Adaptive tile depth filter for the depth buffer bandwidth minimization in the low power graphics systems

Depth buffer bandwidth minimization with depth filter plays an important role in designing low power graphics processors. In this paper, an efficient adaptive tile depth filter (ATDF) algorithm is proposed. The key concept is to consider more occlusion conditions in order to achieve better performan...

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Bibliographic Details
Main Authors: You-Ming Tsao, Chi-Ling Wu, Shao-Yi Chien, Liang-Gee Chen
Format: Conference Proceeding
Language:English
Subjects:
Adaptive filters
Bandwidth
Buffer storage
Digital signal processing
Electronic equipment testing
Graphics
Layout
Pipelines
Tiles
Zirconium
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Summary:Depth buffer bandwidth minimization with depth filter plays an important role in designing low power graphics processors. In this paper, an efficient adaptive tile depth filter (ATDF) algorithm is proposed. The key concept is to consider more occlusion conditions in order to achieve better performance. Two existing algorithms, Z max and Z max algorithms, are integrated to detect both occluded and non-occluded fragments. Moreover, two new techniques, coverage mask and adaptive tile mode, are proposed to further improve the performance. Experiments show that the proposed algorithm can filter out up to 85% fragments to reduce 40% memory bandwidth for test applications with complex scenes, which outperforms the previous works
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2006.1693760