diff --git a/source/Lib/CommonLib/DepQuant.cpp b/source/Lib/CommonLib/DepQuant.cpp
index 6b1c5e9c7418f31b2d6240b12226d6ddeef8c346..6285a0e025810a96443a00d23f96dc9399e10e07 100644
--- a/source/Lib/CommonLib/DepQuant.cpp
+++ b/source/Lib/CommonLib/DepQuant.cpp
@@ -235,11 +235,11 @@ namespace DQIntern
             NbInfoSbb&     nbSbb  = sId2NbSbb[ scanId ];
             const int      begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
             int            cpos[5];
-            cpos[0] = ( posX < blockWidth -1                         ? ( raster2id[rpos+1           ] - begSbb < groupSize ? raster2id[rpos+1           ] - begSbb : 0 ) : 0 );
-            cpos[1] = ( posX < blockWidth -2                         ? ( raster2id[rpos+2           ] - begSbb < groupSize ? raster2id[rpos+2           ] - begSbb : 0 ) : 0 );
-            cpos[2] = ( posX < blockWidth -1 && posY < blockHeight-1 ? ( raster2id[rpos+1+blockWidth] - begSbb < groupSize ? raster2id[rpos+1+blockWidth] - begSbb : 0 ) : 0 );
-            cpos[3] = ( posY < blockHeight-1                         ? ( raster2id[rpos+  blockWidth] - begSbb < groupSize ? raster2id[rpos+  blockWidth] - begSbb : 0 ) : 0 );
-            cpos[4] = ( posY < blockHeight-2                         ? ( raster2id[rpos+2*blockWidth] - begSbb < groupSize ? raster2id[rpos+2*blockWidth] - begSbb : 0 ) : 0 );
+            cpos[0] = ( posX + 1 < blockWidth                         ? ( raster2id[rpos+1           ] - begSbb < groupSize ? raster2id[rpos+1           ] - begSbb : 0 ) : 0 );
+            cpos[1] = ( posX + 2 < blockWidth                         ? ( raster2id[rpos+2           ] - begSbb < groupSize ? raster2id[rpos+2           ] - begSbb : 0 ) : 0 );
+            cpos[2] = ( posX + 1 < blockWidth && posY + 1 < blockHeight ? ( raster2id[rpos+1+blockWidth] - begSbb < groupSize ? raster2id[rpos+1+blockWidth] - begSbb : 0 ) : 0 );
+            cpos[3] = ( posY + 1 < blockHeight                         ? ( raster2id[rpos+  blockWidth] - begSbb < groupSize ? raster2id[rpos+  blockWidth] - begSbb : 0 ) : 0 );
+            cpos[4] = ( posY + 2 < blockHeight                         ? ( raster2id[rpos+2*blockWidth] - begSbb < groupSize ? raster2id[rpos+2*blockWidth] - begSbb : 0 ) : 0 );
             for( nbSbb.num = 0; true; )
             {
               int nk = -1;
@@ -267,11 +267,11 @@ namespace DQIntern
             NbInfoOut&     nbOut  = sId2NbOut[ scanId ];
             const int      begSbb = scanId - ( scanId & (groupSize-1) ); // first pos in current subblock
             int            cpos[5];
-            cpos[0] = ( posX < blockWidth -1                         ? ( raster2id[rpos+1           ] - begSbb >= groupSize ? raster2id[rpos+1           ] : 0 ) : 0 );
-            cpos[1] = ( posX < blockWidth -2                         ? ( raster2id[rpos+2           ] - begSbb >= groupSize ? raster2id[rpos+2           ] : 0 ) : 0 );
-            cpos[2] = ( posX < blockWidth -1 && posY < blockHeight-1 ? ( raster2id[rpos+1+blockWidth] - begSbb >= groupSize ? raster2id[rpos+1+blockWidth] : 0 ) : 0 );
-            cpos[3] = ( posY < blockHeight-1                         ? ( raster2id[rpos+  blockWidth] - begSbb >= groupSize ? raster2id[rpos+  blockWidth] : 0 ) : 0 );
-            cpos[4] = ( posY < blockHeight-2                         ? ( raster2id[rpos+2*blockWidth] - begSbb >= groupSize ? raster2id[rpos+2*blockWidth] : 0 ) : 0 );
+            cpos[0] = ( posX + 1 < blockWidth                         ? ( raster2id[rpos+1           ] - begSbb >= groupSize ? raster2id[rpos+1           ] : 0 ) : 0 );
+            cpos[1] = ( posX + 2 < blockWidth                         ? ( raster2id[rpos+2           ] - begSbb >= groupSize ? raster2id[rpos+2           ] : 0 ) : 0 );
+            cpos[2] = ( posX + 1 < blockWidth && posY + 1 < blockHeight ? ( raster2id[rpos+1+blockWidth] - begSbb >= groupSize ? raster2id[rpos+1+blockWidth] : 0 ) : 0 );
+            cpos[3] = ( posY + 1 < blockHeight                         ? ( raster2id[rpos+  blockWidth] - begSbb >= groupSize ? raster2id[rpos+  blockWidth] : 0 ) : 0 );
+            cpos[4] = ( posY + 2 < blockHeight                         ? ( raster2id[rpos+2*blockWidth] - begSbb >= groupSize ? raster2id[rpos+2*blockWidth] : 0 ) : 0 );
             for( nbOut.num = 0; true; )
             {
               int nk = -1;