diff --git a/libavcodec/mpeg12data.h b/libavcodec/mpeg12data.h
index f397c4a175..4f6a95b799 100644
--- a/libavcodec/mpeg12data.h
+++ b/libavcodec/mpeg12data.h
@@ -2,7 +2,7 @@
  * MPEG1/2 tables
  */
 
-const UINT8 default_intra_matrix[64] = {
+INT16 default_intra_matrix[64] = {
 	8, 16, 19, 22, 26, 27, 29, 34,
 	16, 16, 22, 24, 27, 29, 34, 37,
 	19, 22, 26, 27, 29, 34, 34, 38,
@@ -13,7 +13,7 @@ const UINT8 default_intra_matrix[64] = {
 	27, 29, 35, 38, 46, 56, 69, 83
 };
 
-const UINT8 default_non_intra_matrix[64] = {
+INT16 default_non_intra_matrix[64] = {
     16, 16, 16, 16, 16, 16, 16, 16,
     16, 16, 16, 16, 16, 16, 16, 16,
     16, 16, 16, 16, 16, 16, 16, 16,
@@ -331,18 +331,6 @@ static const UINT8 mbMotionVectorTable[17][2] = {
 { 0xc, 10 },
 };
 
-//const 
-UINT8 zigzag_direct[64] = {
-    0, 1, 8, 16, 9, 2, 3, 10,
-    17, 24, 32, 25, 18, 11, 4, 5,
-    12, 19, 26, 33, 40, 48, 41, 34,
-    27, 20, 13, 6, 7, 14, 21, 28,
-    35, 42, 49, 56, 57, 50, 43, 36,
-    29, 22, 15, 23, 30, 37, 44, 51,
-    58, 59, 52, 45, 38, 31, 39, 46,
-    53, 60, 61, 54, 47, 55, 62, 63
-};
-
 static const int frame_rate_tab[9] = {
     0, 
     (int)(23.976 * FRAME_RATE_BASE), 
diff --git a/libavcodec/mpeg4data.h b/libavcodec/mpeg4data.h
index 54b93d97ed..3821a591ca 100644
--- a/libavcodec/mpeg4data.h
+++ b/libavcodec/mpeg4data.h
@@ -81,26 +81,3 @@ static RLTable rl_intra = {
     intra_run,
     intra_level,
 };
-
-/* alternate scan orders used when doing AC prediction */
-UINT8 ff_alternate_horizontal_scan[64] = {
-    0,  1,  2,  3,  8,  9, 16, 17, 
-    10, 11,  4,  5,  6,  7, 15, 14,
-    13, 12, 19, 18, 24, 25, 32, 33, 
-    26, 27, 20, 21, 22, 23, 28, 29,
-    30, 31, 34, 35, 40, 41, 48, 49, 
-    42, 43, 36, 37, 38, 39, 44, 45,
-    46, 47, 50, 51, 56, 57, 58, 59, 
-    52, 53, 54, 55, 60, 61, 62, 63,
-};
-
-UINT8 ff_alternate_vertical_scan[64] = {
-    0,  8, 16, 24,  1,  9,  2, 10, 
-    17, 25, 32, 40, 48, 56, 57, 49,
-    41, 33, 26, 18,  3, 11,  4, 12, 
-    19, 27, 34, 42, 50, 58, 35, 43,
-    51, 59, 20, 28,  5, 13,  6, 14, 
-    21, 29, 36, 44, 52, 60, 37, 45,
-    53, 61, 22, 30,  7, 15, 23, 31, 
-    38, 46, 54, 62, 39, 47, 55, 63,
-};