it may work but i dont know if the Hardware (The card and your PC) support this.
Some PC´s (Bios and mainboard) may support "Wake UP" on PCI events
Hmm as i see this card is an USB i dont know if your system does support this wake up on USB event function.
On my system it should work i must set an Jumper that the USB has also Power if the PC is shutdown and than i must change a value in the Bios that he accepts USB Events for Powering on.
If you have such functions too it may work. Look at your Mainboard Manual and the Bios for this.
But i dont know if the WinTV-NOVA-TD supports such functions. So you can have activated the Function in your Bios and it does still not work