Recording medium, playback device, and integrated circuit

A playback device for playing back video images from a recording medium, the playback device comprising:

• a reading unit operable to read, from the recording medium, a base-view stream file used for monoscopic video playback and a dependent-view stream file used for stereoscopic video playback in combination with the base-view stream file;
• a separation unit operable to separate extents from the read base-view stream file and the read dependent-view stream file;
• a first read buffer storing, from among separated extents, base-view extents belonging to the base-view stream file;
• a second read buffer storing, from among separated extents, dependent-view extents belonging to the dependent-view stream file;
• and
• a decoder operable to receive, from each read buffer, compressed pictures included in each extent and to decode the compressed pictures,
• the recording medium comprising a contiguous area in which a plurality of base-view extents and a plurality of dependent-view extents are arranged in an interleaved manner, wherein
• a lower limit of a size of each base-view extent is a larger one of a first lower limit value and a second lower limit value,
• the first lower limit value is determined so that, in monoscopic video playback, underflow does not occur in the first read buffer during a jump period from each base-view extent to a next base-view extent,
• the second lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the first read buffer during a read period of a next dependent-view extent after each base-view extent,
• a lower limit of a size of each dependent-view extent is a third lower limit value, and
• the third lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the second read buffer during a read period of a next base-view extent after each dependent-view extent.

An integrated circuit loaded on a playback device for playing back video images from a recording medium, the playback device comprising:

• a reading unit operable to read, from the recording medium, a base-view stream file used for monoscopic video playback and a dependent-view stream file used for stereoscopic video playback in combination with the base-view stream file;
• a separation unit operable to separate extents from the read base-view stream file and the read dependent-view stream file;
• a first read buffer storing, from among separated extents, base-view extents belonging to the base-view stream file;
• and
• a second read buffer storing, from among separated extents, dependent-view extents belonging to the dependent-view stream file,
• the integrated circuit comprising:
• a decoder operable to receive, from each read buffer, compressed pictures included in each extent and to decode the compressed pictures;
• and
• a control unit operable to control provision of compressed pictures from each read buffer to the decoder,
• the recording medium comprising a contiguous area in which a plurality of base-view extents and a plurality of dependent-view extents are arranged in an interleaved manner, wherein
• a lower limit of a size of each base-view extent is a larger one of a first lower limit value and a second lower limit value,
• the first lower limit value is determined so that, in monoscopic video playback, underflow does not occur in the first read buffer during a jump period from each base-view extent to a next base-view extent,
• the second lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the first read buffer during a read period of a next dependent-view extent after each base-view extent,
• a lower limit of a size of each dependent-view extent is a third lower limit value, and
• the third lower limit value is determined so that, in stereoscopic video playback, underflow does not occur in the second read buffer during read period of a next base-view extent after each dependent-view extent