Texas Instruments TVP5147M1PFP manual Luminance Processing, Color Transient Improvement, Out

Page 22

Functional Description

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. A peaking filter (edge enhancer) amplifies high-frequency components of the luminance signal. Figure 2−9 shows the characteristics of the peaking filter at four different gain settings that are user-programmable via the I2C interface.

 

 

 

Gain

 

 

 

IN

Peak

Bandpass

⋅

Peaking

 

 

Detector

Filter

Filter

 

 

 

 

 

 

 

 

 

 

Delay

+

OUT

Figure 2−8. Luminance Edge-Enhancer Peaking Block Diagram

 

7

 

 

 

 

Peak at

 

 

 

 

 

 

 

 

 

6

 

 

 

 

f = 2.64 MHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gain = 2

 

 

 

5

 

 

 

 

 

 

 

− dB

4

 

 

 

 

Gain = 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amplitude

3

 

 

 

 

Gain = 0.5

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

−1

 

 

 

 

Gain = 0

 

 

 

 

 

 

 

 

 

 

 

0

1

2

3

4

5

6

7

 

 

 

f − Frequency − MHz

 

 

Figure 2−9. Peaking Filter Response,

NTSC/PAL ITU-R BT.601 Sampling

2.2.4 Color Transient Improvement

Color transient improvement (CTI) enhances horizontal color transients. The color difference signal transition points are maintained, but the edges are enhanced for signals which have bandwidth-limited color components.

14

TVP5147M1PFP

SLES140A—March 2007

Page 21 Page 23
Image 22
Page 21 Page 23
Contents Data Manual Important Notice Contents Section 11.11 Section 11.59 Example List of Illustrations List of Tables Introduction Detailed Functionality Ordering Information TVP5147M1 ApplicationsRelated Products Packaged DevicesFunctional Block Diagram Terminal Assignments PFP Package TOP View−1. Terminal Functions Miscellaneous SignalsTerminal Functions Terminal Description Name NumberSync Signals VS/VBLK/GPIOIntroduction PGA Video Input Switch ControlAnalog Processing and A/D Converters ADCAnalog Video Output Analog Input ClampingAutomatic Gain Control 5 A/D Converters1 2⋅ Decimation Filter Digital Video ProcessingComposite Processor NTSC/PAL CVBS/C−50 −60 −70 −10 − dB −20−30 −40 −10Color Transient Improvement Luminance ProcessingOUT Real-Time Control RTC Clock CircuitsOutput Formatter Terminal Separate Syncs−1. Output Format Name NumberFID Vblk Line 525 First Field Video VS StartVblk Start 622 623 624 625 First Field Video VS Start Vblk Start 23 24 Vblk Stop 336 337Horizontal Blanking Cb0 Cr0 HS Start HS Stop Avid Stop Dataclk = 2⋅ Pixel Clock ModeAvid Start −15. Horizontal Synchronization Signals for 20-Bit 422 Mode Avid Stop Dataclk = 1⋅ Pixel Clock Mode−3. EAV and SAV Sequence Embedded SyncsI2C Host Interface D9 MSB2 I2C Operation Reset and I2C Bus Address SelectionVbus Access −4. I 2C Host Interface Terminal DescriptionVbus HostI2C WSS Vitc−6. Supported VBI System VBI Data ProcessorVBI System Standard Line Number Number of Bytes Byte Description VBI Fifo and Ancillary Data in Video Stream−7. Ancillary Data Format and Sequence LSBVBI Raw Data Output Reset and Initialization−9. Reset Sequence −8. VBI Raw Data Output FormatInternal Control Registers Adjusting External SyncsRegister Name 2C Subaddress Default −10. I 2C Register SummaryVblk start line V bit control 75h 12h VCR trick mode control 76h −11. Vbus Register Summary Register Definitions −12. Analog Channel and Video Mode SelectionMode Inputs Selected Input Select Output HEX Input Select RegisterVideo Standard Register AFE Gain Control RegisterCvbs and S-Video Component Video Autoswitch Mask Register Operation Mode RegisterSubaddress 03h Default 00h Color Killer Register Luminance Processing Control 1 RegisterLuminance Processing Control 3 Register Subaddress 08h Default 02h Reserved Trap filter selectLuminance Processing Control 2 Register Luminance Brightness RegisterChroma Hue Register Luminance Contrast RegisterChrominance Saturation Register Chrominance Processing Control 1 RegisterAvid Start Pixel Register Subaddress 0Eh DefaultChrominance Processing Control 2 Register WCFHsync Stop Pixel Register Avid Stop Pixel RegisterHsync Start Pixel Register Vsync Start Line RegisterVblk Start Line Register CTI Delay RegisterVsync Stop Line Register Vblk Stop Line RegisterCTI Control Register Subaddress 2Eh Default 00h CTI coring CTI gainSync Control Register Output Formatter 2 Register Subaddress 33h Default 40hOutput Formatter 1 Register CbCr code ReservedOutput Formatter 3 Register Output Formatter 4 Register Output Formatter 5 Register Output Formatter 6 Register Subaddress 39h Default 00hClear Lost Lock Detect Register Status 1 Register Read onlyColor killed Status 2 RegisterAGC Gain Status Register Subaddress 3Ch Fine gain 3Dh Coarse gainVideo Standard Status Register Gpio Input 1 RegisterGpio Input 2 Register Glco FIDAFE Coarse Gain for CH 1 Register Subaddress 46h Default 20h Cgain 1 ReservedSubaddress 47h Default 20h Cgain 2 Reserved AFE Coarse Gain for CH 2 RegisterAFE Coarse Gain for CH 3 Register Subaddress 48h Default 20h Cgain 3 ReservedSubaddress 49h Default 20h Cgain 4 Reserved AFE Coarse Gain for CH 4 RegisterAFE Fine Gain for YChroma Register AFE Fine Gain for Pb RegisterAFE Fine Gain for Pr Register Field ID Control Register Subaddress 57h Default 00hAFE Fine Gain for CVBSLuma Register FID controlReg 69h Reg 75h Mode Standard LPF Nonstandard LPF Bit Subaddress 69h Default 00hBit mode Bit and V-bit Control 1 RegisterAGC 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 V Bit Control Register Lines per frame BitHorizontal Shake Increment Register VCR Trick Mode Control RegisterAGC Increment Delay Register AGC Increment Speed RegisterChip ID LSB Register Analog Output Control 1 RegisterChip ID MSB Register Cpll Speed Control RegisterStatus Request Register AGC Decrement Delay RegisterVertical Line Count Register VDP TTX Filter And Mask Registers VDP TTX Filter Control Register Filter VDP Fifo Word Count RegisterNibble PassVDP Fifo Output Control Register VDP Fifo Reset RegisterVDP Fifo Interrupt Threshold Register VDP Line Number Interrupt RegisterVDP Line Start Register VDP Global Line Mode RegisterVDP Pixel Alignment Register VDP Line Stop RegisterVbus Data Access With No Vbus Address Increment Register VDP Full Field Enable RegisterVDP Full Field Mode Register Vbus Data Access With Vbus Address Increment RegisterInterrupt Raw Status 0 Register Vbus Address Access RegisterFifo Read Data Register Fifo Thrs TTX WSS VPS Vitc CC F2 CC F1Reserved Lock Interrupt Raw Status 1 RegisterInterrupt Status 0 Register Fifo fullInterrupt Status 1 Register Interrupt Mask 0 Register Interrupt Mask 1 Register Subaddress F5h Default 00hInterrupt Clear 0 Register Subaddress F7h Default 00h Interrupt Clear 1 RegisterVDP WSS Data Register Vbus Register DefinitionsVDP Closed Caption Data Register Subaddress ByteVDP V-Chip TV Rating Block 1 Register VDP Vitc Data RegisterVDP V-Chip TV Rating Block 2 Register None VDP V-Chip TV Rating Block 3 RegisterVDP V-CHIP Mpaa Rating Data Register TV-PGVDP General Line Mode and Line Address Register Default line mode = FFh, address = 00hVDP VPS/Gemstar Data Register VPS Read onlyInterrupt Configuration Register Analog Output Control 2 RegisterAbsolute Maximum Ratings† Crystal SpecificationsCrystal Specifications MIN NOM MAX Unit Recommended Operating ConditionsAnalog Processing and A/D Converters Electrical CharacteristicsDC Electrical Characteristics see Note Parameter Test Conditions MIN TYP MAX UnitVOH VOL TimingDataclk AVID, VS, HS, FID VC1 SDA VC0 SCLElectrical Specifications Example Recommended SettingsAssumptions Assumptions Example Register Settings Example Register Settings Application Example −1. Example Application CircuitDesigning 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.
Top Page Image Contents