diff --git a/libavcodec/riscv/lpc_init.c b/libavcodec/riscv/lpc_init.c
index c16e5745f0..ab91956f2d 100644
--- a/libavcodec/riscv/lpc_init.c
+++ b/libavcodec/riscv/lpc_init.c
@@ -22,16 +22,22 @@
 
 #include "libavutil/attributes.h"
 #include "libavutil/cpu.h"
+#include "libavutil/riscv/cpu.h"
 #include "libavcodec/lpc.h"
 
 void ff_lpc_apply_welch_window_rvv(const int32_t *, ptrdiff_t, double *);
+void ff_lpc_compute_autocorr_rvv(const double *, ptrdiff_t, int, double *);
 
 av_cold void ff_lpc_init_riscv(LPCContext *c)
 {
 #if HAVE_RVV && (__riscv_xlen >= 64)
     int flags = av_get_cpu_flags();
 
-    if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR))
+    if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
         c->lpc_apply_welch_window = ff_lpc_apply_welch_window_rvv;
+
+        if (ff_get_rv_vlenb() >= c->max_order)
+            c->lpc_compute_autocorr = ff_lpc_compute_autocorr_rvv;
+    }
 #endif
 }
diff --git a/libavcodec/riscv/lpc_rvv.S b/libavcodec/riscv/lpc_rvv.S
index f81a2392c1..d4ea515fee 100644
--- a/libavcodec/riscv/lpc_rvv.S
+++ b/libavcodec/riscv/lpc_rvv.S
@@ -85,4 +85,33 @@ func ff_lpc_apply_welch_window_rvv, zve64d
 
         ret
 endfunc
+
+func ff_lpc_compute_autocorr_rvv, zve64d
+        li        t0, 1
+        vsetvli   zero, a2, e64, m8, ta, ma
+        fcvt.d.l  ft0, t0
+        vle64.v   v0, (a0)
+        sh3add    a0, a2, a0   # data += lag
+        vfmv.v.f  v16, ft0
+        bge       a2, a1, 2f
+1:
+        vfmv.f.s  ft0, v0
+        fld       ft1, (a0)    # ft1 = data[lag + i]
+        vfmacc.vf v16, ft0, v0 # v16[j] += data[i] * data[i + j]
+        addi      a1, a1, -1
+        vfslide1down.vf v0, v0, ft1
+        addi      a0, a0, 8
+        bgt       a1, a2, 1b   # while (len > lag);
+2:
+        vfmv.f.s  ft0, v0
+        vsetvli   zero, a1, e64, m8, tu, ma
+        vfmacc.vf v16, ft0, v0
+        addi      a1, a1, -1
+        vslide1down.vx v0, v0, zero
+        bnez      a1, 2b       # while (len > 0);
+
+        vsetvli   zero, a2, e64, m8, ta, ma
+        vse64.v   v16, (a3)
+        ret
+endfunc
 #endif