It is not yet clear whether C4 and ITV would just use the back-end technology or if they would have to adopt the iPlayer branding.
If they do adopt the branding, iPlayer could replace the broadcasters' respective 4oD and ITV Player brands and establish the iPlayer as a shorter-term version of the planned cross-broadcaster catch up service Kangaroo.
The plans to share iPlayer are currently being finalised by the BBC and are intended to help ward off the prospect of licence fee top-slicing. They follow promises by director general Mark Thompson of "game-changing" proposals to share BBC resources, including technology, as a way of closing the funding gaps at its PSB rivals after digital switchover.
Speaking at The Media Festival last month, BBC head of editorial development and multimedia journalism Pete Clifton said Thompson was poised to reveal its thinking in "the next few weeks".
He said: "Why shouldn't we share our understanding of ways of working and different sets of tools. If we're putting a real focus on metadata, why shouldn't we help come up with common standards for the industry?"
According to the Guardian, the BBC consulted members of the BBC Trust on its final response to the public service broadcasting review at the weekend and is planning to submit the report to Ofcom later this week.
A BBC spokeswoman would not offer further detail. “BBC management have been developing a range of proposals which they will take to the Trust in due course. Nothing is finalised. We won't be commenting on speculation,” she said.