发明授权
- 专利标题: Context adaptive directional intra prediction
- 专利标题(中): 上下文自适应定向帧内预测
-
申请号: US13079929申请日: 2011-04-05
-
公开(公告)号: US08743957B2公开(公告)日: 2014-06-03
- 发明人: Wei Liu , Ehsan Maani , Mohammad Gharavi-Alkhansari
- 申请人: Wei Liu , Ehsan Maani , Mohammad Gharavi-Alkhansari
- 申请人地址: JP Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo
- 代理商 John P. O'Banion
- 主分类号: H04B1/66
- IPC分类号: H04B1/66 ; H04N7/12 ; H04N11/02 ; H04N11/04 ; G06K9/46
摘要:
Enhanced directional prediction apparatus and methods are taught which are based on edge-based adaptive directional estimation, for providing an improved prediction direction for intra prediction within a coding device. Image gradient vectors are obtained for pixels in the neighborhood of the current block, and edge directions determined. Candidate edge directions are processed to derive a dominant edge direction in response to defining an objective function as a summation of projections to a candidate direction and computing suggested direction of each neighboring pixel. The dominant edge direction may be utilized for the prediction direction, such as in response to a detection mode flag signaled to the decoder, or modified by an angular adjustment, which can be communicated to a decoder.
公开/授权文献
- US20110249739A1 CONTEXT ADAPTIVE DIRECTIONAL INTRA PREDICTION 公开/授权日:2011-10-13
信息查询