Encoding and decoding two-dimensional signal using a wavelet transform
US8463061B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2007 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Jul 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/93
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Encoding and decoding devices and methods are provided. All the components of LH, HL, HH sub-band coefficients of the same hierarchy and the same space coordinate are extracted as a set from a wavelet sub-band space. Furthermore, it is judged whether each component of each coefficient is zero and as 1-bit judgment result, the respective judgment results are combined to obtain multi-bit flag information. Upon encoding, firstly, the Huffman information is subjected to variable-length encoding by the Huffman encoding code. After this, only the coefficient values which are not zero are similarly subjected to the variable-length encoding by the Huffman code or the like and outputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.