Fujitsu Corporation

Fujitsu Frontech Limited

Hiroaki Yamashita

Takahiro Kobayakawa

Kiichi Matsuda

Kiyoshi Sakai

Yasushi Inamoto

Satoshi Tomi

Shinichiro Tsuchiya

Shogo Kawabata

Tomohiro Kamimura

An efficient audio coding device that quantizes and encodes digital audio signals with a reduced amount of computation. A spatial transform unit subjects samples of a given audio signal to a spatial transform, thus obtaining transform coefficients of the signal. With a representative value selected out of the transform coefficients of each subband, a quantization step size calculator estimates quantization noise and calculates, in an approximative way, a quantization step size of each subband from the estimated quantization noise, as well as from a masking power threshold determined from a psycho-acoustic model of the human auditory system. A quantizer then quantizes the transform coefficients, based on the calculated quantization step sizes, thereby producing quantized values of those coefficients. The quantization step sizes are also used by a scalefactor calculator to calculate common and individual scalefactors. A coder encodes at least one of the quantized values, common scalefactor, and individual scalefactors.

Audio coding device with fast algorithm for determining quantization step sizes based on psycho-acoustic model

A transaction degradation processing method to decide available transactions of automated transaction apparatus easily executes transaction degradation processing for a plurality of automated transaction apparatus installations. An administration server is connected with a plurality of the automated transaction apparatus and performs transaction degradation processing for a plurality of installations of automated transaction apparatus by using a database. There is no longer a need for separately installing programs and tables in each of automated transaction apparatus installations, modification of the table specifications is facilitated, and program maintainability is improved.

Transaction degradation processing method for automated transaction apparatus, system for same, and administration server for same

In a packet scheduler, an arithmetic-operation controlling means designates output ports in a time-sharing manner and a parallel arithmetic operation means performs an arithmetic operation common with the queues of each designated output port to obtain packet output completion due times (evaluation factors) of the top packets of queues of each output port. Intra-port selecting means selects the evaluation factor of a packet that is to be preferentially output for each output port based on the result of the arithmetic operations. Then inter-port selecting means determines one to be most-preferentially output from the top packets selected based on the selected evaluation factors and the bandwidths for the output ports. Therefore, an apparatus for controlling packet output having such a packet scheduler can realize accurately control bandwidths of a plurality of queues, high-speed processing and the reduced size thereby being incorporated in hardware.

Apparatus for controlling packet output

A dynamic image encoding method and an apparatus therefor which apply to a hierarchical motion vector detection process using an SDRAM frame memory. A precedent process is executed sequentially for one rank of a reduced screen obtained after thinning out an input screen to memorize the result, and then a subsequent process is executed sequentially between the input screens for macro blocks of the reduced screen having provided the result of the precedent process so that the precedent and the subsequent process are repeated.

Dynamic image encoding method and apparatus

A data transfer rate control method inserts a stuff packet in real time to resolve the problem present in an ATM transmission for MPEG data. The method, for controlling a data transfer rate at which coded data are transferred in an asynchronous transfer mode may include the steps of: forming the coded data for an AAL layer (ATM Adaptation Layer); calculating an insertion timing for insertion of a NULL packet; inserting the NULL packet into the coded data of the AAL layer in consonance with the insertion timing, obtained by the calculation, for the NULL packet; and transferring, in the asynchronous transfer mode, the coded data of the AAL layer into which the NULL packet is inserted.

Data transfer rate control method and data transfer rate controller

A data transfer control device and controlling method in which data on a storage medium is read continuously. The data transfer control device includes M storage units each for storing respectively at least two kinds of different data among N kinds of data in memory regions, a transmission control element for transmitting the N kinds of data and a spare storage unit for storing at least one kind of data among said N kinds of data. The transfer control device includes a judging element for judging whether accessing any one of the M storage units must be halted. Switching element for switching a memory region to the spare storage unit and the remaining (M-1) storage unit when the judging element judges that accessing must be halted and then the switching element performs an accessing operation. The data transfer control device can suppress an increase in the device forming cost, power consumption, and installation area, and can increase the amount of data which can be stored according to the number of storage units installed.

Growing community of inventors

Fukuoka, Japan

Hiroaki Yamashita