@tinifork
All suggestions by our helpful members are correct ho.
As I have mentioned, there are many ways of doing this.
The most practical ( very cheap, comes in handy, and ready to use ) is to buy the cheap cdr king wireless headphones ( by the way, i used both the cdr king and Sony brands ), and as our friendly members already suggested to you, just plug the left/right rca plugs of your future wireless headphone to the left/right AUDIO OUT sockets of your tv.
Checking this LD330 from LG's site, there are 2 possible AUDIO OUT available. Please choose the one with fixed sound output ( the sound that is independent of your tv's volume control para ho mas maganda ang overall sound quality---- pag very low ho kasi ang input level sa wireless heaphones, maingay ang transmitted signal ).
hope this clears more...................