Mute function on COD4

[axeman2008]

I've just bought COD4 for the ps3 and i want to go online, now i have headset that is connected properly however in the lobby and in game i can hear people talking through my tv and i can't seem to find the mute function which brings me to my question. Does the ps3 version of COD4 have a mute function? And if so where the hell is it?

[FLANKER 5]

Well I don't have a ps3 but on the 360 quick mute all you have to do is scroll down to the person you want to mute and click A....If tnot that then maybe it doesn't have a QM option.