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参数资料
| 型号： | TVP5147M1PFPRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 颜色信号转换 |
| 英文描述： | COLOR SIGNAL DECODER, PQFP80 |
| 封装： | PLASTIC, HTQFP-80 |
| 文件页数： | 12/100页 |
| 文件大小： | 1369K |
| 代理商： | TVP5147M1PFPRG4 |
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Functional Description
11
SLES140A—March 2007
TVP5147M1PFP
2.2
Digital Video Processing
Figure 22 is a block diagram of the TVP5147M1 digital video decoder processing. This block receives
digitized video signals from the ADCs and performs composite processing for CVBS and S-video inputs and
YCbCr signal enhancements for CVBS and S-video inputs. It also generates horizontal and vertical syncs and
other output control signals such as genlock for CVBS and S-video inputs. Additionally, it can provide field
identification, horizontal and vertical lock, vertical blanking, and active video window indication signals. The
digital data output can be programmed to two formats: 20-bit 4:2:2 with external syncs or 10-bit 4:2:2 with
embedded/separate syncs. The circuit detects pseudosync pulses, AGC pulses, and color striping in
Macrovision-encoded copy-protected material. Information present in the VBI interval can be retrieved and
either inserted in the ITU-R BT.656 output as ancillary data or stored in internal FIFO and/or registers for
retrieval via the host port interface.
Copy
Protection
Detector
VBI Data
Processor
Output
Formatter
Composite
Processor
CVBS/Y
C/CbCr
YCbCr
Y[9:0]
Timing
Processor
AVID
FID
GLCO
XTAL1
XTAL2
RESETB
CH1 A/D
CH2 A/D
HS/CS
VS/VBLK
DATACLK
C[9:0]
Host
Interface
SCL
SDA
Slice VBI Data
2
×
Decimation
PWDN
2
×
Decimation
Figure 22. Digital Video Processing Block Diagram
2.2.1 2
× Decimation Filter
All input signals are typically oversampled by a factor of 2 (27 MHz). The A/D outputs initially 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 TVP5147M1 digital composite video processing circuit. This processing
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.
相关PDF资料 |
PDF描述 |
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| TVP5147M1PFP | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1PFPR | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1IPFP | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1IPFPR | COLOR SIGNAL DECODER, PQFP80 |
| TVP5147M1IPFPRQ1 | COLOR SIGNAL DECODER, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TVP5147PFP | 功能描述:视频 IC 10-BIT DIGITAL VIDEO DECODER RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TVP5147PFP_07 | 制造商:TI 制造商全称:Texas Instruments 功能描述:NTSC/PAL/SECAM 2x10-Bit Digital Video Decoder With Macrovision⑩ Detection,YPbPr Inputs,and 5-Line Comb Filter |
| TVP5147PFPG4 | 功能描述:视频 IC 10-BIT DIGITAL VIDEO DECODER RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TVP5147PFPR | 功能描述:视频 IC 10B Hi Qual Sgl-Chip Dig Vid Dec RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TVP5147PFPRG4 | 制造商:TI 制造商全称:Texas Instruments 功能描述:NTSC/PAL/SECAM 2x10-Bit Digital Video Decoder With Macrovision⑩ Detection,YPbPr Inputs,and 5-Line Comb Filter |
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