Mitsubishi Electric Corporation

Shinya Hirakuri

Yuichi Yamamoto

Hideo Yoshida

Akinori Fujimura

Yuta Takemoto

Toshiyuki Kuze

Kazuyoshi Tsuji

Jin Miyazawa

An image transmission device () includes a compression unit () to generate first compression images () which are obtained by irreversibly compressing divided images, and to generate second compression images () which are obtained by reversibly compressing each of the first compression images (), a decompression unit () to decompress each of the first compression images () as decompression images (), a division sum image generation unit () to generate a division sum image (imgSUM), an error sum image generation unit () to generate an error sum image (&#x394;imgSUM), a judgment unit () to generate judgment data (Dj), and a transmission unit () to transmit the second compression images (), the division sum image (imgSUM), the error sum image (&#x394;imgSUM) and the judgment data (Dj).

Image transmission device, image reception device and computer readable medium

Provided is a digital switch including: a plurality of input-side memories, which are arranged in a one-to-one correspondence with a plurality of input ports, and are configured to accumulate time-division multiplexed data; a plurality of output-side memories, which are arranged in a one-to-one correspondence with a plurality of output ports, and are configured to accumulate time-division multiplexed data; and a switch matrix configured to receive, as input, the time-division multiplexed data read out in every cycle from each of the plurality of input-side memories, and execute routing for selecting, in accordance with a connection control signal received from outside, any one of the plurality of output-side memories such that the time-division multiplexed data read out in every cycle is output from each of the plurality of output ports without causing a difference in delay, to output the time-division multiplexed data.

Digital switch, wireless communication device, control station, and wireless communication control method for switching a route of communication data

A coefficient conversion unit obtains a conversion coefficient for each image region by performing coefficient conversion for each image region. A luminance distribution extraction unit generates luminance distribution information indicating a luminance of each image region. A correction coefficient determination unit determines a correction coefficient based on the luminance distribution information for each image region. A quantization width correction unit obtains a corrected quantization width for each image region by correcting a quantization width with use of a correction coefficient of an image region for each image region. A scalar quantization unit obtains a quantized conversion coefficient for each image region by quantizing a conversion coefficient of an image region with use of a corrected quantization width for each image region. An entropy encoding unit obtains an encoded conversion coefficient for each image region by performing entropy encoding on a quantized conversion coefficient for each image region.

Image encoding apparatus and computer readable medium

In a coding device (), a first coding unit () generates a parity of an RS code by coding, based on the RS code, each first data sequence existing in a direction different from a row direction of input data, and generates coded data by attaching the parity of the RS code to each first data sequence, thereby consequently expanding a matrix. A second coding unit () generates a parity of a BCH code and a parity of an LDPC code by coding, based on the BCH code and the LDPC code, each second data sequence existing in a row direction of the coded data, and generates a plurality of DVB-S2 frames () including, per DVB-S2 frame (), one data sequence existing in the row direction of the coded data, the corresponding parity of the BCH code, and the corresponding parity of the LDPC code.

Growing community of inventors

Chiyoda-ku, Japan

Shinya Hirakuri