diff --git a/bptc.py b/bptc.py
index c6e7d92..a6c86a5 100755
--- a/bptc.py
+++ b/bptc.py
@@ -163,9 +163,16 @@ def encode_emblc(_lc, _csum5):
         for hindex,hbit in zip(xrange(index+11,index+16), hamming.enc_16114(_binlc[index:index+11])):
             _binlc.insert(hindex,hbit)
     
-    # TO DO NEXT:        
-    # ADD PARITY BIT CALUCATIONS AND INTERLEAVE, RETURN A TUPLE OR LIBRARY OR EACH SEGMENT OF THE LC
+    print(_binlc, len(_binlc))
     
+    for index in xrange(0,16):
+        _binlc.insert(index+112, _binlc[index+0] ^ _binlc[index+16] ^ _binlc[index+32] ^ _binlc[index+48] ^ _binlc[index+64] ^ _binlc[index+80] ^ _binlc[index+96])
+    
+    print(_binlc, len(_binlc))
+    
+    # TO DO NEXT:        
+    # INTERLEAVE, RETURN A TUPLE OR LIBRARY OR EACH SEGMENT OF THE LC
+    # EACH SEGMENT IS 4 COLUMNS, TOP TO BOTTOM, LEFT TO RIGHT (PAGE 124 ETSI)
 
 #------------------------------------------------------------------------------
 # Used to execute the module directly to run built-in tests