6.2. Design Overview

6.2.1. System Architecture

withunderisVPSSthis

• GROUP

VPSSforUserprovidegroup ( GROUP). MaximumCountSeeVPSS_MAX_GRP_NUM Definition, each GROUPtimereuse VPSS Hardware, Hardwaresecondaryprocessingeachgroupsubmit.

• CHANNEL

VPSSgroupChannel. VPSS HardwareprovidemultiplePhysicalChannel, eachChannelhasscaling, Cropetc.Function. throughBindPhysicalChannel, willPhysicalChannelOutputisautoInput, ImagescalingUserSetDestinationresolutionOutput.

• Crop

Crop, is 2: groupCropandPhysicalChannelCrop

− groupCrop, VPSS forInputImageperform Crop.

− PhysicalChannelCrop, VPSS foreachPhysicalChannelOutputImageperform Crop.

• Pixel formatConversion

SupportInputOutputImageDataFormatConversion.

−SupportYUV420 planar, YUV422 planar, RGB planar, RGB packed, BGR packedConversion.

• Scale

scalingforImageperform. PhysicalChannelHorizontal, VerticalMinimumSupport 128 times, MaximumSupport128times.

• Mirror/Flip

Mirrorthat isHorizontalimage Flip that isonunderflip. canUse Mirror + Flip implement 180 Rotation.

• Overlay/Overlayex

VideooverlayRegion, CallRGN for VPSS ChannelOutputImageoverlaybitsFigure, SupportbitsFigure FormatARGB4444, ARGB1555, ARGB8888, 256 LUT(ARGB4444), Font-based.

• fixedangleRotation

CallGDCfor VPSS ChannelOutputImageprocessing. Support90and270fixedangleRotationFunction.

VpssModuleinsysteminPositionas followsFigurethe:

throughCallSYSModuleprovidebindingInterface, VPSSModulecanwithVI/VDECetc.InputModuleperform Bind, willDecodingandSensorDatasendtoVPSSperform processing, canimplementImagescalingandcolorspaceConversionetc.Function. at the same timealsocanthroughbindingInterface, willVPSSModuleprocessingofafterImage, after passing through OSDcombinedsendtoVO/VENCModule, alsoSupport performonesingleDeep Learningbeforeprocessing, Then, willprocessingafterimagesendtoTPUperform Deep Learning.

table6- 1 VPSS Functionlimit

Operating mode	Function
	groupCrop	scaling	ChannelCrop
VI_OFFLINE_VPSS_OFFLINE	Support	Support	Support
VI_OFFLINE_VPSS_ONLINE	Not supported	Support	Support
VI_ONLINE_VPSS_OFFLINE	Support	Support	Support
VI_ONLINE_VPSS_ONLINE	Not supported	Support	Support

Note

Note: When VPSS ONLINEtime, multipleonlycanhastwogroupGRPReceivebeforeendtwosensortoData, NonemethodothernotsamesourceRequirements

6.2.2. Precautions

VPSSDataprocessingflowFigureas followsFigure6-1, hastwogroupINPUT. When singleINPUTUsetime, canhasfourgroupChannelOutput; When twogroupINPUTUsetime, thenfirstgroupINPUTonlyhasonegroupChannelOutput, secondgroupINPUTonlyhasthreegroupChannelOutput.

FigureTable6- 1 CV184xDataflowFigure

CV184x VPSSHardwarespecification