Linear down/ups-sampling apparatus and generalized scan interleaving-based encoding/decoding method and apparatus using the same
US6611625B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2000 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | May 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/59
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A generalized scan interleaving-based encoding/decoding method using context values of neighboring pixels and an apparatus therefore, and linear down/up-sampling apparatus used in the apparatus are provided. If the down-sampling ratio is m/n, the linear down-sampling apparatus divides the down-sampling ratio into two parts, [1/2K9 and [(m2K)/n], and performs linear down-sampling by applying the two parts sequentially. If the up-sampling ratio is n/m, the linear up-sampling apparatus divides the up-sampling ratio into two parts, [n/(m2K)] and [2K], and performs linear up-sampling by applying the two parts sequentially. By applying the linear down-sampling and up-sampling method to existing generalized an interleaving-based encoding using context values of neighboring pixels, continuously-scalable down-sampling is enabled and by using the down-sampled base layer, the current layer can be encoded and decoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.