Hello arduino friend.
You must convert each hex number to decimal after multiple with *26 the result is usecs pulse. (1/38000Hz =0.000026 )
Online converter : http://www.mathsisfun.com/binary-decimal-hexadecimal-converter.html
To understand the data you posted (Pronto hex format) I suggest you read the following: http://www.hifi-remote.com/infrared/IR-PWM.shtml
006b = frequency
0032 = number total bits
0081 0040 = Header pulses On PWM /Off wait
0010 0010 = bit 0
0010 0030 = bit 1
then if you have the total binary convert it to hex like your example...
I think it is not NEC protocol....i understand it from header...
I have example into my website.