diff -u -r apps/codecs/libtremor/block.c apps/codecs/libtremor/block.c
--- apps/codecs/libtremor/block.c	2009-01-30 20:01:37.000000000 +0900
+++ apps/codecs/libtremor/block.c	2009-02-08 15:34:46.000000000 +0900
@@ -26,6 +26,23 @@
 #include "registry.h"
 #include "misc.h"
 
+/* Define window buffer size on IRAM.
+
+   The PP5024/5022 CPU are not have a penalty of the decode speed
+    by validating this switch in the present conditions.
+
+   Needed IRAM size.
+     Normal                 1024*4 + 128*4 = 4608
+     Large                  2048*4 + 256*4 = 9216
+     Large(_LOW_ACCURACY_)  2048*1 + 256*1 = 2304 (Bytes)
+*/
+#ifdef LIRAM_PP
+#define WINDOW_BUFFER_L      2048
+#define WINDOW_BUFFER_S      256
+static LOOKUP_TNC window_buff_long[WINDOW_BUFFER_L] IBSS_ATTR;
+static LOOKUP_TNC window_buff_short[WINDOW_BUFFER_S] IBSS_ATTR;
+#endif
+
 static int ilog(unsigned int v){
   int ret=0;
   if(v)--v;
@@ -145,6 +162,7 @@
 
 static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){
   int i;
+  long b_size[2];
   codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
   private_state *b=NULL;
 
@@ -155,8 +173,22 @@
   b->modebits=ilog(ci->modes);
 
   /* Vorbis I uses only window type 0 */
-  b->window[0]=_vorbis_window(0,ci->blocksizes[0]/2);
-  b->window[1]=_vorbis_window(0,ci->blocksizes[1]/2);
+  b_size[0]=ci->blocksizes[0]/2;
+  b_size[1]=ci->blocksizes[1]/2;
+  b->window[0]=_vorbis_window(0,b_size[0]);
+  b->window[1]=_vorbis_window(0,b_size[1]);
+  
+#ifdef LIRAM_PP
+  /* If fast internal ram sizes are enough, copy data there. */
+  if(b_size[0] <= WINDOW_BUFFER_S){
+    memcpy(window_buff_short, b->window[0], b_size[0]*sizeof(LOOKUP_TNC));
+    b->window[0]=window_buff_short;
+  }
+  if(b_size[1] <= WINDOW_BUFFER_L){
+    memcpy(window_buff_long, b->window[1], b_size[1]*sizeof(LOOKUP_TNC));
+    b->window[1]=window_buff_long;
+  }
+#endif
 
   /* finish the codebooks */
   if(!ci->fullbooks){
diff -u -r apps/codecs/libtremor/config-tremor.h apps/codecs/libtremor/config-tremor.h
--- apps/codecs/libtremor/config-tremor.h	2009-01-30 20:01:37.000000000 +0900
+++ apps/codecs/libtremor/config-tremor.h	2009-02-08 15:34:42.000000000 +0900
@@ -25,4 +25,14 @@
 #define ICODE_ATTR_TREMOR_NOT_MDCT ICODE_ATTR
 #endif
 
+/* Define CPU of large IRAM */
+#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250)
+#define LARGE_IRAM
+#endif
+
+/* Define CPU of large IRAM (PP Only) */
+#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024)
+#define LIRAM_PP
+#endif
+
 // #define _LOW_ACCURACY_
diff -u -r apps/codecs/libtremor/os_types.h apps/codecs/libtremor/os_types.h
--- apps/codecs/libtremor/os_types.h	2009-01-30 20:01:37.000000000 +0900
+++ apps/codecs/libtremor/os_types.h	2009-02-08 15:34:54.000000000 +0900
@@ -24,10 +24,12 @@
 
 #ifdef _LOW_ACCURACY_
 #  define X(n) (((((n)>>22)+1)>>1) - ((((n)>>22)+1)>>9))
-#  define LOOKUP_T const unsigned char  
+#  define LOOKUP_T const unsigned char
+#  define LOOKUP_TNC unsigned char
 #else
 #  define X(n) (n)
 #  define LOOKUP_T const ogg_int32_t
+#  define LOOKUP_TNC ogg_int32_t
 #endif
 
 /* make it easy on the folks that want to compile the libs with a
diff -u -r apps/codecs/libtremor/synthesis.c apps/codecs/libtremor/synthesis.c
--- apps/codecs/libtremor/synthesis.c	2009-01-30 20:01:37.000000000 +0900
+++ apps/codecs/libtremor/synthesis.c	2009-02-08 15:34:58.000000000 +0900
@@ -25,12 +25,15 @@
 #include "os.h"
 
 
-/* IRAM buffer keep the block pcm data; only for windows size upto 2048
-   for space restrictions. 
-   libVorbis 1.1 Oggenc doesn't use larger windows anyway. */
+/* IRAM buffer keep the block pcm data; only for windows size upto 2048(4096)
+   for space restrictions.  */
 /* max 2 channels on the ihp-1xx (stereo), 2048 samples (2*2048*4=16Kb)  */
-#define IRAM_PCM_END      2048    
-#define CHANNELS          2          
+#ifdef LARGE_IRAM
+#define IRAM_PCM_END      4096
+#else
+#define IRAM_PCM_END      2048
+#endif
+#define CHANNELS          2
 
 static ogg_int32_t *ipcm_vect[CHANNELS] IBSS_ATTR;
 static ogg_int32_t ipcm_buff[CHANNELS*IRAM_PCM_END] IBSS_ATTR LINE_ATTR;
diff -u -r apps/codecs/libtremor/window_lookup.h apps/codecs/libtremor/window_lookup.h
--- apps/codecs/libtremor/window_lookup.h	2009-01-30 20:01:37.000000000 +0900
+++ apps/codecs/libtremor/window_lookup.h	2009-02-08 15:35:06.000000000 +0900
@@ -15,7 +15,6 @@
 
  ********************************************************************/
 
-
 #include "os_types.h"
 
 /* libvorbis currently only use the window sizes 256 and 2048, so only put
@@ -50,8 +49,11 @@
   X(0x7fd2a1fc), X(0x7fe64212), X(0x7ff2bd4c), X(0x7ffa0890),
   X(0x7ffdcf39), X(0x7fff6dac), X(0x7fffed01), X(0x7fffffc4),
 };
-
+#ifdef LIRAM_PP
+static LOOKUP_T vwin256[128] = {
+#else
 static LOOKUP_T vwin256[128] ICONST_ATTR_TREMOR_WINDOW = {
+#endif
   X(0x0001f018), X(0x00117066), X(0x00306e9e), X(0x005ee5f1),
   X(0x009ccf26), X(0x00ea208b), X(0x0146cdea), X(0x01b2c87f),
   X(0x022dfedf), X(0x02b85ced), X(0x0351cbbd), X(0x03fa317f),
@@ -284,7 +286,11 @@
   X(0x7fffffdd), X(0x7ffffff7), X(0x7fffffff), X(0x7fffffff),
 };
 
+#ifdef LIRAM_PP
+static LOOKUP_T vwin2048[1024] = {
+#else
 static LOOKUP_T vwin2048[1024] ICONST_ATTR_TREMOR_WINDOW = {
+#endif
   X(0x000007c0), X(0x000045c4), X(0x0000c1ca), X(0x00017bd3),
   X(0x000273de), X(0x0003a9eb), X(0x00051df9), X(0x0006d007),
   X(0x0008c014), X(0x000aee1e), X(0x000d5a25), X(0x00100428),