Patent ID: 7260149

Claim:
A digital data processing apparatus, comprising: a first input section that inputs a first data stream having a first data format; a second input section that inputs a second data stream having a second data format different from the first data format; and a multiplexer that divides the first data stream and the second data stream into packets each having a same size, and adds packet arrival time correction information to packets obtained by the dividing, and conducts time division multiplexing on the packets to generate a multiplexed stream, wherein the first data stream having the first data format is an MPEG2 transport stream or an MPEG2 program stream, and wherein the packet arrival time correction information includes information obtained by correcting a PCR added to a packet in the MPEG2 transport stream or an SCR added to a packet in the MPEG2 program stream by using information based on the number of packets in arbitrary data newly inserted between the packets having the added PCR or SCR.