diff --git a/codec/api/svc/codec_api.h b/codec/api/svc/codec_api.h
index 47582dfe..9f8bfd2d 100644
--- a/codec/api/svc/codec_api.h
+++ b/codec/api/svc/codec_api.h
@@ -94,7 +94,7 @@ class ISVCEncoder {
 
 class ISVCDecoder {
  public:
-  virtual long EXTAPI Initialize (void* pParam, const INIT_TYPE iInitType) = 0;
+  virtual long EXTAPI Initialize (void* pParam) = 0;
   virtual long EXTAPI Uninitialize() = 0;
 
   virtual DECODING_STATE EXTAPI DecodeFrame (const unsigned char* pSrc,
@@ -162,7 +162,7 @@ struct ISVCEncoderVtbl {
 typedef struct ISVCDecoderVtbl ISVCDecoderVtbl;
 typedef const ISVCDecoderVtbl* ISVCDecoder;
 struct ISVCDecoderVtbl {
-  long (*Initialize) (ISVCDecoder*, void* pParam, const INIT_TYPE iInitType);
+  long (*Initialize) (ISVCDecoder*, void* pParam);
   long (*Uninitialize) (ISVCDecoder*);
 
   DECODING_STATE (*DecodeFrame) (ISVCDecoder*, const unsigned char* pSrc,
diff --git a/codec/console/dec/src/h264dec.cpp b/codec/console/dec/src/h264dec.cpp
index fbcaf546..ccfbd964 100644
--- a/codec/console/dec/src/h264dec.cpp
+++ b/codec/console/dec/src/h264dec.cpp
@@ -408,7 +408,7 @@ int32_t main (int32_t iArgC, char* pArgV[]) {
     return 1;
   }
 
-  if (pDecoder->Initialize (&sDecParam, INIT_TYPE_PARAMETER_BASED)) {
+  if (pDecoder->Initialize (&sDecParam)) {
     printf ("Decoder initialization failed.\n");
     return 1;
   }
diff --git a/codec/decoder/plus/inc/welsDecoderExt.h b/codec/decoder/plus/inc/welsDecoderExt.h
index 908d0793..8ffc7c33 100644
--- a/codec/decoder/plus/inc/welsDecoderExt.h
+++ b/codec/decoder/plus/inc/welsDecoderExt.h
@@ -59,7 +59,7 @@ class CWelsDecoder : public ISVCDecoder {
 CWelsDecoder (void);
 virtual ~CWelsDecoder();
 
-virtual long EXTAPI Initialize (void* pParam, const INIT_TYPE keInitType);
+virtual long EXTAPI Initialize (void* pParam);
 virtual long EXTAPI Uninitialize();
 
 /***************************************************************************
diff --git a/codec/decoder/plus/src/welsDecoderExt.cpp b/codec/decoder/plus/src/welsDecoderExt.cpp
index 1f7f015d..e09cd9f1 100644
--- a/codec/decoder/plus/src/welsDecoderExt.cpp
+++ b/codec/decoder/plus/src/welsDecoderExt.cpp
@@ -186,8 +186,8 @@ CWelsDecoder::~CWelsDecoder() {
   }
 }
 
-long CWelsDecoder::Initialize (void* pParam, const INIT_TYPE keInitType) {
-  if (pParam == NULL || keInitType != INIT_TYPE_PARAMETER_BASED) {
+long CWelsDecoder::Initialize (void* pParam) {
+  if (pParam == NULL) {
     IWelsTrace::WelsVTrace (m_pTrace, IWelsTrace::WELS_LOG_INFO, "CWelsDecoder::Initialize(), invalid input argument.");
     return cmInitParaError;
   }
diff --git a/test/BaseDecoderTest.cpp b/test/BaseDecoderTest.cpp
index bb2c63ea..b5993e93 100644
--- a/test/BaseDecoderTest.cpp
+++ b/test/BaseDecoderTest.cpp
@@ -58,7 +58,7 @@ void BaseDecoderTest::SetUp() {
   decParam.uiEcActiveFlag  = 1;
   decParam.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_DEFAULT;
 
-  rv = decoder_->Initialize(&decParam, INIT_TYPE_PARAMETER_BASED);
+  rv = decoder_->Initialize(&decParam);
   ASSERT_EQ(0, rv);
 }
 
diff --git a/test/cpp_interface_test.cpp b/test/cpp_interface_test.cpp
index 22c00b4e..e89dd7b1 100644
--- a/test/cpp_interface_test.cpp
+++ b/test/cpp_interface_test.cpp
@@ -70,7 +70,7 @@ struct SVCEncoderImpl : public ISVCEncoder {
 
 struct SVCDecoderImpl : public ISVCDecoder {
   virtual ~SVCDecoderImpl() {}
-  virtual long EXTAPI Initialize(void* pParam, const INIT_TYPE iInitType) {
+  virtual long EXTAPI Initialize(void* pParam) {
     EXPECT_TRUE(gThis == this);
     return 1;
   }