Optical signal processing device, information recording/reproducing apparatus and information recording/reproducing system

Information recording/reproducing apparatus comprising:

• a recording/reproducing device that performs any one of recording and reproducing on a data stream with a predetermined data format;
• and
• an optical signal processing device that processes an optical signal based on the data stream,
• wherein the optical signal processing device includes:
• a first terminal that inputs and outputs the optical signal, said terminal being connected to a first channel of optical communication line;
• a second terminal that inputs and outputs the optical signal, said terminal being connected to a second channel of optical communication line;
• an optical signal processing portion that processes the optical signal;
• and
• a switch portion for optical communication that switches between the first and second channels of the optical communication lines, said switch portion being connected to the first and second terminals and the optical signal processing portion.

Information recording/reproducing system comprising:

• a data storage device that stores a data stream with a predetermined data format;
• and
• an information recording/reproducing apparatus that is connected to the data storage device through an optical communication line,
• wherein the information recording/reproducing apparatus includes:
• a recording/reproducing portion that performs any one of recording and reproducing on the data stream;
• an optical signal processing portion that processes an optical signal based on the data stream;
• a first terminal that inputs and outputs the optical signal, said terminal being connected to a first channel of optical communication line;
• a second terminal that inputs and outputs the optical signal, said terminal being connected to a second channel of optical communication line;
• and
• a switch portion for optical communication that switches between the first and second channels of the optical communication lines, said switch portion being connected to the first and second terminals and the optical signal processing portion.