Method and apparatus for encoding and decoding by wavelet transform
US8218645B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2010 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Mar 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/63
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A wavelet transform encoding apparatus includes a coefficient encoding unit which encodes each group of multiple wavelet transform coefficients LH, HL, and HH located spatially at the same position within multiple high-frequency subbands belonging to the same hierarchy. At the time, the coefficient encoding unit calculates an encoding parameter for the wavelet transform coefficient of an encoding object based on multiple encoded vicinal wavelet transform coefficients within the multiple high-frequency subbands belonging to the same hierarchy, and encodes the wavelet transform coefficient of the encoding object into a variable-length code by utilizing the calculated encoding parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.