Recording method and recording medium playback system

A recording method for recording, on an optical disc, a multiplexed stream and an audio stream constituting a browsing slideshow, the recording method comprising:

• creating the multiplexed stream by multiplexing a video stream and a graphics stream;
• creating the audio stream;
• creating playlist information and stream information;
• and
• recording the multiplexed stream and the audio stream respectively in a multiplexed stream recording area and an audio stream recording area of the optical disc without multiplexing the multiplexed stream and the audio stream, and recording the playlist information and the stream information on the optical disc, wherein
• the multiplexed stream is a transport stream in which the video stream and the graphics stream are multiplexed, the video stream including a plurality of pieces of picture data, the graphics stream including a plurality of function segments, the plurality of pieces of picture data and the plurality of function segments having being multiplexed after being converted into TS packets, a TS packet constituting one or more of the plurality of pieces of picture data and a TS packet constituting a group of function segments from among the plurality of function segments constituting a browsing unit in the multiplexed stream,
• the group of function segments constitutes a subtitle to be displayed by being combined with the plurality of pieces of picture data, and includes (i) an object definition segment for defining a graphics object representing the subtitle, (ii) a presentation control segment for defining screen configuration using the graphics object and (iii) an end segment indicating an end of each of the function segments, the presentation control segment including state information in accordance with which a graphics decoder starts memory management by clearing content of an object buffer of the graphics decoder, the object buffer being for storing therein the graphics object obtained by decoding the function segments,
• the stream information includes transfer rate information indicating a transfer rate of the TS packets constituting the multiplexed stream from a PID filter included in a playback apparatus to a transport buffer included in a decoder, and
• the playlist information includes two or more pieces of playitem information each including period information indicating a time required to read, when the playitem information is current playitem information, a next browsing unit specified by playitem information subsequent to the current playitem information to the transport buffer included in the decoder, the time being based on a value obtained by dividing a data size of the next browsing unit by the transfer rate of the TS packets indicated by the transfer rate information.