Title:
符号化装置、復号装置、及びプログラム
Document Type and Number:
Japanese Patent JP6864557
Kind Code:
B2
Abstract:
To improve coding efficiency by reducing an input image, and to allow for high picture quality superresolution restoration of high frequency components, lost on the decoding side by reduction process and coding process, on the coding side.SOLUTION: An encoder 1 includes a reduced image generating section 10 for generating a reduced image by performing frequency resolution processing for an input image, a compression section 20 for generating quantization coefficients by performing quantization processing for the reduced image, an expansion section 30 for restoring the reduced image by performing expansion processing for the quantization coefficients, and outputting as a restored reduced image, a use band determination section 40 for generating high frequency component images by performing frequency resolution processing for the restored reduced image, and determining a frequency band having a power value of a first threshold level P or more, out of the high frequency component images, as a use band, and a coding section 50 for generating a bit stream by encoding use band information indicating the quantization coefficients and the use band.SELECTED DRAWING: Figure 1
Inventors:
Yasutaka Matsuo
Shinichi Sakaida
Shinichi Sakaida
Application Number:
JP2017102924A
Publication Date:
April 28, 2021
Filing Date:
May 24, 2017
Export Citation:
Assignee:
Japan Broadcasting Corporation
International Classes:
H04N19/59; H04N19/44; H04N19/46; H04N19/63
Domestic Patent References:
| JP2016134075A | ||||
| JP2012164147A |
Other References:
松尾康孝、境田慎一,色標本化構造と周波数スペクトルパワーを考慮した多重解像度成分のレジストレーション超解像,第31回 画像符号化シンポジウム 第21回 映像メディア処理シンポジウム,2016年11月16日,第142~143頁
松尾康孝,高精細映像の映像特徴を考慮した超解像技術とその応用,電子情報通信学会2016年総合大会講演論文集 基礎・境界/NOLTA,2016年 3月 1日
松尾康孝,高精細映像の映像特徴を考慮した超解像技術とその応用,電子情報通信学会2016年総合大会講演論文集 基礎・境界/NOLTA,2016年 3月 1日
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Makoto Fukuo
Mitsutsugu Sugimura
Makoto Fukuo