CODING DEVICE, DECODING DEVICE, CODING METHOD, AND DECODING METHOD

WIPO Patent Application WO/2019/155971

A1

A coding device (100) is provided with a circuit (160) and a memory (162). The circuit (160) determines which mode among multiple modes including a first mode in which prediction processing is performed on the basis of a block-by-block motion vector in a moving image, and a second mode in which the prediction mode is performed on a subblock-by-subblock motion vector is used to perform the prediction processing, the subblock being obtained by dividing the block, if the prediction mode is performed in the first mode, assesses whether or not to perform correction processing on a prediction image obtained by performing the prediction processing, using a spatial gradient of pixel values in the prediction image, and performs the correction processing if the correction processing is assessed to be performed, and if the prediction processing is performed in the second mode, does not perform the correction processing.

TOMA TADAMASA (JP)
NISHI TAKAHIRO
ABE KIYOFUMI
KANOH RYUICHI

PCT/JP2019/003265

August 15, 2019

January 30, 2019

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PANASONIC IP CORP AMERICA (US)

H04N19/513; H04N19/109; H04N19/157; H04N19/176; H04N19/577

WO2017134957A1

2017-08-10

CHEN, J. ET AL.: "Algorithm Description of Joint Exploration Test Model 4", JOINT VIDEO EXPLORATION TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, 19 November 2016 (2016-11-19), XP055544255, Retrieved from the Internet [retrieved on 20190329]
See also references of EP 3751855A4

NII, Hiromori et al. (JP)

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