Sharp Kabushiki Kaisha Corporation

Naoyuki Fukuda

Yoshiji Fujimoto

Toshio Akabane

Yukihiro Yoshida

Masayuki Katagiri

Xiaomang Zhang

Kenji Sakamoto

Noboru Kubo

Aoi Kitaura

Kenji Kawahara

Kazuo Kinosita

A Fourier transform apparatus includes: a signal generating section for generating a plurality of sine-wave signals and a plurality of cosine-wave signals; a plurality of analog circuits each having a respective circuit parameter corresponding to a respective Fourier coefficient, and each receiving the respective sine-wave signal and the respective cosine-wave signal which are generated by the signal generating section; and an operation section for performing an operation on each of outputs of the respective analog circuits and outputting the resultant respective analog signals.

Fourier transform apparatus

A video coding device has an image motion detector, an inter-frame differencer, a discrete cosine transforming unit, and a variable length coder mounted on a single LSI. The video coding device further includes a first memory for storing a video signal block composed of a luminance signal and two color difference signals of the current frame, a second memory for storing a searching area for the luminance signal block of the previous frame, and a third memory for storing blocks of the luminance signal and two color difference signals corresponding to the detected motion vector. The video coding device operates to concurrently execute a process for detecting motion of an image from the luminance signals stored in the first and the second memories using the motion detector, a process for coding a video signal from the luminance signal and two color difference signals stored in the first and the third memories using an inter-frame predictor and a coder, and a process for outputting the coded signal at each of the serial macro blocks composing the input video signal.

Image coding device to be manufactured at low cost and to be usable with

The high speed semiconductor memory includes at least one memory module and a cache controller. The at least one memory module includes a plurality of memory cells for storing data and a cache memory for storing part of the data stored in the plurality of memory cells, The cache controller includes a hit ratio counter for obtaining an average cache hit ratio and a comparator storing a desired threshold hit value and comparing the average cache hit ratio with the desired threshold value. The cache controller determines whether data corresponding to an input address are stored in the cache memory and allows to readout such data from the cache memory, otherwise controlling the read-out of data from the plurality of memory cells for storage in the cache memory so as to update the contents of the cache memory. A request signal for transferring data from the memory cells to the cache memory is generated when the average cache hit ratio is lower than the desired threshold value. The high speed memory further includes a prediction controller for selecting data to be transferred from the memory cells to the cache memory.

High speed semiconductor memory including a cache-prefetch prediction

An apparatus for detecting a motion of an image includes a first unit for calculating first partial accumulates of one block, a second unit for calculating second partial accumulates about candidate value of first partial accumulates selected in order from the smallest value and for storing total accumulates which are sums with the first and second partial accumulates, a unit for selecting a minimum total accumulate from the total accumulates stored in the second unit and for outputting the minimum total accumulate together with a location coordinate corresponding to the minimum total accumulate.

Apparatus for detecting motion of moving picture

An apparatus for calculating a sum of products of proper elements in matrix, connected to a receiving device (21) for receiving an input vector and having a memory (11, 12) capable of storing data used to determine whether each of the matrix elements is zero or nonzero and storing data representative of contents of the matrix elements having nonzeros, the apparatus being capable of reducing a required capacity of the memory (11, 12) and a number of calculation processes in a linear transformation of the input vector received at the receiving device (21) by using a transformation matrix having matrix elements of a large scale sparse matrix, the transformation matrix being represented in a two-dimensional array and stored in the memory (11, 12), the apparatus includes a determining unit connected to the memory (11, 12) for determining whether each of the matrix elements in the transformation matrix is zero or nonzero in accordance with the zero data or the nonzero data stored in the memory (11, 12), and a calculating unit (1) connected to the receiving device (21), the determining unit (2), the memory (11, 12) and the outputting device (22) respectively for calculating the sum of products of the nonzero data store in the memory (11, 12) with the input vector with respect to each of the matrix elements which is identified as nonzeros by the determining unit (2).

Apparatus for calculating matrices

A fingerprint input apparatus is constructed to have simple construction. It serves to provide an excellen S/N ratio and reliably input a fingerprint pattern. The fingerprint input apparatus includes a light source for emitting a ray of light, a lightguide plate having a predetermined location at which a finger can be contact with the lightguide plate, a unit for directing the ray of light into at least one surfaces of the lightguide plate in a manner to keep such an angle of incidence as allowing the ray of light to be totally reflected within the lightguide plate, the lightguide plate being constructed to direct the ray of light into the predetermined location, and an image pickup unit located near the predetermined location of the lightside plate and outside of an opposite surface to a surface having the predetermined location, the image pickup unit being constructed to pick up a right irregularly reflected on a fingerprint surface of the finger contacted with the predetermined location.

Fingerprint input apparatus

A neurocomputer connected to a host computer, the neurocomputer having a plurality of processor elements, each of the processor elements being placed at each of node of a lattice respectively, the neurocomputer includes a plurality of first processor elements, each of the first processor elements being placed at a node of the lattice, capable of transmitting data from and to the host computer and capable of transmitting the data to one of adjacent processor elements, a plurality of second processor elements, each of the second processor elements being placed at a node of the lattice, capable of receiving the data from one of adjacent processor elements, and capable of sending the data to another adjacent processor elements from which the data is not outputted. The neurocomputer also includes a plurality of rectangular regions, each of the rectangular regions including a plurality of the processor elements, a plurality of physical processors, each of the processors being placed in each of the rectangular regions and connected with adjacent processors each other, each of the processors being capable of inputting and outputting to and from the host computer and having all functions of the processor elements included in the rectangular region, and a device for distributing the physical processors to one or a plurality of divided sections formed in the rectangular regions in such a manner that each of the sections is substantially equally assigned to each of the physical processors by permutation.

Growing community of inventors

Nara, Japan

Naoyuki Fukuda