Patent ID: 8165447

Claim:
An information recording method comprising: encoding audio information and video information into a constrained format; and recording the constrained format with associated playback sequence information (PGC) to an information recording medium, wherein the constrained format defines one format of a first format (TS), the first format (TS) having a packet structure for storing data segmented in packets, wherein the constrained format is used for converting to a second format (PS), the second format (PS) having a pack structure for storing data segmented in packs, wherein the constrained format includes a plurality data management units, wherein each of the plurality of data management units includes a plurality of multiplexing units, each of the plurality of multiplexing units (i) corresponding to a pack of the second format and (ii) containing a predetermined number of packets, wherein an i-th system clock reference (SCR[i]) of an i-th pack (PACK#i) to be converted from an i-th multiplexing unit in a data management unit (Capsule) is a later one of (i) a time indicated by an i-th program clock reference (Calculated PCR[i]) corresponding to the leading packet in the i-th multiplexing unit and (ii) a time (SCR[i−1]+T) which is calculated by adding a time (T) required for transferring one pack to a time indicated by the previous system clock reference (SCR[i−1]) of the previous pack (PACK#i−1), wherein the playback sequence information (PGC) includes (i) one or more of playback sections and (ii) connection information (connection_condition), for each of the one or more playback sections, which indicates whether seamless playback is performed from the previous playback section in a playback sequence, and wherein said encoding satisfies the following conditions: (i) a time difference between (i) a system clock reference (SCR) of a pack of the second format (PS) to be converted from the last multiplexing unit in a first data management unit (Capsule#N−1) and (ii) a program clock reference (PCR) included in the leading packet in a second data management unit (Capsule#N) located next to the first data management unit (Capsule#N−1) is equal or more than 43886/27000000 seconds; and (ii) each of the plurality of data management units includes one or more GOPs (Group of Pictures).