2 files changed, 12 insertions, 0 deletions
diff --git a/src/coding/gsm0503_parity.c b/src/coding/gsm0503_parity.c
index 874114ff..a8daacc7 100644
--- a/src/coding/gsm0503_parity.c
+++ b/src/coding/gsm0503_parity.c
@@ -134,4 +134,15 @@ const struct osmo_crc8gen_code gsm0503_amr_crc6 = {
 	.remainder = 0x3f,
 };
 
+/*! GSM AMR parity (SID_UPDATE)
+ *
+ * g(x) = x^14 + x^13 + x^5 + x^3 + x^2 + 1
+ */
+const struct osmo_crc16gen_code gsm0503_amr_crc14 = {
+	.bits = 14,
+	.poly = 0x202d,
+	.init = 0x0000,
+	.remainder = 0x3fff,
+};
+
 /*! @} */
diff --git a/src/coding/libosmocoding.map b/src/coding/libosmocoding.map
index 87b38864..7f88111f 100644
--- a/src/coding/libosmocoding.map
+++ b/src/coding/libosmocoding.map
@@ -56,6 +56,7 @@ gsm0503_sch_crc10;
 gsm0503_tch_fr_crc3;
 gsm0503_tch_efr_crc8;
 gsm0503_amr_crc6;
+gsm0503_amr_crc14;
 
 gsm0503_xcch_burst_unmap;
 gsm0503_xcch_burst_map;