Abstract: An apparatus for displaying images, such as a DVD player, outputs video signals, audio signals and sub-picture signals to a digital TV system in the form of digital signals. The PCM audio signals as decoded by means of the audio decoder 11 are converted into packets in the PCM/IEEE-1394 packet converter 27 after adjusting presentation timing matching by the presentation engine 17. The sub-picture signals as decoded by means of the sub-picture decoder 15 are also converted into packets in the IEEE-1394 packet converter 29 after adjusting presentation timing matching by the presentation engine 17. The video PES is converted into transfer streams by the MPEG-PS/TS converter 25 together with the system clock reference SCR and converted into packets in the IEEE-TS/1394 packet converter 31. The respective isochronous packets are transferred to a digital TV system through the 1394 link layer 33 and the physical layer 95.