public void read_scalefactor_selection(Bitstream stream, Crc16 crc)
	  {
		  if (allocation != 0)
		  {
			 scfsi = stream.get_bits(2);
			 if (crc != null)
				crc.add_bits(scfsi, 2);
		  }
		  if (channel2_allocation != 0)
		  {
			 channel2_scfsi = stream.get_bits(2);
			 if (crc != null)
				crc.add_bits(channel2_scfsi, 2);
	  	  }
	  }