An optical recording medium for accurately deriving the address information or the disc rotation control information despite narrow track pitch and for recording signals to a high density, and a method and apparatus for recording andor reproducing such optical recording medium. Feedback lines from the printhead are coupled to a processor that controls the printhead. The systems and methods prepare the signal from the serial bus for transmission over a network and entail the receipt of the signal at a remote diagnostic site or medical processing center. Cellulose insulation is a paper-based material, like newsprint or phonebook paper that is shredded and chemically treated with boric acid, which imparts resistance to mold, mildew, fungus, insects, moisture and flammable combustion. The axis of rotation of the spindle that carries the machining tool is displaced around an orthogonal swivel axis relative to the tool axis of rotation so that the cutting directions are opposite to each other with respect to the work wheel in the machining of the lower tooth edges and the upper tooth edges. The bit stream separating apparatus makes it possible for the bit stream merging apparatus to reconstruct the original, high quality, MPEG-2 bit stream from the transcoded MPEG-2 bit stream already received and the differential bit stream, thereby eliminating the effort and time to send the original MPEG-2 bit stream again.