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1. (WO2018221553) ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD

Pub. No.:    WO/2018/221553    International Application No.:    PCT/JP2018/020656
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu May 31 01:59:59 CEST 2018
IPC: H04N 19/12
H04N 19/157
H04N 19/159
H04N 19/60
Applicants: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Inventors: OHKAWA Masato
大川 真人
SAITOU Hideo
齋藤 秀雄
TOMA Tadamasa
遠間 正真
NISHI Takahiro
西 孝啓
ABE Kiyofumi
安倍 清史
KANOH Ryuichi
加納 龍一
Title: ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD
Abstract:
An encoding device (100) for encoding blocks to be encoded from a picture is provided with a processor and memory. When the processor uses the memory to determine whether intra prediction is to be used in a block to be encoded and determines that intra prediction is to be used in the block to be encoded, the processor (i) generates a first conversion coefficient by using a first conversion base to perform first conversion on a residual signal of the block to be encoded, (ii-1) quantizes the first conversion coefficient when the intra prediction mode for the block to be encoded is a predetermined mode and the first conversion base is different from a predetermined conversion base, and (ii-2) generates a second conversion coefficient by using a second conversion base to perform second conversion on the first conversion coefficient and quantizes the second conversion coefficient when the intra prediction mode for the block to be encoded is not the predetermined mode or when the first conversion base matches the predetermined conversion base.