A reception apparatus, comprising: reception means for receiving an OFDM Orthogonal Frequency Division Multiplexed signal obtained by modulating a common packet sequence configured from a packet common to a plurality of streams and a data packet sequence configured from a plurality of packets individually unique to the plural streams; time counting means for counting, using predetermined time indicated by additional information added to particular packets of the common packet sequence and the data packet sequence obtained by demodulating the received OFDM signal as a reference, elapsed time after the predetermined time; detection means for comparing the counted time and time indicated by the additional information added to the particular packets of the common packet sequence and the data packet sequence with each other to detect a displacement in the time direction between the packets; and correction means for correcting the displacement between the packets of the common packet sequence and the data packet sequence in the time direction based on a result of the detection; wherein said time counting means is adapted to count relative time to reference time which is predetermined time used as a reference from within time indicated by the additional information; said detection means is adapted to compare the counted relative time and additional time indicated by the additional information added to the particular packet later in time than the particular packet to which the additional information which indicates the predetermined time used as the reference to detect displacement of the time; and said correction mean is adapted to correct a readout timing of the packet in response to the detected displacement of the time. reception means for receiving an OFDM Orthogonal Frequency Division Multiplexed signal obtained by modulating a common packet sequence configured from a packet common to a plurality of streams and a data packet sequence configured from a plurality of packets individually unique to the plural streams; time counting means for counting, using predetermined time indicated by additional information added to particular packets of the common packet sequence and the data packet sequence obtained by demodulating the received OFDM signal as a reference, elapsed time after the predetermined time; detection means for comparing the counted time and time indicated by the additional information added to the particular packets of the common packet sequence and the data packet sequence with each other to detect a displacement in the time direction between the packets; and correction means for correcting the displacement between the packets of the common packet sequence and the data packet sequence in the time direction based on a result of the detection; wherein said time counting means is adapted to count relative time to reference time which is predetermined time used as a reference from within time indicated by the additional information; said detection means is adapted to compare the counted relative time and additional time indicated by the additional information added to the particular packet later in time than the particular packet to which the additional information which indicates the predetermined time used as the reference to detect displacement of the time; and said correction mean is adapted to correct a readout timing of the packet in response to the detected displacement of the time.