Patent ID: 7706379

Claim:
A transport stream (TS) transmission system which transmits a TS through a transmission path, the TS comprising a video packet, an audio packet, a null packet, and a program clock reference (PCR) packet inserted at a predetermined interval, the system comprising: a transmitting apparatus which transmits a TS to the transmission path; and a receiving apparatus which receives the TS transmitted from the transmitting apparatus through the transmission path, the transmitting apparatus comprising: an input interface which receives an input of the TS; a counter which sequentially counts the number of packets contained in the input TS and outputs count values; a determining section which determines a packet type of each of the packet contained in the input TS; a multiplexing section which multiplexes the count values of PCR packets contained in the TS on a predetermined field of each of the PCR packets, based on the packet type; a discard section which discards null packets from the TS based on the packet type; and a transmitting section which sequentially transmits to the transmission path for transmission of the TS in which the count values have been multiplexed on the PCR packets and from which the null packets have been discarded to the receiving apparatus, the receiving apparatus comprising: a receiving section which receives the TS transmitted from the transmitting apparatus through the transmission path; an extraction section which extracts the count values from the PCR packets contained in the received TS; and a restoring section which inserts null packets based on count values multiplexed with respect to a field of the immediately preceding PCR packet and count values multiplexed with respect to a field of the next PCR packet, in order to restore a TS equivalent to a previous TS from which the null packets are discarded.