Patent ID: 7242853

Claim:
A system for performing a recording process and a reproducing process on a received transport stream, wherein the transport stream is composed of a plurality of transport packets, a payload of a part of the transport packets includes a part of a scrambled I picture, and further a predetermined reserved bit in a header of each transport packet is set to a first value, the system comprising: a decode unit for receiving the transport stream; and a storage unit, wherein the decode unit includes: a branching section for branching the received transport stream into two for output; a descrambler for descrambling one of transport streams output from the branching section, and outputting the transport stream with each scrambled payload descrambled; an I-picture detecting section for detecting the payload including a part of the I picture in the transport stream output from the descrambler, and outputting the detection results; a header processing section for specifying, based on the detection results output from the I-picture detecting section, a header added to a payload of an I picture from another one of the transport streams output from the branching section, changing a value of the reserved bit in the specified header to a second value, which is different from the first value, for output; and a first interface for transmitting the transport stream output from the header processing section to the storage unit, and the storage unit includes: a second interface for receiving the transport stream from the first interface for output; a data managing section for performing a writing process on the transport stream output from the second interface; and a storage medium for storing the transport packet subjected to the writing process performed by the data managing section.