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參數(shù)資料
| 型號： | TVP5146PFPRG4 |
| 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： | PLASTIC, HTQFP-80 |
| 文件頁數(shù)： | 18/106頁 |
| 文件大?。?/td> | 1500K |
| 代理商： | TVP5146PFPRG4 |
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11
SLES084C August 2007
TVP5146
Copy
Protection
Detector
VBI Data
Processor
Output
Formatter
Composite
Processor
CVBS/Y
C
YCbCr
Y[9:0]
Timing
Processor
AVID
FID
GLCO
XTAL1
XTAL2
RESETB
Component
Processor
CH1 A/D
CH2 A/D
CH3 A/D
Pr/R
Pb/B
Y/G
YCbCr
FSS
HS/CS
VS/VBLK
DATACLK
C[9:0]
CH4 A/D
CVBS/Y/G
Host
Interface
SCL
SDA
Slice VBI Data
2
y
Decimation
PWDN
2
y
Decimation
2
y
Decimation
2
y
Decimation
Figure 22. Digital Video Processor Block Diagram
2.2.1 2
y Decimation Filter
All input signals are oversampled by a factor of 2 (27 MHz). The A/D outputs first pass through
decimation filters that reduce the data rate to 1
× the pixel rate. The decimation filter is a
half-band filter. Oversampling and decimation filtering can effectively increase the overall
signal-to-noise ratio by 3 dB.
2.2.2 Composite Processor
Figure 23 is a block diagram of the TVP5146 digital composite video processing circuit. This
circuit receives a digitized composite or S-video signal from the ADCs and performs Y/C
separation (bypassed for S-video input), chroma demodulation for PAL/NTSC and SECAM, and
YUV signal enhancements.
The 10-bit composite video is multiplied by the subcarrier signals in the quadrature demodulator
to generate color difference signals U and V. The U and V signals are then sent to low-pass
filters to achieve the desired bandwidth. An adaptive 5-line comb filter separates UV from Y
based on the unique property of color phase shifts from line to line. The chroma is remodulated
through a quadrature modulator and subtracted from line-delayed composite video to generate
luma. This form of Y/C separation is completely complementary, thus there is no loss of
information. However, in some applications, it is desirable to limit the U/V bandwidth to avoid
crosstalk. In that case, notch filters can be turned on. To accommodate some viewing
preferences, a peaking filter is also available in the luma path. Contrast, brightness, sharpness,
hue, and saturation controls are programmable through the host port.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TVP5146PFP | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146PFPR | COLOR SIGNAL DECODER, PQFP80 |
| TVP5146PFPG4 | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1PFPG4 | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1PFPRG4 | COLOR SIGNAL DECODER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| TVP5147M1_08 | 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 |
| TVP5147M1IPFP | 功能描述:視頻 IC 10B Hi Qual Sgl-Chip Dig Video Decoder 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 |
| TVP5147M1IPFPR | 功能描述:視頻 IC 10B Hi Qual Sgl-Chip Dig Video Decoder 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 |
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