发明授权
- 专利标题: Multi-level significance maps for encoding and decoding
- 专利标题(中): 用于编码和解码的多级重要性图
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申请号: US13286336申请日: 2011-11-01
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公开(公告)号: US08964849B2公开(公告)日: 2015-02-24
- 发明人: Nguyen Nguyen , Tianying Ji , Dake He
- 申请人: Nguyen Nguyen , Tianying Ji , Dake He
- 申请人地址: CA Waterloo
- 专利权人: BlackBerry Limited
- 当前专利权人: BlackBerry Limited
- 当前专利权人地址: CA Waterloo
- 代理机构: Rowand LLP
- 主分类号: H04N19/60
- IPC分类号: H04N19/60 ; H04N19/132 ; H04N19/18 ; H04N19/70 ; H04N19/91 ; H04N19/61 ; H04N19/136 ; H04N19/13 ; H04N19/172 ; H04N19/159
摘要:
Methods of encoding and decoding for video data are described in which multi-level significance maps are used in the encoding and decoding processes. The significant-coefficient flags that form the significance map are grouped into contiguous groups, and a significant-coefficient-group flag signifies for each group whether that group contains no non-zero significant-coefficient flags. If there are no non-zero significant-coefficient flags in the group, then the significant-coefficient-group flag is set to zero. The set of significant-coefficient-group flags is encoded in the bitstream. Any significant-coefficient flags that fall within a group that has a significant-coefficient-group flag that is non-zero are encoded in the bitstream, whereas significant-coefficient flags that fall within a group that has a significant-coefficient-group flag that is zero are not encoded in the bitstream.
公开/授权文献
- US20130107969A1 MULTI-LEVEL SIGNIFICANCE MAPS FOR ENCODING AND DECODING 公开/授权日:2013-05-02