diff --git a/apps/renderer.c b/apps/renderer.c
index 59dbb7571a49f3de8e252fc32b5eda5849d9ecb6..9372ff474b16b1b9f4a40368e65f74884a4ed2a2 100644
--- a/apps/renderer.c
+++ b/apps/renderer.c
@@ -170,6 +170,10 @@ typedef struct
     char customHrtfFilePath[RENDERER_MAX_CLI_ARG_LENGTH];
     char renderConfigFilePath[RENDERER_MAX_CLI_ARG_LENGTH];
     int8_t orientation_tracking;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    int16_t Opt_Headrotation;
+    int16_t Opt_ExternalOrientation;
+#endif
     int16_t nonDiegeticPan;
     float nonDiegeticPanGain;
     IVAS_REND_COMPLEXITY_LEVEL complexityLevel;
@@ -896,7 +900,11 @@ int main(
 
     const int16_t frameSize_smpls = (int16_t) ( ( args.render_framesize ) * args.sampleRate * 5 / ( 1000 ) );
 
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( ( error = IVAS_REND_Open( &hIvasRend, args.sampleRate, args.outConfig.audioConfig, !isEmptyString( args.customHrtfFilePath ), args.nonDiegeticPan, args.nonDiegeticPanGain, args.Opt_Headrotation, args.Opt_ExternalOrientation, (int16_t) args.render_framesize ) ) != IVAS_ERR_OK )
+#else
     if ( ( error = IVAS_REND_Open( &hIvasRend, args.sampleRate, args.outConfig.audioConfig, !isEmptyString( args.customHrtfFilePath ), args.nonDiegeticPan, args.nonDiegeticPanGain, (int16_t) args.render_framesize ) ) != IVAS_ERR_OK )
+#endif
     {
         fprintf( stderr, "\nError opening renderer handle: %s\n", ivas_error_to_string( error ) );
         goto cleanup;
@@ -2652,7 +2660,13 @@ static CmdlnArgs defaultArgs(
     clearString( args.renderConfigFilePath );
     clearString( args.externalOrientationFilePath );
 
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    args.Opt_Headrotation = 0;
+    args.Opt_ExternalOrientation = 0;
+#endif
+
     args.orientation_tracking = IVAS_HEAD_ORIENT_TRK_NONE;
+
     args.nonDiegeticPan = 0;
     args.nonDiegeticPanGain = 0.f;
 
@@ -2744,6 +2758,9 @@ static void parseOption(
             break;
         case CmdLnOptionId_trajFile:
             assert( numOptionValues == 1 );
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+            args->Opt_Headrotation = 1;
+#endif
             strncpy( args->headRotationFilePath, optionValues[0], RENDERER_MAX_CLI_ARG_LENGTH - 1 );
             break;
         case CmdLnOptionId_outputMetadata:
@@ -2764,6 +2781,9 @@ static void parseOption(
             break;
         case CmdLnOptionId_exteriorOrientationFile:
             assert( numOptionValues == 1 );
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+            args->Opt_ExternalOrientation = 1;
+#endif
             strncpy( args->externalOrientationFilePath, optionValues[0], RENDERER_MAX_CLI_ARG_LENGTH - 1 );
             break;
         case CmdLnOptionId_customHrtfFile:
@@ -2897,6 +2917,13 @@ static CmdlnArgs parseCmdlnArgs(
         exit( -1 ); /* Error printout handled by failing function */
     }
 
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( args.outConfig.audioConfig == IVAS_AUDIO_CONFIG_BINAURAL_SPLIT_CODED || args.outConfig.audioConfig == IVAS_AUDIO_CONFIG_BINAURAL_SPLIT_PCM )
+    {
+        args.Opt_Headrotation = 1;
+    }
+#endif
+
     return args;
 }
 
diff --git a/lib_com/options.h b/lib_com/options.h
index faafb029dc7b3a80c4eb6b98a198cdcf3f0e7495..d3451948790fd63ea7fc755ff45596afc066ab53 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -169,7 +169,7 @@
 #define NONBE_1215_FIX_JBM_MAX_SCALING                  /* FhG: issue 1215: Fix assert hit in a specific VoIP decoder config. Caused by integer overflow in max scaling calculation. */
 #define NONBE_FIX_1070_USAN_SEGFAULT_MC_TO_BIN_BTSW_HEADROT   /* fix 1070 USAN: nullptr-with-offset and Segfaults in 7_1_4 to BINAURAL and BINAURAL_ROOM_REVERB decoding with bitrate switching and head rotation*/
 #define FIX_1068_ASAN_IN_MC_2_BINAURAL_ROOM_IR          /* issue 1068 : Memory leak in MC to BINAURAL_ROOM decoding with bitrate switching*/
-#define NONBE_FIX_MC_LFE_LPF                                  /* Dlb: Adding the LFE LPF filter back for MC content. */
+#define NONBE_FIX_MC_LFE_LPF                            /* Dlb: Adding the LFE LPF filter back for MC content. */
 #define FIX_1050_EFAP_ALLOC                             /* FhG: issue 1050: reduction of memory allocated to EFAP handle */
 #define NONBE_FIX_1052_SBA_EXT                          /* Dlb: SBA external output support */
 #define FIX_1082_INSTRUM_FAILED_LC3PLUS                 /* VoiceAge: issue 1082: fix ambiguous syntax in LC3Plus code leading to fails of instrumented builds */
@@ -197,7 +197,8 @@
 #define NONBE_FIX_1141_OSBA_ROOM_RENDERING              /* FhG: Fix for issue 1141: render objects in OSBA decoder with room effect  */
 #define NONBE_1360_LFE_DELAY                            /* Dlb: LFE delay alignment when rendering in CLDFB domain*/
 #define NONBE_1229_FIX_ISM1_DPID                        /* Eri: issue 1229: fix bug causing ISM 1 to use default -dpid instead of the specified one */
-#define NONBE_SVD_OPTIMIZATION
+#define NONBE_SVD_OPTIMIZATION                          /* FhG: port-2211-svd-optimization */
+#define FIX_1135_EXT_RENDERER_HANDLES                   /* VA: issue 1135: Memory usage reduction in external renderer: Allocate only handles that are really needed. */
 #define FIX_1209_SID_SIGNALING                          /* VA: issue 1209: remove dead code in IVAS SID signaling */
 #define FIX_1158_FASTCONV_REVERB_HRTF                   /* Philips: issue 1158: Rendering with FastConv to BINAURAL_ROOM_REVERB uses BRIR convolution instead of HRTF */
 #define NONBE_FIX_1176_OSBA_REVERB_JBM_ASAN_ERROR       /* Ericsson: Issue 1176, fix in TDREND_firfilt for subframes shorter than the filter length */
diff --git a/lib_dec/ivas_stat_dec.h b/lib_dec/ivas_stat_dec.h
index ae12ff552a0747289460e8d1829e0099bba9aa8a..7f1fa9a11c03444b46ab6c17e5aaba727b6dedd6 100644
--- a/lib_dec/ivas_stat_dec.h
+++ b/lib_dec/ivas_stat_dec.h
@@ -999,7 +999,7 @@ typedef struct decoder_config_structure
     int16_t Opt_non_diegetic_pan;                /* indicates diegetic or not */
     float non_diegetic_pan_gain;                 /* non diegetic panning gain*/
     int16_t Opt_AMR_WB;                          /* flag indicating AMR-WB IO mode */
-    int16_t Opt_ExternalOrientation;             /* indiates whether external orientations are used */
+    int16_t Opt_ExternalOrientation;             /* indicates whether external orientations are used */
     int16_t Opt_dpid_on;                         /* indicates whether Directivity pattern option is used */
     int16_t Opt_aeid_on;                         /* indicates whether Acoustic environment option is used */
 #ifdef DEBUGGING
diff --git a/lib_dec/lib_dec.c b/lib_dec/lib_dec.c
index fbb413ab1ee35bd0d44d1268bc21c2a7fc42ab3c..1e14c81fecfcb87fc1f372ab4dad072d658a21ea 100644
--- a/lib_dec/lib_dec.c
+++ b/lib_dec/lib_dec.c
@@ -488,11 +488,12 @@ ivas_error IVAS_DEC_Configure(
         hDecoderConfig->render_framesize = renderFramesize;
     }
 
+#ifndef FIX_1135_EXT_RENDERER_HANDLES
     if ( hDecoderConfig->output_config == IVAS_AUDIO_CONFIG_BINAURAL_SPLIT_CODED || hDecoderConfig->output_config == IVAS_AUDIO_CONFIG_BINAURAL_SPLIT_PCM )
     {
         hDecoderConfig->Opt_Headrotation = TRUE;
     }
-
+#endif
     /* Set decoder parameters to initial values */
     if ( ( error = ivas_init_decoder_front( st_ivas ) ) != IVAS_ERR_OK )
     {
diff --git a/lib_rend/lib_rend.c b/lib_rend/lib_rend.c
index d6e301c6d77e16f47efa0de673710109cb337ad1..4dbf7516876b489926cd97f3a0272c16471ad1ba 100644
--- a/lib_rend/lib_rend.c
+++ b/lib_rend/lib_rend.c
@@ -1108,7 +1108,11 @@ static ivas_error initHeadRotation(
 static void closeHeadRotation(
     IVAS_REND_HANDLE hIvasRend )
 {
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( hIvasRend != NULL && hIvasRend->headRotData.headRotEnabled && hIvasRend->headRotData.hOrientationTracker != NULL )
+#else
     if ( ( hIvasRend != NULL ) && ( hIvasRend->headRotData.hOrientationTracker != NULL ) )
+#endif
     {
         free( hIvasRend->headRotData.hOrientationTracker );
     }
@@ -2761,6 +2765,10 @@ ivas_error IVAS_REND_Open(
     const bool asHrtfBinary,
     const int16_t nonDiegeticPan,
     const float nonDiegeticPanGain,
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    const int16_t Opt_Headrotation,
+    const int16_t Opt_ExternalOrientation,
+#endif
     const int16_t num_subframes )
 {
     int16_t i;
@@ -2815,22 +2823,46 @@ ivas_error IVAS_REND_Open(
     }
 
     /* Initialize headrotation data */
-    if ( ( error = initHeadRotation( hIvasRend ) ) != IVAS_ERR_OK )
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    hIvasRend->headRotData.headRotEnabled = 0;
+    if ( Opt_Headrotation )
     {
-        return error;
+#endif
+        if ( ( error = initHeadRotation( hIvasRend ) ) != IVAS_ERR_OK )
+        {
+            return error;
+        }
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
     }
+#endif
 
     /* Initialize external orientation data */
-    if ( ( error = ivas_external_orientation_open( &( hIvasRend->hExternalOrientationData ), num_subframes ) ) != IVAS_ERR_OK )
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    hIvasRend->hExternalOrientationData = NULL;
+    if ( Opt_ExternalOrientation )
     {
-        return error;
+#endif
+        if ( ( error = ivas_external_orientation_open( &( hIvasRend->hExternalOrientationData ), num_subframes ) ) != IVAS_ERR_OK )
+        {
+            return error;
+        }
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
     }
+#endif
 
     /* Initilize combined orientation data */
-    if ( ( error = ivas_combined_orientation_open( &( hIvasRend->hCombinedOrientationData ), outputSampleRate, num_subframes ) ) != IVAS_ERR_OK )
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    hIvasRend->hCombinedOrientationData = NULL;
+    if ( Opt_Headrotation || Opt_ExternalOrientation )
     {
-        return error;
+#endif
+        if ( ( error = ivas_combined_orientation_open( &( hIvasRend->hCombinedOrientationData ), outputSampleRate, num_subframes ) ) != IVAS_ERR_OK )
+        {
+            return error;
+        }
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
     }
+#endif
 
     /* Initialize EFAP */
     if ( ( error = initEfap( &hIvasRend->efapOutWrapper, outConfig, &hIvasRend->customLsOut ) ) != IVAS_ERR_OK )
@@ -2938,10 +2970,18 @@ ivas_error IVAS_REND_Open(
             return error;
         }
     }
-    if ( ( error = ivas_HRTF_statistics_init( &( hIvasRend->hHrtfs.hHrtfStatistics ), hIvasRend->sampleRateOut ) ) != IVAS_ERR_OK )
+
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( outConfig == IVAS_AUDIO_CONFIG_BINAURAL_ROOM_REVERB )
     {
-        return error;
+#endif
+        if ( ( error = ivas_HRTF_statistics_init( &( hIvasRend->hHrtfs.hHrtfStatistics ), hIvasRend->sampleRateOut ) ) != IVAS_ERR_OK )
+        {
+            return error;
+        }
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
     }
+#endif
 
     return IVAS_ERR_OK;
 }
@@ -3866,7 +3906,11 @@ ivas_error IVAS_REND_GetDelay(
     {
         if ( hIvasRend->inputsSba[i].base.inConfig != IVAS_AUDIO_CONFIG_INVALID )
         {
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+            if ( hIvasRend->splitRendWrapper != NULL && hIvasRend->splitRendWrapper->hBinHrSplitPreRend != NULL )
+#else
             if ( hIvasRend->splitRendWrapper->hBinHrSplitPreRend != NULL )
+#endif
             {
                 if ( hIvasRend->hRendererConfig->split_rend_config.rendererSelection == ISAR_SPLIT_REND_RENDERER_SELECTION_FASTCONV )
                 {
@@ -4535,6 +4579,13 @@ ivas_error IVAS_REND_SetOrientationTrackingMode(
     const IVAS_HEAD_ORIENT_TRK_T orientation_tracking /* i  : Head orientation tracking type */
 )
 {
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( hIvasRend->headRotData.headRotEnabled == 0 )
+    {
+        return IVAS_ERR_OK;
+    }
+#endif
+
     return ivas_orient_trk_SetTrackingType( hIvasRend->headRotData.hOrientationTracker, orientation_tracking );
 }
 
@@ -5165,7 +5216,11 @@ static ivas_error renderIsmToBinauralRoom(
 
     hCombinedOrientationData = ismInput->base.ctx.pCombinedOrientationData;
     combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( *hCombinedOrientationData != NULL )
+#else
     if ( hCombinedOrientationData != NULL )
+#endif
     {
         for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
         {
@@ -5780,7 +5835,11 @@ static ivas_error renderMcToBinaural(
 
     hCombinedOrientationData = mcInput->base.ctx.pCombinedOrientationData;
     combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( *hCombinedOrientationData != NULL )
+#else
     if ( hCombinedOrientationData != NULL )
+#endif
     {
         for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
         {
@@ -5870,7 +5929,11 @@ static ivas_error renderMcToBinauralRoom(
 
     hCombinedOrientationData = mcInput->base.ctx.pCombinedOrientationData;
     combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( *hCombinedOrientationData != NULL )
+#else
     if ( hCombinedOrientationData != NULL )
+#endif
     {
         for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
         {
@@ -5962,7 +6025,11 @@ static ivas_error renderMcCustomLsToBinauralRoom(
 
     hCombinedOrientationData = mcInput->base.ctx.pCombinedOrientationData;
     combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( *hCombinedOrientationData != NULL )
+#else
     if ( hCombinedOrientationData != NULL )
+#endif
     {
         for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
         {
@@ -6572,7 +6639,11 @@ static ivas_error renderSbaToBinaural(
 
         hCombinedOrientationData = sbaInput->base.ctx.pCombinedOrientationData;
         combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+        if ( *hCombinedOrientationData != NULL )
+#else
         if ( hCombinedOrientationData != NULL )
+#endif
         {
             for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
             {
@@ -6649,7 +6720,11 @@ static ivas_error renderSbaToBinauralRoom(
 
     hCombinedOrientationData = sbaInput->base.ctx.pCombinedOrientationData;
     combinedOrientationEnabled = 0;
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    if ( *hCombinedOrientationData != NULL )
+#else
     if ( hCombinedOrientationData != NULL )
+#endif
     {
         for ( subframe_idx = 0; subframe_idx < ( *hCombinedOrientationData )->num_subframes; subframe_idx++ )
         {
diff --git a/lib_rend/lib_rend.h b/lib_rend/lib_rend.h
index ea35e99934640692b2502780a48d4e5569ec4e66..eb014f0dc5d10c8393e195ebf6f5d593ce1a9b68 100644
--- a/lib_rend/lib_rend.h
+++ b/lib_rend/lib_rend.h
@@ -113,7 +113,11 @@ ivas_error IVAS_REND_Open(
     const bool asHrtfBinary,                        /* i  : load hrtf binary file                               */ 
    const int16_t nonDiegeticPan,                    /* i  : non-diegetic object flag                            */
    const float nonDiegeticPanGain,                  /* i  : non-diegetic panning gain                           */
-   const int16_t num_subframes                      /* i  : number of subframes                                 */
+#ifdef FIX_1135_EXT_RENDERER_HANDLES
+    const int16_t Opt_Headrotation,                  /* i  : indicates whether head-rotation is used             */
+    const int16_t Opt_ExternalOrientation,           /* i  : indicates whether external orientations are used    */
+#endif 
+    const int16_t num_subframes                      /* i  : number of subframes                                 */
 );
 
 /* Note: this will reset custom LFE routings set for any MC input */