diff --git a/mpp/codec/dec/h264/h264d_api.c b/mpp/codec/dec/h264/h264d_api.c
index 9b7a477e..50d445dd 100644
--- a/mpp/codec/dec/h264/h264d_api.c
+++ b/mpp/codec/dec/h264/h264d_api.c
@@ -539,14 +539,14 @@ MPP_RET h264d_prepare(void *decoder, MppPacket pkt, HalDecTask *task)
         RK_U8 *pdata = p_Inp->in_buf;
         p_Inp->is_nalff = (p_Inp->in_length > 3) && (pdata[0] && pdata[1]);
         if (p_Inp->is_nalff) {
-            (ret = parse_prepare_extra_header(p_Inp, p_Dec->p_Cur));
+            (ret = parse_prepare_avcC_header(p_Inp, p_Dec->p_Cur));
             goto __RETURN;
         }
     }
     H264D_DBG(H264D_DBG_INPUT, "[pkt_in_timeUs] is_avcC=%d, in_pts=%lld, pkt_eos=%d, len=%d, pkt_no=%d",
               p_Inp->is_nalff, p_Inp->in_pts, p_Inp->pkt_eos, p_Inp->in_length, p_Dec->p_Vid->g_framecnt);
     if (p_Inp->is_nalff) {
-        (ret = parse_prepare_extra_data(p_Inp, p_Dec->p_Cur));
+        (ret = parse_prepare_avcC_data(p_Inp, p_Dec->p_Cur));
         task->valid = p_Inp->task_valid;  //!< prepare valid flag
     } else  {
         fwrite_stream_to_file(p_Inp, p_Inp->in_buf, (RK_U32)p_Inp->in_length);
diff --git a/mpp/codec/dec/h264/h264d_parse.c b/mpp/codec/dec/h264/h264d_parse.c
index 2328722f..f0ce5663 100644
--- a/mpp/codec/dec/h264/h264d_parse.c
+++ b/mpp/codec/dec/h264/h264d_parse.c
@@ -681,10 +681,10 @@ __FAILED:
 /*!
 ***********************************************************************
 * \brief
-*    main function for parser extra header
+*    main function for parser avcC header
 ***********************************************************************
 */
-MPP_RET parse_prepare_extra_header(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur)
+MPP_RET parse_prepare_avcC_header(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur)
 {
     RK_S32 i = 0;
     MPP_RET ret = MPP_ERR_UNKNOW;
@@ -746,10 +746,10 @@ __FAILED:
 /*!
 ***********************************************************************
 * \brief
-*    main function for parser extra data
+*    main function for parser avcC data
 ***********************************************************************
 */
-MPP_RET parse_prepare_extra_data(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur)
+MPP_RET parse_prepare_avcC_data(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur)
 {
     MPP_RET ret = MPP_ERR_UNKNOW;
 
diff --git a/mpp/codec/dec/h264/h264d_parse.h b/mpp/codec/dec/h264/h264d_parse.h
index fa77cb3e..4705a22f 100644
--- a/mpp/codec/dec/h264/h264d_parse.h
+++ b/mpp/codec/dec/h264/h264d_parse.h
@@ -34,8 +34,8 @@ MPP_RET close_stream_file(H264dInputCtx_t *p_Inp);
 MPP_RET parse_loop(H264_DecCtx_t *p_Dec);
 MPP_RET parse_prepare(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
 MPP_RET parse_prepare_fast(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
-MPP_RET parse_prepare_extra_header(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
-MPP_RET parse_prepare_extra_data(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
+MPP_RET parse_prepare_avcC_header(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
+MPP_RET parse_prepare_avcC_data(H264dInputCtx_t *p_Inp, H264dCurCtx_t *p_Cur);
 
 #ifdef  __cplusplus
 }