Depth buffer compression
US8270736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2008 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Sep 20, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/46
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Device, computer readable medium, and method for selecting compression modes to be applied in a depth buffer (20). The method includes obtaining values corresponding to a tile (30) of the depth buffer (20), selecting a first compression mode (34) from a first plurality of compression modes, compressing the values of the tile (30), writing the compressed values into a first block, based on the first mode (34), and using a preset number of primary bits (34) to store information related to at least one of the first mode (34) and a compression size of the first block, selecting a set of secondary compression modes (32) from a second plurality of compression modes, determining a number of sub-tiles (28), that make up the tile (30), compressing values of the sub-tiles, writing the compressed values into a second block, based on the set of secondary modes (32), and using the same preset number of primary bits (34) to store information related to at least one of the set of secondary modes (32) and a compression size of the second block, comparing the compression size of the tile (30) to the compression size of the sub-tiles (28), choosing the first mode (34) or the set of secondary modes (…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.