Invention Grant
- Patent Title: Video encoding apparatus and video decoding apparatus
- Patent Title (中): 视频编码装置和视频解码装置
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Application No.: US13263380Application Date: 2010-03-17
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Publication No.: US08855203B2Publication Date: 2014-10-07
- Inventor: Tomoyuki Yamamoto , Tomohiro Ikai
- Applicant: Tomoyuki Yamamoto , Tomohiro Ikai
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2009-093606 20090408; JP2009-146509 20090619
- International Application: PCT/JP2010/054485 WO 20100317
- International Announcement: WO2010/116869 WO 20101014
- Main IPC: H04N7/12
- IPC: H04N7/12 ; H04N11/02 ; H04N11/04 ; H04N19/157 ; H04N19/12 ; H04N19/176 ; H04N19/463 ; H04N19/61 ; H04N19/122 ; H04N19/109 ; H04N19/119

Abstract:
While maintaining a high degree of freedom in choosing partition sizes and transformation sizes adapted for local characteristics of videos, the amount of metadata is decreased. A video encoding apparatus (10) divides an input video into blocks of a prescribed size and encodes the video block by block. The video encoding apparatus is provided with: a prediction parameter determining portion (102) that decides the block partition structure; a predictive image producing portion (103) that generates predictive images, partition by partition, as prescribed by the partition structure; a transform coefficient producing portion (107) which applies one of the frequency transformations included in a prescribed transformation preset to prediction residuals, i.e. the differences between predictive images and the input video; a transform restriction deriving portion (104) which generates the list of transform candidate, i.e. lists of frequency transformations that can be applied to each partition, on the basis of partition format information; and a variable-length-encoding portion (108) which, on the basis of the list of transform candidate and the transformation preset, performs variable-length encoding on transformation selection flags.
Public/Granted literature
- US20120033731A1 VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS Public/Granted day:2012-02-09
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