diff --git a/pdfminer/lzw.py b/pdfminer/lzw.py
index 6463cf1..56c86e3 100644
--- a/pdfminer/lzw.py
+++ b/pdfminer/lzw.py
@@ -50,12 +50,12 @@ class LZWDecoder(object):
         return v
 
     def feed(self, code):
-        x = b''
+        x = ''
         if code == 256:
-            self.table = [bytes([i]) for i in range(256)] # 0-255
+            self.table = [ chr(c) for c in xrange(256) ] # 0-255
             self.table.append(None) # 256
             self.table.append(None) # 257
-            self.prevbuf = b''
+            self.prevbuf = ''
             self.nbits = 9
         elif code == 257:
             pass
@@ -69,7 +69,7 @@ class LZWDecoder(object):
                 self.table.append(self.prevbuf+self.prevbuf[:1])
                 x = self.table[code]
             else:
-                raise CorruptDataError()
+                raise CorruptDataError
             l = len(self.table)
             if l == 511:
                 self.nbits = 10
@@ -86,7 +86,6 @@ class LZWDecoder(object):
                 code = self.readbits(self.nbits)
             except EOFError:
                 break
-            x = self.feed(code)
             try:
                 x = self.feed(code)
             except CorruptDataError:
diff --git a/pdfminer/pdfinterp.py b/pdfminer/pdfinterp.py
index 526f503..357ca16 100644
--- a/pdfminer/pdfinterp.py
+++ b/pdfminer/pdfinterp.py
@@ -219,10 +219,7 @@ class PDFContentParser(PSStackParser):
                 self.istream += 1
             else:
                 raise PSEOF('Unexpected EOF, file truncated?')
-            data = strm.get_data()
-            if isinstance(data, bytes):
-                data = data.decode('latin-1')
-            self.fp = StringIO(data)
+            self.fp = StringIO(strm.get_data())
         return
 
     def seek(self, pos):