Z-compression mechanism
US6580427B1 · kind B1 · utility
27Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Dec 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/405
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A graphics system is provided to implement compression of depth or z-data. The graphic system includes a buffer, a status table, and a read/write unit. The buffer stores depth data for multiple blocks of pixels in associated buffer entries. The status table stores status values for the entries of the buffer. The status value for a given entry indicates an access mode for the corresponding depth data according to whether the data is compressed, uncompressed or in a reference state. The read/write unit implements data accesses for a given entry responsive to the status value associated with the entry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.