public void read_scalefactor_selection(Bitstream stream, Crc16 crc)
	  {
	    if (allocation != 0)
	    {
	  	 scfsi = stream.get_bits(2);
	  	 channel2_scfsi = stream.get_bits(2);
	  	 if (crc != null)
	  	 {
	  		crc.add_bits(scfsi, 2);
	  		crc.add_bits(channel2_scfsi, 2);
	  	 }
	    }  
	  }