<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def decode(self, byteStream):
 """Decode the RTP packet."""

        self.header = bytearray(byteStream[:HEADER_SIZE])
        self.payload = byteStream[HEADER_SIZE:]