參數(shù)資料
型號(hào)： TVP5146M2PFPRG4
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(yè)數(shù)： 19/107頁(yè)
文件大?。?/td> 1427K
代理商： TVP5146M2PFPRG4
Functional Description
11
SLES141B—August 2007
TVP5146M2PFP
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 TVP5146M2 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
TVP5146M2PFPG4 COLOR SIGNAL DECODER, PQFP80
TVP5146PFPRG4 COLOR SIGNAL DECODER, PQFP80
TVP5146PFP COLOR SIGNAL DECODER, PQFP80
TVP5146PFPR COLOR SIGNAL DECODER, PQFP80
TVP5146PFPG4 COLOR SIGNAL DECODER, PQFP80
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TVP5146PFP 功能描述:視頻 IC 10B High Qual S-Chip Dig Vid 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
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
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