diff --git a/aom/internal/aom_codec_internal.h b/aom/internal/aom_codec_internal.h
index 1660585..d6e3ce9 100644
--- a/aom/internal/aom_codec_internal.h
+++ b/aom/internal/aom_codec_internal.h
@@ -348,8 +348,8 @@
   const char *err_detail;
   aom_codec_flags_t init_flags;
 #if CONFIG_IBP_WEIGHT
-  uint8_t ibp_directional_weights[IBP_WEIGHT_SIZE][IBP_WEIGHT_SIZE]
-                                 [DIR_MODES_0_90];
+  IbpWeightsType ibp_directional_weights[IBP_WEIGHT_SIZE][IBP_WEIGHT_SIZE]
+                                        [DIR_MODES_0_90];
 #else
   uint8_t *ibp_directional_weights[TX_SIZES_ALL][DIR_MODES_0_90];
 #endif  // CONFIG_IBP_WEIGHT
diff --git a/aom_dsp/intrapred.c b/aom_dsp/intrapred.c
index 1dfb7b6..86d4106 100644
--- a/aom_dsp/intrapred.c
+++ b/aom_dsp/intrapred.c
@@ -576,7 +576,7 @@
   for (r = 0; r < len; r++) {
     for (c = 0; c < bw; c++) {
       int val = ROUND_POWER_OF_TWO(
-          above[c] * (256 - weights[r]) + dst[c] * weights[r],
+          above[c] * (IBP_WEIGHT_REF - weights[r]) + dst[c] * weights[r],
           IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
@@ -594,24 +594,33 @@
   uint16_t *orig_dst = dst;
   int len_h = bh >> 2;
   int len_w = bw >> 2;
+  int row_start = 0;
+  int col_start = 0;
+#if CONFIG_FIX_IBP_DC
+  if (bw >= bh)
+    row_start = len_h;
+  else
+    col_start = len_w;
+#endif  // CONFIG_FIX_IBP_DC
   uint8_t weights_index = size_to_weights_index[bh >> 3];
   const uint8_t *weights = ibp_weights[weights_index];
   for (r = 0; r < len_h; r++) {
-    for (c = 0; c < bw; c++) {
+    for (c = col_start; c < bw; c++) {
       int val = ROUND_POWER_OF_TWO(
-          above[c] * (256 - weights[r]) + dst[c] * weights[r],
+          above[c] * (IBP_WEIGHT_REF - weights[r]) + dst[c] * weights[r],
           IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
     dst += stride;
   }
-  dst = orig_dst;
+  dst = orig_dst + row_start * stride;
   weights_index = size_to_weights_index[bw >> 3];
   weights = ibp_weights[weights_index];
-  for (r = 0; r < bh; r++) {
+  for (r = row_start; r < bh; r++) {
     for (c = 0; c < len_w; c++) {
       int val = ROUND_POWER_OF_TWO(
-          left[r] * (256 - weights[c]) + dst[c] * weights[c], IBP_WEIGHT_SHIFT);
+          left[r] * (IBP_WEIGHT_REF - weights[c]) + dst[c] * weights[c],
+          IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
     dst += stride;
@@ -630,7 +639,8 @@
   for (r = 0; r < bh; r++) {
     for (c = 0; c < len; c++) {
       int val = ROUND_POWER_OF_TWO(
-          left[r] * (256 - weights[c]) + dst[c] * weights[c], IBP_WEIGHT_SHIFT);
+          left[r] * (IBP_WEIGHT_REF - weights[c]) + dst[c] * weights[c],
+          IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
     dst += stride;
@@ -649,7 +659,7 @@
   for (r = 0; r < len; r++) {
     for (c = 0; c < bw; c++) {
       int val = ROUND_POWER_OF_TWO(
-          above[c] * (256 - weights[r]) + dst[c] * weights[r],
+          above[c] * (IBP_WEIGHT_REF - weights[r]) + dst[c] * weights[r],
           IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
@@ -666,22 +676,31 @@
   const uint8_t *weights = ibp_weights[weights_index];
   int len_w = bw >> 2;
   int len_h = bh >> 2;
+  int row_start = 0;
+  int col_start = 0;
+#if CONFIG_FIX_IBP_DC
+  if (bw >= bh)
+    row_start = len_h;
+  else
+    col_start = len_w;
+#endif  // CONFIG_FIX_IBP_DC
   for (r = 0; r < len_h; r++) {
-    for (c = 0; c < bw; c++) {
+    for (c = col_start; c < bw; c++) {
       int val = ROUND_POWER_OF_TWO(
-          above[c] * (256 - weights[r]) + dst[c] * weights[r],
+          above[c] * (IBP_WEIGHT_REF - weights[r]) + dst[c] * weights[r],
           IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
     dst += stride;
   }
-  dst = orig_dst;
+  dst = orig_dst + row_start * stride;
   weights_index = size_to_weights_index[bw >> 3];
   weights = ibp_weights[weights_index];
-  for (r = 0; r < bh; r++) {
+  for (r = row_start; r < bh; r++) {
     for (c = 0; c < len_w; c++) {
       int val = ROUND_POWER_OF_TWO(
-          left[r] * (256 - weights[c]) + dst[c] * weights[c], IBP_WEIGHT_SHIFT);
+          left[r] * (IBP_WEIGHT_REF - weights[c]) + dst[c] * weights[c],
+          IBP_WEIGHT_SHIFT);
       dst[c] = val;
     }
     dst += stride;
diff --git a/av1/common/av1_common_int.h b/av1/common/av1_common_int.h
index 2b17325..27b310f 100644
--- a/av1/common/av1_common_int.h
+++ b/av1/common/av1_common_int.h
@@ -1782,8 +1782,8 @@
  * Weights for IBP of directional modes.
  */
 #if CONFIG_IBP_WEIGHT
-  uint8_t ibp_directional_weights[IBP_WEIGHT_SIZE][IBP_WEIGHT_SIZE]
-                                 [DIR_MODES_0_90];
+  IbpWeightsType ibp_directional_weights[IBP_WEIGHT_SIZE][IBP_WEIGHT_SIZE]
+                                        [DIR_MODES_0_90];
 #else
   uint8_t *ibp_directional_weights[TX_SIZES_ALL][DIR_MODES_0_90];
 #endif  // CONFIG_IBP_WEIGHT
@@ -3842,7 +3842,8 @@
 // Generate the weights per pixel position for IBP
 #if CONFIG_IBP_WEIGHT
 static void av1_dr_prediction_z1_info(
-    uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int dy, int mode_idx) {
+    IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int dy,
+    int mode_idx) {
   int32_t r, c, y;
   for (r = 0; r < IBP_WEIGHT_SIZE; ++r) {
     y = dy;
@@ -3948,7 +3949,8 @@
 // Generate weights for IBP of one directional mode
 static INLINE void init_ibp_info_per_mode(
 #if CONFIG_IBP_WEIGHT
-    uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode, int delta
+    IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode,
+    int delta
 #else
     uint8_t *weights[TX_SIZES_ALL][DIR_MODES_0_90], int block_idx, int mode,
     int delta, int txw, int txh, int txw_log2, int txh_log2
@@ -3975,7 +3977,7 @@
 // Generate weights for IBP of directional modes
 static INLINE void init_ibp_info(
 #if CONFIG_IBP_WEIGHT
-    uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90]) {
+    IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90]) {
   for (int r = 0; r < IBP_WEIGHT_SIZE; ++r) {
     for (int c = 0; c < IBP_WEIGHT_SIZE; ++c) {
       for (int m = 0; m < DIR_MODES_0_90; ++m) {
diff --git a/av1/common/av1_rtcd_defs.pl b/av1/common/av1_rtcd_defs.pl
index 883e20a..9e0b50e 100644
--- a/av1/common/av1_rtcd_defs.pl
+++ b/av1/common/av1_rtcd_defs.pl
@@ -301,9 +301,9 @@
 
 if (aom_config("CONFIG_IBP_WEIGHT") eq "yes") {
   add_proto qw / void av1_highbd_ibp_dr_prediction_z1 /,
-      "const uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t* second_pred, ptrdiff_t second_stride, int bw, int bh";
+      "const IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t* second_pred, ptrdiff_t second_stride, int bw, int bh";
   add_proto qw / void av1_highbd_ibp_dr_prediction_z3 /,
-      "const uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t* second_pred, ptrdiff_t second_stride, int bw, int bh";
+      "const IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t* second_pred, ptrdiff_t second_stride, int bw, int bh";
 }
 else {
   add_proto qw / void av1_highbd_ibp_dr_prediction_z1 /,
diff --git a/av1/common/enums.h b/av1/common/enums.h
index 0935a00..e9d8c07 100644
--- a/av1/common/enums.h
+++ b/av1/common/enums.h
@@ -1283,7 +1283,15 @@
 
 #define DIR_MODES_0_90 17
 #define IBP_WEIGHT_SHIFT 8
+#if CONFIG_FIX_IBP_DC
+#define IBP_WEIGHT_MAX 256
+#define IBP_WEIGHT_REF IBP_WEIGHT_MAX
+typedef uint16_t IbpWeightsType;
+#else
 #define IBP_WEIGHT_MAX 255
+typedef uint8_t IbpWeightsType;
+#define IBP_WEIGHT_REF 256
+#endif  // CONFIG_FIX_IBP_DC
 
 /*!\enum Warp projection type
  * \brief This enumeration defines various warp projection type supported
diff --git a/av1/common/reconintra.c b/av1/common/reconintra.c
index b28fd8e..9a427ce 100644
--- a/av1/common/reconintra.c
+++ b/av1/common/reconintra.c
@@ -1417,8 +1417,8 @@
 
 #if CONFIG_IBP_WEIGHT
 void av1_highbd_ibp_dr_prediction_z1_c(
-    const uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx,
-    uint16_t *dst, ptrdiff_t stride, uint16_t *second_pred,
+    const IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90],
+    int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t *second_pred,
     ptrdiff_t second_stride, int bw, int bh) {
   const int col_shift = bw >> (IBP_WEIGHT_SIZE_LOG2 + 1);
   const int row_shift = bh >> (IBP_WEIGHT_SIZE_LOG2 + 1);
@@ -1438,8 +1438,8 @@
 }
 
 void av1_highbd_ibp_dr_prediction_z3_c(
-    const uint8_t weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90], int mode_idx,
-    uint16_t *dst, ptrdiff_t stride, uint16_t *second_pred,
+    const IbpWeightsType weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90],
+    int mode_idx, uint16_t *dst, ptrdiff_t stride, uint16_t *second_pred,
     ptrdiff_t second_stride, int bw, int bh) {
   const int col_shift = bw >> (IBP_WEIGHT_SIZE_LOG2 + 1);
   const int row_shift = bh >> (IBP_WEIGHT_SIZE_LOG2 + 1);
@@ -1506,7 +1506,7 @@
     int n_bottomleft_px, int plane, int is_sb_boundary,
     const int seq_intra_pred_filter_flag, const int seq_ibp_flag,
 #if CONFIG_IBP_WEIGHT
-    const uint8_t ibp_weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90]
+    const IbpWeightsType ibp_weights[][IBP_WEIGHT_SIZE][DIR_MODES_0_90]
 #else
     uint8_t *const ibp_weights[TX_SIZES_ALL][DIR_MODES_0_90]
 #endif  // CONFIG_IBP_WEIGHT
diff --git a/build/cmake/aom_config_defaults.cmake b/build/cmake/aom_config_defaults.cmake
index c102b91..1bb359d 100644
--- a/build/cmake/aom_config_defaults.cmake
+++ b/build/cmake/aom_config_defaults.cmake
@@ -416,6 +416,7 @@
 set_aom_config_var(CONFIG_COEFF_HR_ADAPTIVE 1
                    "AV2 enable adaptive coding of HR coefficients.")
 set_aom_config_var(CONFIG_IBP_WEIGHT 1 "Reduce IBP weights memory.")
+set_aom_config_var(CONFIG_FIX_IBP_DC 1 "Simplify prediction of IBP DC mode.")
 set_aom_config_var(CONFIG_WEDGE_TMVP 1
                    "Improvements to tmvp MV storing for wedge mode.")
 set_aom_config_var(