Kabushiki Kaisha Toshiba

Toshiba Tec Kabushiki Kaisha

Hitachi Maxell, Limited

Maxell, Ltd.

Other

Hitachi, Ltd.

Hitachi Consumer Electronics Co., Ltd.

Powdering Japan K.k.

Morinaga Milk Industry Co., Ltd.

Japan Metals & Chemicals Co., Ltd.

Nihonsanso Kabushiki Kaisha

Tokyo, Japan

Lazoc Incorporated

Masashi Takahashi

Takeshi Watanabe

Minoru Yoshida

Muneaki Yamaguchi

Shinji Aoki

Masashi Hiroki

Hiroaki Ito

Shoko Shimmura

Tomokazu Murakami

Mitsuaki Kouyama

Toshihiro Kasai

Takehiro Fujita

Takashi Hatakeyama

Yoshiyasu Itoh

Kazuo Takaragi

Kunihiko Miyazaki

Dai Watanabe

Hisayoshi Sato

Akio Sayano

Hiroyuki Kurumatani

Soichi Furuya

Masahiro Saitou

Masahiro Saito

Masayuki Itoh

Kazuo Saito

Kunihiko Wada

Ryoichi Murakami

Kazuhide Matsumoto

Kazutoshi Takaishi

Takashi Senzaki

Kazuyoshi Nakajima

Kiyotada Yasuhara

Takao Izumi

Koichi Hamada

Keiichi Sasaki

Kazuhiko Mori

Takahiro Hamada

Kenji Kamimura

Akira Okano

Haruhiko Ishida

Isao Karube

Takashi Nagai

Koichi Yoshimura

Akinori Koga

Naoki Shibukawa

Satoru Asai

Takanari Okamura

Tadashi Tanuma

Yoshio Mochida

Norihisa Saito

Takashi Sasai

Shohei Saito

Yoshiki Niizeki

Nobuo Yamaga

Norio Ahiko

Yuto Komatsu

Minoru Yamada

Masanobu Ohi

Yuuichi Machijima

Takehiro Shirai

Satoru Shimanishi

Takayoshi Kariya

Hiroya Kadokawa

Hitomi Hirako

Seizo Hamano

Jianshun Huang

Masashige Kuwayama

Hitoshi Kanai

Nobuyuki Saito

Masahiro Saitoh

High-quality video is provided using a small amount of coded bits. The moving picture decoding method performs inter-frame prediction processing. With the aforementioned inter-frame prediction processing, blocks with similar motion vectors from among the motion vectors in multiple blocks that have already been decoded are combined and a combined area is computed. A predicted vector for a target block to be decoded is computed using the motion vector of the aforementioned combined area, and a motion vector for the aforementioned target block is computed based on the aforementioned predicted vector and a difference vector which is included in a coded stream that is input. A predicted image is generated using the aforementioned motion vector, and a difference image which is included in the aforementioned coded stream and the aforementioned predicted image are added to generate a decoded image.

Moving picture decoding method and moving picture encoding method

Some examples include a video encoding/decoding technique for improving compression efficiency. For instance, the technique includes selecting a prediction mode to be performed among a plurality of prediction modes including an intra-prediction mode and an inter-prediction mode. The technique further includes calculating a predictive motion vector in case an inter-prediction mode is selected as the prediction mode to be performed, and calculating a motion vector by summing the calculated predictive motion vector and a differential motion vector decoded from a coded stream, in case the inter-prediction mode is selected as the prediction mode to be performed. Further, some examples may include performing an inter-prediction process of the selected prediction mode using the calculated motion vector in case the inter-prediction mode is selected as the prediction mode to be performed.

Video encoding method and video decoding method

Provided is a video encoding/decoding technique for improving the compression efficiency by reducing the motion vector code amount. In a video decoding process, the prediction vector calculation method is switched from one to another in accordance with a difference between predetermined motion vectors among a plurality of motion vectors of a peripheral block of a block to be decoded and already decoded. The calculated prediction vector is added to a difference vector decoded from an encoded stream so as to calculate a motion vector. By using the calculated motion vector, the inter-image prediction process is executed.

The present invention provides an image encoding/decoding technique that is capable of achieving the higher compression efficiency. An image encoding method comprises: an intra prediction step which performs intra prediction on a block basis to generate a predicted image; a subtraction step which calculates the difference in prediction between the predicted image generated by the intra prediction step and an original image; a frequency conversion step which performs frequency conversion processing for the difference in prediction; a quantization step which subjects the output of the frequency conversion step to quantization processing; and a variable-length encoding step which subjects the output of the quantization step to variable-length encoding processing; wherein the intra prediction encoding step predicts a target pixel to be encoded by use of pixel values of two reference pixels between which the target pixel to be encoded is located.

Image encoding apparatus, image encoding method, image decoding apparatus, and image decoding method

Growing community of inventors

Yokohama, Japan

Masashi Takahashi