[Mp4-tech] Continue discuss the Sigmadesigns solution

[avtechinfo sina.com]

Hi All,
The 85XX solution is more cheaper 84XX ones, so I think it is better use the 85XX to develop a IP-box, but the 85XX series is focus on DVD player now, so some function on the 84XX solution have not been ported to 85XX solution, if the 85xx is adopted, what should do in furture is:
1: Demux ISO mpeg4.
2: Decode AAC(iso mpeg4 audio) by software. 
3: A/V sync.
4: ISMA client software
The OS is uclinux.
It seems Sigmadesigns China cannot push Sigmadesigns US team to develop the above things for us, so we have to fixed all the problem by ourself or select other solutions. 
Anybody have experienced in such kind of project: How long will take and how many engineers will be involved in the project? I know the question is hard to answer because that depends on the engineers tech level and the spec of product, anyway I need some basic advice from you so any answer is welcome.
Thanks! 
Best Regards,
KANG Lei