Texas Instruments TVP5147M1PFP manual Digital Video Processing, 1 2⋅ Decimation Filter

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Functional Description

2.2Digital Video Processing

Figure 2−2 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.

CH1 A/D

CH2 A/D

2⋅

Decimation

2⋅

Decimation

Copy

 

VBI Data

Slice VBI Data

Protection

 

 

Processor

 

Detector

 

 

 

 

 

 

CVBS/Y

Composite

YCbCr

 

C/CbCr

 

Processor

 

 

 

 

XTAL1

 

FID

 

XTAL2

Timing

VS/VBLK

 

RESETB

HS/CS

 

Processor

 

 

 

 

PWDN

 

 

 

GLCO

 

 

DATACLK

 

 

 

AVID

 

 

Output

Formatter

Host

Interface

Y[9:0]

C[9:0]

SCL

SDA

Figure 2−2. 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 2−3 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.

SLES140A—March 2007

TVP5147M1PFP

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Contents Data Manual Important Notice Contents Section 11.11 Section 11.59 Example List of Illustrations List of Tables Introduction Detailed Functionality Packaged Devices TVP5147M1 ApplicationsRelated Products Ordering InformationFunctional Block Diagram PFP Package TOP View Terminal AssignmentsTerminal Description Name Number Miscellaneous SignalsTerminal Functions −1. Terminal FunctionsVS/VBLK/GPIO Sync SignalsIntroduction ADC Video Input Switch ControlAnalog Processing and A/D Converters PGA5 A/D Converters Analog Input ClampingAutomatic Gain Control Analog Video Output1 2⋅ Decimation Filter Digital Video ProcessingComposite Processor CVBS/C NTSC/PAL−10 −10 − dB −20−30 −40 −50 −60 −70Color Transient Improvement Luminance ProcessingOUT Real-Time Control RTC Clock CircuitsOutput Formatter Name Number Separate Syncs−1. Output Format TerminalFID Vblk Line 525 First Field Video VS StartVblk Start Vblk Start 23 24 Vblk Stop 336 337 622 623 624 625 First Field Video VS StartHorizontal Blanking Cb0 Cr0 HS Start HS Stop Avid Stop Dataclk = 2⋅ Pixel Clock ModeAvid Start Avid Stop Dataclk = 1⋅ Pixel Clock Mode −15. Horizontal Synchronization Signals for 20-Bit 422 ModeD9 MSB Embedded SyncsI2C Host Interface −3. EAV and SAV Sequence−4. I 2C Host Interface Terminal Description Reset and I2C Bus Address SelectionVbus Access 2 I2C OperationWSS Vitc HostI2C Vbus−6. Supported VBI System VBI Data ProcessorVBI System Standard Line Number Number of Bytes LSB VBI Fifo and Ancillary Data in Video Stream−7. Ancillary Data Format and Sequence Byte Description−8. VBI Raw Data Output Format Reset and Initialization−9. Reset Sequence VBI Raw Data Output−10. I 2C Register Summary Adjusting External SyncsRegister Name 2C Subaddress Default Internal Control RegistersVblk start line V bit control 75h 12h VCR trick mode control 76h −11. Vbus Register Summary Input Select Register −12. Analog Channel and Video Mode SelectionMode Inputs Selected Input Select Output HEX Register DefinitionsVideo Standard Register AFE Gain Control RegisterCvbs and S-Video Component Video Autoswitch Mask Register Operation Mode RegisterSubaddress 03h Default 00h Luminance Processing Control 1 Register Color Killer RegisterLuminance Brightness Register Subaddress 08h Default 02h Reserved Trap filter selectLuminance Processing Control 2 Register Luminance Processing Control 3 RegisterChrominance Processing Control 1 Register Luminance Contrast RegisterChrominance Saturation Register Chroma Hue RegisterWCF Subaddress 0Eh DefaultChrominance Processing Control 2 Register Avid Start Pixel RegisterVsync Start Line Register Avid Stop Pixel RegisterHsync Start Pixel Register Hsync Stop Pixel RegisterVblk Stop Line Register CTI Delay RegisterVsync Stop Line Register Vblk Start Line RegisterCTI Control Register Subaddress 2Eh Default 00h CTI coring CTI gainSync Control Register CbCr code Reserved Subaddress 33h Default 40hOutput Formatter 1 Register Output Formatter 2 RegisterOutput Formatter 3 Register Output Formatter 4 Register Output Formatter 5 Register Output Formatter 6 Register Subaddress 39h Default 00hClear Lost Lock Detect Register Read only Status 1 RegisterSubaddress 3Ch Fine gain 3Dh Coarse gain Status 2 RegisterAGC Gain Status Register Color killedGpio Input 1 Register Video Standard Status RegisterGlco FID Gpio Input 2 RegisterAFE Coarse Gain for CH 2 Register Subaddress 46h Default 20h Cgain 1 ReservedSubaddress 47h Default 20h Cgain 2 Reserved AFE Coarse Gain for CH 1 RegisterAFE Coarse Gain for CH 4 Register Subaddress 48h Default 20h Cgain 3 ReservedSubaddress 49h Default 20h Cgain 4 Reserved AFE Coarse Gain for CH 3 RegisterAFE Fine Gain for YChroma Register AFE Fine Gain for Pb RegisterAFE Fine Gain for Pr Register FID control Subaddress 57h Default 00hAFE Fine Gain for CVBSLuma Register Field ID Control RegisterBit and V-bit Control 1 Register Subaddress 69h Default 00hBit mode Reg 69h Reg 75h Mode Standard LPF Nonstandard LPF BitAGC Decrement Speed Control Register Back-End AGC Control RegisterROM Version Register AGC White Peak Processing Register Subaddress 74h Default 00h Luma peak aLuma peak B Composite peak Lines per frame Bit V Bit Control RegisterAGC Increment Speed Register VCR Trick Mode Control RegisterAGC Increment Delay Register Horizontal Shake Increment RegisterCpll Speed Control Register Analog Output Control 1 RegisterChip ID MSB Register Chip ID LSB RegisterStatus Request Register AGC Decrement Delay RegisterVertical Line Count Register VDP TTX Filter And Mask Registers VDP TTX Filter Control Register Pass VDP Fifo Word Count RegisterNibble FilterVDP Line Number Interrupt Register VDP Fifo Reset RegisterVDP Fifo Interrupt Threshold Register VDP Fifo Output Control RegisterVDP Line Stop Register VDP Global Line Mode RegisterVDP Pixel Alignment Register VDP Line Start RegisterVbus Data Access With Vbus Address Increment Register VDP Full Field Enable RegisterVDP Full Field Mode Register Vbus Data Access With No Vbus Address Increment RegisterFifo Thrs TTX WSS VPS Vitc CC F2 CC F1 Vbus Address Access RegisterFifo Read Data Register Interrupt Raw Status 0 RegisterFifo full Interrupt Raw Status 1 RegisterInterrupt Status 0 Register Reserved LockInterrupt Status 1 Register Interrupt Mask 0 Register Interrupt Mask 1 Register Subaddress F5h Default 00hInterrupt Clear 0 Register Interrupt Clear 1 Register Subaddress F7h Default 00hSubaddress Byte Vbus Register DefinitionsVDP Closed Caption Data Register VDP WSS Data RegisterVDP V-Chip TV Rating Block 1 Register VDP Vitc Data RegisterVDP V-Chip TV Rating Block 2 Register TV-PG VDP V-Chip TV Rating Block 3 RegisterVDP V-CHIP Mpaa Rating Data Register NoneDefault line mode = FFh, address = 00h VDP General Line Mode and Line Address RegisterVPS Read only VDP VPS/Gemstar Data RegisterAnalog Output Control 2 Register Interrupt Configuration RegisterRecommended Operating Conditions Crystal SpecificationsCrystal Specifications MIN NOM MAX Unit Absolute Maximum Ratings†Parameter Test Conditions MIN TYP MAX Unit Electrical CharacteristicsDC Electrical Characteristics see Note Analog Processing and A/D ConvertersVC1 SDA VC0 SCL TimingDataclk AVID, VS, HS, FID VOH VOLElectrical Specifications Example Recommended SettingsAssumptions Assumptions Example Register Settings Example Register Settings −1. Example Application Circuit Application ExampleDesigning With PowerPADt Devices MSL Peak Temp Orderable Device Status Package Pins Package Eco PlanQty Page

TVP5147M1PFP specifications

The Texas Instruments TVP5147M1PFP is a versatile video decoder that stands out in the realm of analog video processing. This device is particularly designed for high-quality video applications, making it an excellent choice for a variety of consumer and professional electronics that require reliable video decoding capabilities.

One of the main features of the TVP5147 is its ability to decode multiple video formats, including NTSC, PAL, and SECAM. This flexibility allows the decoder to seamlessly interface with various video sources from different geographic regions, providing a global solution for video applications. The TVP5147 includes advanced synchronization features, ensuring it can effectively handle video signals that may vary in timing and quality.

The device is equipped with a sophisticated 10-bit analog-to-digital converter (ADC), which enhances the precision and clarity of the digital video output. This high-resolution capability allows for improved color accuracy and detail, leading to a more lifelike video representation. Additionally, the TVP5147 utilizes advanced digital processing technologies, including noise reduction and image enhancement features, contributing to outstanding image quality even in less than ideal input conditions.

Another notable characteristic of the TVP5147M1PFP is its support for various output formats, including ITU-R BT.601 and 656, which facilitates easy integration into different systems. The device can also provide various output resolutions, catering to the needs of diverse applications ranging from standard definition to high definition displays.

In terms of connectivity, the TVP5147 offers multiple input options, including composite video, S-video, and component video interfaces. This versatility ensures that it can accommodate a wide range of video sources, from traditional VHS players to modern digital cameras. Furthermore, the integrated video control features allow for easy adjustment of parameters such as brightness, contrast, and saturation.

The power consumption of the TVP5147M1PFP is optimized for low-energy applications while maintaining high performance, making it suitable for battery-powered devices and energy-efficient designs. Overall, the Texas Instruments TVP5147M1PFP is an exceptional video decoder that blends flexibility, high quality, and advanced technology, making it a preferred choice for video processing in numerous consumer and industrial applications. Its combination of features ensures reliable performance and high-quality output, fulfilling the demands of modern multimedia environments.
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