Low complexity and memory efficient image CODEC
US9232225B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Jun 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/647
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems, devices, and methods for encoding a plurality of images by an encoder where the encoder determines a set of subbands associated with an input image, determines a set of wavelet coefficients associated with each subband, generates a wavelet tree comprising a set of nodes and a maximum quantization level for a set of descendants of the set of nodes of the wavelet tree. Then, determines if the maximum quantization level is less than a threshold and sets the wavelet coefficient to zero if it is not, otherwise encodes the maximum quantization level, and encodes the set of wavelet coefficients for transmission in a bit stream comprising the encoded maximum quantization level and the encoded set of wavelet coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.