Manuals / Texas Instruments / Computer Equipment / Computer Drive

Texas Instruments TMS320DM648 4 Y/C Fifo Unpacking, Video Output Filtering, Output Filter Modes

Models: TMS320DM648

1 174

Download 174 pages 10.69 Kb

Page 103

www.ti.com

Video Output Filtering

4.3.4 Y/C FIFO Unpacking

Display data is always packed into the FIFOs in 64-bit words and must be unpacked before being sent to the display data pipeline. By default, data is unpacked from right to left.

The 8-bit Y/C mode uses three FIFOs for color separation. Samples are unpacked as shown in Figure 4-14.

Figure 4-14. 8-Bit Y/C FIFO Unpacking

VCLKOUT

VDOUT[9−2] Y 0 Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 Y 8 Y 9 Y 10 Y 11

VDOUT[19−12] Cb 0 Cr 0 Cb 1 Cr 1 Cb 2 Cr 2 Cb 3 Cr 3 Cb 4 Cr 4 Cb 5 Cr 5

63

5655

4847

4039

3231

2423

1615

8 7

0

Y 31

Y 30

Y 29

Y 28

Y 27

Y 26

Y 25

Y 24

Y 23

Y 22

Y 21

Y 20

Y 19

Y 18

Y 17

Y 16

Y 15

Y 14

Y 13

Y 12

Y 11

Y 10

Y 9

Y 8

Y FIFO

Y 7

Y 6

Y 5

Y 4

Y 3

Y 2

Y 1

Y 0

63

5655

4847

4039

3231

2423

1615

8 7

0

Cb 15

Cb 14

Cb 13

Cb 12

Cb 11

Cb 10

Cb 9

Cb 8

Cb FIFO

Cb 7

Cb 6

Cb 5

Cb 4

Cb 3

Cb 2

Cb 1

Cb 0

63

5655

4847

4039

3231

2423

1615

8 7

0

Cr 15

Cr 14

Cr 13

Cr 12

Cr 11

Cr 10

Cr 9

Cr 8

Cr FIFO

Cr 7

Cr 6

Cr 5

Cr 4

Cr 3

Cr 2

Cr 1

Cr 0

Little-Endian Unpacking

4.4Video Output Filtering

The video output filter performs simple hardware scaling and re-sampling on outgoing 8-bit BT.656 or 8-bit Y/C data. Filtering hardware is disabled during raw data display modes.

4.4.1 Output Filter Modes

The output filter has four modes of operation: no-filtering, 2x scaling, chrominance re-sampling, and 2x scaling with chrominance re-sampling. Filter operation is determined by the DMODE, SCALE, and RESMPL bits of the VDCTL.

Table 4-3shows the output filter mode selection. When 8-bit BT.656 or Y/C display operation is selected, (DMODE = x00), scaling is selected by setting the SCALE bit and chrominance re-sampling is selected by setting the RESMPL bit. If 8-bit BT.656 or Y/C display is not selected (DMODE ≠ x00), filtering is disabled.

Table 4-3. Output Filter Mode Selection

	VDCTL Bit
DMODE	RESMPL	SCALE	Filter Operation
x00	0	0	No filtering
x00	0	1	2x scaling
x00	1	0	Chrominance re-sampling (full scale)
x00	1	1	2x scaling with chrominance re-sampling
x01	x	x	No filtering
x10	x	x	No filtering
x11	x	x	No filtering

SPRUEM1 –May 2007	Video Display Port	103
Submit Documentation Feedback

Image 103

Texas Instruments TMS320DM648 manual 4 Y/C Fifo Unpacking, Video Output Filtering, Output Filter Modes

Contents

Users Guide Submit Documentation Feedback Contents Raw Data Capture Mode BT.656 Image Display Video Display Registers Recommended Values Operational Details List of Figures Bit BT.656 Fifo Unpacking Video Display Event Register Vddispevt List of Tables Video Display Register Recommended Values Notational Conventions About This ManualRelated Documentation From Texas Instruments Related Documentation From Texas Instruments Trademarks Overview Video Port Video Port Block Diagram Edma Interface Video Port FifoBT.656 Video Capture Fifo Configuration Video Capture Fifo ConfigurationsYsrca Y/C Video Capture Fifo Configuration Bit Raw Video Capture Fifo Configuration Video Display Fifo ConfigurationsBit Locked Raw Video Display Fifo Configuration Video Port Registers 10. Y/C Video Display Fifo ConfigurationVideo Display Signal Mapping Video Capture Signal Mapping1Video Port Pin Mapping Vdin Bus Usage for Capture Modes Capture Mode BT.656 Raw Data Data Bus BitVdin Data Bus Usage for Capture Modes1 Vdout Data Bus Usage for Display Modes1 Vdout Data Bus Usage for Display ModesVideo Port Pin Multiplexing VideoPort ClockingVideo Port Software Port Reset Reset OperationPower-On Reset Peripheral Bus ResetDisplay Channel Reset Capture Channel ResetInterrupt Operation Capture Edma Event Generation Edma OperationEdma Size and Threshold Restrictions Display Edma Event GenerationAcronym Register Name Edma Interface OperationVideo Port Control Registers Video Port Control RegistersVideo Port Control Register Vpctl Field Descriptions Video Port Control Register VpctlDescription Operating Mode Video Port Operating Mode SelectionVideo Port Status Register Vpstat Field Descriptions Video Port Status Register VpstatVideo Port Interrupt Enable Register Vpie Lfda DcnaLfda Sfda VINTA2 VINTA1 Serra Ccmpa Covra Video Port Interrupt Status Register VpisVideo Port Interrupt Status Register Vpis Field Descriptions Vdctl None ClearShort field detected on channel a interrupt detected bit Covra Video Capture Port BT.656 and Y/C Mode Field and Frame Operation1 BT.656 Capture Channels Video Capture Mode SelectionBT.656 Video Capture Mode Video Capture Mode SelectionBT.656 Protection Bits Error Correction by Protection BitsVideo Capture Parameters 3 BT.656 Image Window and CaptureVideo Source 4 BT.656 Data Sampling5 BT.656 Fifo Packing Common Video Source Parameters3 Y/C Image Window and Capture Y/C Video Capture Mode1 Y/C Capture Channels 2 Y/C Timing Reference CodesVclkina BT.656 and Y/C Mode Field and Frame Operation4 Y/C Fifo Packing Bit Y/C Fifo PackingOperation BT.656 and Y/C Mode Capture OperationCapture Determination and Notification VC xCTL BitEAV Vertical Counter Reset PointVertical Synchronization Vertical Synchronization ProgrammingVRST=0 VRST=1 FINV=0 FINV=1 Vcount Vcount Operation Example EXC =VCxCTL Bit Horizontal Counter Reset PointHorizontal Synchronization Horizontal Synchronization ProgrammingField Identification Programming Field IdentificationField Detect Method HSYNC# VCTL1 Short and Long Field DetectVideo Input Filtering Vclkin VSYNC# VCTL2Scaling Operation 10. Input Filter Mode SelectionInput Filter Modes Chrominance Re-sampling Operation2 Scaled Co-Sited Filtering Edge Pixel Replication11. Edge Pixel Replication Ancillary Data CaptureRaw Data Capture Notification Raw Data Capture ModeHorizontal Ancillary Hanc Data Capture Vertical Ancillary Vanc Data CaptureRaw Data Fifo Packing 11. Raw Data Mode Capture OperationFrmc TCI Capture Features TCI Capture ModeTCI Data Capture Synchronizing the System Clock TCI Capture Error DetectionPCR Clear Frmc 12. TCI Capture Mode OperationTCI Data Capture Notification Vcactl BitReading from the Fifo Writing to the FifoPerr Psterr Capture Line Boundary Conditions Capturing Video in BT.656 or Y/C ModeCapturing Video in Raw Data Mode Handling Fifo Overrun in BT.656 or Y/C ModeCapturing Data in TCI Capture Mode Handling Fifo Overrun Condition in Raw Data ModeVideo Capture Registers Handling Fifo Overrun Condition in TCI Capture Mode13. Video Capture Control Registers Fsync Frmc F2C F1C Vcypos Video Capture Channel x Status Register VCASTAT, VcbstatVcfld Vcxpos Video Capture Channel a Control Register Vcactl BT.656 or Y/C Mode Raw Data Mode TCI ModeDescription Bit Lfde Sfde Resmpl None ResetRstch Blkcap Rdfe Finv EXC Fldd Vrst Hrst VcenV0EAV Eavsav ExternEavfid FDL V1EAVVideo Capture Channel x Field 1 Start Register VCxSTRT1 Value BT.656 or Y/C Mode Raw Data Mode TCI ModeVideo Capture Channel x Field 1 Stop Register VCxSTOP1 Vcystop Video Capture Channel x Field 2 Start Register VCxSTRT2Vcxstop 26. Video Capture Channel x Field 2 Stop Register VCxSTOP2 Video Capture Channel x Field 2 Stop Register VCxSTOP2Video Capture Channel x Vertical Interrupt Register VCxVINT VCTHRLD1 VCTHRLD2CAPEVTCT1 Video Capture Channel x Event Count Register VCxEVTCTVideo Capture Channel B Control Register Vcbctl CAPEVTCT2Vrst Hrst Vcen 30. Video Capture Channel B Control Register VcbctlSAV or VCTL1 inactive edge Not used TCI Capture Control Register Tcictl BT.656, Y/C Mode, or Raw Data Mode TCI Mode24. TCI Capture Control Register Tcictl Field Descriptions Inpcr TCI Clock Initialization LSB Register TciclkinitlTCI Clock Initialization MSB Register Tciclkinitm Bit Value ModeTCI System Time Clock LSB Register Tcistclkl Pcre Default PcrmTCI System Time Clock MSB Register Tcistclkm Pcre PcrmTCI System Time Clock Compare MSB Register Tcistcmpm TCI System Time Clock Compare LSB Register TcistcmplATC Atcm Value BT.656, Y/C Mode, or Raw Data Mode TCI ModeTCI System Time Clock Compare Mask LSB Register Tcistmskl TCI System Time Clock Compare Mask MSB Register TcistmskmTCI System Time Clock Ticks Interrupt Register Tciticks Value BT.656, Y/C Mode, or Raw Data Mode TCI M odeTickct 35. Video Capture Fifo Registers Function Capture Mode Register BT.656 or Y/C Raw DataVideo Capture Fifo Registers 34. Video Capture Fifo RegistersVideo Display Field and Frame Operation Displaying Video in BT.656 or Y/C ModeVideo Display Registers Recommended Values Image Timing Video Display Mode SelectionVideo Display Mode Selection Dmode Bits Mode DescriptionSmpte 296M Compatible Progressive Scan Display Interlaced Blanking Intervals and Video Areas Progressive Blanking Intervals and Video Area Video Display CountersHorizontal Blanking and Horizontal Sync Timing Port Sync Operation Sync Signal GenerationBT.656 Video Display Mode External Sync OperationFpcount Vclkout Display Timing Reference Codes525/60 Description BT.656 Frame TimingLine Number Line NumberVclkout Blanking Codes3 BT.656 Image Display 4 BT.656 Fifo Unpacking3 Y/C Image Display Y/C Video Display Mode1 Y/C Display Timing Reference Codes 2 Y/C Blanking CodesOutput Filter Modes Output Filter Mode Selection4 Y/C Fifo Unpacking Video Output Filtering2x Co-Sited Scaling 15. Chrominance Re-sampling18. Output Edge Pixel Replication 2x Interspersed ScalingVertical Ancillary Vanc Data Display Raw Data Display ModeAncillary Data Display Horizontal Ancillary Hanc Data DisplayRaw Data Fifo Unpacking Raw Mode RGB Output SupportVdctl Bit Video Display Field and Frame OperationDisplay Determination and Notification Display OperationDisplay Line Boundary Conditions Video Display Event GenerationYfifo Display Timing ExamplesInterlaced BT.656 Timing Example Ipcount =IMGSIZE78Flcount Vclkin Fpcount Ipcount VCTL1 Hblnkac VCTL1 Hsyncac VclkoutFrmwidth = IMGHOFF1 = 112 26. BT.656 Interlaced Display Vertical Timing Example Interlaced Raw Display ExampleIpcount VCTL1 Hblnkab Vclkin FpcountVCTL1 Hsyncab Vclkout 28. Raw Interlaced Display Vertical Timing Example 3 Y/C Progressive Display Example Frmwidth = IMGHOFF1 = Hblnkstart = VCTL1 Hblnkac VCTL1 Hsyncac VclkoutHsyncstart = 1350 Hsyncstop = Flcount EAV Ilcount V F 30. Y/C Progressive Display Vertical Timing ExampleDisplaying Video in BT.656 or Y/C Mode Displaying Video in Raw Data Mode Handling Under-run Condition of the Display Fifo Video Display Status Register Vdstat Video Display RegistersVideo Display Control Registers Video Display Status Register Vdstat Field Descriptions Video Display Control Register VdctlVideo Display Control Register Vdctl Field Descriptions BT.656 and Y/C Mode Raw Data ModeVideo Display Control Register Vdctl Field Descriptions None Flddis Value BT.656 and Y/C Mode Raw Data ModeBlanking None FrmdisFrmwidth Video Display Frame Size Register VdfrmszVideo Display Horizontal Blanking Register Vdhblnk FrmheightField has no effect BT.656 and Y/C Mode Raw Data Mode 31-28 ReservedVBLNKXSTOP1 VBLNKYSTOP1VBLNKXSTART2 VBLNKYSTART2VBLNKXSTOP2 Value BT.656 and Y/C ModeDEFAULT0 VBLNKYSTOP2None Negoff Video Display Field 1 Image Offset Register VDIMGOFF1IMGVOFF1 IMGHOFF1IMGVSIZE1 Video Display Field 1 Image Size Register VDIMGSZ1IMGHSIZE1 IMGVOFF2 Video Display Field 2 Image Offset Register VDIMGOFF2IMGHOFF2 IMGHSIZE2 Video Display Field 2 Image Size Register VDIMGSZ2Video Display Field 1 Timing Register VDFLDT1 IMGVSIZE2FLD2YSTART Video Display Field 2 Timing Register VDFLDT2FLD1YSTART FLD1XSTARTVDTHRLD1 Video Display Threshold Register VdthrldVDTHRLD2 IncpixHsyncstop Video Display Horizontal Synchronization Register VdhsyncHsyncstart VSYNCXSTOP1 VSYNCXSTART1VSYNCYSTART1 VSYNCYSTOP1VSYNCYSTART2 VSYNCXSTART2Crld Video Display Counter Reload Register VdreloadVrld Crld HrldDISPEVT1 Video Display Event Register VddispevtVideo Display Clipping Register Vdclip DISPEVT2Clipchigh Video Display Default Display Value Register VddefvalCrdefval Video Display Vertical Interrupt Register VdvintCrdefval Cbdefval Defval56. Video Display Vertical Interrupt Register Vdvint Video Display Field Bit Register VdfbitVBITSET1 FbitsetFbitclr VBITCLR1VBITSET2 VBITCLR234. Video Display Register Recommended Values Video Display Registers Recommended ValuesRegister Field 525/60 Value 36. Video Display Fifo Registers Function Display ModeVideo Display Fifo Registers 35. Video Display Fifo RegistersGeneral-Purpose I/O Operation Video Port Registers Gpio RegistersOffset Address Acronym Register Name Class Video Port Peripheral Identification Register VppidType Class RevisionStop Video Port Peripheral Control Register PCRPeren Soft Free PerenVideo Port Pin Function Register Pfunc Field Descriptions Video Port Pin Function Register PfuncNormal VDATA0TO9 Normal VDATA10TO19Video Port Pin Direction Register Pdir Field Descriptions Video Port Pin Direction Register PdirVDATA0T32IN VDATA0T32OUT VDATA12TO15IN VDATA12TO15OUTVDATA8TO9IN VDATA8TO9OUT VDATA4TO7IN VDATA4TO7OUTVideo Port Pin Data Input Register Pdin Field Descriptions Video Port Pin Data Input Register PdinPDOUT22 Video Port Pin Data Output Register PdoutVideo Port Pin Data Out Register Pdout Field Descriptions PDOUT9 PDOUT8 PDOUT7 PDOUT6 PDOUT5 PDOUT4 PDOUT3 PDOUT2When writing data, writes to PDOUT20 bit Video Port Pin Data Set Register Pdset Field Descriptions Video Port Pin Data Set Register PdsetVideo Port Pin Data Clear Register Pdclr Field Descriptions Video Port Pin Data Clear Register PdclrPIEN9 PIEN8 PIEN7 PIEN6 PIEN5 PIEN4 PIEN3 PIEN2 Video Port Pin Interrupt Enable Register PienPIEN22 Value Description Video Port Pin Interrupt Polarity Register PipolNone VCTL2INT Video Port Pin Interrupt Status Register PistatPISTAT22 None VCTL3INTPICLR9 PICLR8 PICLR7 PICLR6 PICLR5 PICLR4 PICLR3 PICLR2 Video Port Pin Interrupt Clear Register PiclrPICLR22 Vcxo Interpolated Control Port Interface VIC Port Interface SignalsVIC Port Signal Direction Description OverviewExample Values for Interpolation Rate Operational DetailsVIC Port Registers Enabling VIC PortVIC Port Registers VIC Control Register Vicctl Field Descriptions VIC Control Register VicctlVIC Input Register Vicin Field Descriptions VIC Input Register VicinVicinbits VIC Clock Divider Register Vicdiv Field Descriptions VIC Clock Divider Register VicdivVicclkdiv DSP Products ApplicationsRfid