I would like develop a video player

[pitspace]

the player will play TV with CMMB devices.
CMMB devices is linked in MINI USB port.
the player programe read and scan channel info from MINI USB port, get channel list.
Then user can select some channel to show the program on that channel.

If I would like to implement above things what architecture I should follow?

how the player read the USB port get info?
Please give me adives, thanks in advance!