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1. (WO2018021374) ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD

Pub. No.:    WO/2018/021374    International Application No.:    PCT/JP2017/026960
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Thu Jul 27 01:59:59 CEST 2017
IPC: H04N 19/12
H04N 19/157
H04N 19/176
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
NISHI Takahiro
西 孝啓
TOMA Tadamasa
遠間 正真
Title: ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
Abstract:
An encoding device (100) which performs frequency transformation on blocks to be encoded in an image is provided with: a size determination unit (1061) which determines whether the size of a block to be encoded is equal to or smaller than a threshold size; a basis selection unit (1062) which selects a basis for the block to be encoded from among a plurality of frequency transformation bases, if the size of the block to be encoded is larger than the threshold size; and a frequency transformation unit (1063) which uses a fixed frequency transformation basis to transform the block to be encoded if the size of the block to be encoded is equal to or smaller than the threshold size, and uses the basis selected by the basis selection unit (1062) to transform the block to be encoded, if the size of the block to be encoded is larger than the threshold size.