/BW
QUANTIZER - DECODE MODE
8.8 BW
23.8 DEQUANTIZED
WAVELET DATA
9.7
WAVELET
DATA
15.0 BIN
NUMBER
SIGNED
UNSIGNED
SAT
BW
Figure 7. Programmable Quantizer Data Flow
41
38
35
32
26
23
29
20
17
14
8
5
11
2
39
36
33
30
24
21
27
18
15
12
6
3
9
0
Y COMPONENT
40
37
34
31
25
22
28
19
16
13
7
4
10
1
Cb COMPONENT
Cr COMPONENT
LOW
HIGH
QUANTIZATION OF MALLAT BLOCKS
Figure 8. Typical Quantization of Mallat Data Blocks (Graphed)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADV601LCJSTZRL | 功能描述:IC CODEC VIDEO DSP/SRL 120LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| ADV601LC-VIDEOPIPE | 制造商:Analog Devices 功能描述:TOOLS:DEVELOPMENT BOARDS H/W 制造商:Analog Devices 功能描述:EVALUATION BOARD ((NS)) |
| ADV601XS | 制造商:Analog Devices 功能描述: |
| ADV611 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CLOSED CIRCUIT TV DIGITAL VIDEO CODEC |
| ADV611JST | 制造商:Analog Devices 功能描述:Video Compression 120-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:CLOSED CIRCUIT TV VIDEO CODEC - TQFP PKG - Tape and Reel |
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