To provide improved operability by enabling simple reproduction for a user when an audio signal is mainly recorded, and to facilitate real time management.

This device is provided with a simple audio manager (SAMG), an AMG, an audio title set (ATS) containing a plurality of audio objects (AOBs), and a still picture set (SPS), and the AOB is constituted of two kinds of AOTT-AOBs, one containing only aduio data, and another containing audio data and real time information data (RTI data). The still picture set (SPS) contains still picture data (SPCT data).