发明授权
US09438912B2 Video encoding/decoding methods, video encoding/decoding apparatuses, and programs therefor
有权
视频编码/解码方法,视频编码/解码装置及其程序
- 专利标题: Video encoding/decoding methods, video encoding/decoding apparatuses, and programs therefor
- 专利标题(中): 视频编码/解码方法,视频编码/解码装置及其程序
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申请号: US14000624申请日: 2012-03-07
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公开(公告)号: US09438912B2公开(公告)日: 2016-09-06
- 发明人: Masaaki Matsumura , Seishi Takamura , Atsushi Shimizu , Hirohisa Jozawa
- 申请人: Masaaki Matsumura , Seishi Takamura , Atsushi Shimizu , Hirohisa Jozawa
- 申请人地址: JP Tokyo
- 专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Harness, Dickey & Pierce, P.L.C.
- 优先权: JP2011-051444 20110309
- 国际申请: PCT/JP2012/055787 WO 20120307
- 国际公布: WO2012/121280 WO 20120913
- 主分类号: H04N19/117
- IPC分类号: H04N19/117 ; H04N19/14 ; H04N19/82 ; G06T5/20 ; H04N19/176
摘要:
The computational complexity of a denoising filter is reduced while suppressing a reduction in coding efficiency. In a video encoding/decoding apparatus which uses a loop filter, a deviation degree calculating unit calculates the degree of deviation between a denoising target pixel and a surrounding pixel using a decoded image. A template shape setting unit limits a template shape so that its size is proportional to the degree of deviation relative to the maximum value of the degree of deviation in the decoded image. When noise of the target pixel is removed, weighted in accordance with the degree of similarity between a template of the target pixel and a template of each of search points in a search shape and the weighted sum of pixel values at the search points, the loop filter performs template matching using the limited template shape and removes noise of the target pixel.