Mitsuaki Oshima

TL;DR: In this article, an information communication method of transmitting a signal that uses a change in luminance is provided. The method includes determining a pattern of the change in the luminance by modulating the signal to be transmitted, and transmitting the signal by a light emitter changing in the measured luminance according to the determined pattern.

TL;DR: In this article, an optical disk barcode forming method is described, where position information for piracy prevention, which is a form of ID, is coded as a barcode and recorded by laser trimming on a reflective film in a PCA area of an optical disks.

TL;DR: In this article, a portable terminal includes a receiver, a barcode former configured to form barcodes and a display, and the display displays the formed barcode formed by the receiver.

TL;DR: In this article, a high-resolution optical disk having a high resolution picture and a system for reproducing data on the optical disk, which are compatible with a conventional system for reproduction of an ordinary resolution picture, is presented.

TL;DR: A disk-shaped recording medium includes a transparent substrate, and an optical recording layer formed on the transparent substrate as discussed by the authors, and a position detecting device is operative for detecting at least one of a pit depth and a physical position of information which has a first given relation with a specified address and which is recorded on the recording medium.