French media and telecoms giant Vivendi said on Wednesday it hasn't made a decision whether to exercise its right to sell a 20 percent stake in broadcaster NBC Universal.

Chief Executive Jean Bernard Levy said a decision will be made on exercising its put option in 8 to 10 weeks.

You will know more at that time, it's not something we should decide now, Levy said, speaking at a Goldman Sachs investor conference.

NBC is 80-percent owned by General Electric. Until 2016, every from mid November to early December, Vivendi has an option to sell its stake to GE, or as part of a general public offering.

Wall Street analysts currently value NBC around $20 billion, so GE would need to pay around $4 billion if it wants to buy the stake.

Since 2004, Vivendi has pocketed $1.8 billion in dividend payments from NBC as of December 2008.

(Reporting by Yinka Adegoke; Editing Bernard Orr)