Speaking on the sidelines of Nuclear Security Summit, Singh said "There was a need to rewrite the architecture of global economic system in which the G-20 could play an important role."
Singh and President Barack Obama discussed a broad range of issues, including global economic crisis, follow up of G-20 meetings and food security and energy security.
Briefing the reporters on the meeting, Foreign Secretary Nirupama Rao said, "The Prime Minister told he was convinced that the two countries could begin a new chapter in their relations."
"India was poised to achieve high economic growth of 9-10 per cent. For this to happen, there was need for peace in the region," Rao quoted Singh telling Obama.
Prime Minister also said that countries like India needed international environment that does not allow protectionist forces to gain ascendancy, Rao added.