me_epzs.h File Reference

Headerfile for EPZS motion estimation. More...

#include "me_epzs_common.h"

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Functions

int EPZSPelBlockMotionSearch (Macroblock *, MotionVector *, MEBlock *, int, int)

int EPZSPelBlockMotionSearchSubMB (Macroblock *, MotionVector *, MEBlock *, int, int)

int EPZSBiPredBlockMotionSearch (Macroblock *, int, MotionVector *, MotionVector *, MotionVector *, MotionVector *, MEBlock *, int, int, int)

int EPZSSubPelBlockMotionSearch (Macroblock *, MotionVector *, MEBlock *mv_block, int, int *)

int EPZSSubPelBlockSearchBiPred (Macroblock *, MEBlock *mv_block, int list, MotionVector *pred_mv1, MotionVector *pred_mv2, MotionVector *mv1, MotionVector *mv2, int min_mcost, int *lambda_factor)

Detailed Description

Headerfile for EPZS motion estimation.

me_epzs.h

Author:: Alexis Michael Tourapis <alexis.tourapis@dolby.com>

Date:: 11. August 2006

Definition in file me_epzs.h.

Function Documentation

int EPZSBiPredBlockMotionSearch	(	Macroblock *	currMB,
		int	list,
		MotionVector *	pred_mv1,
		MotionVector *	pred_mv2,
		MotionVector *	mv1,
		MotionVector *	mv2,
		MEBlock *	mv_block,
		int	search_range,
		int	min_mcost,
		int	lambda_factor
	)

FAST Motion Estimation using EPZS AMT/HYC.

Returns:: minimum motion cost after search

If p_EPZS->medthres satisfied, then terminate, otherwise generate Predictors

Add Spatial Predictors in predictor list. Scheme adds zero, left, top-left, top, top-right. Note that top-left adds very little in terms of performance and could be removed with little penalty if any.

Check all predictors

Refine using EPZS pattern if needed Note that we are using a conservative threshold method. Threshold could be tested after checking only a certain number of predictors instead of the full set. Code could be easily modified for this task.

Adapt pattern based on different conditions.

center on best predictor

Check Second best predictor with EPZS pattern

Second best. Note that following code is identical as for best predictor.

Parameters:

	currMB	Current Macroblock
	list	reference list
	pred_mv1	motion vector predictor in sub-pel units
	pred_mv2	motion vector predictor in sub-pel units
	mv1	in: search center (x\|y) / out: motion vector (x\|y) - in pel units
	mv2	in: search center (x\|y)
	mv_block	motion vector information
	search_range	1-d search range in pel units
	min_mcost	minimum motion cost (cost for center or huge value)
	lambda_factor	lagrangian parameter for determining motion cost

Definition at line 728 of file me_epzs.c.

References EPZSDetermineStopCriterion(), EPZSSpatialPredictors(), storable_picture::motion, pic_motion_params::mv, macroblock::p_Img, macroblock::p_slice, and pic_motion_params::ref_idx.

Referenced by init_ME_engine().

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int EPZSPelBlockMotionSearch	(	Macroblock *	,
		MotionVector *	,
		MEBlock *	,
		int	,
		int
	)

FAST Motion Estimation using EPZS AMT/HYC.

If p_EPZS->medthres satisfied, then terminate, otherwise generate Predictors Condition could be strengthened by consideration distortion of adjacent partitions.

Add Spatial Predictors in predictor list. Scheme adds zero, left, top-left, top, top-right. Note that top-left adds very little in terms of performance and could be removed with little penalty if any.

Window Size Based Predictors Basically replaces a Hierarchical ME concept and helps escaping local minima, or determining large motion variations. Following predictors can be adjusted further (i.e. removed, conditioned etc) based on distortion, correlation of adjacent MVs, complexity etc. These predictors and their conditioning could also be moved after all other predictors have been tested. Adaptation could also be based on type of material and coding mode (i.e. field/frame coding,MBAFF etc considering the higher dependency with opposite parity field

Blocktype/Reference dependent predictors. Since already mvs for other blocktypes/references have been computed, we can reuse them in order to easier determine the optimal point. Use of predictors could depend on cost,

Check all predictors

Refine using EPZS pattern if needed Note that we are using a conservative threshold method. Threshold could be tested after checking only a certain number of predictors instead of the full set. Code could be easily modified for this task.

Adapt pattern based on different conditions.

center on best predictor

Check Second best predictor with EPZS pattern

Second best. Note that following code is identical as for best predictor.

Definition at line 42 of file me_epzs.c.

References EPZSBlockTypePredictorsMB(), EPZSDetermineStopCriterion(), EPZSSpatialMemPredictors(), EPZSSpatialPredictors(), EPZSTemporalPredictors(), EPZSWindowPredictors(), macroblock::mbAddrX, storable_picture::motion, pic_motion_params::mv, macroblock::p_Img, macroblock::p_slice, pic_motion_params::ref_idx, and slice::slice_type.

Referenced by init_ME_engine(), PartitionMotionSearch(), and SubPartitionMotionSearch().

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int EPZSPelBlockMotionSearchSubMB	(	Macroblock *	,
		MotionVector *	,
		MEBlock *	,
		int	,
		int
	)

FAST Motion Estimation using EPZS AMT/HYC.

If p_EPZS->medthres satisfied, then terminate, otherwise generate Predictors Condition could be strengthened by consideration distortion of adjacent partitions.

Add Spatial Predictors in predictor list. Scheme adds zero, left, top-left, top, top-right. Note that top-left adds very little in terms of performance and could be removed with little penalty if any.

Blocktype/Reference dependent predictors. Since already mvs for other blocktypes/references have been computed, we can reuse them in order to easier determine the optimal point. Use of predictors could depend on cost,

Check all predictors

Refine using EPZS pattern if needed Note that we are using a conservative threshold method. Threshold could be tested after checking only a certain number of predictors instead of the full set. Code could be easily modified for this task.

Adapt pattern based on different conditions.

center on best predictor

Check Second best predictor with EPZS pattern

Now consider second best.

Definition at line 394 of file me_epzs.c.

References EPZSBlockTypePredictors(), EPZSDetermineStopCriterion(), EPZSSpatialMemPredictors(), EPZSSpatialPredictors(), macroblock::mbAddrX, storable_picture::motion, pic_motion_params::mv, macroblock::p_Img, macroblock::p_slice, pic_motion_params::ref_idx, and slice::slice_type.

Referenced by SubPartitionMotionSearch().

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int EPZSSubPelBlockMotionSearch	(	Macroblock *	,
		MotionVector *	,
		MEBlock *	mv_block,
		int	,
		int *
	)

Fast sub pixel block motion search to support EPZS.

Definition at line 40 of file me_epzs_sub.c.

References H_PEL, macroblock::p_Img, macroblock::p_slice, Q_PEL, img_par::start_me_refinement_hp, and img_par::start_me_refinement_qp.

Referenced by init_ME_engine().

int EPZSSubPelBlockSearchBiPred	(	Macroblock *	,
		MEBlock *	mv_block,
		int	list,
		MotionVector *	pred_mv1,
		MotionVector *	pred_mv2,
		MotionVector *	mv1,
		MotionVector *	mv2,
		int	min_mcost,
		int *	lambda_factor
	)

Fast bipred sub pixel block motion search to support EPZS.

Definition at line 319 of file me_epzs_sub.c.

References H_PEL, img_par::mb_data, macroblock::p_Img, Q_PEL, img_par::start_me_refinement_hp, and img_par::start_me_refinement_qp.

Referenced by init_ME_engine().


Functions
int	EPZSPelBlockMotionSearch (Macroblock , MotionVector , MEBlock *, int, int)
int	EPZSPelBlockMotionSearchSubMB (Macroblock , MotionVector , MEBlock *, int, int)
int	EPZSBiPredBlockMotionSearch (Macroblock , int, MotionVector , MotionVector , MotionVector , MotionVector , MEBlock , int, int, int)
int	EPZSSubPelBlockMotionSearch (Macroblock , MotionVector , MEBlock mv_block, int, int )
int	EPZSSubPelBlockSearchBiPred (Macroblock , MEBlock mv_block, int list, MotionVector pred_mv1, MotionVector pred_mv2, MotionVector mv1, MotionVector mv2, int min_mcost, int *lambda_factor)