Patent ID: 7209422
Filing Date: 2007-04-24
Classification: G11B

Abstract:
1. An optical disc recording method for superimposing sub information by displacing edges of one or more optically-readable recording marks by a minute amount on the basis of a binary sequence code, when recording main information by forming said one or more recording marks, the optical disc recording method comprising: a sequence generation step of generating a first binary sequence code and a second binary sequence code that is different from the first binary sequence code; a first displacement step of displacing one of the edges according to the first binary sequence code; a second displacement step of displacing another of the edges according to the second binary sequence code; and a main information division step of dividing the main information into a plurality of consecutive frames, wherein, in the first and second displacement steps, the edges are displaced so that M-bit (M is a natural number) sub information is superimposed on N (N is a natural number) of the frames.