Encoding method and apparatus
US6266450A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1998 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Sep 29, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for the encoding of a series of wavelet coefficients of a predetermined size into a compact representation of the coefficients. The apparatus comprises a tree builder for constructing a tree form representation of the coefficients with leaf nodes representing coefficient values and internal nodes representing the number of bits needed to encode leaf nodes and child nodes of a current internal node. The tree builder stores the tree form representation in a tree buffer of the apparatus, and the tree buffer stores the tree form representation. A tree coder of the apparatus is interconnected to the tree buffer and adapted to read a current tree form representation and to output the encoding from the tree form representation. The tree buffer can include a component for storing at least two tree form representations and the tree builder can be adapted to form a first of the representations while the tree coder can be adapted to read a second of the tree form representations previously created by the tree builder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.