. . . . "The DVD loader 20 is preferred to read and convert the audio format, such as wav and mp3, and the video format, such as video compact disc VCD, into the digital data, so as to broaden the use of the portable DVD player system. [0022] The video/audio circuit control 30 comprises a main control unit 31, a data decoder 32 controlled by the main control unit 31 to convert the digital data into a video" .