I have an LG plasma tv which has only one audio out and that is 'Optical digital audio out'.I also have a Philips home theater which has only one audio in and that is 'Coaxtial in'.My dvd player can not play mp4 movies but tv can play that well (through usb).How I can connect my home theater with my tv to achieve great sound with 5.1 multi channel speaker system ? Anyone can help me ? Thanks in advance...