The main function of broadcast media AV system is a bridge to connect between PC (personal computer) and TV (television). This device can store the AV bit stream downloaded from Internet through PC to a storage device, HD (hard disk) and flash memory, in this broadcast media AV system. When users want to display the stored medium, they can select the media through input mediums, such as touch buttons, remote control, and character input, to choose different mediums. This device can automatically select the different formats of AV medium by itself. After manipulated the AV bit stream through the device, the device can convert digital signals to analog signals or directly use digital signal interface to display the medium on the TV.