encrypted .trp recorded from set-top box

encrypted .trp recorded from set-top box

 

hey guys i need to know how to decrypt an encrypted .trp file anyhow?? i have recorded some video from my settop box into my pendrive.. when i plugged in the USB to my PC.. it shows me four files . .

1. ext.ch
2. TS.idx
3. TS.ifo
4. ts_00.trp

i used all converter programs but nothing worked..

hope someone can help..thanks