參數(shù)資料
型號: TVP5146M2IPFPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 顏色信號轉(zhuǎn)換
英文描述: COLOR SIGNAL DECODER, PQFP80
封裝: GREEN, PLASTIC, HTQFP-80
文件頁數(shù): 23/107頁
文件大?。?/td> 949K
代理商: TVP5146M2IPFPR
Bandpass
Filter
x
Gain
Peaking
Filter
IN
+
OUT
Delay
Peak
Detector
f – Frequency – MHz
1
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Gain = 0
Gain = 2
Gain = 1
Gain = 0.5
Peak at
f = 2.64 MHz
Amplitude
dB
SLES141G
– JULY 2005 – REVISED APRIL 2011
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 2-8 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 2-9 shows the characteristics of the peaking
filter at four different gain settings that are programmable via the host port.
Figure 2-8. Luminance Edge-Enhancer Peaking Block Diagram
Figure 2-9. Peaking Filter Response, NTSC/PAL ITU-R BT.601 Sampling
2.2.4
Color Transient Improvement (CTI)
CTI enhances horizontal color transients by delay modulation for both color difference signals. The
operation must be performed only on YCbCr-formatted data. The color difference signal transition points
are maintained, but the edges are enhanced for signals that have bandwidth-limited color components (for
example, CVBS and S-Video).
22
Functional Description
Copyright
2005–2011, Texas Instruments Incorporated
Product Folder Link(s): TVP5146M2
相關(guān)PDF資料
PDF描述
TVP5146M2IPFP COLOR SIGNAL DECODER, PQFP80
TVP5146M2PFPR COLOR SIGNAL DECODER, PQFP80
TVP5146M2PFP COLOR SIGNAL DECODER, PQFP80
TVP5146M2PFPRG4 COLOR SIGNAL DECODER, PQFP80
TVP5146M2PFPG4 COLOR SIGNAL DECODER, PQFP80
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5146M2PFP 功能描述:視頻 IC 10B Hi Qual Sgl-Chip 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
TVP5146M2PFP_0708 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 4X10-Bit Digital Video Decoder With Macrovision Detection, YPbPr/RGB Inputs, 5-Line Comb Filter, and SCART Support
TVP5146M2PFPG4 制造商:TI 制造商全稱:Texas Instruments 功能描述:NTSC/PAL/SECAM 4X10-Bit Digital Video Decoder With Macrovision Detection, YPbPr/RGB Inputs, 5-Line Comb Filter, and SCART Support
TVP5146M2PFPR 功能描述:視頻 IC 10B Hi Qual Sgl-Chip 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
TVP5146M2PFPRG4 制造商:Texas Instruments 功能描述: