Sony Corporation

Shoji Kanamaru

Hitoshi Kimura

Yoshihiko Kuroki

Yoshifumi Mori

Ryuichi Ugajin

Akira Ishibashi

Hiroyuki Okuyama

Shunji Imanaga

A data processing method for specifying linear conversion for making the number of active S-box maximum, wherein a plurality of linear conversion candidates satisfying a restriction on a circuit for realizing linear conversion candidates are specified among the plurality of linear conversion candidates, linear conversion processing is performed based on a plurality of input data on each of the specified linear conversion candidates, a minimum value of the number of zeros arisen in processing results thereof (a so-called active S-box) is obtained, a linear conversion candidate making the minimum value largest is specified, and a linear conversion portion is configured based on the specified linear conversion candidate.

Linear conversion circuit and encryption circuit

Information to be stored is input to a plurality of information carrier storage means that interact with each other. A unit amount of information carriers is added to a position selected from the information carrier storage means, and nonlinear diffusion of information carriers is executed from the selected information carrier storage means to its neighboring information carrier storage means, and at the same time, nonlinear dissipation is executed from the information carrier storage means. At that time, the dissipation amount is determined so that the amount adding the difference between the amount of addition and the amount of dissipation to the input representation does not exceed a predetermined threshold value. When equilibrium is confirmed as a result of judgement whether changes in amount of information carriers of each information carrier storage means has become small or not, the amount of information carriers stored in the information carrier storage means is output as a numerical value.

Information storage method, information storage device and recording medium

A method and apparatus, which can transform one multidimensional information pattern into another multidimensional information pattern and inversely transform the multidimensional information pattern having been transformed. Forward transform and inverse transform of a multidimensional information pattern are made by inputting information carriers expressed by n-dimensional vectors (n is a natural number) to a number n of information carrier storing elements which are distributed over an m-dimensional space (m is a natural number) and have the function of holding information carriers in a real number value; repeating processing to apply a predetermined amount of information carriers to the information carrier storing elements and outputting information carriers expressed by n-dimensional vectors from the number n of information carrier storing means.

Information processing method, information processing apparatus, and recording medium

An image processing apparatus capable of extracting widely viewed features of an entire image and speedily performing image processing, and a method and an information recording medium for such processing. Image data of an original image is obtained by imaging the entire original image with an image pickup unit at a time. An amplitude distribution of a signal is obtained from the image data by fast Fourier transform performed by a fast Fourier transform section of a signal processing unit. An amplitude replacement section replaces the amplitude distribution with a predetermined function using the distance from a center of a frequency plane as a parameter. An inverse fast Fourier transform section forms an image corresponding to the original image by inverse fast Fourier transform from a phase distribution of points obtained by the fast Fourier transform and from an amplitude distribution obtained by the above-described replacement.

Apparatus for and method of processing image and information recording medium

A semiconductor laser using II-VI compound semiconductors and capable of emitting blue to ultraviolet light is disclosed. The semiconductor laser is configured to sandwich an active layer made of a Zn.sub.x Mg.sub.1-x S.sub.y Se.sub.1-y compound semiconductor where 0.ltoreq.x&lt;1 and 0.ltoreq.y.ltoreq.1 excluding ranges of 1.2y-2.2x.gtoreq.1, 1.3y-3.9x.gtoreq.1, x.gtoreq.0, and y.ltoreq.1 by an n-type cladding layer and a p-type cladding layer from opposite sides.

Growing community of inventors

Tokyo, Japan

Shoji Kanamaru