a memory hierarchy model based on data reuse for full-search motion estimation on high-definition digital videos
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ID: 153919
2012
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Abstract
The motion estimation is the most complex module in a video encoder requiring a high processing throughput and high memory bandwidth, mainly when the focus is high-definition videos. The throughput problem can be solved increasing the parallelism in the internal operations. The external memory bandwidth may be reduced using a memory hierarchy. This work presents a memory hierarchy model for a full-search motion estimation core. The proposed memory hierarchy model is based on a data reuse scheme considering the full search algorithm features. The proposed memory hierarchy expressively reduces the external memory bandwidth required for the motion estimation process, and it provides a very high data throughput for the ME core. This throughput is necessary to achieve real time when processing high-definition videos. When considering the worst bandwidth scenario, this memory hierarchy is able to reduce the external memory bandwidth in 578 times. A case study for the proposed hierarchy, using 32×32 search window and 8×8 block size, was implemented and prototyped on a Virtex 4 FPGA. The results show that it is possible to reach 38 frames per second when processing full HD frames (1920×1080 pixels) using nearly 299 Mbytes per second of external memory bandwidth.
| Reference Key |
lopes2012internationala
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|---|---|
| Authors | ;Alba Sandyra Bezerra Lopes;Ivan Saraiva Silva;Luciano Volcan Agostini |
| Journal | case reports in ophthalmological medicine |
| Year | 2012 |
| DOI |
10.1155/2012/473725
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| URL | |
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