发明名称 |
MULTI-LEVEL SIGNIFICANCE MAPS FOR ENCODING AND DECODING |
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.
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申请公布号 |
CA2793068(A1) |
申请公布日期 |
2013.05.01 |
申请号 |
CA20122793068 |
申请日期 |
2012.10.18 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
NGUYEN, NGUYEN;JI, TIANYING;HE, DAKE |
分类号 |
H03M7/40;H04N7/50 |
主分类号 |
H03M7/40 |
代理机构 |
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代理人 |
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地址 |
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