Abstract: A stream data processing apparatus includes a demultiplexing portion configured to demultiplex multiplexed stream data, to which a PCR is added, into a plurality of pieces of stream data to which a PTS is added, a system time measuring portion configured to measure a system time according to a PCR, a synchronous control portion configured to determine continuity of a reference time according to a PCR and system time information (SYC), to determine continuity of a reproduction time according to a PTS and an STC, and to output synchronous control information according to results of these determinations, a storage portion configured to store stream data, a decoding portion configured to decode stream data stored in the storage portion, an output portion configured to output decoded data, and a decoded data output control portion configured to control a mode of an operation of handling decoded data by the output portion, according to the synchronous control information.

Abstract: A stream data processing apparatus includes a demultiplexing portion configured to demultiplex multiplexed stream data, to which a PCR is added, into a plurality of pieces of stream data to which a PTS is added, a system time measuring portion configured to measure a system time according to a PCR, a synchronous control portion configured to determine continuity of a reference time according to a PCR and system time information (SYC), to determine continuity of a reproduction time according to a PTS and an STC, and to output synchronous control information according to results of these determinations, a storage portion configured to store stream data, a decoding portion configured to decode stream data stored in the storage portion, an output portion configured to output decoded data, and a decoded data output control portion configured to control a mode of an operation of handling decoded data by the output portion, according to the synchronous control information.

Abstract: A decoding/reproducing apparatus is equipped with: a time period setting apparatus 13 for previously setting a time period related to a synchronous control operation; a reproducing time instant detecting means 6 for detecting synchronous reproduction-purpose reproducing time instant information from stored stream data in the time period; a synchronous control apparatus 7 which compares the detected reproducing time instant information with system time instant information, and which instructs to wait for an output in the case that a difference between a reproducing time instant and a system time instant is larger than 0, and is smaller than a preset positive value, and also which instructs to discard output data in the case that a difference between a reproducing time instant and a system time instant is defined within a range of a preset negative value; and output data discarding/output waiting apparatus 4 and 11 for controlling discarding of the output data, or waiting of the output.