| 摘要 |
A DTV module (1) includes a CPU (19), a decoder (2), and a CA interface circuit (3). The decoder (2) executes a decoding processing on a digital television signal inputted from a demodulator (12) provided on a motherboard (101), so as to decode the digital television signal into a video signal and an audio signal, and outputs the video signal and audio signal. The CA interface circuit (3) is connected to a CA module (14) via a PC card socket (13), and executes input and output processings on signals communicated among the demodulator (12), CA module (14), decoder (18), and CPU (19). The CPU (19) controls the CA interface circuit (3) by switching types of the signals, so that a selected type of signal conforms to a type of the CA module (14), in response to a broadcasting system of a digital television signal or the type of the connected CA module (14). |
