參數(shù)資料
型號(hào)： TVP5146PFP
廠商： TEXAS INSTRUMENTS INC
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： COLOR SIGNAL DECODER, PQFP80
封裝： GREEN, PLASTIC, HTQFP-80
文件頁數(shù)： 26/109頁
文件大?。?/td> 1658K
代理商： TVP5146PFP
15
SLES084C August 2007
TVP5146
2.2.3 Luminance Processing
The digitized composite video signal passes through either a luminance comb filter or a chroma
trap filter, either of which removes chrominance information from the composite signal to
generate a luminance signal. The luminance signal is then fed into the input of a peaking circuit.
Figure 212 illustrates the basic functions of the luminance data path. In the case of S-video, the
luminance signal bypasses the comb filter or chroma trap filter and is fed directly to the circuit.
High-frequency components of the luminance signal are enhanced by a peaking filter
(sharpness). Figure 213, Figure 214, and Figure 215 show the characteristics of the peaking
filter at four different gain settings that are programmable via the host port.
Bandpass
Filter
x
Gain
Peaking
Filter
IN
+
OUT
Delay
Peak
Detector
Figure 212. Luminance Edge-Enhancer Peaking Block Diagram
f – Frequency – MHz
1
0
1
2
3
4
5
6
7
01234567
Gain = 0
Gain = 2
Gain = 1
Gain = 0.5
Peak at
f = 2.40 MHz
Amplitude
dB
f – Frequency – MHz
1
0
1
2
3
4
5
6
7
01234567
Gain = 0
Gain = 2
Gain = 1
Gain = 0.5
Peak at
f = 2.64 MHz
Amplitude
dB
Figure 213. Peaking Filter Response, NTSC
Square Pixel Sampling
Figure 214. Peaking Filter Response,
NTSC/PAL ITU-R BT.601 Sampling
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5146PFP 制造商:Texas Instruments 功能描述:IC VIDEO DECODER 10BIT 30MSPS HTQFP-80 制造商:Texas Instruments 功能描述:IC, VIDEO DECODER, 10BIT 30MSPS HTQFP-80
TVP5146PFPG4 制造商:Texas Instruments 功能描述:10BIT VIDEO DECODER SMD HTQFP80
TVP5146PFPR 功能描述:視頻 IC NTSC/PAL/SECAM 4x10B Dig Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
TVP5147EVM 功能描述:視頻 IC 開發(fā)工具 TVP5147 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Boards 類型:YPbPr to RGBHV Converters 工具用于評(píng)估:LMH1251 工作電源電壓:5 V
TVP5147M1 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 2x10-Bit Digital Video Decoder With Macrovision Detection, YPbPr Inputs, and 5-Line Comb Felter
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