Multiple sign bit hiding within a transform unit
US9008184B2 · kind B2 · utility
9Cited by
3References
26Claims
0Family size
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Key dates
| Filing date | Jan 20, 2012 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jan 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/625
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods of encoding and decoding for video data are described for encoding or decoding coefficients for a transform unit. In particular, the sign bits for the non-zero coefficients are encoded using sign bit hiding. Two or more sets of coefficients are defined for the transform unit and a sign bit may be hidden for each set, subject to satisfaction of a threshold test. The sets may correspond to coefficient groups that are otherwise used in multi-level significance map encoding and decoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.