Abstract: This invention is about a computer add-on card that is capable of transferring MPEG-2 Transport Stream file from a computer storage (hard disk, DVD-ROM, etc.) to an external equipment such as: Digital TV settop box, modulator, etc. Besides handling PCI protocol communication, this add-on card also controls MPEG-2 Transport Stream generation, and signal format and interface conversion. To incorporate various output signal formats and interfaces, a daughter board is implemented as the output signal format and interface converter part. Using this daughter board, user can have various different Digital TV output signals without the need of modifying the application program.