Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mitsubishi Denki K.k.

Mitsubihsi Denki Kabushiki Kaisha

Kohtaro Asai

Shunichi Sekiguchi

Tokumichi Murakami

Yoshihisa Yamada

Hirofumi Nishikawa

Shinichi Kuroda

Yoshimi Isu

Yuri Hasegawa

Yoshimi Moriya

Kazuo Sugimoto

Yuichi Idehara

Fuminobu Ogawa

Takahiro Fukuhara

Shuichi Yamagishi

Atsushi Itoh

Hideo Ohira

Yoshiaki Kato

Kenichi Asano

Kazuhiro Matsuzaki

Toshiaki Shimada

Masami Nishida

James Chow

Atsushi Ito

Hiroshi Ito

Koh Kamizawa

Koichi Magai

Mitsuyoshi Suzuki

Ryousuke Fujii

Atsuhiro Yamagishi

Touru Inoue

Kenji Otoi

Naoto Kinjo

Shinji Akatsu

Shin Miura

Masami Matsubara

Shigeru Imai

Okikazu Tanno

Takumi Akiyama

Eizo Yamazaki

Naoto Kinjoh

Yuuichi Idehara

A macro block size determining unitdetermines the size of each macro block on a frame-by-frame basis. A macro block dividing unitdivides an inputted image into macro blocks each having the size determined by the macro block size determining unit. A macro block coding unitdetermines a coding mode for each of the macro blocks divided by the macro block dividing unit, and codes pixel values in each of the macro blocks in the determined coding mode.

Moving image coding apparatus and moving image decoding apparatus

An encoding controlling unitselects one transformation block size which provides an optimal degree of encoding efficiency from a set of transformation block sizes which are determined in accordance with an encoding mode, and includes the transformation block size selected thereby in optimal compression parametersto notify the transformation block size to a transformation/quantization unit, and the transformation/quantization unitdivides an optimal prediction differential signalinto blocks having the transformation block size included in the optimal compression parameters, and carries out a transformation and quantization process on each of the blocks to generate compressed data

Moving image encoding device and moving image decoding device based on adaptive switching among transformation block sizes

A moving image encoding apparatus for dividing a moving image into a plurality of rectangular regions and encoding the moving image in a unit of the rectangular region. There is a rectangular region size determiner which determines a variable size of the rectangular region, a rectangular region divider which divides an inputted image into the rectangular region, and a rectangular region encoder which determines a coding mode for the rectangular region, and encodes pixel values in the rectangular region.

A bit stream generating method, generating apparatus, and non-transitory computer readable medium. The bit stream generating method includes determining a size of rectangular region for a sequence, determining a coding mode for the rectangular region, dividing the rectangular region into the prediction blocks, acquiring differences between the predicted image and the pixel values, dividing the rectangular region of the prediction error into blocks, and multiplexing information about the size of the rectangular region for the sequence.

A moving image decoding apparatus and decoding method. The apparatus comprises an entropy decoder, a rectangular region size determiner, and a rectangular region decoder. The rectangular region decoder includes a motion compensator performing motion compensation prediction on a motion compensation region using a motion vector information to obtain a prediction image. Further, there is a transformer performing an inverse quantization and inverse orthogonal transformation process based on the block size indication information.

A moving image decoding apparatus and method for decoding an encoded bit stream. The encoded bit stream is obtained by dividing a moving image into rectangular regions and coding the rectangular regions as units. The apparatus includes a rectangular region size decoder, a rectangular region size determiner, a coding mode decoder, and a rectangular region decoder.

A method and system for predicting a moving picture to be implemented in an encoder is provided. The system includes a plurality of reference picture memory areas for storing reference pictures to be used for prediction and a prediction generation section that includes a motion compensator and memory updater. The motion compensator receives a parameter representing the motion between an image to be predicted and a reference picture stored in the reference picture memory area and a parameter representing the reference picture memory area to be used for prediction, and generates a predicted image by using the reference picture stored in the reference picture memory area indicated by the parameter representing the reference picture memory area. The memory updater carries out dynamic allocation of reference picture memory areas required for prediction and judges whether to store new reference pictures additionally.

Moving picture prediction system

A moving picture encoder and encoding method for encoding a moving picture signal are disclosed. The moving picture encoder includes a plurality of reference picture memory areas, each area storing picture data of a reference picture to be used for prediction; and a prediction picture generator including a motion compensator that generates the predicted picture by using the picture data stored in the reference picture memory area, a parameter representing a motion between an image to be predicted and the reference picture and prediction mode information indicating a prediction mode corresponding to a prediction method used for generating a predicted picture, and a memory updater that controls a timing of updating the picture data of a full frame stored in the reference picture memory area; and a multiplexer that multiplexes an information representing memory update in a bitstream.

Moving picture encoder and encoding method

An apparatus to decode an encoded bit stream obtained by dividing the moving image into a plurality of rectangular regions includes a rectangular region size determination unit for determining a variable size of the regions in a sequence (a set of continuous frames) based on region size information multiplexed in the encoded bit stream. The apparatus includes a decoding unit for decoding coding mode information multiplexed in the encoded bit stream for each of the regions, and a decoding unit. The coding mode information includes (1) prediction type information selected from information indicating either inter or intra prediction coding, and (2) intra prediction block size information indicating a size of a unit region for the intra prediction coding indicated by the prediction type information.

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Tokyo, Japan

Kohtaro Asai