judging means for judging whether {TAIL ~ the external device} is able to receive {HEAD ~ the data} to be reproduced; and 
judging means for judging whether { TAIL ~ the external device } is able to receive { HEAD ~ the data } to be reproduced ; and
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH