How to capture while playing on a hd?

[PODMAN Rv1]

I have been wanting to capture my xbox 360 footage for a long time, but i don't kno how to. right now i play on a hdtv and i want to record in either standard or high def. i dont care which one it records on, but i refuse not to play in hd cause i have for a long time. i have heard it is impossible to record while playing in hd unless u buy several converters which can equal up to like $250+. also some1 told me u can record while playing in hd and record it in standerd def, but it will create a lot of screen lag which i don't want. so if anyone can help me find a way to play in hd and record in either def. for at most $150 that would be great. explain everything as much as possible cause im new at this and if you can send links to the items i need. thanks!

[Baldrick]

Have you read https://forum.videohelp.com/topic317690.html ?

[PODMAN Rv1]

yes, i did just read it and i have a slight idea on what i need and what to do. here is my tv so u kno what inputs/outputs it does and does not have http://www.taaffephoto.com/item_detail.php?item_id=112962
i was looking at this and i think i might try this but what specs do i need for my computer, right now i have a dell laptop intel centrino duo which prob aint the greatest for this.