Marantz RC5 22 bits (Extend Data Word), possible with lircd.conf semantic ?

[<lir...@pe...>]

     Hi,

     I've got a Marantz remote control RC003PM. This a kind of 
multi-standard remote as it sends classical 14 bits RC5 for the TUNER 
function but uses at least two other standards for other functions. The 
main of these two others is a RC5 modified to be longer up to 22 bits in 
length (17/18 bits of data). It seems this is called Marantz Extend Data 
Word (see chronogram below).

     My question is : How to introduce two space bits (below in cyan) 
inside an RC5 (that never returns to zero by definition) ? I tested but 
found no options of lircd.conf to do so (pre, post, pre_data, 
post_data). Is there a solution ?

     Thanks all !

/David./

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*Protocol description (http://www.perrache.com/lirc_tmp/proto.png) :*


*AUX function, buttons chronograms 
(http://www.perrache.com/lirc_tmp/chrono.png) :*


*
**The remote (http://www.perrache.com/lirc_tmp/remote.jpg) :*