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Content Provider | IEEE Xplore Digital Library |
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Author | Luheng Jia Chi-ying Tsui Au, O.C. Amin Zheng |
Copyright Year | 2015 |
Description | Author affiliation: Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China (Luheng Jia; Chi-ying Tsui; Au, O.C.; Amin Zheng) |
Abstract | Motion estimation (ME) serves as a key tool in a variety of video coding standards. With the increasing need for higher resolution video format, the limited memory bandwidth becomes a bottleneck for ME implementation. The huge data loading from external memory to the on-chip memory and the frequent data fetching from the on-chip memory to the ME engine are two major problems. To reduce both off-chip and on-chip memory bandwidth, we propose a two-layer data reuse scheme. On the macroblock (MB) layer, an advanced Level C data reuse scheme is presented. It employs two cooperating on-chip caches which load data in a novel local-snake scanning manner. On the block layer, we propose a fast variable block size motion estimation with a refined search window (RSW-VBSME). A new approach for hardware implementation of VBSME is then employed based on the fast algorithm. Instead of obtain the SADs of all the modes at the same time, the ME of different block sizes are performed separately. This enables higher data reusability within an MB. The two-layer data reuse scheme archives a more than 90% reduction of off-chip memory bandwidth with a slight increase of on-chip memory size. Moreover, the on-chip memory bandwidth is also greatly reduced compared with other reuse methods with different VBSME implementations. |
Starting Page | 1206 |
Ending Page | 1209 |
File Size | 559559 |
Page Count | 4 |
File Format | |
ISBN | 9781479983919 |
DOI | 10.1109/ISCAS.2015.7168856 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2015-05-24 |
Publisher Place | Portugal |
Access Restriction | Subscribed |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | System-on-chip Bandwidth Loading Video coding Motion estimation Strips Manganese memory bandwidth VBSME data reuse |
Content Type | Text |
Resource Type | Article |
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