diff --git a/codec/encoder/core/inc/svc_enc_frame.h b/codec/encoder/core/inc/svc_enc_frame.h
index 7234fc19..b0221769 100644
--- a/codec/encoder/core/inc/svc_enc_frame.h
+++ b/codec/encoder/core/inc/svc_enc_frame.h
@@ -103,7 +103,7 @@ struct TagDqLayer {
 
   SPicture*				pRefPic;			// reference picture pointer
   SPicture*				pDecPic;			// reconstruction picture pointer for layer
-  SPicture*       pRefOri;
+  SPicture*       pRefOri[MAX_REF_PIC_COUNT];
 
   SSliceCtx*			pSliceEncCtx;	// current slice context
 
diff --git a/codec/encoder/core/inc/wels_preprocess.h b/codec/encoder/core/inc/wels_preprocess.h
index 9390fd9e..68e4ca85 100644
--- a/codec/encoder/core/inc/wels_preprocess.h
+++ b/codec/encoder/core/inc/wels_preprocess.h
@@ -126,7 +126,7 @@ class CWelsPreProcess {
   int32_t AnalyzeSpatialPic (sWelsEncCtx* pEncCtx, const int32_t kiDIdx);
   int32_t UpdateSpatialPictures (sWelsEncCtx* pEncCtx, SWelsSvcCodingParam* pParam, const int8_t iCurTid,
                                  const int32_t d_idx);
-  int32_t GetRefCandidateLtrIndex (int32_t iRefIdx);
+  int32_t GetRefFrameInfo (int32_t iRefIdx,SPicture *&pRefOri);
   void    AnalyzePictureComplexity (sWelsEncCtx* pCtx, SPicture* pCurPicture, SPicture* pRefPicture,
                                     const int32_t kiDependencyId, const bool kbCalculateBGD);
 
diff --git a/codec/encoder/core/src/ref_list_mgr_svc.cpp b/codec/encoder/core/src/ref_list_mgr_svc.cpp
index 04c2a209..192cea2f 100644
--- a/codec/encoder/core/src/ref_list_mgr_svc.cpp
+++ b/codec/encoder/core/src/ref_list_mgr_svc.cpp
@@ -763,12 +763,14 @@ bool WelsBuildRefListScreen (void* pEncCtx, const int32_t iPOC, int32_t iBestLtr
 
   if (pCtx->eSliceType != I_SLICE) {
     int iLtrRefIdx = 0;
+    SPicture *pRefOri = NULL;
     for (int idx = 0; idx < pVaaExt->iNumOfAvailableRef; idx++) {
-      iLtrRefIdx = pCtx->pVpp->GetRefCandidateLtrIndex (idx);
+      iLtrRefIdx = pCtx->pVpp->GetRefFrameInfo(idx,pRefOri);
       if (iLtrRefIdx >= 0 && iLtrRefIdx <= pParam->iLTRRefNum) {
         SPicture* pRefPic = pRefList->pLongRefList[iLtrRefIdx];
         if (pRefPic != NULL && pRefPic->bUsedAsRef && pRefPic->bIsLongRef) {
           if (pRefPic->uiTemporalId <= pCtx->uiTemporalId && (!pCtx->bCurFrameMarkedAsSceneLtr || pRefPic->bIsSceneLTR)) {
+            pCtx->pCurDqLayer->pRefOri[pCtx->iNumRef0] = pRefOri;
             pCtx->pRefList0[pCtx->iNumRef0++] = pRefPic;
             WelsLog (pCtx, WELS_LOG_INFO,
                      "WelsBuildRefListScreen(), ref !current iFrameNum = %d, ref iFrameNum = %d,LTR number = %d,iNumRef = %d ref is Scene LTR = %d\n",
@@ -785,6 +787,7 @@ bool WelsBuildRefListScreen (void* pEncCtx, const int32_t iPOC, int32_t iBestLtr
             continue;
           } else if (pRefList->pLongRefList[i]->uiTemporalId == 0
                      || pRefList->pLongRefList[i]->uiTemporalId < pCtx->uiTemporalId)	{
+            pCtx->pCurDqLayer->pRefOri[pCtx->iNumRef0] = pRefOri;
             pCtx->pRefList0[pCtx->iNumRef0++] = pRefList->pLongRefList[i];
             WelsLog (pCtx, WELS_LOG_INFO,
                      "WelsBuildRefListScreen(), ref !current iFrameNum = %d, ref iFrameNum = %d,LTR number = %d\n",
diff --git a/codec/encoder/core/src/svc_mode_decision.cpp b/codec/encoder/core/src/svc_mode_decision.cpp
index 5cf4de84..ee99b621 100644
--- a/codec/encoder/core/src/svc_mode_decision.cpp
+++ b/codec/encoder/core/src/svc_mode_decision.cpp
@@ -194,7 +194,7 @@ bool JudgeStaticSkip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, SWe
   if (bTryStaticSkip) {
     int32_t iStrideUV, iOffsetUV;
     SWelsFuncPtrList* pFunc = pEncCtx->pFuncList;
-    SPicture* pRefOri = pCurDqLayer->pRefOri;
+    SPicture* pRefOri = pCurDqLayer->pRefOri[0];
     if (pRefOri != NULL) {
       iStrideUV	= pCurDqLayer->iEncStride[1];
       iOffsetUV	= (kiMbX + kiMbY * iStrideUV) << 3;
@@ -229,7 +229,7 @@ bool JudgeScrollSkip (sWelsEncCtx* pEncCtx, SMB* pCurMb, SMbCache* pMbCache, SWe
   if (bTryScrollSkip) {
     int32_t iStrideUV, iOffsetUV;
     SWelsFuncPtrList* pFunc = pEncCtx->pFuncList;
-    SPicture* pRefOri = pCurDqLayer->pRefOri;
+    SPicture* pRefOri = pCurDqLayer->pRefOri[0];
     if (pRefOri != NULL) {
       int32_t iScrollMvX = pVaaExt->sScrollDetectInfo.iScrollMvX;
       int32_t iScrollMvY = pVaaExt->sScrollDetectInfo.iScrollMvY;
diff --git a/codec/encoder/core/src/wels_preprocess.cpp b/codec/encoder/core/src/wels_preprocess.cpp
index d9f2f0ae..1d3e01bb 100644
--- a/codec/encoder/core/src/wels_preprocess.cpp
+++ b/codec/encoder/core/src/wels_preprocess.cpp
@@ -1078,11 +1078,12 @@ ESceneChangeIdc CWelsPreProcess::DetectSceneChangeScreen (sWelsEncCtx* pCtx, SPi
   return static_cast<ESceneChangeIdc> (iVaaFrameSceneChangeIdc);
 }
 
-int32_t CWelsPreProcess::GetRefCandidateLtrIndex (int32_t iRefIdx) {
+int32_t CWelsPreProcess::GetRefFrameInfo(int32_t iRefIdx,SPicture *&pRefOri) {
   const int32_t iTargetDid = m_pEncCtx->pSvcParam->iSpatialLayerNum - 1;
   SVAAFrameInfoExt* pVaaExt			= static_cast<SVAAFrameInfoExt*> (m_pEncCtx->pVaa);
   SRefInfoParam* BestRefCandidateParam = & (pVaaExt->sVaaStrBestRefCandidate[iRefIdx]);
   int32_t iLtrRefIdx = m_pSpatialPic[iTargetDid][BestRefCandidateParam->iSrcListIdx]->iLongTermPicNum;
+  pRefOri = m_pSpatialPic[iTargetDid][BestRefCandidateParam->iSrcListIdx];
   return iLtrRefIdx;
 }
 void  CWelsPreProcess::Padding (uint8_t* pSrcY, uint8_t* pSrcU, uint8_t* pSrcV, int32_t iStrideY, int32_t iStrideUV,