Sony Corporation

Sayoko Shibata

Junichi Ogikubo

Taro Shigata

Zhifang Zeng

An encoding method includes controlling recording of frame-position information representing the position of a frame in a video stream, and controlling recording of unit-region-position information representing the position of a unit region serving as a processing unit used when the video stream is decoded.

Encoding apparatus and method, and decoding apparatus and method

With a decoding method for decoding an encoded stream using a predetermined storage region where input of reproduction information indicating an reproduction state of the encoded stream is received, reference picture information indicating a reference picture necessary for performing decoding processing of a relevant picture in the encoded stream is obtained, based on the reproduction information input by the reproduction information input processing, whether the reference picture is stored in a predetermined storage region is determined, based on the reference picture information obtained by the reference picture information obtaining processing, the reference picture not stored in the storage region is obtained from the encoded stream and decoded, and storage thereof to the storage region is controlled, and the reference picture stored in the storage region is used to perform decoding processing of the relevant picture in the encoded stream, thereby generating image data which is stored in the storage region.

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Kanagawa, Japan

Sayoko Shibata