An apparatus 17, wherein the audio or video signals are of a third format, {HEAD ~ the third format} being different from the first data format and {TAIL ~ the second data format} 
different from
An apparatus 17 , wherein the audio or video signals are of a third format , { HEAD ~ the third format } being different from the first data format and { TAIL ~ the second data format }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL